Line data Source code
1 : /******************************************************************************
2 : *
3 : * Project: netCDF read/write Driver
4 : * Purpose: GDAL bindings over netCDF library.
5 : * Author: Frank Warmerdam, warmerdam@pobox.com
6 : * Even Rouault <even.rouault at spatialys.com>
7 : *
8 : ******************************************************************************
9 : * Copyright (c) 2004, Frank Warmerdam
10 : * Copyright (c) 2007-2016, Even Rouault <even.rouault at spatialys.com>
11 : * Copyright (c) 2010, Kyle Shannon <kyle at pobox dot com>
12 : * Copyright (c) 2021, CLS
13 : *
14 : * SPDX-License-Identifier: MIT
15 : ****************************************************************************/
16 :
17 : #include "cpl_port.h"
18 :
19 : #include <array>
20 : #include <cassert>
21 : #include <cctype>
22 : #include <cerrno>
23 : #include <climits>
24 : #include <cmath>
25 : #include <cstdio>
26 : #include <cstdlib>
27 : #include <cstring>
28 : #include <ctime>
29 : #include <algorithm>
30 : #include <limits>
31 : #include <map>
32 : #include <set>
33 : #include <queue>
34 : #include <string>
35 : #include <tuple>
36 : #include <utility>
37 : #include <vector>
38 :
39 : // Must be included after standard includes, otherwise VS2015 fails when
40 : // including <ctime>
41 : #include "netcdfdataset.h"
42 : #include "netcdfdrivercore.h"
43 : #include "netcdfsg.h"
44 : #include "netcdfuffd.h"
45 :
46 : #include "netcdf_mem.h"
47 :
48 : #include "cpl_conv.h"
49 : #include "cpl_error.h"
50 : #include "cpl_float.h"
51 : #include "cpl_json.h"
52 : #include "cpl_minixml.h"
53 : #include "cpl_multiproc.h"
54 : #include "cpl_progress.h"
55 : #include "cpl_time.h"
56 : #include "gdal.h"
57 : #include "gdal_frmts.h"
58 : #include "gdal_priv_templates.hpp"
59 : #include "ogr_core.h"
60 : #include "ogr_srs_api.h"
61 :
62 : // netCDF 4.8 switched to expecting filenames in UTF-8 on Windows
63 : // But with netCDF 4.9 and https://github.com/Unidata/netcdf-c/pull/2277/,
64 : // this is apparently back to expecting filenames in current codepage...
65 : // Detect netCDF 4.8 with NC_ENCZARR
66 : // Detect netCDF 4.9 with NC_NOATTCREORD
67 : #if defined(NC_ENCZARR) && !defined(NC_NOATTCREORD)
68 : #define NETCDF_USES_UTF8
69 : #endif
70 :
71 : // Internal function declarations.
72 :
73 : static bool NCDFIsGDALVersionGTE(const char *pszVersion, int nTarget);
74 :
75 : static void
76 : NCDFAddGDALHistory(int fpImage, const char *pszFilename, bool bWriteGDALVersion,
77 : bool bWriteGDALHistory, const char *pszOldHist,
78 : const char *pszFunctionName,
79 : const char *pszCFVersion = GDAL_DEFAULT_NCDF_CONVENTIONS);
80 :
81 : static void NCDFAddHistory(int fpImage, const char *pszAddHist,
82 : const char *pszOldHist);
83 :
84 : static CPLErr NCDFSafeStrcat(char **ppszDest, const char *pszSrc,
85 : size_t *nDestSize);
86 :
87 : // Var / attribute helper functions.
88 : static CPLErr NCDFPutAttr(int nCdfId, int nVarId, const char *pszAttrName,
89 : const char *pszValue);
90 :
91 : // Replace this where used.
92 : static CPLErr NCDFGet1DVar(int nCdfId, int nVarId, char **pszValue);
93 : static CPLErr NCDFPut1DVar(int nCdfId, int nVarId, const char *pszValue);
94 :
95 : // Replace this where used.
96 : static char **NCDFTokenizeArray(const char *pszValue);
97 : static void CopyMetadata(GDALDataset *poSrcDS, GDALRasterBand *poSrcBand,
98 : GDALRasterBand *poDstBand, int fpImage, int CDFVarID,
99 : const char *pszMatchPrefix = nullptr);
100 :
101 : // NetCDF-4 groups helper functions.
102 : // They all work also for NetCDF-3 files which are considered as
103 : // NetCDF-4 file with only one group.
104 : static CPLErr NCDFOpenSubDataset(int nCdfId, const char *pszSubdatasetName,
105 : int *pnGroupId, int *pnVarId);
106 : static CPLErr NCDFGetVisibleDims(int nGroupId, int *pnDims, int **ppanDimIds);
107 : static CPLErr NCDFGetSubGroups(int nGroupId, int *pnSubGroups,
108 : int **ppanSubGroupIds);
109 : static CPLErr NCDFGetGroupFullName(int nGroupId, char **ppszFullName,
110 : bool bNC3Compat = true);
111 : static CPLErr NCDFGetVarFullName(int nGroupId, int nVarId, char **ppszFullName,
112 : bool bNC3Compat = true);
113 : static CPLErr NCDFGetRootGroup(int nStartGroupId, int *pnRootGroupId);
114 :
115 : static CPLErr NCDFResolveVarFullName(int nStartGroupId, const char *pszVar,
116 : char **ppszFullName,
117 : bool bMandatory = false);
118 : static CPLErr NCDFResolveAttInt(int nStartGroupId, int nStartVarId,
119 : const char *pszAtt, int *pnAtt,
120 : bool bMandatory = false);
121 : static CPLErr NCDFGetCoordAndBoundVarFullNames(int nCdfId, char ***ppapszVars);
122 :
123 : // Uncomment this for more debug output.
124 : // #define NCDF_DEBUG 1
125 :
126 : CPLMutex *hNCMutex = nullptr;
127 :
128 : // Workaround https://github.com/OSGeo/gdal/issues/6253
129 : // Having 2 netCDF handles on the same file doesn't work in a multi-threaded
130 : // way. Apparently having the same handle works better (this is OK since
131 : // we have a global mutex on the netCDF library)
132 : static std::map<std::string, int> goMapNameToNetCDFId;
133 : static std::map<int, std::pair<std::string, int>> goMapNetCDFIdToKeyAndCount;
134 :
135 663 : int GDAL_nc_open(const char *pszFilename, int nMode, int *pID)
136 : {
137 1326 : std::string osKey(pszFilename);
138 663 : osKey += "#####";
139 663 : osKey += std::to_string(nMode);
140 663 : auto oIter = goMapNameToNetCDFId.find(osKey);
141 663 : if (oIter == goMapNameToNetCDFId.end())
142 : {
143 614 : int ret = nc_open(pszFilename, nMode, pID);
144 614 : if (ret != NC_NOERR)
145 3 : return ret;
146 611 : goMapNameToNetCDFId[osKey] = *pID;
147 611 : goMapNetCDFIdToKeyAndCount[*pID] =
148 1222 : std::pair<std::string, int>(osKey, 1);
149 611 : return ret;
150 : }
151 : else
152 : {
153 49 : *pID = oIter->second;
154 49 : goMapNetCDFIdToKeyAndCount[oIter->second].second++;
155 49 : return NC_NOERR;
156 : }
157 : }
158 :
159 918 : int GDAL_nc_close(int cdfid)
160 : {
161 918 : int ret = NC_NOERR;
162 918 : auto oIter = goMapNetCDFIdToKeyAndCount.find(cdfid);
163 918 : if (oIter != goMapNetCDFIdToKeyAndCount.end())
164 : {
165 660 : if (--oIter->second.second == 0)
166 : {
167 611 : ret = nc_close(cdfid);
168 611 : goMapNameToNetCDFId.erase(oIter->second.first);
169 611 : goMapNetCDFIdToKeyAndCount.erase(oIter);
170 : }
171 : }
172 : else
173 : {
174 : // we can go here if file opened with nc_open_mem() or nc_create()
175 258 : ret = nc_close(cdfid);
176 : }
177 918 : return ret;
178 : }
179 :
180 : /************************************************************************/
181 : /* ==================================================================== */
182 : /* netCDFRasterBand */
183 : /* ==================================================================== */
184 : /************************************************************************/
185 :
186 : class netCDFRasterBand final : public GDALPamRasterBand
187 : {
188 : friend class netCDFDataset;
189 :
190 : nc_type nc_datatype;
191 : int cdfid;
192 : int nZId;
193 : int nZDim;
194 : int nLevel;
195 : int nBandXPos;
196 : int nBandYPos;
197 : int *panBandZPos;
198 : int *panBandZLev;
199 : bool m_bNoDataSet = false;
200 : double m_dfNoDataValue = 0;
201 : bool m_bNoDataSetAsInt64 = false;
202 : int64_t m_nNodataValueInt64 = 0;
203 : bool m_bNoDataSetAsUInt64 = false;
204 : uint64_t m_nNodataValueUInt64 = 0;
205 : bool bValidRangeValid = false;
206 : double adfValidRange[2]{0, 0};
207 : bool m_bHaveScale = false;
208 : bool m_bHaveOffset = false;
209 : double m_dfScale = 1;
210 : double m_dfOffset = 0;
211 : CPLString m_osUnitType{};
212 : bool bSignedData;
213 : bool bCheckLongitude;
214 : bool m_bCreateMetadataFromOtherVarsDone = false;
215 :
216 : void CreateMetadataFromAttributes();
217 : void CreateMetadataFromOtherVars();
218 :
219 : template <class T>
220 : void CheckData(void *pImage, void *pImageNC, size_t nTmpBlockXSize,
221 : size_t nTmpBlockYSize, bool bCheckIsNan = false);
222 : template <class T>
223 : void CheckDataCpx(void *pImage, void *pImageNC, size_t nTmpBlockXSize,
224 : size_t nTmpBlockYSize, bool bCheckIsNan = false);
225 : void SetBlockSize();
226 :
227 : bool FetchNetcdfChunk(size_t xstart, size_t ystart, void *pImage);
228 :
229 : void SetNoDataValueNoUpdate(double dfNoData);
230 : void SetNoDataValueNoUpdate(int64_t nNoData);
231 : void SetNoDataValueNoUpdate(uint64_t nNoData);
232 :
233 : void SetOffsetNoUpdate(double dfVal);
234 : void SetScaleNoUpdate(double dfVal);
235 : void SetUnitTypeNoUpdate(const char *pszNewValue);
236 :
237 : protected:
238 : CPLXMLNode *SerializeToXML(const char *pszUnused) override;
239 :
240 : public:
241 : struct CONSTRUCTOR_OPEN
242 : {
243 : };
244 :
245 : struct CONSTRUCTOR_CREATE
246 : {
247 : };
248 :
249 : netCDFRasterBand(const CONSTRUCTOR_OPEN &, netCDFDataset *poDS,
250 : int nGroupId, int nZId, int nZDim, int nLevel,
251 : const int *panBandZLen, const int *panBandPos, int nBand);
252 : netCDFRasterBand(const CONSTRUCTOR_CREATE &, netCDFDataset *poDS,
253 : GDALDataType eType, int nBand, bool bSigned = true,
254 : const char *pszBandName = nullptr,
255 : const char *pszLongName = nullptr, int nZId = -1,
256 : int nZDim = 2, int nLevel = 0,
257 : const int *panBandZLev = nullptr,
258 : const int *panBandZPos = nullptr,
259 : const int *paDimIds = nullptr);
260 : virtual ~netCDFRasterBand();
261 :
262 : virtual double GetNoDataValue(int *) override;
263 : virtual int64_t GetNoDataValueAsInt64(int *pbSuccess = nullptr) override;
264 : virtual uint64_t GetNoDataValueAsUInt64(int *pbSuccess = nullptr) override;
265 : virtual CPLErr SetNoDataValue(double) override;
266 : virtual CPLErr SetNoDataValueAsInt64(int64_t nNoData) override;
267 : virtual CPLErr SetNoDataValueAsUInt64(uint64_t nNoData) override;
268 : // virtual CPLErr DeleteNoDataValue();
269 : virtual double GetOffset(int *) override;
270 : virtual CPLErr SetOffset(double) override;
271 : virtual double GetScale(int *) override;
272 : virtual CPLErr SetScale(double) override;
273 : virtual const char *GetUnitType() override;
274 : virtual CPLErr SetUnitType(const char *) override;
275 : virtual CPLErr IReadBlock(int, int, void *) override;
276 : virtual CPLErr IWriteBlock(int, int, void *) override;
277 :
278 : char **GetMetadata(const char *pszDomain = "") override;
279 : const char *GetMetadataItem(const char *pszName,
280 : const char *pszDomain = "") override;
281 :
282 : virtual CPLErr SetMetadataItem(const char *pszName, const char *pszValue,
283 : const char *pszDomain = "") override;
284 : virtual CPLErr SetMetadata(char **papszMD,
285 : const char *pszDomain = "") override;
286 : };
287 :
288 : /************************************************************************/
289 : /* netCDFRasterBand() */
290 : /************************************************************************/
291 :
292 469 : netCDFRasterBand::netCDFRasterBand(const netCDFRasterBand::CONSTRUCTOR_OPEN &,
293 : netCDFDataset *poNCDFDS, int nGroupId,
294 : int nZIdIn, int nZDimIn, int nLevelIn,
295 : const int *panBandZLevIn,
296 469 : const int *panBandZPosIn, int nBandIn)
297 : : nc_datatype(NC_NAT), cdfid(nGroupId), nZId(nZIdIn), nZDim(nZDimIn),
298 469 : nLevel(nLevelIn), nBandXPos(panBandZPosIn[0]),
299 469 : nBandYPos(nZDim == 1 ? -1 : panBandZPosIn[1]), panBandZPos(nullptr),
300 : panBandZLev(nullptr),
301 : bSignedData(true), // Default signed, except for Byte.
302 938 : bCheckLongitude(false)
303 : {
304 469 : poDS = poNCDFDS;
305 469 : nBand = nBandIn;
306 :
307 : // Take care of all other dimensions.
308 469 : if (nZDim > 2)
309 : {
310 168 : panBandZPos = static_cast<int *>(CPLCalloc(nZDim - 1, sizeof(int)));
311 168 : panBandZLev = static_cast<int *>(CPLCalloc(nZDim - 1, sizeof(int)));
312 :
313 462 : for (int i = 0; i < nZDim - 2; i++)
314 : {
315 294 : panBandZPos[i] = panBandZPosIn[i + 2];
316 294 : panBandZLev[i] = panBandZLevIn[i];
317 : }
318 : }
319 :
320 469 : nRasterXSize = poDS->GetRasterXSize();
321 469 : nRasterYSize = poDS->GetRasterYSize();
322 469 : nBlockXSize = poDS->GetRasterXSize();
323 469 : nBlockYSize = 1;
324 :
325 : // Get the type of the "z" variable, our target raster array.
326 469 : if (nc_inq_var(cdfid, nZId, nullptr, &nc_datatype, nullptr, nullptr,
327 469 : nullptr) != NC_NOERR)
328 : {
329 0 : CPLError(CE_Failure, CPLE_AppDefined, "Error in nc_var_inq() on 'z'.");
330 0 : return;
331 : }
332 :
333 469 : if (NCDFIsUserDefinedType(cdfid, nc_datatype))
334 : {
335 : // First enquire and check that the number of fields is 2
336 : size_t nfields, compoundsize;
337 5 : if (nc_inq_compound(cdfid, nc_datatype, nullptr, &compoundsize,
338 5 : &nfields) != NC_NOERR)
339 : {
340 0 : CPLError(CE_Failure, CPLE_AppDefined,
341 : "Error in nc_inq_compound() on 'z'.");
342 0 : return;
343 : }
344 :
345 5 : if (nfields != 2)
346 : {
347 0 : CPLError(CE_Failure, CPLE_AppDefined,
348 : "Unsupported data type encountered in nc_inq_compound() "
349 : "on 'z'.");
350 0 : return;
351 : }
352 :
353 : // Now check that that two types are the same in the struct.
354 : nc_type field_type1, field_type2;
355 : int field_dims1, field_dims2;
356 5 : if (nc_inq_compound_field(cdfid, nc_datatype, 0, nullptr, nullptr,
357 : &field_type1, &field_dims1,
358 5 : nullptr) != NC_NOERR)
359 : {
360 0 : CPLError(
361 : CE_Failure, CPLE_AppDefined,
362 : "Error in querying Field 1 in nc_inq_compound_field() on 'z'.");
363 0 : return;
364 : }
365 :
366 5 : if (nc_inq_compound_field(cdfid, nc_datatype, 0, nullptr, nullptr,
367 : &field_type2, &field_dims2,
368 5 : nullptr) != NC_NOERR)
369 : {
370 0 : CPLError(
371 : CE_Failure, CPLE_AppDefined,
372 : "Error in querying Field 2 in nc_inq_compound_field() on 'z'.");
373 0 : return;
374 : }
375 :
376 5 : if ((field_type1 != field_type2) || (field_dims1 != field_dims2) ||
377 5 : (field_dims1 != 0))
378 : {
379 0 : CPLError(CE_Failure, CPLE_AppDefined,
380 : "Error in interpreting compound data type on 'z'.");
381 0 : return;
382 : }
383 :
384 5 : if (field_type1 == NC_SHORT)
385 0 : eDataType = GDT_CInt16;
386 5 : else if (field_type1 == NC_INT)
387 0 : eDataType = GDT_CInt32;
388 5 : else if (field_type1 == NC_FLOAT)
389 4 : eDataType = GDT_CFloat32;
390 1 : else if (field_type1 == NC_DOUBLE)
391 1 : eDataType = GDT_CFloat64;
392 : else
393 : {
394 0 : CPLError(CE_Failure, CPLE_AppDefined,
395 : "Unsupported netCDF compound data type encountered.");
396 0 : return;
397 : }
398 : }
399 : else
400 : {
401 464 : if (nc_datatype == NC_BYTE)
402 143 : eDataType = GDT_Byte;
403 321 : else if (nc_datatype == NC_CHAR)
404 0 : eDataType = GDT_Byte;
405 321 : else if (nc_datatype == NC_SHORT)
406 41 : eDataType = GDT_Int16;
407 280 : else if (nc_datatype == NC_INT)
408 89 : eDataType = GDT_Int32;
409 191 : else if (nc_datatype == NC_FLOAT)
410 115 : eDataType = GDT_Float32;
411 76 : else if (nc_datatype == NC_DOUBLE)
412 40 : eDataType = GDT_Float64;
413 36 : else if (nc_datatype == NC_UBYTE)
414 14 : eDataType = GDT_Byte;
415 22 : else if (nc_datatype == NC_USHORT)
416 4 : eDataType = GDT_UInt16;
417 18 : else if (nc_datatype == NC_UINT)
418 3 : eDataType = GDT_UInt32;
419 15 : else if (nc_datatype == NC_INT64)
420 8 : eDataType = GDT_Int64;
421 7 : else if (nc_datatype == NC_UINT64)
422 7 : eDataType = GDT_UInt64;
423 : else
424 : {
425 0 : if (nBand == 1)
426 0 : CPLError(CE_Warning, CPLE_AppDefined,
427 : "Unsupported netCDF datatype (%d), treat as Float32.",
428 0 : static_cast<int>(nc_datatype));
429 0 : eDataType = GDT_Float32;
430 0 : nc_datatype = NC_FLOAT;
431 : }
432 : }
433 :
434 : // Find and set No Data for this variable.
435 469 : nc_type atttype = NC_NAT;
436 469 : size_t attlen = 0;
437 469 : const char *pszNoValueName = nullptr;
438 :
439 : // Find attribute name, either _FillValue or missing_value.
440 469 : int status = nc_inq_att(cdfid, nZId, NCDF_FillValue, &atttype, &attlen);
441 469 : if (status == NC_NOERR)
442 : {
443 248 : pszNoValueName = NCDF_FillValue;
444 : }
445 : else
446 : {
447 221 : status = nc_inq_att(cdfid, nZId, "missing_value", &atttype, &attlen);
448 221 : if (status == NC_NOERR)
449 : {
450 12 : pszNoValueName = "missing_value";
451 : }
452 : }
453 :
454 : // Fetch missing value.
455 469 : double dfNoData = 0.0;
456 469 : bool bGotNoData = false;
457 469 : int64_t nNoDataAsInt64 = 0;
458 469 : bool bGotNoDataAsInt64 = false;
459 469 : uint64_t nNoDataAsUInt64 = 0;
460 469 : bool bGotNoDataAsUInt64 = false;
461 469 : if (status == NC_NOERR)
462 : {
463 260 : nc_type nAttrType = NC_NAT;
464 260 : size_t nAttrLen = 0;
465 260 : status = nc_inq_att(cdfid, nZId, pszNoValueName, &nAttrType, &nAttrLen);
466 260 : if (status == NC_NOERR && nAttrLen == 1 && nAttrType == NC_INT64)
467 : {
468 : long long v;
469 7 : nc_get_att_longlong(cdfid, nZId, pszNoValueName, &v);
470 7 : bGotNoData = true;
471 7 : bGotNoDataAsInt64 = true;
472 7 : nNoDataAsInt64 = static_cast<int64_t>(v);
473 : }
474 253 : else if (status == NC_NOERR && nAttrLen == 1 && nAttrType == NC_UINT64)
475 : {
476 : unsigned long long v;
477 7 : nc_get_att_ulonglong(cdfid, nZId, pszNoValueName, &v);
478 7 : bGotNoData = true;
479 7 : bGotNoDataAsUInt64 = true;
480 7 : nNoDataAsUInt64 = static_cast<uint64_t>(v);
481 : }
482 246 : else if (NCDFGetAttr(cdfid, nZId, pszNoValueName, &dfNoData) == CE_None)
483 : {
484 245 : bGotNoData = true;
485 : }
486 : }
487 :
488 : // If NoData was not found, use the default value, but for non-Byte types
489 : // as it is not recommended:
490 : // https://www.unidata.ucar.edu/software/netcdf/docs/attribute_conventions.html
491 469 : nc_type vartype = NC_NAT;
492 469 : if (!bGotNoData)
493 : {
494 210 : nc_inq_vartype(cdfid, nZId, &vartype);
495 210 : if (vartype == NC_INT64)
496 : {
497 : nNoDataAsInt64 =
498 1 : NCDFGetDefaultNoDataValueAsInt64(cdfid, nZId, bGotNoData);
499 1 : bGotNoDataAsInt64 = bGotNoData;
500 : }
501 209 : else if (vartype == NC_UINT64)
502 : {
503 : nNoDataAsUInt64 =
504 0 : NCDFGetDefaultNoDataValueAsUInt64(cdfid, nZId, bGotNoData);
505 0 : bGotNoDataAsUInt64 = bGotNoData;
506 : }
507 209 : else if (vartype != NC_CHAR && vartype != NC_BYTE &&
508 89 : vartype != NC_UBYTE)
509 : {
510 81 : dfNoData =
511 81 : NCDFGetDefaultNoDataValue(cdfid, nZId, vartype, bGotNoData);
512 81 : if (bGotNoData)
513 : {
514 70 : CPLDebug("GDAL_netCDF",
515 : "did not get nodata value for variable #%d, using "
516 : "default %f",
517 : nZId, dfNoData);
518 : }
519 : }
520 : }
521 :
522 469 : bool bHasUnderscoreUnsignedAttr = false;
523 469 : bool bUnderscoreUnsignedAttrVal = false;
524 : {
525 469 : char *pszTemp = nullptr;
526 469 : if (NCDFGetAttr(cdfid, nZId, "_Unsigned", &pszTemp) == CE_None)
527 : {
528 135 : if (EQUAL(pszTemp, "true"))
529 : {
530 127 : bHasUnderscoreUnsignedAttr = true;
531 127 : bUnderscoreUnsignedAttrVal = true;
532 : }
533 8 : else if (EQUAL(pszTemp, "false"))
534 : {
535 8 : bHasUnderscoreUnsignedAttr = true;
536 8 : bUnderscoreUnsignedAttrVal = false;
537 : }
538 135 : CPLFree(pszTemp);
539 : }
540 : }
541 :
542 : // Look for valid_range or valid_min/valid_max.
543 :
544 : // First look for valid_range.
545 469 : if (CPLFetchBool(poNCDFDS->GetOpenOptions(), "HONOUR_VALID_RANGE", true))
546 : {
547 467 : char *pszValidRange = nullptr;
548 467 : if (NCDFGetAttr(cdfid, nZId, "valid_range", &pszValidRange) ==
549 128 : CE_None &&
550 595 : pszValidRange[0] == '{' &&
551 128 : pszValidRange[strlen(pszValidRange) - 1] == '}')
552 : {
553 : const std::string osValidRange =
554 384 : std::string(pszValidRange).substr(1, strlen(pszValidRange) - 2);
555 : const CPLStringList aosValidRange(
556 256 : CSLTokenizeString2(osValidRange.c_str(), ",", 0));
557 128 : if (aosValidRange.size() == 2 &&
558 256 : CPLGetValueType(aosValidRange[0]) != CPL_VALUE_STRING &&
559 128 : CPLGetValueType(aosValidRange[1]) != CPL_VALUE_STRING)
560 : {
561 128 : bValidRangeValid = true;
562 128 : adfValidRange[0] = CPLAtof(aosValidRange[0]);
563 128 : adfValidRange[1] = CPLAtof(aosValidRange[1]);
564 : }
565 : }
566 467 : CPLFree(pszValidRange);
567 :
568 : // If not found look for valid_min and valid_max.
569 467 : if (!bValidRangeValid)
570 : {
571 339 : double dfMin = 0;
572 339 : double dfMax = 0;
573 354 : if (NCDFGetAttr(cdfid, nZId, "valid_min", &dfMin) == CE_None &&
574 15 : NCDFGetAttr(cdfid, nZId, "valid_max", &dfMax) == CE_None)
575 : {
576 8 : adfValidRange[0] = dfMin;
577 8 : adfValidRange[1] = dfMax;
578 8 : bValidRangeValid = true;
579 : }
580 : }
581 :
582 467 : if (bValidRangeValid &&
583 136 : (adfValidRange[0] < 0 || adfValidRange[1] < 0) &&
584 17 : nc_datatype == NC_SHORT && bHasUnderscoreUnsignedAttr &&
585 : bUnderscoreUnsignedAttrVal)
586 : {
587 2 : if (adfValidRange[0] < 0)
588 0 : adfValidRange[0] += 65536;
589 2 : if (adfValidRange[1] < 0)
590 2 : adfValidRange[1] += 65536;
591 2 : if (adfValidRange[0] <= adfValidRange[1])
592 : {
593 : // Updating metadata item
594 2 : GDALPamRasterBand::SetMetadataItem(
595 : "valid_range",
596 2 : CPLSPrintf("{%d,%d}", static_cast<int>(adfValidRange[0]),
597 2 : static_cast<int>(adfValidRange[1])));
598 : }
599 : }
600 :
601 467 : if (bValidRangeValid && adfValidRange[0] > adfValidRange[1])
602 : {
603 0 : CPLError(CE_Warning, CPLE_AppDefined,
604 : "netCDFDataset::valid_range: min > max:\n"
605 : " min: %lf\n max: %lf\n",
606 : adfValidRange[0], adfValidRange[1]);
607 0 : bValidRangeValid = false;
608 0 : adfValidRange[0] = 0.0;
609 0 : adfValidRange[1] = 0.0;
610 : }
611 : }
612 :
613 : // Special For Byte Bands: check for signed/unsigned byte.
614 469 : if (nc_datatype == NC_BYTE)
615 : {
616 : // netcdf uses signed byte by default, but GDAL uses unsigned by default
617 : // This may cause unexpected results, but is needed for back-compat.
618 143 : if (poNCDFDS->bIsGdalFile)
619 122 : bSignedData = false;
620 : else
621 21 : bSignedData = true;
622 :
623 : // For NC4 format NC_BYTE is (normally) signed, NC_UBYTE is unsigned.
624 : // But in case a NC3 file was converted automatically and has hints
625 : // that it is unsigned, take them into account
626 143 : if (poNCDFDS->eFormat == NCDF_FORMAT_NC4)
627 : {
628 3 : bSignedData = true;
629 : }
630 :
631 : // If we got valid_range, test for signed/unsigned range.
632 : // https://docs.unidata.ucar.edu/netcdf-c/current/attribute_conventions.html
633 143 : if (bValidRangeValid)
634 : {
635 : // If we got valid_range={0,255}, treat as unsigned.
636 124 : if (adfValidRange[0] == 0 && adfValidRange[1] == 255)
637 : {
638 116 : bSignedData = false;
639 : // Reset valid_range.
640 116 : bValidRangeValid = false;
641 : }
642 : // If we got valid_range={-128,127}, treat as signed.
643 8 : else if (adfValidRange[0] == -128 && adfValidRange[1] == 127)
644 : {
645 8 : bSignedData = true;
646 : // Reset valid_range.
647 8 : bValidRangeValid = false;
648 : }
649 : }
650 : // Else test for _Unsigned.
651 : // https://docs.unidata.ucar.edu/nug/current/best_practices.html
652 : else
653 : {
654 19 : if (bHasUnderscoreUnsignedAttr)
655 7 : bSignedData = !bUnderscoreUnsignedAttrVal;
656 : }
657 :
658 143 : if (bSignedData)
659 : {
660 20 : eDataType = GDT_Int8;
661 : }
662 123 : else if (dfNoData < 0)
663 : {
664 : // Fix nodata value as it was stored signed.
665 6 : dfNoData += 256;
666 6 : if (pszNoValueName)
667 : {
668 : // Updating metadata item
669 6 : GDALPamRasterBand::SetMetadataItem(
670 : pszNoValueName,
671 : CPLSPrintf("%d", static_cast<int>(dfNoData)));
672 : }
673 : }
674 : }
675 326 : else if (nc_datatype == NC_SHORT)
676 : {
677 41 : if (bHasUnderscoreUnsignedAttr)
678 : {
679 4 : bSignedData = !bUnderscoreUnsignedAttrVal;
680 4 : if (!bSignedData)
681 4 : eDataType = GDT_UInt16;
682 : }
683 :
684 : // Fix nodata value as it was stored signed.
685 41 : if (!bSignedData && dfNoData < 0)
686 : {
687 4 : dfNoData += 65536;
688 4 : if (pszNoValueName)
689 : {
690 : // Updating metadata item
691 4 : GDALPamRasterBand::SetMetadataItem(
692 : pszNoValueName,
693 : CPLSPrintf("%d", static_cast<int>(dfNoData)));
694 : }
695 : }
696 : }
697 :
698 285 : else if (nc_datatype == NC_UBYTE || nc_datatype == NC_USHORT ||
699 267 : nc_datatype == NC_UINT || nc_datatype == NC_UINT64)
700 : {
701 28 : bSignedData = false;
702 : }
703 :
704 469 : CPLDebug("GDAL_netCDF", "netcdf type=%d gdal type=%d signedByte=%d",
705 469 : nc_datatype, eDataType, static_cast<int>(bSignedData));
706 :
707 469 : if (bGotNoData)
708 : {
709 : // Set nodata value.
710 330 : if (bGotNoDataAsInt64)
711 : {
712 8 : if (eDataType == GDT_Int64)
713 : {
714 8 : SetNoDataValueNoUpdate(nNoDataAsInt64);
715 : }
716 0 : else if (eDataType == GDT_UInt64 && nNoDataAsInt64 >= 0)
717 : {
718 0 : SetNoDataValueNoUpdate(static_cast<uint64_t>(nNoDataAsInt64));
719 : }
720 : else
721 : {
722 0 : SetNoDataValueNoUpdate(static_cast<double>(nNoDataAsInt64));
723 : }
724 : }
725 322 : else if (bGotNoDataAsUInt64)
726 : {
727 7 : if (eDataType == GDT_UInt64)
728 : {
729 7 : SetNoDataValueNoUpdate(nNoDataAsUInt64);
730 : }
731 0 : else if (eDataType == GDT_Int64 &&
732 : nNoDataAsUInt64 <=
733 0 : static_cast<uint64_t>(
734 0 : std::numeric_limits<int64_t>::max()))
735 : {
736 0 : SetNoDataValueNoUpdate(static_cast<int64_t>(nNoDataAsUInt64));
737 : }
738 : else
739 : {
740 0 : SetNoDataValueNoUpdate(static_cast<double>(nNoDataAsUInt64));
741 : }
742 : }
743 : else
744 : {
745 : #ifdef NCDF_DEBUG
746 : CPLDebug("GDAL_netCDF", "SetNoDataValue(%f) read", dfNoData);
747 : #endif
748 315 : if (eDataType == GDT_Int64 && GDALIsValueExactAs<int64_t>(dfNoData))
749 : {
750 0 : SetNoDataValueNoUpdate(static_cast<int64_t>(dfNoData));
751 : }
752 315 : else if (eDataType == GDT_UInt64 &&
753 0 : GDALIsValueExactAs<uint64_t>(dfNoData))
754 : {
755 0 : SetNoDataValueNoUpdate(static_cast<uint64_t>(dfNoData));
756 : }
757 : else
758 : {
759 315 : SetNoDataValueNoUpdate(dfNoData);
760 : }
761 : }
762 : }
763 :
764 469 : CreateMetadataFromAttributes();
765 :
766 : // Attempt to fetch the scale_factor and add_offset attributes for the
767 : // variable and set them. If these values are not available, set
768 : // offset to 0 and scale to 1.
769 469 : if (nc_inq_attid(cdfid, nZId, CF_ADD_OFFSET, nullptr) == NC_NOERR)
770 : {
771 16 : double dfOffset = 0;
772 16 : status = nc_get_att_double(cdfid, nZId, CF_ADD_OFFSET, &dfOffset);
773 16 : CPLDebug("GDAL_netCDF", "got add_offset=%.16g, status=%d", dfOffset,
774 : status);
775 16 : SetOffsetNoUpdate(dfOffset);
776 : }
777 :
778 469 : bool bHasScale = false;
779 469 : if (nc_inq_attid(cdfid, nZId, CF_SCALE_FACTOR, nullptr) == NC_NOERR)
780 : {
781 20 : bHasScale = true;
782 20 : double dfScale = 1;
783 20 : status = nc_get_att_double(cdfid, nZId, CF_SCALE_FACTOR, &dfScale);
784 20 : CPLDebug("GDAL_netCDF", "got scale_factor=%.16g, status=%d", dfScale,
785 : status);
786 20 : SetScaleNoUpdate(dfScale);
787 : }
788 :
789 12 : if (bValidRangeValid && GDALDataTypeIsInteger(eDataType) &&
790 4 : eDataType != GDT_Int64 && eDataType != GDT_UInt64 &&
791 4 : (std::fabs(std::round(adfValidRange[0]) - adfValidRange[0]) > 1e-5 ||
792 481 : std::fabs(std::round(adfValidRange[1]) - adfValidRange[1]) > 1e-5) &&
793 1 : CSLFetchNameValue(poNCDFDS->GetOpenOptions(), "HONOUR_VALID_RANGE") ==
794 : nullptr)
795 : {
796 1 : CPLError(CE_Warning, CPLE_AppDefined,
797 : "validity range = %f, %f contains floating-point values, "
798 : "whereas data type is integer. valid_range is thus likely "
799 : "wrong%s. Ignoring it.",
800 : adfValidRange[0], adfValidRange[1],
801 : bHasScale ? " (likely scaled using scale_factor/add_factor "
802 : "whereas it should be using the packed data type)"
803 : : "");
804 1 : bValidRangeValid = false;
805 1 : adfValidRange[0] = 0.0;
806 1 : adfValidRange[1] = 0.0;
807 : }
808 :
809 : // Should we check for longitude values > 360?
810 469 : bCheckLongitude =
811 938 : CPLTestBool(CPLGetConfigOption("GDAL_NETCDF_CENTERLONG_180", "YES")) &&
812 469 : NCDFIsVarLongitude(cdfid, nZId, nullptr);
813 :
814 : // Attempt to fetch the units attribute for the variable and set it.
815 469 : SetUnitTypeNoUpdate(netCDFRasterBand::GetMetadataItem(CF_UNITS));
816 :
817 469 : SetBlockSize();
818 : }
819 :
820 650 : void netCDFRasterBand::SetBlockSize()
821 : {
822 : // Check for variable chunking (netcdf-4 only).
823 : // GDAL block size should be set to hdf5 chunk size.
824 650 : int nTmpFormat = 0;
825 650 : int status = nc_inq_format(cdfid, &nTmpFormat);
826 650 : NetCDFFormatEnum eTmpFormat = static_cast<NetCDFFormatEnum>(nTmpFormat);
827 650 : if ((status == NC_NOERR) &&
828 558 : (eTmpFormat == NCDF_FORMAT_NC4 || eTmpFormat == NCDF_FORMAT_NC4C))
829 : {
830 108 : size_t chunksize[MAX_NC_DIMS] = {};
831 : // Check for chunksize and set it as the blocksize (optimizes read).
832 108 : status = nc_inq_var_chunking(cdfid, nZId, &nTmpFormat, chunksize);
833 108 : if ((status == NC_NOERR) && (nTmpFormat == NC_CHUNKED))
834 : {
835 13 : nBlockXSize = (int)chunksize[nZDim - 1];
836 13 : if (nZDim >= 2)
837 13 : nBlockYSize = (int)chunksize[nZDim - 2];
838 : else
839 0 : nBlockYSize = 1;
840 : }
841 : }
842 :
843 : // Deal with bottom-up datasets and nBlockYSize != 1.
844 650 : auto poGDS = static_cast<netCDFDataset *>(poDS);
845 650 : if (poGDS->bBottomUp && nBlockYSize != 1 && poGDS->poChunkCache == nullptr)
846 : {
847 5 : if (poGDS->eAccess == GA_ReadOnly)
848 : {
849 : // Try to cache 1 or 2 'rows' of netCDF chunks along the whole
850 : // width of the raster
851 5 : size_t nChunks =
852 5 : static_cast<size_t>(DIV_ROUND_UP(nRasterXSize, nBlockXSize));
853 5 : if ((nRasterYSize % nBlockYSize) != 0)
854 1 : nChunks *= 2;
855 : const size_t nChunkSize =
856 5 : static_cast<size_t>(GDALGetDataTypeSizeBytes(eDataType)) *
857 5 : nBlockXSize * nBlockYSize;
858 5 : constexpr size_t MAX_CACHE_SIZE = 100 * 1024 * 1024;
859 5 : nChunks = std::min(nChunks, MAX_CACHE_SIZE / nChunkSize);
860 5 : if (nChunks)
861 : {
862 5 : poGDS->poChunkCache.reset(
863 5 : new netCDFDataset::ChunkCacheType(nChunks));
864 : }
865 : }
866 : else
867 : {
868 0 : nBlockYSize = 1;
869 : }
870 : }
871 650 : }
872 :
873 : // Constructor in create mode.
874 : // If nZId and following variables are not passed, the band will have 2
875 : // dimensions.
876 : // TODO: Get metadata, missing val from band #1 if nZDim > 2.
877 181 : netCDFRasterBand::netCDFRasterBand(
878 : const netCDFRasterBand::CONSTRUCTOR_CREATE &, netCDFDataset *poNCDFDS,
879 : const GDALDataType eTypeIn, int nBandIn, bool bSigned,
880 : const char *pszBandName, const char *pszLongName, int nZIdIn, int nZDimIn,
881 : int nLevelIn, const int *panBandZLevIn, const int *panBandZPosIn,
882 181 : const int *paDimIds)
883 181 : : nc_datatype(NC_NAT), cdfid(poNCDFDS->GetCDFID()), nZId(nZIdIn),
884 : nZDim(nZDimIn), nLevel(nLevelIn), nBandXPos(1), nBandYPos(0),
885 : panBandZPos(nullptr), panBandZLev(nullptr), bSignedData(bSigned),
886 181 : bCheckLongitude(false), m_bCreateMetadataFromOtherVarsDone(true)
887 : {
888 181 : poDS = poNCDFDS;
889 181 : nBand = nBandIn;
890 :
891 181 : nRasterXSize = poDS->GetRasterXSize();
892 181 : nRasterYSize = poDS->GetRasterYSize();
893 181 : nBlockXSize = poDS->GetRasterXSize();
894 181 : nBlockYSize = 1;
895 :
896 181 : if (poDS->GetAccess() != GA_Update)
897 : {
898 0 : CPLError(CE_Failure, CPLE_NotSupported,
899 : "Dataset is not in update mode, "
900 : "wrong netCDFRasterBand constructor");
901 0 : return;
902 : }
903 :
904 : // Take care of all other dimensions.
905 181 : if (nZDim > 2 && paDimIds != nullptr)
906 : {
907 27 : nBandXPos = panBandZPosIn[0];
908 27 : nBandYPos = panBandZPosIn[1];
909 :
910 27 : panBandZPos = static_cast<int *>(CPLCalloc(nZDim - 1, sizeof(int)));
911 27 : panBandZLev = static_cast<int *>(CPLCalloc(nZDim - 1, sizeof(int)));
912 :
913 76 : for (int i = 0; i < nZDim - 2; i++)
914 : {
915 49 : panBandZPos[i] = panBandZPosIn[i + 2];
916 49 : panBandZLev[i] = panBandZLevIn[i];
917 : }
918 : }
919 :
920 : // Get the type of the "z" variable, our target raster array.
921 181 : eDataType = eTypeIn;
922 :
923 181 : switch (eDataType)
924 : {
925 76 : case GDT_Byte:
926 76 : nc_datatype = NC_BYTE;
927 : // NC_UBYTE (unsigned byte) is only available for NC4.
928 76 : if (poNCDFDS->eFormat == NCDF_FORMAT_NC4)
929 3 : nc_datatype = NC_UBYTE;
930 76 : break;
931 7 : case GDT_Int8:
932 7 : nc_datatype = NC_BYTE;
933 7 : break;
934 11 : case GDT_Int16:
935 11 : nc_datatype = NC_SHORT;
936 11 : break;
937 24 : case GDT_Int32:
938 24 : nc_datatype = NC_INT;
939 24 : break;
940 13 : case GDT_Float32:
941 13 : nc_datatype = NC_FLOAT;
942 13 : break;
943 8 : case GDT_Float64:
944 8 : nc_datatype = NC_DOUBLE;
945 8 : break;
946 7 : case GDT_Int64:
947 7 : if (poNCDFDS->eFormat == NCDF_FORMAT_NC4)
948 : {
949 7 : nc_datatype = NC_INT64;
950 : }
951 : else
952 : {
953 0 : if (nBand == 1)
954 0 : CPLError(
955 : CE_Warning, CPLE_AppDefined,
956 : "Unsupported GDAL datatype %s, treat as NC_DOUBLE.",
957 : "Int64");
958 0 : nc_datatype = NC_DOUBLE;
959 0 : eDataType = GDT_Float64;
960 : }
961 7 : break;
962 7 : case GDT_UInt64:
963 7 : if (poNCDFDS->eFormat == NCDF_FORMAT_NC4)
964 : {
965 7 : nc_datatype = NC_UINT64;
966 : }
967 : else
968 : {
969 0 : if (nBand == 1)
970 0 : CPLError(
971 : CE_Warning, CPLE_AppDefined,
972 : "Unsupported GDAL datatype %s, treat as NC_DOUBLE.",
973 : "UInt64");
974 0 : nc_datatype = NC_DOUBLE;
975 0 : eDataType = GDT_Float64;
976 : }
977 7 : break;
978 6 : case GDT_UInt16:
979 6 : if (poNCDFDS->eFormat == NCDF_FORMAT_NC4)
980 : {
981 6 : nc_datatype = NC_USHORT;
982 6 : break;
983 : }
984 : [[fallthrough]];
985 : case GDT_UInt32:
986 6 : if (poNCDFDS->eFormat == NCDF_FORMAT_NC4)
987 : {
988 6 : nc_datatype = NC_UINT;
989 6 : break;
990 : }
991 : [[fallthrough]];
992 : default:
993 16 : if (nBand == 1)
994 8 : CPLError(CE_Warning, CPLE_AppDefined,
995 : "Unsupported GDAL datatype (%d), treat as NC_FLOAT.",
996 8 : static_cast<int>(eDataType));
997 16 : nc_datatype = NC_FLOAT;
998 16 : eDataType = GDT_Float32;
999 16 : break;
1000 : }
1001 :
1002 : // Define the variable if necessary (if nZId == -1).
1003 181 : bool bDefineVar = false;
1004 :
1005 181 : if (nZId == -1)
1006 : {
1007 159 : bDefineVar = true;
1008 :
1009 : // Make sure we are in define mode.
1010 159 : static_cast<netCDFDataset *>(poDS)->SetDefineMode(true);
1011 :
1012 : char szTempPrivate[256 + 1];
1013 159 : const char *pszTemp = nullptr;
1014 159 : if (!pszBandName || EQUAL(pszBandName, ""))
1015 : {
1016 137 : snprintf(szTempPrivate, sizeof(szTempPrivate), "Band%d", nBand);
1017 137 : pszTemp = szTempPrivate;
1018 : }
1019 : else
1020 : {
1021 22 : pszTemp = pszBandName;
1022 : }
1023 :
1024 : int status;
1025 159 : if (nZDim > 2 && paDimIds != nullptr)
1026 : {
1027 5 : status =
1028 5 : nc_def_var(cdfid, pszTemp, nc_datatype, nZDim, paDimIds, &nZId);
1029 : }
1030 : else
1031 : {
1032 154 : int anBandDims[2] = {poNCDFDS->nYDimID, poNCDFDS->nXDimID};
1033 : status =
1034 154 : nc_def_var(cdfid, pszTemp, nc_datatype, 2, anBandDims, &nZId);
1035 : }
1036 159 : NCDF_ERR(status);
1037 159 : CPLDebug("GDAL_netCDF", "nc_def_var(%d,%s,%d) id=%d", cdfid, pszTemp,
1038 : nc_datatype, nZId);
1039 :
1040 159 : if (!pszLongName || EQUAL(pszLongName, ""))
1041 : {
1042 152 : snprintf(szTempPrivate, sizeof(szTempPrivate),
1043 : "GDAL Band Number %d", nBand);
1044 152 : pszTemp = szTempPrivate;
1045 : }
1046 : else
1047 : {
1048 7 : pszTemp = pszLongName;
1049 : }
1050 : status =
1051 159 : nc_put_att_text(cdfid, nZId, CF_LNG_NAME, strlen(pszTemp), pszTemp);
1052 159 : NCDF_ERR(status);
1053 :
1054 159 : poNCDFDS->DefVarDeflate(nZId, true);
1055 : }
1056 :
1057 : // For Byte data add signed/unsigned info.
1058 181 : if (eDataType == GDT_Byte || eDataType == GDT_Int8)
1059 : {
1060 83 : if (bDefineVar)
1061 : {
1062 : // Only add attributes if creating variable.
1063 : // For unsigned NC_BYTE (except NC4 format),
1064 : // add valid_range and _Unsigned ( defined in CF-1 and NUG ).
1065 75 : if (nc_datatype == NC_BYTE && poNCDFDS->eFormat != NCDF_FORMAT_NC4)
1066 : {
1067 72 : CPLDebug("GDAL_netCDF",
1068 : "adding valid_range attributes for Byte Band");
1069 72 : short l_adfValidRange[2] = {0, 0};
1070 : int status;
1071 72 : if (bSignedData || eDataType == GDT_Int8)
1072 : {
1073 7 : l_adfValidRange[0] = -128;
1074 7 : l_adfValidRange[1] = 127;
1075 7 : status =
1076 7 : nc_put_att_text(cdfid, nZId, "_Unsigned", 5, "false");
1077 : }
1078 : else
1079 : {
1080 65 : l_adfValidRange[0] = 0;
1081 65 : l_adfValidRange[1] = 255;
1082 : status =
1083 65 : nc_put_att_text(cdfid, nZId, "_Unsigned", 4, "true");
1084 : }
1085 72 : NCDF_ERR(status);
1086 72 : status = nc_put_att_short(cdfid, nZId, "valid_range", NC_SHORT,
1087 : 2, l_adfValidRange);
1088 72 : NCDF_ERR(status);
1089 : }
1090 : }
1091 : }
1092 :
1093 181 : if (nc_datatype != NC_BYTE && nc_datatype != NC_CHAR &&
1094 101 : nc_datatype != NC_UBYTE)
1095 : {
1096 : // Set default nodata.
1097 98 : bool bIgnored = false;
1098 : double dfNoData =
1099 98 : NCDFGetDefaultNoDataValue(cdfid, nZId, nc_datatype, bIgnored);
1100 : #ifdef NCDF_DEBUG
1101 : CPLDebug("GDAL_netCDF", "SetNoDataValue(%f) default", dfNoData);
1102 : #endif
1103 98 : netCDFRasterBand::SetNoDataValue(dfNoData);
1104 : }
1105 :
1106 181 : SetBlockSize();
1107 : }
1108 :
1109 : /************************************************************************/
1110 : /* ~netCDFRasterBand() */
1111 : /************************************************************************/
1112 :
1113 1300 : netCDFRasterBand::~netCDFRasterBand()
1114 : {
1115 650 : netCDFRasterBand::FlushCache(true);
1116 650 : CPLFree(panBandZPos);
1117 650 : CPLFree(panBandZLev);
1118 1300 : }
1119 :
1120 : /************************************************************************/
1121 : /* GetMetadata() */
1122 : /************************************************************************/
1123 :
1124 47 : char **netCDFRasterBand::GetMetadata(const char *pszDomain)
1125 : {
1126 47 : if (!m_bCreateMetadataFromOtherVarsDone)
1127 47 : CreateMetadataFromOtherVars();
1128 47 : return GDALPamRasterBand::GetMetadata(pszDomain);
1129 : }
1130 :
1131 : /************************************************************************/
1132 : /* GetMetadataItem() */
1133 : /************************************************************************/
1134 :
1135 538 : const char *netCDFRasterBand::GetMetadataItem(const char *pszName,
1136 : const char *pszDomain)
1137 : {
1138 538 : if (!m_bCreateMetadataFromOtherVarsDone &&
1139 522 : STARTS_WITH(pszName, "NETCDF_DIM_") &&
1140 1 : (!pszDomain || pszDomain[0] == 0))
1141 1 : CreateMetadataFromOtherVars();
1142 538 : return GDALPamRasterBand::GetMetadataItem(pszName, pszDomain);
1143 : }
1144 :
1145 : /************************************************************************/
1146 : /* SetMetadataItem() */
1147 : /************************************************************************/
1148 :
1149 7 : CPLErr netCDFRasterBand::SetMetadataItem(const char *pszName,
1150 : const char *pszValue,
1151 : const char *pszDomain)
1152 : {
1153 9 : if (GetAccess() == GA_Update &&
1154 9 : (pszDomain == nullptr || pszDomain[0] == '\0') && pszValue != nullptr)
1155 : {
1156 : // Same logic as in CopyMetadata()
1157 :
1158 2 : const char *const papszIgnoreBand[] = {
1159 : CF_ADD_OFFSET, CF_SCALE_FACTOR, "valid_range", "_Unsigned",
1160 : NCDF_FillValue, "coordinates", nullptr};
1161 : // Do not copy varname, stats, NETCDF_DIM_*, nodata
1162 : // and items in papszIgnoreBand.
1163 6 : if (STARTS_WITH(pszName, "NETCDF_VARNAME") ||
1164 2 : STARTS_WITH(pszName, "STATISTICS_") ||
1165 2 : STARTS_WITH(pszName, "NETCDF_DIM_") ||
1166 2 : STARTS_WITH(pszName, "missing_value") ||
1167 6 : STARTS_WITH(pszName, "_FillValue") ||
1168 2 : CSLFindString(papszIgnoreBand, pszName) != -1)
1169 : {
1170 : // do nothing
1171 : }
1172 : else
1173 : {
1174 2 : cpl::down_cast<netCDFDataset *>(poDS)->SetDefineMode(true);
1175 :
1176 2 : if (!NCDFPutAttr(cdfid, nZId, pszName, pszValue))
1177 2 : return CE_Failure;
1178 : }
1179 : }
1180 :
1181 5 : return GDALPamRasterBand::SetMetadataItem(pszName, pszValue, pszDomain);
1182 : }
1183 :
1184 : /************************************************************************/
1185 : /* SetMetadata() */
1186 : /************************************************************************/
1187 :
1188 2 : CPLErr netCDFRasterBand::SetMetadata(char **papszMD, const char *pszDomain)
1189 : {
1190 4 : if (GetAccess() == GA_Update &&
1191 2 : (pszDomain == nullptr || pszDomain[0] == '\0'))
1192 : {
1193 : // We don't handle metadata item removal for now
1194 4 : for (const char *const *papszIter = papszMD; papszIter && *papszIter;
1195 : ++papszIter)
1196 : {
1197 2 : char *pszName = nullptr;
1198 2 : const char *pszValue = CPLParseNameValue(*papszIter, &pszName);
1199 2 : if (pszName && pszValue)
1200 2 : SetMetadataItem(pszName, pszValue);
1201 2 : CPLFree(pszName);
1202 : }
1203 : }
1204 2 : return GDALPamRasterBand::SetMetadata(papszMD, pszDomain);
1205 : }
1206 :
1207 : /************************************************************************/
1208 : /* GetOffset() */
1209 : /************************************************************************/
1210 49 : double netCDFRasterBand::GetOffset(int *pbSuccess)
1211 : {
1212 49 : if (pbSuccess != nullptr)
1213 44 : *pbSuccess = static_cast<int>(m_bHaveOffset);
1214 :
1215 49 : return m_dfOffset;
1216 : }
1217 :
1218 : /************************************************************************/
1219 : /* SetOffset() */
1220 : /************************************************************************/
1221 1 : CPLErr netCDFRasterBand::SetOffset(double dfNewOffset)
1222 : {
1223 2 : CPLMutexHolderD(&hNCMutex);
1224 :
1225 : // Write value if in update mode.
1226 1 : if (poDS->GetAccess() == GA_Update)
1227 : {
1228 : // Make sure we are in define mode.
1229 1 : static_cast<netCDFDataset *>(poDS)->SetDefineMode(true);
1230 :
1231 1 : const int status = nc_put_att_double(cdfid, nZId, CF_ADD_OFFSET,
1232 : NC_DOUBLE, 1, &dfNewOffset);
1233 :
1234 1 : NCDF_ERR(status);
1235 1 : if (status == NC_NOERR)
1236 : {
1237 1 : SetOffsetNoUpdate(dfNewOffset);
1238 1 : return CE_None;
1239 : }
1240 :
1241 0 : return CE_Failure;
1242 : }
1243 :
1244 0 : SetOffsetNoUpdate(dfNewOffset);
1245 0 : return CE_None;
1246 : }
1247 :
1248 : /************************************************************************/
1249 : /* SetOffsetNoUpdate() */
1250 : /************************************************************************/
1251 17 : void netCDFRasterBand::SetOffsetNoUpdate(double dfVal)
1252 : {
1253 17 : m_dfOffset = dfVal;
1254 17 : m_bHaveOffset = true;
1255 17 : }
1256 :
1257 : /************************************************************************/
1258 : /* GetScale() */
1259 : /************************************************************************/
1260 49 : double netCDFRasterBand::GetScale(int *pbSuccess)
1261 : {
1262 49 : if (pbSuccess != nullptr)
1263 44 : *pbSuccess = static_cast<int>(m_bHaveScale);
1264 :
1265 49 : return m_dfScale;
1266 : }
1267 :
1268 : /************************************************************************/
1269 : /* SetScale() */
1270 : /************************************************************************/
1271 1 : CPLErr netCDFRasterBand::SetScale(double dfNewScale)
1272 : {
1273 2 : CPLMutexHolderD(&hNCMutex);
1274 :
1275 : // Write value if in update mode.
1276 1 : if (poDS->GetAccess() == GA_Update)
1277 : {
1278 : // Make sure we are in define mode.
1279 1 : static_cast<netCDFDataset *>(poDS)->SetDefineMode(true);
1280 :
1281 1 : const int status = nc_put_att_double(cdfid, nZId, CF_SCALE_FACTOR,
1282 : NC_DOUBLE, 1, &dfNewScale);
1283 :
1284 1 : NCDF_ERR(status);
1285 1 : if (status == NC_NOERR)
1286 : {
1287 1 : SetScaleNoUpdate(dfNewScale);
1288 1 : return CE_None;
1289 : }
1290 :
1291 0 : return CE_Failure;
1292 : }
1293 :
1294 0 : SetScaleNoUpdate(dfNewScale);
1295 0 : return CE_None;
1296 : }
1297 :
1298 : /************************************************************************/
1299 : /* SetScaleNoUpdate() */
1300 : /************************************************************************/
1301 21 : void netCDFRasterBand::SetScaleNoUpdate(double dfVal)
1302 : {
1303 21 : m_dfScale = dfVal;
1304 21 : m_bHaveScale = true;
1305 21 : }
1306 :
1307 : /************************************************************************/
1308 : /* GetUnitType() */
1309 : /************************************************************************/
1310 :
1311 21 : const char *netCDFRasterBand::GetUnitType()
1312 :
1313 : {
1314 21 : if (!m_osUnitType.empty())
1315 6 : return m_osUnitType;
1316 :
1317 15 : return GDALRasterBand::GetUnitType();
1318 : }
1319 :
1320 : /************************************************************************/
1321 : /* SetUnitType() */
1322 : /************************************************************************/
1323 :
1324 1 : CPLErr netCDFRasterBand::SetUnitType(const char *pszNewValue)
1325 :
1326 : {
1327 2 : CPLMutexHolderD(&hNCMutex);
1328 :
1329 2 : const std::string osUnitType = (pszNewValue != nullptr ? pszNewValue : "");
1330 :
1331 1 : if (!osUnitType.empty())
1332 : {
1333 : // Write value if in update mode.
1334 1 : if (poDS->GetAccess() == GA_Update)
1335 : {
1336 : // Make sure we are in define mode.
1337 1 : static_cast<netCDFDataset *>(poDS)->SetDefineMode(TRUE);
1338 :
1339 1 : const int status = nc_put_att_text(
1340 : cdfid, nZId, CF_UNITS, osUnitType.size(), osUnitType.c_str());
1341 :
1342 1 : NCDF_ERR(status);
1343 1 : if (status == NC_NOERR)
1344 : {
1345 1 : SetUnitTypeNoUpdate(pszNewValue);
1346 1 : return CE_None;
1347 : }
1348 :
1349 0 : return CE_Failure;
1350 : }
1351 : }
1352 :
1353 0 : SetUnitTypeNoUpdate(pszNewValue);
1354 :
1355 0 : return CE_None;
1356 : }
1357 :
1358 : /************************************************************************/
1359 : /* SetUnitTypeNoUpdate() */
1360 : /************************************************************************/
1361 :
1362 470 : void netCDFRasterBand::SetUnitTypeNoUpdate(const char *pszNewValue)
1363 : {
1364 470 : m_osUnitType = (pszNewValue != nullptr ? pszNewValue : "");
1365 470 : }
1366 :
1367 : /************************************************************************/
1368 : /* GetNoDataValue() */
1369 : /************************************************************************/
1370 :
1371 153 : double netCDFRasterBand::GetNoDataValue(int *pbSuccess)
1372 :
1373 : {
1374 153 : if (m_bNoDataSetAsInt64)
1375 : {
1376 0 : if (pbSuccess)
1377 0 : *pbSuccess = TRUE;
1378 0 : return GDALGetNoDataValueCastToDouble(m_nNodataValueInt64);
1379 : }
1380 :
1381 153 : if (m_bNoDataSetAsUInt64)
1382 : {
1383 0 : if (pbSuccess)
1384 0 : *pbSuccess = TRUE;
1385 0 : return GDALGetNoDataValueCastToDouble(m_nNodataValueUInt64);
1386 : }
1387 :
1388 153 : if (m_bNoDataSet)
1389 : {
1390 118 : if (pbSuccess)
1391 102 : *pbSuccess = TRUE;
1392 118 : return m_dfNoDataValue;
1393 : }
1394 :
1395 35 : return GDALPamRasterBand::GetNoDataValue(pbSuccess);
1396 : }
1397 :
1398 : /************************************************************************/
1399 : /* GetNoDataValueAsInt64() */
1400 : /************************************************************************/
1401 :
1402 4 : int64_t netCDFRasterBand::GetNoDataValueAsInt64(int *pbSuccess)
1403 :
1404 : {
1405 4 : if (m_bNoDataSetAsInt64)
1406 : {
1407 4 : if (pbSuccess)
1408 4 : *pbSuccess = TRUE;
1409 :
1410 4 : return m_nNodataValueInt64;
1411 : }
1412 :
1413 0 : return GDALPamRasterBand::GetNoDataValueAsInt64(pbSuccess);
1414 : }
1415 :
1416 : /************************************************************************/
1417 : /* GetNoDataValueAsUInt64() */
1418 : /************************************************************************/
1419 :
1420 4 : uint64_t netCDFRasterBand::GetNoDataValueAsUInt64(int *pbSuccess)
1421 :
1422 : {
1423 4 : if (m_bNoDataSetAsUInt64)
1424 : {
1425 4 : if (pbSuccess)
1426 4 : *pbSuccess = TRUE;
1427 :
1428 4 : return m_nNodataValueUInt64;
1429 : }
1430 :
1431 0 : return GDALPamRasterBand::GetNoDataValueAsUInt64(pbSuccess);
1432 : }
1433 :
1434 : /************************************************************************/
1435 : /* SetNoDataValue() */
1436 : /************************************************************************/
1437 :
1438 134 : CPLErr netCDFRasterBand::SetNoDataValue(double dfNoData)
1439 :
1440 : {
1441 268 : CPLMutexHolderD(&hNCMutex);
1442 :
1443 : // If already set to new value, don't do anything.
1444 134 : if (m_bNoDataSet && CPLIsEqual(dfNoData, m_dfNoDataValue))
1445 19 : return CE_None;
1446 :
1447 : // Write value if in update mode.
1448 115 : if (poDS->GetAccess() == GA_Update)
1449 : {
1450 : // netcdf-4 does not allow to set _FillValue after leaving define mode,
1451 : // but it is ok if variable has not been written to, so only print
1452 : // debug. See bug #4484.
1453 125 : if (m_bNoDataSet &&
1454 10 : !reinterpret_cast<netCDFDataset *>(poDS)->GetDefineMode())
1455 : {
1456 0 : CPLDebug("GDAL_netCDF",
1457 : "Setting NoDataValue to %.17g (previously set to %.17g) "
1458 : "but file is no longer in define mode (id #%d, band #%d)",
1459 : dfNoData, m_dfNoDataValue, cdfid, nBand);
1460 : }
1461 : #ifdef NCDF_DEBUG
1462 : else
1463 : {
1464 : CPLDebug("GDAL_netCDF",
1465 : "Setting NoDataValue to %.17g (id #%d, band #%d)",
1466 : dfNoData, cdfid, nBand);
1467 : }
1468 : #endif
1469 : // Make sure we are in define mode.
1470 115 : reinterpret_cast<netCDFDataset *>(poDS)->SetDefineMode(true);
1471 :
1472 : int status;
1473 115 : if (eDataType == GDT_Byte)
1474 : {
1475 6 : if (bSignedData)
1476 : {
1477 0 : signed char cNoDataValue = static_cast<signed char>(dfNoData);
1478 0 : status = nc_put_att_schar(cdfid, nZId, NCDF_FillValue,
1479 : nc_datatype, 1, &cNoDataValue);
1480 : }
1481 : else
1482 : {
1483 6 : const unsigned char ucNoDataValue =
1484 6 : static_cast<unsigned char>(dfNoData);
1485 6 : status = nc_put_att_uchar(cdfid, nZId, NCDF_FillValue,
1486 : nc_datatype, 1, &ucNoDataValue);
1487 : }
1488 : }
1489 109 : else if (eDataType == GDT_Int16)
1490 : {
1491 14 : short nsNoDataValue = static_cast<short>(dfNoData);
1492 14 : status = nc_put_att_short(cdfid, nZId, NCDF_FillValue, nc_datatype,
1493 : 1, &nsNoDataValue);
1494 : }
1495 95 : else if (eDataType == GDT_Int32)
1496 : {
1497 27 : int nNoDataValue = static_cast<int>(dfNoData);
1498 27 : status = nc_put_att_int(cdfid, nZId, NCDF_FillValue, nc_datatype, 1,
1499 : &nNoDataValue);
1500 : }
1501 68 : else if (eDataType == GDT_Float32)
1502 : {
1503 31 : float fNoDataValue = static_cast<float>(dfNoData);
1504 31 : status = nc_put_att_float(cdfid, nZId, NCDF_FillValue, nc_datatype,
1505 : 1, &fNoDataValue);
1506 : }
1507 37 : else if (eDataType == GDT_UInt16 &&
1508 6 : reinterpret_cast<netCDFDataset *>(poDS)->eFormat ==
1509 : NCDF_FORMAT_NC4)
1510 : {
1511 6 : unsigned short usNoDataValue =
1512 6 : static_cast<unsigned short>(dfNoData);
1513 6 : status = nc_put_att_ushort(cdfid, nZId, NCDF_FillValue, nc_datatype,
1514 6 : 1, &usNoDataValue);
1515 : }
1516 31 : else if (eDataType == GDT_UInt32 &&
1517 7 : reinterpret_cast<netCDFDataset *>(poDS)->eFormat ==
1518 : NCDF_FORMAT_NC4)
1519 : {
1520 7 : unsigned int unNoDataValue = static_cast<unsigned int>(dfNoData);
1521 7 : status = nc_put_att_uint(cdfid, nZId, NCDF_FillValue, nc_datatype,
1522 7 : 1, &unNoDataValue);
1523 : }
1524 : else
1525 : {
1526 24 : status = nc_put_att_double(cdfid, nZId, NCDF_FillValue, nc_datatype,
1527 : 1, &dfNoData);
1528 : }
1529 :
1530 115 : NCDF_ERR(status);
1531 :
1532 : // Update status if write worked.
1533 115 : if (status == NC_NOERR)
1534 : {
1535 115 : SetNoDataValueNoUpdate(dfNoData);
1536 115 : return CE_None;
1537 : }
1538 :
1539 0 : return CE_Failure;
1540 : }
1541 :
1542 0 : SetNoDataValueNoUpdate(dfNoData);
1543 0 : return CE_None;
1544 : }
1545 :
1546 : /************************************************************************/
1547 : /* SetNoDataValueNoUpdate() */
1548 : /************************************************************************/
1549 :
1550 430 : void netCDFRasterBand::SetNoDataValueNoUpdate(double dfNoData)
1551 : {
1552 430 : m_dfNoDataValue = dfNoData;
1553 430 : m_bNoDataSet = true;
1554 430 : m_bNoDataSetAsInt64 = false;
1555 430 : m_bNoDataSetAsUInt64 = false;
1556 430 : }
1557 :
1558 : /************************************************************************/
1559 : /* SetNoDataValueAsInt64() */
1560 : /************************************************************************/
1561 :
1562 3 : CPLErr netCDFRasterBand::SetNoDataValueAsInt64(int64_t nNoData)
1563 :
1564 : {
1565 6 : CPLMutexHolderD(&hNCMutex);
1566 :
1567 : // If already set to new value, don't do anything.
1568 3 : if (m_bNoDataSetAsInt64 && nNoData == m_nNodataValueInt64)
1569 0 : return CE_None;
1570 :
1571 : // Write value if in update mode.
1572 3 : if (poDS->GetAccess() == GA_Update)
1573 : {
1574 : // netcdf-4 does not allow to set NCDF_FillValue after leaving define mode,
1575 : // but it is ok if variable has not been written to, so only print
1576 : // debug. See bug #4484.
1577 3 : if (m_bNoDataSetAsInt64 &&
1578 0 : !reinterpret_cast<netCDFDataset *>(poDS)->GetDefineMode())
1579 : {
1580 0 : CPLDebug("GDAL_netCDF",
1581 : "Setting NoDataValue to " CPL_FRMT_GIB
1582 : " (previously set to " CPL_FRMT_GIB ") "
1583 : "but file is no longer in define mode (id #%d, band #%d)",
1584 : static_cast<GIntBig>(nNoData),
1585 0 : static_cast<GIntBig>(m_nNodataValueInt64), cdfid, nBand);
1586 : }
1587 : #ifdef NCDF_DEBUG
1588 : else
1589 : {
1590 : CPLDebug("GDAL_netCDF",
1591 : "Setting NoDataValue to " CPL_FRMT_GIB
1592 : " (id #%d, band #%d)",
1593 : static_cast<GIntBig>(nNoData), cdfid, nBand);
1594 : }
1595 : #endif
1596 : // Make sure we are in define mode.
1597 3 : reinterpret_cast<netCDFDataset *>(poDS)->SetDefineMode(true);
1598 :
1599 : int status;
1600 3 : if (eDataType == GDT_Int64 &&
1601 3 : reinterpret_cast<netCDFDataset *>(poDS)->eFormat == NCDF_FORMAT_NC4)
1602 : {
1603 3 : long long tmp = static_cast<long long>(nNoData);
1604 3 : status = nc_put_att_longlong(cdfid, nZId, NCDF_FillValue,
1605 3 : nc_datatype, 1, &tmp);
1606 : }
1607 : else
1608 : {
1609 0 : double dfNoData = static_cast<double>(nNoData);
1610 0 : status = nc_put_att_double(cdfid, nZId, NCDF_FillValue, nc_datatype,
1611 : 1, &dfNoData);
1612 : }
1613 :
1614 3 : NCDF_ERR(status);
1615 :
1616 : // Update status if write worked.
1617 3 : if (status == NC_NOERR)
1618 : {
1619 3 : SetNoDataValueNoUpdate(nNoData);
1620 3 : return CE_None;
1621 : }
1622 :
1623 0 : return CE_Failure;
1624 : }
1625 :
1626 0 : SetNoDataValueNoUpdate(nNoData);
1627 0 : return CE_None;
1628 : }
1629 :
1630 : /************************************************************************/
1631 : /* SetNoDataValueNoUpdate() */
1632 : /************************************************************************/
1633 :
1634 11 : void netCDFRasterBand::SetNoDataValueNoUpdate(int64_t nNoData)
1635 : {
1636 11 : m_nNodataValueInt64 = nNoData;
1637 11 : m_bNoDataSet = false;
1638 11 : m_bNoDataSetAsInt64 = true;
1639 11 : m_bNoDataSetAsUInt64 = false;
1640 11 : }
1641 :
1642 : /************************************************************************/
1643 : /* SetNoDataValueAsUInt64() */
1644 : /************************************************************************/
1645 :
1646 3 : CPLErr netCDFRasterBand::SetNoDataValueAsUInt64(uint64_t nNoData)
1647 :
1648 : {
1649 6 : CPLMutexHolderD(&hNCMutex);
1650 :
1651 : // If already set to new value, don't do anything.
1652 3 : if (m_bNoDataSetAsUInt64 && nNoData == m_nNodataValueUInt64)
1653 0 : return CE_None;
1654 :
1655 : // Write value if in update mode.
1656 3 : if (poDS->GetAccess() == GA_Update)
1657 : {
1658 : // netcdf-4 does not allow to set _FillValue after leaving define mode,
1659 : // but it is ok if variable has not been written to, so only print
1660 : // debug. See bug #4484.
1661 3 : if (m_bNoDataSetAsUInt64 &&
1662 0 : !reinterpret_cast<netCDFDataset *>(poDS)->GetDefineMode())
1663 : {
1664 0 : CPLDebug("GDAL_netCDF",
1665 : "Setting NoDataValue to " CPL_FRMT_GUIB
1666 : " (previously set to " CPL_FRMT_GUIB ") "
1667 : "but file is no longer in define mode (id #%d, band #%d)",
1668 : static_cast<GUIntBig>(nNoData),
1669 0 : static_cast<GUIntBig>(m_nNodataValueUInt64), cdfid, nBand);
1670 : }
1671 : #ifdef NCDF_DEBUG
1672 : else
1673 : {
1674 : CPLDebug("GDAL_netCDF",
1675 : "Setting NoDataValue to " CPL_FRMT_GUIB
1676 : " (id #%d, band #%d)",
1677 : static_cast<GUIntBig>(nNoData), cdfid, nBand);
1678 : }
1679 : #endif
1680 : // Make sure we are in define mode.
1681 3 : reinterpret_cast<netCDFDataset *>(poDS)->SetDefineMode(true);
1682 :
1683 : int status;
1684 3 : if (eDataType == GDT_UInt64 &&
1685 3 : reinterpret_cast<netCDFDataset *>(poDS)->eFormat == NCDF_FORMAT_NC4)
1686 : {
1687 3 : unsigned long long tmp = static_cast<long long>(nNoData);
1688 3 : status = nc_put_att_ulonglong(cdfid, nZId, NCDF_FillValue,
1689 3 : nc_datatype, 1, &tmp);
1690 : }
1691 : else
1692 : {
1693 0 : double dfNoData = static_cast<double>(nNoData);
1694 0 : status = nc_put_att_double(cdfid, nZId, NCDF_FillValue, nc_datatype,
1695 : 1, &dfNoData);
1696 : }
1697 :
1698 3 : NCDF_ERR(status);
1699 :
1700 : // Update status if write worked.
1701 3 : if (status == NC_NOERR)
1702 : {
1703 3 : SetNoDataValueNoUpdate(nNoData);
1704 3 : return CE_None;
1705 : }
1706 :
1707 0 : return CE_Failure;
1708 : }
1709 :
1710 0 : SetNoDataValueNoUpdate(nNoData);
1711 0 : return CE_None;
1712 : }
1713 :
1714 : /************************************************************************/
1715 : /* SetNoDataValueNoUpdate() */
1716 : /************************************************************************/
1717 :
1718 10 : void netCDFRasterBand::SetNoDataValueNoUpdate(uint64_t nNoData)
1719 : {
1720 10 : m_nNodataValueUInt64 = nNoData;
1721 10 : m_bNoDataSet = false;
1722 10 : m_bNoDataSetAsInt64 = false;
1723 10 : m_bNoDataSetAsUInt64 = true;
1724 10 : }
1725 :
1726 : /************************************************************************/
1727 : /* DeleteNoDataValue() */
1728 : /************************************************************************/
1729 :
1730 : #ifdef notdef
1731 : CPLErr netCDFRasterBand::DeleteNoDataValue()
1732 :
1733 : {
1734 : CPLMutexHolderD(&hNCMutex);
1735 :
1736 : if (!bNoDataSet)
1737 : return CE_None;
1738 :
1739 : // Write value if in update mode.
1740 : if (poDS->GetAccess() == GA_Update)
1741 : {
1742 : // Make sure we are in define mode.
1743 : static_cast<netCDFDataset *>(poDS)->SetDefineMode(true);
1744 :
1745 : status = nc_del_att(cdfid, nZId, NCDF_FillValue);
1746 :
1747 : NCDF_ERR(status);
1748 :
1749 : // Update status if write worked.
1750 : if (status == NC_NOERR)
1751 : {
1752 : dfNoDataValue = 0.0;
1753 : bNoDataSet = false;
1754 : return CE_None;
1755 : }
1756 :
1757 : return CE_Failure;
1758 : }
1759 :
1760 : dfNoDataValue = 0.0;
1761 : bNoDataSet = false;
1762 : return CE_None;
1763 : }
1764 : #endif
1765 :
1766 : /************************************************************************/
1767 : /* SerializeToXML() */
1768 : /************************************************************************/
1769 :
1770 5 : CPLXMLNode *netCDFRasterBand::SerializeToXML(const char * /* pszUnused */)
1771 : {
1772 : // Overridden from GDALPamDataset to add only band histogram
1773 : // and statistics. See bug #4244.
1774 5 : if (psPam == nullptr)
1775 0 : return nullptr;
1776 :
1777 : // Setup root node and attributes.
1778 : CPLXMLNode *psTree =
1779 5 : CPLCreateXMLNode(nullptr, CXT_Element, "PAMRasterBand");
1780 :
1781 5 : if (GetBand() > 0)
1782 : {
1783 10 : CPLString oFmt;
1784 5 : CPLSetXMLValue(psTree, "#band", oFmt.Printf("%d", GetBand()));
1785 : }
1786 :
1787 : // Histograms.
1788 5 : if (psPam->psSavedHistograms != nullptr)
1789 1 : CPLAddXMLChild(psTree, CPLCloneXMLTree(psPam->psSavedHistograms));
1790 :
1791 : // Metadata (statistics only).
1792 5 : GDALMultiDomainMetadata oMDMDStats;
1793 5 : const char *papszMDStats[] = {"STATISTICS_MINIMUM", "STATISTICS_MAXIMUM",
1794 : "STATISTICS_MEAN", "STATISTICS_STDDEV",
1795 : nullptr};
1796 25 : for (int i = 0; i < CSLCount(papszMDStats); i++)
1797 : {
1798 20 : const char *pszMDI = GetMetadataItem(papszMDStats[i]);
1799 20 : if (pszMDI)
1800 4 : oMDMDStats.SetMetadataItem(papszMDStats[i], pszMDI);
1801 : }
1802 5 : CPLXMLNode *psMD = oMDMDStats.Serialize();
1803 :
1804 5 : if (psMD != nullptr)
1805 : {
1806 1 : if (psMD->psChild == nullptr)
1807 0 : CPLDestroyXMLNode(psMD);
1808 : else
1809 1 : CPLAddXMLChild(psTree, psMD);
1810 : }
1811 :
1812 : // We don't want to return anything if we had no metadata to attach.
1813 5 : if (psTree->psChild == nullptr || psTree->psChild->psNext == nullptr)
1814 : {
1815 3 : CPLDestroyXMLNode(psTree);
1816 3 : psTree = nullptr;
1817 : }
1818 :
1819 5 : return psTree;
1820 : }
1821 :
1822 : /************************************************************************/
1823 : /* Get1DVariableIndexedByDimension() */
1824 : /************************************************************************/
1825 :
1826 79 : static int Get1DVariableIndexedByDimension(int cdfid, int nDimId,
1827 : const char *pszDimName,
1828 : bool bVerboseError, int *pnGroupID)
1829 : {
1830 79 : *pnGroupID = -1;
1831 79 : int nVarID = -1;
1832 : // First try to find a variable whose name is identical to the dimension
1833 : // name, and check that it is indeed indexed by this dimension
1834 79 : if (NCDFResolveVar(cdfid, pszDimName, pnGroupID, &nVarID) == CE_None)
1835 : {
1836 65 : int nDimCountOfVariable = 0;
1837 65 : nc_inq_varndims(*pnGroupID, nVarID, &nDimCountOfVariable);
1838 65 : if (nDimCountOfVariable == 1)
1839 : {
1840 65 : int nDimIdOfVariable = -1;
1841 65 : nc_inq_vardimid(*pnGroupID, nVarID, &nDimIdOfVariable);
1842 65 : if (nDimIdOfVariable == nDimId)
1843 : {
1844 65 : return nVarID;
1845 : }
1846 : }
1847 : }
1848 :
1849 : // Otherwise iterate over the variables to find potential candidates
1850 : // TODO: should be modified to search also in other groups using the same
1851 : // logic than in NCDFResolveVar(), but maybe not needed if it's a
1852 : // very rare case? and I think this is not CF compliant.
1853 14 : int nvars = 0;
1854 14 : CPL_IGNORE_RET_VAL(nc_inq(cdfid, nullptr, &nvars, nullptr, nullptr));
1855 :
1856 14 : int nCountCandidateVars = 0;
1857 14 : int nCandidateVarID = -1;
1858 65 : for (int k = 0; k < nvars; k++)
1859 : {
1860 51 : int nDimCountOfVariable = 0;
1861 51 : nc_inq_varndims(cdfid, k, &nDimCountOfVariable);
1862 51 : if (nDimCountOfVariable == 1)
1863 : {
1864 27 : int nDimIdOfVariable = -1;
1865 27 : nc_inq_vardimid(cdfid, k, &nDimIdOfVariable);
1866 27 : if (nDimIdOfVariable == nDimId)
1867 : {
1868 7 : nCountCandidateVars++;
1869 7 : nCandidateVarID = k;
1870 : }
1871 : }
1872 : }
1873 14 : if (nCountCandidateVars > 1)
1874 : {
1875 1 : if (bVerboseError)
1876 : {
1877 1 : CPLError(CE_Warning, CPLE_AppDefined,
1878 : "Several 1D variables are indexed by dimension %s",
1879 : pszDimName);
1880 : }
1881 1 : *pnGroupID = -1;
1882 1 : return -1;
1883 : }
1884 13 : else if (nCandidateVarID < 0)
1885 : {
1886 8 : if (bVerboseError)
1887 : {
1888 8 : CPLError(CE_Warning, CPLE_AppDefined,
1889 : "No 1D variable is indexed by dimension %s", pszDimName);
1890 : }
1891 : }
1892 13 : *pnGroupID = cdfid;
1893 13 : return nCandidateVarID;
1894 : }
1895 :
1896 : /************************************************************************/
1897 : /* CreateMetadataFromAttributes() */
1898 : /************************************************************************/
1899 :
1900 469 : void netCDFRasterBand::CreateMetadataFromAttributes()
1901 : {
1902 469 : char szVarName[NC_MAX_NAME + 1] = {};
1903 469 : int status = nc_inq_varname(cdfid, nZId, szVarName);
1904 469 : NCDF_ERR(status);
1905 :
1906 469 : GDALPamRasterBand::SetMetadataItem("NETCDF_VARNAME", szVarName);
1907 :
1908 : // Get attribute metadata.
1909 469 : int nAtt = 0;
1910 469 : NCDF_ERR(nc_inq_varnatts(cdfid, nZId, &nAtt));
1911 :
1912 1977 : for (int i = 0; i < nAtt; i++)
1913 : {
1914 1508 : char szMetaName[NC_MAX_NAME + 1] = {};
1915 1508 : status = nc_inq_attname(cdfid, nZId, i, szMetaName);
1916 1508 : if (status != NC_NOERR)
1917 12 : continue;
1918 :
1919 1508 : if (GDALPamRasterBand::GetMetadataItem(szMetaName) != nullptr)
1920 : {
1921 12 : continue;
1922 : }
1923 :
1924 1496 : char *pszMetaValue = nullptr;
1925 1496 : if (NCDFGetAttr(cdfid, nZId, szMetaName, &pszMetaValue) == CE_None)
1926 : {
1927 1496 : GDALPamRasterBand::SetMetadataItem(szMetaName, pszMetaValue);
1928 : }
1929 : else
1930 : {
1931 0 : CPLDebug("GDAL_netCDF", "invalid Band metadata %s", szMetaName);
1932 : }
1933 :
1934 1496 : if (pszMetaValue)
1935 : {
1936 1496 : CPLFree(pszMetaValue);
1937 1496 : pszMetaValue = nullptr;
1938 : }
1939 : }
1940 469 : }
1941 :
1942 : /************************************************************************/
1943 : /* CreateMetadataFromOtherVars() */
1944 : /************************************************************************/
1945 :
1946 48 : void netCDFRasterBand::CreateMetadataFromOtherVars()
1947 :
1948 : {
1949 48 : CPLAssert(!m_bCreateMetadataFromOtherVarsDone);
1950 48 : m_bCreateMetadataFromOtherVarsDone = true;
1951 :
1952 48 : netCDFDataset *l_poDS = reinterpret_cast<netCDFDataset *>(poDS);
1953 48 : const int nPamFlagsBackup = l_poDS->nPamFlags;
1954 :
1955 : // Compute all dimensions from Band number and save in Metadata.
1956 48 : int nd = 0;
1957 48 : nc_inq_varndims(cdfid, nZId, &nd);
1958 : // Compute multidimention band position.
1959 : //
1960 : // BandPosition = (Total - sum(PastBandLevels) - 1)/sum(remainingLevels)
1961 : // if Data[2,3,4,x,y]
1962 : //
1963 : // BandPos0 = (nBand) / (3*4)
1964 : // BandPos1 = (nBand - BandPos0*(3*4)) / (4)
1965 : // BandPos2 = (nBand - BandPos0*(3*4)) % (4)
1966 :
1967 48 : int Sum = 1;
1968 48 : if (nd == 3)
1969 : {
1970 5 : Sum *= panBandZLev[0];
1971 : }
1972 :
1973 : // Loop over non-spatial dimensions.
1974 48 : int Taken = 0;
1975 :
1976 88 : for (int i = 0; i < nd - 2; i++)
1977 : {
1978 : int result;
1979 40 : if (i != nd - 2 - 1)
1980 : {
1981 18 : Sum = 1;
1982 37 : for (int j = i + 1; j < nd - 2; j++)
1983 : {
1984 19 : Sum *= panBandZLev[j];
1985 : }
1986 18 : result = static_cast<int>((nLevel - Taken) / Sum);
1987 : }
1988 : else
1989 : {
1990 22 : result = static_cast<int>((nLevel - Taken) % Sum);
1991 : }
1992 :
1993 40 : char szName[NC_MAX_NAME + 1] = {};
1994 40 : snprintf(szName, sizeof(szName), "%s",
1995 40 : l_poDS->papszDimName[l_poDS->m_anDimIds[panBandZPos[i]]]);
1996 :
1997 : char szMetaName[NC_MAX_NAME + 1 + 32];
1998 40 : snprintf(szMetaName, sizeof(szMetaName), "NETCDF_DIM_%s", szName);
1999 :
2000 40 : const int nGroupID = l_poDS->m_anExtraDimGroupIds[i];
2001 40 : const int nVarID = l_poDS->m_anExtraDimVarIds[i];
2002 40 : if (nVarID < 0)
2003 : {
2004 2 : GDALPamRasterBand::SetMetadataItem(szMetaName,
2005 : CPLSPrintf("%d", result + 1));
2006 : }
2007 : else
2008 : {
2009 : // TODO: Make sure all the status checks make sense.
2010 :
2011 38 : nc_type nVarType = NC_NAT;
2012 38 : /* status = */ nc_inq_vartype(nGroupID, nVarID, &nVarType);
2013 :
2014 38 : int nDims = 0;
2015 38 : /* status = */ nc_inq_varndims(nGroupID, nVarID, &nDims);
2016 :
2017 38 : char szMetaTemp[256] = {};
2018 38 : if (nDims == 1)
2019 : {
2020 38 : size_t count[1] = {1};
2021 38 : size_t start[1] = {static_cast<size_t>(result)};
2022 :
2023 38 : switch (nVarType)
2024 : {
2025 0 : case NC_BYTE:
2026 : // TODO: Check for signed/unsigned byte.
2027 : signed char cData;
2028 0 : /* status = */ nc_get_vara_schar(nGroupID, nVarID,
2029 : start, count, &cData);
2030 0 : snprintf(szMetaTemp, sizeof(szMetaTemp), "%d", cData);
2031 0 : break;
2032 0 : case NC_SHORT:
2033 : short sData;
2034 0 : /* status = */ nc_get_vara_short(nGroupID, nVarID,
2035 : start, count, &sData);
2036 0 : snprintf(szMetaTemp, sizeof(szMetaTemp), "%d", sData);
2037 0 : break;
2038 19 : case NC_INT:
2039 : {
2040 : int nData;
2041 19 : /* status = */ nc_get_vara_int(nGroupID, nVarID, start,
2042 : count, &nData);
2043 19 : snprintf(szMetaTemp, sizeof(szMetaTemp), "%d", nData);
2044 19 : break;
2045 : }
2046 0 : case NC_FLOAT:
2047 : float fData;
2048 0 : /* status = */ nc_get_vara_float(nGroupID, nVarID,
2049 : start, count, &fData);
2050 0 : CPLsnprintf(szMetaTemp, sizeof(szMetaTemp), "%.8g",
2051 : fData);
2052 0 : break;
2053 18 : case NC_DOUBLE:
2054 : double dfData;
2055 18 : /* status = */ nc_get_vara_double(
2056 : nGroupID, nVarID, start, count, &dfData);
2057 18 : CPLsnprintf(szMetaTemp, sizeof(szMetaTemp), "%.16g",
2058 : dfData);
2059 18 : break;
2060 0 : case NC_UBYTE:
2061 : unsigned char ucData;
2062 0 : /* status = */ nc_get_vara_uchar(nGroupID, nVarID,
2063 : start, count, &ucData);
2064 0 : snprintf(szMetaTemp, sizeof(szMetaTemp), "%u", ucData);
2065 0 : break;
2066 0 : case NC_USHORT:
2067 : unsigned short usData;
2068 0 : /* status = */ nc_get_vara_ushort(
2069 : nGroupID, nVarID, start, count, &usData);
2070 0 : snprintf(szMetaTemp, sizeof(szMetaTemp), "%u", usData);
2071 0 : break;
2072 0 : case NC_UINT:
2073 : {
2074 : unsigned int unData;
2075 0 : /* status = */ nc_get_vara_uint(nGroupID, nVarID, start,
2076 : count, &unData);
2077 0 : snprintf(szMetaTemp, sizeof(szMetaTemp), "%u", unData);
2078 0 : break;
2079 : }
2080 1 : case NC_INT64:
2081 : {
2082 : long long nData;
2083 1 : /* status = */ nc_get_vara_longlong(
2084 : nGroupID, nVarID, start, count, &nData);
2085 1 : snprintf(szMetaTemp, sizeof(szMetaTemp), CPL_FRMT_GIB,
2086 : nData);
2087 1 : break;
2088 : }
2089 0 : case NC_UINT64:
2090 : {
2091 : unsigned long long unData;
2092 0 : /* status = */ nc_get_vara_ulonglong(
2093 : nGroupID, nVarID, start, count, &unData);
2094 0 : snprintf(szMetaTemp, sizeof(szMetaTemp), CPL_FRMT_GUIB,
2095 : unData);
2096 0 : break;
2097 : }
2098 0 : default:
2099 0 : CPLDebug("GDAL_netCDF", "invalid dim %s, type=%d",
2100 : szMetaTemp, nVarType);
2101 0 : break;
2102 : }
2103 : }
2104 : else
2105 : {
2106 0 : snprintf(szMetaTemp, sizeof(szMetaTemp), "%d", result + 1);
2107 : }
2108 :
2109 : // Save dimension value.
2110 : // NOTE: removed #original_units as not part of CF-1.
2111 :
2112 38 : GDALPamRasterBand::SetMetadataItem(szMetaName, szMetaTemp);
2113 : }
2114 :
2115 : // Avoid int32 overflow. Perhaps something more sensible to do here ?
2116 40 : if (result > 0 && Sum > INT_MAX / result)
2117 0 : break;
2118 40 : if (Taken > INT_MAX - result * Sum)
2119 0 : break;
2120 :
2121 40 : Taken += result * Sum;
2122 : } // End loop non-spatial dimensions.
2123 :
2124 48 : l_poDS->nPamFlags = nPamFlagsBackup;
2125 48 : }
2126 :
2127 : /************************************************************************/
2128 : /* CheckData() */
2129 : /************************************************************************/
2130 : template <class T>
2131 5731 : void netCDFRasterBand::CheckData(void *pImage, void *pImageNC,
2132 : size_t nTmpBlockXSize, size_t nTmpBlockYSize,
2133 : bool bCheckIsNan)
2134 : {
2135 5731 : CPLAssert(pImage != nullptr && pImageNC != nullptr);
2136 :
2137 : // If this block is not a full block (in the x axis), we need to re-arrange
2138 : // the data this is because partial blocks are not arranged the same way in
2139 : // netcdf and gdal.
2140 5731 : if (nTmpBlockXSize != static_cast<size_t>(nBlockXSize))
2141 : {
2142 6 : T *ptrWrite = static_cast<T *>(pImage);
2143 6 : T *ptrRead = static_cast<T *>(pImageNC);
2144 29 : for (size_t j = 0; j < nTmpBlockYSize;
2145 23 : j++, ptrWrite += nBlockXSize, ptrRead += nTmpBlockXSize)
2146 : {
2147 23 : memmove(ptrWrite, ptrRead, nTmpBlockXSize * sizeof(T));
2148 : }
2149 : }
2150 :
2151 : // Is valid data checking needed or requested?
2152 5731 : if (bValidRangeValid || bCheckIsNan)
2153 : {
2154 1265 : T *ptrImage = static_cast<T *>(pImage);
2155 2584 : for (size_t j = 0; j < nTmpBlockYSize; j++)
2156 : {
2157 : // k moves along the gdal block, skipping the out-of-range pixels.
2158 1319 : size_t k = j * nBlockXSize;
2159 96938 : for (size_t i = 0; i < nTmpBlockXSize; i++, k++)
2160 : {
2161 : // Check for nodata and nan.
2162 95619 : if (CPLIsEqual((double)ptrImage[k], m_dfNoDataValue))
2163 6301 : continue;
2164 89318 : if (bCheckIsNan && std::isnan((double)ptrImage[k]))
2165 : {
2166 5737 : ptrImage[k] = (T)m_dfNoDataValue;
2167 5737 : continue;
2168 : }
2169 : // Check for valid_range.
2170 83581 : if (bValidRangeValid)
2171 : {
2172 40986 : if (((adfValidRange[0] != m_dfNoDataValue) &&
2173 40986 : (ptrImage[k] < (T)adfValidRange[0])) ||
2174 40983 : ((adfValidRange[1] != m_dfNoDataValue) &&
2175 40983 : (ptrImage[k] > (T)adfValidRange[1])))
2176 : {
2177 4 : ptrImage[k] = (T)m_dfNoDataValue;
2178 : }
2179 : }
2180 : }
2181 : }
2182 : }
2183 :
2184 : // If minimum longitude is > 180, subtract 360 from all.
2185 : // If not, disable checking for further calls (check just once).
2186 : // Only check first and last block elements since lon must be monotonic.
2187 5731 : const bool bIsSigned = std::numeric_limits<T>::is_signed;
2188 5419 : if (bCheckLongitude && bIsSigned &&
2189 9 : !CPLIsEqual((double)((T *)pImage)[0], m_dfNoDataValue) &&
2190 8 : !CPLIsEqual((double)((T *)pImage)[nTmpBlockXSize - 1],
2191 2714 : m_dfNoDataValue) &&
2192 8 : std::min(((T *)pImage)[0], ((T *)pImage)[nTmpBlockXSize - 1]) > 180.0)
2193 : {
2194 0 : T *ptrImage = static_cast<T *>(pImage);
2195 0 : for (size_t j = 0; j < nTmpBlockYSize; j++)
2196 : {
2197 0 : size_t k = j * nBlockXSize;
2198 0 : for (size_t i = 0; i < nTmpBlockXSize; i++, k++)
2199 : {
2200 0 : if (!CPLIsEqual((double)ptrImage[k], m_dfNoDataValue))
2201 0 : ptrImage[k] = static_cast<T>(ptrImage[k] - 360);
2202 : }
2203 : }
2204 : }
2205 : else
2206 : {
2207 5731 : bCheckLongitude = false;
2208 : }
2209 5731 : }
2210 :
2211 : /************************************************************************/
2212 : /* CheckDataCpx() */
2213 : /************************************************************************/
2214 : template <class T>
2215 25 : void netCDFRasterBand::CheckDataCpx(void *pImage, void *pImageNC,
2216 : size_t nTmpBlockXSize,
2217 : size_t nTmpBlockYSize, bool bCheckIsNan)
2218 : {
2219 25 : CPLAssert(pImage != nullptr && pImageNC != nullptr);
2220 :
2221 : // If this block is not a full block (in the x axis), we need to re-arrange
2222 : // the data this is because partial blocks are not arranged the same way in
2223 : // netcdf and gdal.
2224 25 : if (nTmpBlockXSize != static_cast<size_t>(nBlockXSize))
2225 : {
2226 0 : T *ptrWrite = static_cast<T *>(pImage);
2227 0 : T *ptrRead = static_cast<T *>(pImageNC);
2228 0 : for (size_t j = 0; j < nTmpBlockYSize; j++,
2229 0 : ptrWrite += (2 * nBlockXSize),
2230 0 : ptrRead += (2 * nTmpBlockXSize))
2231 : {
2232 0 : memmove(ptrWrite, ptrRead, nTmpBlockXSize * sizeof(T) * 2);
2233 : }
2234 : }
2235 :
2236 : // Is valid data checking needed or requested?
2237 25 : if (bValidRangeValid || bCheckIsNan)
2238 : {
2239 0 : T *ptrImage = static_cast<T *>(pImage);
2240 0 : for (size_t j = 0; j < nTmpBlockYSize; j++)
2241 : {
2242 : // k moves along the gdal block, skipping the out-of-range pixels.
2243 0 : size_t k = 2 * j * nBlockXSize;
2244 0 : for (size_t i = 0; i < (2 * nTmpBlockXSize); i++, k++)
2245 : {
2246 : // Check for nodata and nan.
2247 0 : if (CPLIsEqual((double)ptrImage[k], m_dfNoDataValue))
2248 0 : continue;
2249 0 : if (bCheckIsNan && std::isnan((double)ptrImage[k]))
2250 : {
2251 0 : ptrImage[k] = (T)m_dfNoDataValue;
2252 0 : continue;
2253 : }
2254 : // Check for valid_range.
2255 0 : if (bValidRangeValid)
2256 : {
2257 0 : if (((adfValidRange[0] != m_dfNoDataValue) &&
2258 0 : (ptrImage[k] < (T)adfValidRange[0])) ||
2259 0 : ((adfValidRange[1] != m_dfNoDataValue) &&
2260 0 : (ptrImage[k] > (T)adfValidRange[1])))
2261 : {
2262 0 : ptrImage[k] = (T)m_dfNoDataValue;
2263 : }
2264 : }
2265 : }
2266 : }
2267 : }
2268 25 : }
2269 :
2270 : /************************************************************************/
2271 : /* FetchNetcdfChunk() */
2272 : /************************************************************************/
2273 :
2274 5756 : bool netCDFRasterBand::FetchNetcdfChunk(size_t xstart, size_t ystart,
2275 : void *pImage)
2276 : {
2277 5756 : size_t start[MAX_NC_DIMS] = {};
2278 5756 : size_t edge[MAX_NC_DIMS] = {};
2279 :
2280 5756 : start[nBandXPos] = xstart;
2281 5756 : edge[nBandXPos] = nBlockXSize;
2282 5756 : if ((start[nBandXPos] + edge[nBandXPos]) > (size_t)nRasterXSize)
2283 6 : edge[nBandXPos] = nRasterXSize - start[nBandXPos];
2284 5756 : if (nBandYPos >= 0)
2285 : {
2286 5752 : start[nBandYPos] = ystart;
2287 5752 : edge[nBandYPos] = nBlockYSize;
2288 5752 : if ((start[nBandYPos] + edge[nBandYPos]) > (size_t)nRasterYSize)
2289 4 : edge[nBandYPos] = nRasterYSize - start[nBandYPos];
2290 : }
2291 5756 : const size_t nYChunkSize = nBandYPos < 0 ? 1 : edge[nBandYPos];
2292 :
2293 : #ifdef NCDF_DEBUG
2294 : CPLDebug("GDAL_netCDF", "start={%ld,%ld} edge={%ld,%ld} bBottomUp=%d",
2295 : start[nBandXPos], nBandYPos < 0 ? 0 : start[nBandYPos],
2296 : edge[nBandXPos], nYChunkSize, ((netCDFDataset *)poDS)->bBottomUp);
2297 : #endif
2298 :
2299 5756 : int nd = 0;
2300 5756 : nc_inq_varndims(cdfid, nZId, &nd);
2301 5756 : if (nd == 3)
2302 : {
2303 1078 : start[panBandZPos[0]] = nLevel; // z
2304 1078 : edge[panBandZPos[0]] = 1;
2305 : }
2306 :
2307 : // Compute multidimention band position.
2308 : //
2309 : // BandPosition = (Total - sum(PastBandLevels) - 1)/sum(remainingLevels)
2310 : // if Data[2,3,4,x,y]
2311 : //
2312 : // BandPos0 = (nBand) / (3*4)
2313 : // BandPos1 = (nBand - (3*4)) / (4)
2314 : // BandPos2 = (nBand - (3*4)) % (4)
2315 5756 : if (nd > 3)
2316 : {
2317 160 : int Sum = -1;
2318 160 : int Taken = 0;
2319 480 : for (int i = 0; i < nd - 2; i++)
2320 : {
2321 320 : if (i != nd - 2 - 1)
2322 : {
2323 160 : Sum = 1;
2324 320 : for (int j = i + 1; j < nd - 2; j++)
2325 : {
2326 160 : Sum *= panBandZLev[j];
2327 : }
2328 160 : start[panBandZPos[i]] = (int)((nLevel - Taken) / Sum);
2329 160 : edge[panBandZPos[i]] = 1;
2330 : }
2331 : else
2332 : {
2333 160 : start[panBandZPos[i]] = (int)((nLevel - Taken) % Sum);
2334 160 : edge[panBandZPos[i]] = 1;
2335 : }
2336 320 : Taken += static_cast<int>(start[panBandZPos[i]]) * Sum;
2337 : }
2338 : }
2339 :
2340 : // Make sure we are in data mode.
2341 5756 : static_cast<netCDFDataset *>(poDS)->SetDefineMode(false);
2342 :
2343 : // If this block is not a full block in the x axis, we need to
2344 : // re-arrange the data because partial blocks are not arranged the
2345 : // same way in netcdf and gdal, so we first we read the netcdf data at
2346 : // the end of the gdal block buffer then re-arrange rows in CheckData().
2347 5756 : void *pImageNC = pImage;
2348 5756 : if (edge[nBandXPos] != static_cast<size_t>(nBlockXSize))
2349 : {
2350 6 : pImageNC = static_cast<GByte *>(pImage) +
2351 6 : ((static_cast<size_t>(nBlockXSize) * nBlockYSize -
2352 12 : edge[nBandXPos] * nYChunkSize) *
2353 6 : (GDALGetDataTypeSize(eDataType) / 8));
2354 : }
2355 :
2356 : // Read data according to type.
2357 : int status;
2358 5756 : if (eDataType == GDT_Byte)
2359 : {
2360 3004 : if (bSignedData)
2361 : {
2362 0 : status = nc_get_vara_schar(cdfid, nZId, start, edge,
2363 : static_cast<signed char *>(pImageNC));
2364 0 : if (status == NC_NOERR)
2365 0 : CheckData<signed char>(pImage, pImageNC, edge[nBandXPos],
2366 : nYChunkSize, false);
2367 : }
2368 : else
2369 : {
2370 3004 : status = nc_get_vara_uchar(cdfid, nZId, start, edge,
2371 : static_cast<unsigned char *>(pImageNC));
2372 3004 : if (status == NC_NOERR)
2373 3004 : CheckData<unsigned char>(pImage, pImageNC, edge[nBandXPos],
2374 : nYChunkSize, false);
2375 : }
2376 : }
2377 2752 : else if (eDataType == GDT_Int8)
2378 : {
2379 60 : status = nc_get_vara_schar(cdfid, nZId, start, edge,
2380 : static_cast<signed char *>(pImageNC));
2381 60 : if (status == NC_NOERR)
2382 60 : CheckData<signed char>(pImage, pImageNC, edge[nBandXPos],
2383 : nYChunkSize, false);
2384 : }
2385 2692 : else if (nc_datatype == NC_SHORT)
2386 : {
2387 465 : status = nc_get_vara_short(cdfid, nZId, start, edge,
2388 : static_cast<short *>(pImageNC));
2389 465 : if (status == NC_NOERR)
2390 : {
2391 465 : if (eDataType == GDT_Int16)
2392 : {
2393 462 : CheckData<GInt16>(pImage, pImageNC, edge[nBandXPos],
2394 : nYChunkSize, false);
2395 : }
2396 : else
2397 : {
2398 3 : CheckData<GUInt16>(pImage, pImageNC, edge[nBandXPos],
2399 : nYChunkSize, false);
2400 : }
2401 : }
2402 : }
2403 2227 : else if (eDataType == GDT_Int32)
2404 : {
2405 : #if SIZEOF_UNSIGNED_LONG == 4
2406 : status = nc_get_vara_long(cdfid, nZId, start, edge,
2407 : static_cast<long *>(pImageNC));
2408 : if (status == NC_NOERR)
2409 : CheckData<long>(pImage, pImageNC, edge[nBandXPos], nYChunkSize,
2410 : false);
2411 : #else
2412 912 : status = nc_get_vara_int(cdfid, nZId, start, edge,
2413 : static_cast<int *>(pImageNC));
2414 912 : if (status == NC_NOERR)
2415 912 : CheckData<int>(pImage, pImageNC, edge[nBandXPos], nYChunkSize,
2416 : false);
2417 : #endif
2418 : }
2419 1315 : else if (eDataType == GDT_Float32)
2420 : {
2421 1178 : status = nc_get_vara_float(cdfid, nZId, start, edge,
2422 : static_cast<float *>(pImageNC));
2423 1178 : if (status == NC_NOERR)
2424 1178 : CheckData<float>(pImage, pImageNC, edge[nBandXPos], nYChunkSize,
2425 : true);
2426 : }
2427 137 : else if (eDataType == GDT_Float64)
2428 : {
2429 86 : status = nc_get_vara_double(cdfid, nZId, start, edge,
2430 : static_cast<double *>(pImageNC));
2431 86 : if (status == NC_NOERR)
2432 86 : CheckData<double>(pImage, pImageNC, edge[nBandXPos], nYChunkSize,
2433 : true);
2434 : }
2435 51 : else if (eDataType == GDT_UInt16)
2436 : {
2437 6 : status = nc_get_vara_ushort(cdfid, nZId, start, edge,
2438 : static_cast<unsigned short *>(pImageNC));
2439 6 : if (status == NC_NOERR)
2440 6 : CheckData<unsigned short>(pImage, pImageNC, edge[nBandXPos],
2441 : nYChunkSize, false);
2442 : }
2443 45 : else if (eDataType == GDT_UInt32)
2444 : {
2445 6 : status = nc_get_vara_uint(cdfid, nZId, start, edge,
2446 : static_cast<unsigned int *>(pImageNC));
2447 6 : if (status == NC_NOERR)
2448 6 : CheckData<unsigned int>(pImage, pImageNC, edge[nBandXPos],
2449 : nYChunkSize, false);
2450 : }
2451 39 : else if (eDataType == GDT_Int64)
2452 : {
2453 7 : status = nc_get_vara_longlong(cdfid, nZId, start, edge,
2454 : static_cast<long long *>(pImageNC));
2455 7 : if (status == NC_NOERR)
2456 7 : CheckData<std::int64_t>(pImage, pImageNC, edge[nBandXPos],
2457 : nYChunkSize, false);
2458 : }
2459 32 : else if (eDataType == GDT_UInt64)
2460 : {
2461 : status =
2462 7 : nc_get_vara_ulonglong(cdfid, nZId, start, edge,
2463 : static_cast<unsigned long long *>(pImageNC));
2464 7 : if (status == NC_NOERR)
2465 7 : CheckData<std::uint64_t>(pImage, pImageNC, edge[nBandXPos],
2466 : nYChunkSize, false);
2467 : }
2468 25 : else if (eDataType == GDT_CInt16)
2469 : {
2470 0 : status = nc_get_vara(cdfid, nZId, start, edge, pImageNC);
2471 0 : if (status == NC_NOERR)
2472 0 : CheckDataCpx<short>(pImage, pImageNC, edge[nBandXPos], nYChunkSize,
2473 : false);
2474 : }
2475 25 : else if (eDataType == GDT_CInt32)
2476 : {
2477 0 : status = nc_get_vara(cdfid, nZId, start, edge, pImageNC);
2478 0 : if (status == NC_NOERR)
2479 0 : CheckDataCpx<int>(pImage, pImageNC, edge[nBandXPos], nYChunkSize,
2480 : false);
2481 : }
2482 25 : else if (eDataType == GDT_CFloat32)
2483 : {
2484 20 : status = nc_get_vara(cdfid, nZId, start, edge, pImageNC);
2485 20 : if (status == NC_NOERR)
2486 20 : CheckDataCpx<float>(pImage, pImageNC, edge[nBandXPos], nYChunkSize,
2487 : false);
2488 : }
2489 5 : else if (eDataType == GDT_CFloat64)
2490 : {
2491 5 : status = nc_get_vara(cdfid, nZId, start, edge, pImageNC);
2492 5 : if (status == NC_NOERR)
2493 5 : CheckDataCpx<double>(pImage, pImageNC, edge[nBandXPos], nYChunkSize,
2494 : false);
2495 : }
2496 :
2497 : else
2498 0 : status = NC_EBADTYPE;
2499 :
2500 5756 : if (status != NC_NOERR)
2501 : {
2502 0 : CPLError(CE_Failure, CPLE_AppDefined,
2503 : "netCDF chunk fetch failed: #%d (%s)", status,
2504 : nc_strerror(status));
2505 0 : return false;
2506 : }
2507 5756 : return true;
2508 : }
2509 :
2510 : /************************************************************************/
2511 : /* IReadBlock() */
2512 : /************************************************************************/
2513 :
2514 5756 : CPLErr netCDFRasterBand::IReadBlock(int nBlockXOff, int nBlockYOff,
2515 : void *pImage)
2516 :
2517 : {
2518 11512 : CPLMutexHolderD(&hNCMutex);
2519 :
2520 : // Locate X, Y and Z position in the array.
2521 :
2522 5756 : size_t xstart = static_cast<size_t>(nBlockXOff) * nBlockXSize;
2523 5756 : size_t ystart = 0;
2524 :
2525 : // Check y order.
2526 5756 : if (nBandYPos >= 0)
2527 : {
2528 5752 : auto poGDS = static_cast<netCDFDataset *>(poDS);
2529 5752 : if (poGDS->bBottomUp)
2530 : {
2531 4837 : if (nBlockYSize == 1)
2532 : {
2533 4824 : ystart = nRasterYSize - 1 - nBlockYOff;
2534 : }
2535 : else
2536 : {
2537 : // in GDAL space
2538 13 : ystart = static_cast<size_t>(nBlockYOff) * nBlockYSize;
2539 : const size_t yend =
2540 26 : std::min(ystart + nBlockYSize - 1,
2541 13 : static_cast<size_t>(nRasterYSize - 1));
2542 : // in netCDF space
2543 13 : const size_t nFirstChunkLine = nRasterYSize - 1 - yend;
2544 13 : const size_t nLastChunkLine = nRasterYSize - 1 - ystart;
2545 13 : const size_t nFirstChunkBlock = nFirstChunkLine / nBlockYSize;
2546 13 : const size_t nLastChunkBlock = nLastChunkLine / nBlockYSize;
2547 :
2548 : const auto firstKey = netCDFDataset::ChunkKey(
2549 13 : nBlockXOff, nFirstChunkBlock, nBand);
2550 : const auto secondKey =
2551 13 : netCDFDataset::ChunkKey(nBlockXOff, nLastChunkBlock, nBand);
2552 :
2553 : // Retrieve data from the one or 2 needed netCDF chunks
2554 13 : std::shared_ptr<std::vector<GByte>> firstChunk;
2555 13 : std::shared_ptr<std::vector<GByte>> secondChunk;
2556 13 : if (poGDS->poChunkCache)
2557 : {
2558 13 : poGDS->poChunkCache->tryGet(firstKey, firstChunk);
2559 13 : if (firstKey != secondKey)
2560 6 : poGDS->poChunkCache->tryGet(secondKey, secondChunk);
2561 : }
2562 : const size_t nChunkLineSize =
2563 13 : static_cast<size_t>(GDALGetDataTypeSizeBytes(eDataType)) *
2564 13 : nBlockXSize;
2565 13 : const size_t nChunkSize = nChunkLineSize * nBlockYSize;
2566 13 : if (!firstChunk)
2567 : {
2568 11 : firstChunk.reset(new std::vector<GByte>(nChunkSize));
2569 11 : if (!FetchNetcdfChunk(xstart,
2570 11 : nFirstChunkBlock * nBlockYSize,
2571 11 : firstChunk.get()->data()))
2572 0 : return CE_Failure;
2573 11 : if (poGDS->poChunkCache)
2574 11 : poGDS->poChunkCache->insert(firstKey, firstChunk);
2575 : }
2576 13 : if (!secondChunk && firstKey != secondKey)
2577 : {
2578 2 : secondChunk.reset(new std::vector<GByte>(nChunkSize));
2579 2 : if (!FetchNetcdfChunk(xstart, nLastChunkBlock * nBlockYSize,
2580 2 : secondChunk.get()->data()))
2581 0 : return CE_Failure;
2582 2 : if (poGDS->poChunkCache)
2583 2 : poGDS->poChunkCache->insert(secondKey, secondChunk);
2584 : }
2585 :
2586 : // Assemble netCDF chunks into GDAL block
2587 13 : GByte *pabyImage = static_cast<GByte *>(pImage);
2588 13 : const size_t nFirstChunkBlockLine =
2589 13 : nFirstChunkBlock * nBlockYSize;
2590 13 : const size_t nLastChunkBlockLine =
2591 13 : nLastChunkBlock * nBlockYSize;
2592 146 : for (size_t iLine = ystart; iLine <= yend; iLine++)
2593 : {
2594 133 : const size_t nLineFromBottom = nRasterYSize - 1 - iLine;
2595 133 : const size_t nChunkY = nLineFromBottom / nBlockYSize;
2596 133 : if (nChunkY == nFirstChunkBlock)
2597 : {
2598 121 : memcpy(pabyImage + nChunkLineSize * (iLine - ystart),
2599 121 : firstChunk.get()->data() +
2600 121 : (nLineFromBottom - nFirstChunkBlockLine) *
2601 : nChunkLineSize,
2602 : nChunkLineSize);
2603 : }
2604 : else
2605 : {
2606 12 : CPLAssert(nChunkY == nLastChunkBlock);
2607 12 : assert(secondChunk);
2608 12 : memcpy(pabyImage + nChunkLineSize * (iLine - ystart),
2609 12 : secondChunk.get()->data() +
2610 12 : (nLineFromBottom - nLastChunkBlockLine) *
2611 : nChunkLineSize,
2612 : nChunkLineSize);
2613 : }
2614 : }
2615 13 : return CE_None;
2616 : }
2617 : }
2618 : else
2619 : {
2620 915 : ystart = static_cast<size_t>(nBlockYOff) * nBlockYSize;
2621 : }
2622 : }
2623 :
2624 5743 : return FetchNetcdfChunk(xstart, ystart, pImage) ? CE_None : CE_Failure;
2625 : }
2626 :
2627 : /************************************************************************/
2628 : /* IWriteBlock() */
2629 : /************************************************************************/
2630 :
2631 2801 : CPLErr netCDFRasterBand::IWriteBlock(CPL_UNUSED int nBlockXOff, int nBlockYOff,
2632 : void *pImage)
2633 : {
2634 5602 : CPLMutexHolderD(&hNCMutex);
2635 :
2636 : #ifdef NCDF_DEBUG
2637 : if (nBlockYOff == 0 || (nBlockYOff == nRasterYSize - 1))
2638 : CPLDebug("GDAL_netCDF",
2639 : "netCDFRasterBand::IWriteBlock( %d, %d, ...) nBand=%d",
2640 : nBlockXOff, nBlockYOff, nBand);
2641 : #endif
2642 :
2643 2801 : int nd = 0;
2644 2801 : nc_inq_varndims(cdfid, nZId, &nd);
2645 :
2646 : // Locate X, Y and Z position in the array.
2647 :
2648 : size_t start[MAX_NC_DIMS];
2649 2801 : memset(start, 0, sizeof(start));
2650 2801 : start[nBandXPos] = static_cast<size_t>(nBlockXOff) * nBlockXSize;
2651 :
2652 : // check y order.
2653 2801 : if (static_cast<netCDFDataset *>(poDS)->bBottomUp)
2654 : {
2655 2777 : if (nBlockYSize == 1)
2656 : {
2657 2777 : start[nBandYPos] = nRasterYSize - 1 - nBlockYOff;
2658 : }
2659 : else
2660 : {
2661 0 : CPLError(CE_Failure, CPLE_AppDefined,
2662 : "nBlockYSize = %d, only 1 supported when "
2663 : "writing bottom-up dataset",
2664 : nBlockYSize);
2665 0 : return CE_Failure;
2666 : }
2667 : }
2668 : else
2669 : {
2670 24 : start[nBandYPos] = static_cast<size_t>(nBlockYOff) * nBlockYSize; // y
2671 : }
2672 :
2673 2801 : size_t edge[MAX_NC_DIMS] = {};
2674 :
2675 2801 : edge[nBandXPos] = nBlockXSize;
2676 2801 : if ((start[nBandXPos] + edge[nBandXPos]) > (size_t)nRasterXSize)
2677 0 : edge[nBandXPos] = nRasterXSize - start[nBandXPos];
2678 2801 : edge[nBandYPos] = nBlockYSize;
2679 2801 : if ((start[nBandYPos] + edge[nBandYPos]) > (size_t)nRasterYSize)
2680 0 : edge[nBandYPos] = nRasterYSize - start[nBandYPos];
2681 :
2682 2801 : if (nd == 3)
2683 : {
2684 610 : start[panBandZPos[0]] = nLevel; // z
2685 610 : edge[panBandZPos[0]] = 1;
2686 : }
2687 :
2688 : // Compute multidimention band position.
2689 : //
2690 : // BandPosition = (Total - sum(PastBandLevels) - 1)/sum(remainingLevels)
2691 : // if Data[2,3,4,x,y]
2692 : //
2693 : // BandPos0 = (nBand) / (3*4)
2694 : // BandPos1 = (nBand - (3*4)) / (4)
2695 : // BandPos2 = (nBand - (3*4)) % (4)
2696 2801 : if (nd > 3)
2697 : {
2698 178 : int Sum = -1;
2699 178 : int Taken = 0;
2700 534 : for (int i = 0; i < nd - 2; i++)
2701 : {
2702 356 : if (i != nd - 2 - 1)
2703 : {
2704 178 : Sum = 1;
2705 356 : for (int j = i + 1; j < nd - 2; j++)
2706 : {
2707 178 : Sum *= panBandZLev[j];
2708 : }
2709 178 : start[panBandZPos[i]] = (int)((nLevel - Taken) / Sum);
2710 178 : edge[panBandZPos[i]] = 1;
2711 : }
2712 : else
2713 : {
2714 178 : start[panBandZPos[i]] = (int)((nLevel - Taken) % Sum);
2715 178 : edge[panBandZPos[i]] = 1;
2716 : }
2717 356 : Taken += static_cast<int>(start[panBandZPos[i]]) * Sum;
2718 : }
2719 : }
2720 :
2721 : // Make sure we are in data mode.
2722 2801 : static_cast<netCDFDataset *>(poDS)->SetDefineMode(false);
2723 :
2724 : // Copy data according to type.
2725 2801 : int status = 0;
2726 2801 : if (eDataType == GDT_Byte)
2727 : {
2728 2242 : if (bSignedData)
2729 0 : status = nc_put_vara_schar(cdfid, nZId, start, edge,
2730 : static_cast<signed char *>(pImage));
2731 : else
2732 2242 : status = nc_put_vara_uchar(cdfid, nZId, start, edge,
2733 : static_cast<unsigned char *>(pImage));
2734 : }
2735 559 : else if (eDataType == GDT_Int8)
2736 : {
2737 40 : status = nc_put_vara_schar(cdfid, nZId, start, edge,
2738 : static_cast<signed char *>(pImage));
2739 : }
2740 519 : else if (nc_datatype == NC_SHORT)
2741 : {
2742 101 : status = nc_put_vara_short(cdfid, nZId, start, edge,
2743 : static_cast<short *>(pImage));
2744 : }
2745 418 : else if (eDataType == GDT_Int32)
2746 : {
2747 210 : status = nc_put_vara_int(cdfid, nZId, start, edge,
2748 : static_cast<int *>(pImage));
2749 : }
2750 208 : else if (eDataType == GDT_Float32)
2751 : {
2752 128 : status = nc_put_vara_float(cdfid, nZId, start, edge,
2753 : static_cast<float *>(pImage));
2754 : }
2755 80 : else if (eDataType == GDT_Float64)
2756 : {
2757 50 : status = nc_put_vara_double(cdfid, nZId, start, edge,
2758 : static_cast<double *>(pImage));
2759 : }
2760 30 : else if (eDataType == GDT_UInt16 &&
2761 12 : static_cast<netCDFDataset *>(poDS)->eFormat == NCDF_FORMAT_NC4)
2762 : {
2763 12 : status = nc_put_vara_ushort(cdfid, nZId, start, edge,
2764 : static_cast<unsigned short *>(pImage));
2765 : }
2766 18 : else if (eDataType == GDT_UInt32 &&
2767 12 : static_cast<netCDFDataset *>(poDS)->eFormat == NCDF_FORMAT_NC4)
2768 : {
2769 12 : status = nc_put_vara_uint(cdfid, nZId, start, edge,
2770 : static_cast<unsigned int *>(pImage));
2771 : }
2772 6 : else if (eDataType == GDT_UInt64 &&
2773 3 : static_cast<netCDFDataset *>(poDS)->eFormat == NCDF_FORMAT_NC4)
2774 : {
2775 3 : status =
2776 3 : nc_put_vara_ulonglong(cdfid, nZId, start, edge,
2777 : static_cast<unsigned long long *>(pImage));
2778 : }
2779 3 : else if (eDataType == GDT_Int64 &&
2780 3 : static_cast<netCDFDataset *>(poDS)->eFormat == NCDF_FORMAT_NC4)
2781 : {
2782 3 : status = nc_put_vara_longlong(cdfid, nZId, start, edge,
2783 : static_cast<long long *>(pImage));
2784 : }
2785 : else
2786 : {
2787 0 : CPLError(CE_Failure, CPLE_NotSupported,
2788 : "The NetCDF driver does not support GDAL data type %d",
2789 0 : eDataType);
2790 0 : status = NC_EBADTYPE;
2791 : }
2792 2801 : NCDF_ERR(status);
2793 :
2794 2801 : if (status != NC_NOERR)
2795 : {
2796 0 : CPLError(CE_Failure, CPLE_AppDefined,
2797 : "netCDF scanline write failed: %s", nc_strerror(status));
2798 0 : return CE_Failure;
2799 : }
2800 :
2801 2801 : return CE_None;
2802 : }
2803 :
2804 : /************************************************************************/
2805 : /* ==================================================================== */
2806 : /* netCDFDataset */
2807 : /* ==================================================================== */
2808 : /************************************************************************/
2809 :
2810 : /************************************************************************/
2811 : /* netCDFDataset() */
2812 : /************************************************************************/
2813 :
2814 999 : netCDFDataset::netCDFDataset()
2815 : :
2816 : // Basic dataset vars.
2817 : #ifdef ENABLE_NCDUMP
2818 : bFileToDestroyAtClosing(false),
2819 : #endif
2820 : cdfid(-1), nSubDatasets(0), papszSubDatasets(nullptr),
2821 : papszMetadata(nullptr), bBottomUp(true), eFormat(NCDF_FORMAT_NONE),
2822 : bIsGdalFile(false), bIsGdalCfFile(false), pszCFProjection(nullptr),
2823 : pszCFCoordinates(nullptr), nCFVersion(1.6), bSGSupport(false),
2824 999 : eMultipleLayerBehavior(SINGLE_LAYER), logCount(0), vcdf(this, cdfid),
2825 999 : GeometryScribe(vcdf, this->generateLogName()),
2826 999 : FieldScribe(vcdf, this->generateLogName()),
2827 1998 : bufManager(CPLGetUsablePhysicalRAM() / 5),
2828 :
2829 : // projection/GT.
2830 : nXDimID(-1), nYDimID(-1), bIsProjected(false),
2831 : bIsGeographic(false), // Can be not projected, and also not geographic
2832 : // State vars.
2833 : bDefineMode(true), bAddedGridMappingRef(false),
2834 :
2835 : // Create vars.
2836 : papszCreationOptions(nullptr), eCompress(NCDF_COMPRESS_NONE),
2837 : nZLevel(NCDF_DEFLATE_LEVEL), bChunking(false), nCreateMode(NC_CLOBBER),
2838 2997 : bSignedData(true)
2839 : {
2840 999 : m_oSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
2841 :
2842 : // Projection/GT.
2843 999 : m_adfGeoTransform[0] = 0.0;
2844 999 : m_adfGeoTransform[1] = 1.0;
2845 999 : m_adfGeoTransform[2] = 0.0;
2846 999 : m_adfGeoTransform[3] = 0.0;
2847 999 : m_adfGeoTransform[4] = 0.0;
2848 999 : m_adfGeoTransform[5] = 1.0;
2849 :
2850 : // Set buffers
2851 999 : bufManager.addBuffer(&(GeometryScribe.getMemBuffer()));
2852 999 : bufManager.addBuffer(&(FieldScribe.getMemBuffer()));
2853 999 : }
2854 :
2855 : /************************************************************************/
2856 : /* ~netCDFDataset() */
2857 : /************************************************************************/
2858 :
2859 1924 : netCDFDataset::~netCDFDataset()
2860 :
2861 : {
2862 999 : netCDFDataset::Close();
2863 1924 : }
2864 :
2865 : /************************************************************************/
2866 : /* Close() */
2867 : /************************************************************************/
2868 :
2869 1741 : CPLErr netCDFDataset::Close()
2870 : {
2871 1741 : CPLErr eErr = CE_None;
2872 1741 : if (nOpenFlags != OPEN_FLAGS_CLOSED)
2873 : {
2874 1998 : CPLMutexHolderD(&hNCMutex);
2875 :
2876 : #ifdef NCDF_DEBUG
2877 : CPLDebug("GDAL_netCDF",
2878 : "netCDFDataset::~netCDFDataset(), cdfid=%d filename=%s", cdfid,
2879 : osFilename.c_str());
2880 : #endif
2881 :
2882 : // Write data related to geotransform
2883 1230 : if (GetAccess() == GA_Update && !m_bAddedProjectionVarsData &&
2884 231 : (m_bHasProjection || m_bHasGeoTransform))
2885 : {
2886 : // Ensure projection is written if GeoTransform OR Projection are
2887 : // missing.
2888 37 : if (!m_bAddedProjectionVarsDefs)
2889 : {
2890 2 : AddProjectionVars(true, nullptr, nullptr);
2891 : }
2892 37 : AddProjectionVars(false, nullptr, nullptr);
2893 : }
2894 :
2895 999 : if (netCDFDataset::FlushCache(true) != CE_None)
2896 0 : eErr = CE_Failure;
2897 :
2898 999 : if (GetAccess() == GA_Update && !SGCommitPendingTransaction())
2899 0 : eErr = CE_Failure;
2900 :
2901 1001 : for (size_t i = 0; i < apoVectorDatasets.size(); i++)
2902 2 : delete apoVectorDatasets[i];
2903 :
2904 : // Make sure projection variable is written to band variable.
2905 999 : if (GetAccess() == GA_Update && !bAddedGridMappingRef)
2906 : {
2907 247 : if (!AddGridMappingRef())
2908 0 : eErr = CE_Failure;
2909 : }
2910 :
2911 999 : CSLDestroy(papszMetadata);
2912 999 : CSLDestroy(papszSubDatasets);
2913 999 : CSLDestroy(papszCreationOptions);
2914 :
2915 999 : CPLFree(pszCFProjection);
2916 :
2917 999 : if (cdfid > 0)
2918 : {
2919 : #ifdef NCDF_DEBUG
2920 : CPLDebug("GDAL_netCDF", "calling nc_close( %d)", cdfid);
2921 : #endif
2922 654 : int status = GDAL_nc_close(cdfid);
2923 : #ifdef ENABLE_UFFD
2924 654 : NETCDF_UFFD_UNMAP(pCtx);
2925 : #endif
2926 654 : NCDF_ERR(status);
2927 654 : if (status != NC_NOERR)
2928 0 : eErr = CE_Failure;
2929 : }
2930 :
2931 999 : if (fpVSIMEM)
2932 15 : VSIFCloseL(fpVSIMEM);
2933 :
2934 : #ifdef ENABLE_NCDUMP
2935 999 : if (bFileToDestroyAtClosing)
2936 0 : VSIUnlink(osFilename);
2937 : #endif
2938 :
2939 999 : if (GDALPamDataset::Close() != CE_None)
2940 0 : eErr = CE_Failure;
2941 : }
2942 1741 : return eErr;
2943 : }
2944 :
2945 : /************************************************************************/
2946 : /* SetDefineMode() */
2947 : /************************************************************************/
2948 10618 : bool netCDFDataset::SetDefineMode(bool bNewDefineMode)
2949 : {
2950 : // Do nothing if already in new define mode
2951 : // or if dataset is in read-only mode or if dataset is true NC4 dataset.
2952 11174 : if (bDefineMode == bNewDefineMode || GetAccess() == GA_ReadOnly ||
2953 556 : eFormat == NCDF_FORMAT_NC4)
2954 10209 : return true;
2955 :
2956 409 : CPLDebug("GDAL_netCDF", "SetDefineMode(%d) old=%d",
2957 409 : static_cast<int>(bNewDefineMode), static_cast<int>(bDefineMode));
2958 :
2959 409 : bDefineMode = bNewDefineMode;
2960 :
2961 : int status;
2962 409 : if (bDefineMode)
2963 142 : status = nc_redef(cdfid);
2964 : else
2965 267 : status = nc_enddef(cdfid);
2966 :
2967 409 : NCDF_ERR(status);
2968 409 : return status == NC_NOERR;
2969 : }
2970 :
2971 : /************************************************************************/
2972 : /* GetMetadataDomainList() */
2973 : /************************************************************************/
2974 :
2975 27 : char **netCDFDataset::GetMetadataDomainList()
2976 : {
2977 27 : char **papszDomains = BuildMetadataDomainList(
2978 : GDALDataset::GetMetadataDomainList(), TRUE, "SUBDATASETS", nullptr);
2979 28 : for (const auto &kv : m_oMapDomainToJSon)
2980 1 : papszDomains = CSLAddString(papszDomains, ("json:" + kv.first).c_str());
2981 27 : return papszDomains;
2982 : }
2983 :
2984 : /************************************************************************/
2985 : /* GetMetadata() */
2986 : /************************************************************************/
2987 359 : char **netCDFDataset::GetMetadata(const char *pszDomain)
2988 : {
2989 359 : if (pszDomain != nullptr && STARTS_WITH_CI(pszDomain, "SUBDATASETS"))
2990 37 : return papszSubDatasets;
2991 :
2992 322 : if (pszDomain != nullptr && STARTS_WITH(pszDomain, "json:"))
2993 : {
2994 1 : auto iter = m_oMapDomainToJSon.find(pszDomain + strlen("json:"));
2995 1 : if (iter != m_oMapDomainToJSon.end())
2996 1 : return iter->second.List();
2997 : }
2998 :
2999 321 : return GDALDataset::GetMetadata(pszDomain);
3000 : }
3001 :
3002 : /************************************************************************/
3003 : /* SetMetadataItem() */
3004 : /************************************************************************/
3005 :
3006 43 : CPLErr netCDFDataset::SetMetadataItem(const char *pszName, const char *pszValue,
3007 : const char *pszDomain)
3008 : {
3009 85 : if (GetAccess() == GA_Update &&
3010 85 : (pszDomain == nullptr || pszDomain[0] == '\0') && pszValue != nullptr)
3011 : {
3012 42 : std::string osName(pszName);
3013 :
3014 : // Same logic as in CopyMetadata()
3015 42 : if (STARTS_WITH(osName.c_str(), "NC_GLOBAL#"))
3016 8 : osName = osName.substr(strlen("NC_GLOBAL#"));
3017 34 : else if (strchr(osName.c_str(), '#') == nullptr)
3018 5 : osName = "GDAL_" + osName;
3019 :
3020 84 : if (STARTS_WITH(osName.c_str(), "NETCDF_DIM_") ||
3021 42 : strchr(osName.c_str(), '#') != nullptr)
3022 : {
3023 : // do nothing
3024 29 : return CE_None;
3025 : }
3026 : else
3027 : {
3028 13 : SetDefineMode(true);
3029 :
3030 13 : if (!NCDFPutAttr(cdfid, NC_GLOBAL, osName.c_str(), pszValue))
3031 13 : return CE_Failure;
3032 : }
3033 : }
3034 :
3035 1 : return GDALPamDataset::SetMetadataItem(pszName, pszValue, pszDomain);
3036 : }
3037 :
3038 : /************************************************************************/
3039 : /* SetMetadata() */
3040 : /************************************************************************/
3041 :
3042 8 : CPLErr netCDFDataset::SetMetadata(char **papszMD, const char *pszDomain)
3043 : {
3044 13 : if (GetAccess() == GA_Update &&
3045 5 : (pszDomain == nullptr || pszDomain[0] == '\0'))
3046 : {
3047 : // We don't handle metadata item removal for now
3048 50 : for (const char *const *papszIter = papszMD; papszIter && *papszIter;
3049 : ++papszIter)
3050 : {
3051 42 : char *pszName = nullptr;
3052 42 : const char *pszValue = CPLParseNameValue(*papszIter, &pszName);
3053 42 : if (pszName && pszValue)
3054 42 : SetMetadataItem(pszName, pszValue);
3055 42 : CPLFree(pszName);
3056 : }
3057 8 : return CE_None;
3058 : }
3059 0 : return GDALPamDataset::SetMetadata(papszMD, pszDomain);
3060 : }
3061 :
3062 : /************************************************************************/
3063 : /* GetSpatialRef() */
3064 : /************************************************************************/
3065 :
3066 181 : const OGRSpatialReference *netCDFDataset::GetSpatialRef() const
3067 : {
3068 181 : if (m_bHasProjection)
3069 72 : return m_oSRS.IsEmpty() ? nullptr : &m_oSRS;
3070 :
3071 109 : return GDALPamDataset::GetSpatialRef();
3072 : }
3073 :
3074 : /************************************************************************/
3075 : /* FetchCopyParam() */
3076 : /************************************************************************/
3077 :
3078 312 : double netCDFDataset::FetchCopyParam(const char *pszGridMappingValue,
3079 : const char *pszParam, double dfDefault,
3080 : bool *pbFound)
3081 :
3082 : {
3083 : char *pszTemp =
3084 312 : CPLStrdup(CPLSPrintf("%s#%s", pszGridMappingValue, pszParam));
3085 312 : const char *pszValue = CSLFetchNameValue(papszMetadata, pszTemp);
3086 312 : CPLFree(pszTemp);
3087 :
3088 312 : if (pbFound)
3089 : {
3090 312 : *pbFound = (pszValue != nullptr);
3091 : }
3092 :
3093 312 : if (pszValue)
3094 : {
3095 0 : return CPLAtofM(pszValue);
3096 : }
3097 :
3098 312 : return dfDefault;
3099 : }
3100 :
3101 : /************************************************************************/
3102 : /* FetchStandardParallels() */
3103 : /************************************************************************/
3104 :
3105 : std::vector<std::string>
3106 0 : netCDFDataset::FetchStandardParallels(const char *pszGridMappingValue)
3107 : {
3108 : // cf-1.0 tags
3109 0 : const char *pszValue = FetchAttr(pszGridMappingValue, CF_PP_STD_PARALLEL);
3110 :
3111 0 : std::vector<std::string> ret;
3112 0 : if (pszValue != nullptr)
3113 : {
3114 0 : CPLStringList aosValues;
3115 0 : if (pszValue[0] != '{' &&
3116 0 : CPLString(pszValue).Trim().find(' ') != std::string::npos)
3117 : {
3118 : // Some files like
3119 : // ftp://data.knmi.nl/download/KNW-NetCDF-3D/1.0/noversion/2013/11/14/KNW-1.0_H37-ERA_NL_20131114.nc
3120 : // do not use standard formatting for arrays, but just space
3121 : // separated syntax
3122 0 : aosValues = CSLTokenizeString2(pszValue, " ", 0);
3123 : }
3124 : else
3125 : {
3126 0 : aosValues = NCDFTokenizeArray(pszValue);
3127 : }
3128 0 : for (int i = 0; i < aosValues.size(); i++)
3129 : {
3130 0 : ret.push_back(aosValues[i]);
3131 : }
3132 : }
3133 : // Try gdal tags.
3134 : else
3135 : {
3136 0 : pszValue = FetchAttr(pszGridMappingValue, CF_PP_STD_PARALLEL_1);
3137 :
3138 0 : if (pszValue != nullptr)
3139 0 : ret.push_back(pszValue);
3140 :
3141 0 : pszValue = FetchAttr(pszGridMappingValue, CF_PP_STD_PARALLEL_2);
3142 :
3143 0 : if (pszValue != nullptr)
3144 0 : ret.push_back(pszValue);
3145 : }
3146 :
3147 0 : return ret;
3148 : }
3149 :
3150 : /************************************************************************/
3151 : /* FetchAttr() */
3152 : /************************************************************************/
3153 :
3154 3677 : const char *netCDFDataset::FetchAttr(const char *pszVarFullName,
3155 : const char *pszAttr)
3156 :
3157 : {
3158 3677 : char *pszKey = CPLStrdup(CPLSPrintf("%s#%s", pszVarFullName, pszAttr));
3159 3677 : const char *pszValue = CSLFetchNameValue(papszMetadata, pszKey);
3160 3677 : CPLFree(pszKey);
3161 3677 : return pszValue;
3162 : }
3163 :
3164 2436 : const char *netCDFDataset::FetchAttr(int nGroupId, int nVarId,
3165 : const char *pszAttr)
3166 :
3167 : {
3168 2436 : char *pszVarFullName = nullptr;
3169 2436 : NCDFGetVarFullName(nGroupId, nVarId, &pszVarFullName);
3170 2436 : const char *pszValue = FetchAttr(pszVarFullName, pszAttr);
3171 2436 : CPLFree(pszVarFullName);
3172 2436 : return pszValue;
3173 : }
3174 :
3175 : /************************************************************************/
3176 : /* IsDifferenceBelow() */
3177 : /************************************************************************/
3178 :
3179 1073 : static bool IsDifferenceBelow(double dfA, double dfB, double dfError)
3180 : {
3181 1073 : const double dfAbsDiff = fabs(dfA - dfB);
3182 1073 : return dfAbsDiff <= dfError;
3183 : }
3184 :
3185 : /************************************************************************/
3186 : /* SetProjectionFromVar() */
3187 : /************************************************************************/
3188 511 : void netCDFDataset::SetProjectionFromVar(
3189 : int nGroupId, int nVarId, bool bReadSRSOnly, const char *pszGivenGM,
3190 : std::string *returnProjStr, nccfdriver::SGeometry_Reader *sg,
3191 : std::vector<std::string> *paosRemovedMDItems)
3192 : {
3193 511 : bool bGotGeogCS = false;
3194 511 : bool bGotCfSRS = false;
3195 511 : bool bGotCfWktSRS = false;
3196 511 : bool bGotGdalSRS = false;
3197 511 : bool bGotCfGT = false;
3198 511 : bool bGotGdalGT = false;
3199 :
3200 : // These values from CF metadata.
3201 511 : OGRSpatialReference oSRS;
3202 511 : oSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
3203 511 : size_t xdim = nRasterXSize;
3204 511 : size_t ydim = nRasterYSize;
3205 :
3206 : // These values from GDAL metadata.
3207 511 : const char *pszWKT = nullptr;
3208 511 : const char *pszGeoTransform = nullptr;
3209 :
3210 511 : netCDFDataset *poDS = this; // Perhaps this should be removed for clarity.
3211 :
3212 511 : CPLDebug("GDAL_netCDF", "\n=====\nSetProjectionFromVar( %d, %d)", nGroupId,
3213 : nVarId);
3214 :
3215 : // Get x/y range information.
3216 :
3217 : // Temp variables to use in SetGeoTransform() and SetProjection().
3218 511 : double adfTempGeoTransform[6] = {0.0, 1.0, 0.0, 0.0, 0.0, 1.0};
3219 :
3220 : // Look for grid_mapping metadata.
3221 511 : const char *pszValue = pszGivenGM;
3222 511 : CPLString osTmpGridMapping; // let is in this outer scope as pszValue may
3223 : // point to it
3224 511 : if (pszValue == nullptr)
3225 : {
3226 468 : pszValue = FetchAttr(nGroupId, nVarId, CF_GRD_MAPPING);
3227 468 : if (pszValue && strchr(pszValue, ':') && strchr(pszValue, ' '))
3228 : {
3229 : // Expanded form of grid_mapping
3230 : // e.g. "crsOSGB: x y crsWGS84: lat lon"
3231 : // Pickup the grid_mapping whose coordinates are dimensions of the
3232 : // variable
3233 6 : CPLStringList aosTokens(CSLTokenizeString2(pszValue, " ", 0));
3234 3 : if ((aosTokens.size() % 3) == 0)
3235 : {
3236 3 : for (int i = 0; i < aosTokens.size() / 3; i++)
3237 : {
3238 3 : if (CSLFindString(poDS->papszDimName,
3239 9 : aosTokens[3 * i + 1]) >= 0 &&
3240 3 : CSLFindString(poDS->papszDimName,
3241 3 : aosTokens[3 * i + 2]) >= 0)
3242 : {
3243 3 : osTmpGridMapping = aosTokens[3 * i];
3244 6 : if (!osTmpGridMapping.empty() &&
3245 3 : osTmpGridMapping.back() == ':')
3246 : {
3247 3 : osTmpGridMapping.resize(osTmpGridMapping.size() -
3248 : 1);
3249 : }
3250 3 : pszValue = osTmpGridMapping.c_str();
3251 3 : break;
3252 : }
3253 : }
3254 : }
3255 : }
3256 : }
3257 511 : char *pszGridMappingValue = CPLStrdup(pszValue ? pszValue : "");
3258 :
3259 511 : if (!EQUAL(pszGridMappingValue, ""))
3260 : {
3261 : // Read grid_mapping metadata.
3262 217 : int nProjGroupID = -1;
3263 217 : int nProjVarID = -1;
3264 217 : if (NCDFResolveVar(nGroupId, pszGridMappingValue, &nProjGroupID,
3265 217 : &nProjVarID) == CE_None)
3266 : {
3267 216 : poDS->ReadAttributes(nProjGroupID, nProjVarID);
3268 :
3269 : // Look for GDAL spatial_ref and GeoTransform within grid_mapping.
3270 216 : CPLFree(pszGridMappingValue);
3271 216 : pszGridMappingValue = nullptr;
3272 216 : NCDFGetVarFullName(nProjGroupID, nProjVarID, &pszGridMappingValue);
3273 216 : if (pszGridMappingValue)
3274 : {
3275 216 : CPLDebug("GDAL_netCDF", "got grid_mapping %s",
3276 : pszGridMappingValue);
3277 216 : pszWKT = FetchAttr(pszGridMappingValue, NCDF_SPATIAL_REF);
3278 216 : if (!pszWKT)
3279 : {
3280 34 : pszWKT = FetchAttr(pszGridMappingValue, NCDF_CRS_WKT);
3281 : }
3282 : else
3283 : {
3284 182 : bGotGdalSRS = true;
3285 182 : CPLDebug("GDAL_netCDF", "setting WKT from GDAL");
3286 : }
3287 216 : if (pszWKT)
3288 : {
3289 186 : if (!bGotGdalSRS)
3290 : {
3291 4 : bGotCfWktSRS = true;
3292 4 : CPLDebug("GDAL_netCDF", "setting WKT from CF");
3293 : }
3294 186 : if (returnProjStr != nullptr)
3295 : {
3296 41 : (*returnProjStr) = std::string(pszWKT);
3297 : }
3298 : else
3299 : {
3300 145 : m_bAddedProjectionVarsDefs = true;
3301 145 : m_bAddedProjectionVarsData = true;
3302 290 : OGRSpatialReference oSRSTmp;
3303 145 : oSRSTmp.SetAxisMappingStrategy(
3304 : OAMS_TRADITIONAL_GIS_ORDER);
3305 145 : oSRSTmp.importFromWkt(pszWKT);
3306 145 : SetSpatialRefNoUpdate(&oSRSTmp);
3307 : }
3308 : pszGeoTransform =
3309 186 : FetchAttr(pszGridMappingValue, NCDF_GEOTRANSFORM);
3310 : }
3311 : }
3312 : else
3313 : {
3314 0 : pszGridMappingValue = CPLStrdup("");
3315 : }
3316 : }
3317 : }
3318 :
3319 : // Get information about the file.
3320 : //
3321 : // Was this file created by the GDAL netcdf driver?
3322 : // Was this file created by the newer (CF-conformant) driver?
3323 : //
3324 : // 1) If GDAL netcdf metadata is set, and version >= 1.9,
3325 : // it was created with the new driver
3326 : // 2) Else, if spatial_ref and GeoTransform are present in the
3327 : // grid_mapping variable, it was created by the old driver
3328 511 : pszValue = FetchAttr("NC_GLOBAL", "GDAL");
3329 :
3330 511 : if (pszValue && NCDFIsGDALVersionGTE(pszValue, 1900))
3331 : {
3332 239 : bIsGdalFile = true;
3333 239 : bIsGdalCfFile = true;
3334 : }
3335 272 : else if (pszWKT != nullptr && pszGeoTransform != nullptr)
3336 : {
3337 17 : bIsGdalFile = true;
3338 17 : bIsGdalCfFile = false;
3339 : }
3340 :
3341 : // Set default bottom-up default value.
3342 : // Y axis dimension and absence of GT can modify this value.
3343 : // Override with Config option GDAL_NETCDF_BOTTOMUP.
3344 :
3345 : // New driver is bottom-up by default.
3346 511 : if ((bIsGdalFile && !bIsGdalCfFile) || bSwitchedXY)
3347 19 : poDS->bBottomUp = false;
3348 : else
3349 492 : poDS->bBottomUp = true;
3350 :
3351 511 : CPLDebug("GDAL_netCDF",
3352 : "bIsGdalFile=%d bIsGdalCfFile=%d bSwitchedXY=%d bBottomUp=%d",
3353 511 : static_cast<int>(bIsGdalFile), static_cast<int>(bIsGdalCfFile),
3354 511 : static_cast<int>(bSwitchedXY), static_cast<int>(bBottomUp));
3355 :
3356 : // Read projection coordinates.
3357 :
3358 511 : int nGroupDimXID = -1;
3359 511 : int nVarDimXID = -1;
3360 511 : int nGroupDimYID = -1;
3361 511 : int nVarDimYID = -1;
3362 511 : if (sg != nullptr)
3363 : {
3364 43 : nGroupDimXID = sg->get_ncID();
3365 43 : nGroupDimYID = sg->get_ncID();
3366 43 : nVarDimXID = sg->getNodeCoordVars()[0];
3367 43 : nVarDimYID = sg->getNodeCoordVars()[1];
3368 : }
3369 :
3370 511 : if (!bReadSRSOnly)
3371 : {
3372 345 : NCDFResolveVar(nGroupId, poDS->papszDimName[nXDimID], &nGroupDimXID,
3373 : &nVarDimXID);
3374 345 : NCDFResolveVar(nGroupId, poDS->papszDimName[nYDimID], &nGroupDimYID,
3375 : &nVarDimYID);
3376 : // TODO: if above resolving fails we should also search for coordinate
3377 : // variables without same name than dimension using the same resolving
3378 : // logic. This should handle for example NASA Ocean Color L2 products.
3379 :
3380 : const bool bIgnoreXYAxisNameChecks =
3381 690 : CPLTestBool(CSLFetchNameValueDef(
3382 345 : papszOpenOptions, "IGNORE_XY_AXIS_NAME_CHECKS",
3383 : CPLGetConfigOption("GDAL_NETCDF_IGNORE_XY_AXIS_NAME_CHECKS",
3384 345 : "NO"))) ||
3385 : // Dataset from https://github.com/OSGeo/gdal/issues/4075 has a res
3386 : // and transform attributes
3387 345 : (FetchAttr(nGroupId, nVarId, "res") != nullptr &&
3388 690 : FetchAttr(nGroupId, nVarId, "transform") != nullptr) ||
3389 344 : FetchAttr(nGroupId, NC_GLOBAL, "GMT_version") != nullptr;
3390 :
3391 : // Check that they are 1D or 2D variables
3392 345 : if (nVarDimXID >= 0)
3393 : {
3394 251 : int ndims = -1;
3395 251 : nc_inq_varndims(nGroupId, nVarDimXID, &ndims);
3396 251 : if (ndims == 0 || ndims > 2)
3397 0 : nVarDimXID = -1;
3398 251 : else if (!bIgnoreXYAxisNameChecks)
3399 : {
3400 249 : if (!NCDFIsVarLongitude(nGroupId, nVarDimXID, nullptr) &&
3401 160 : !NCDFIsVarProjectionX(nGroupId, nVarDimXID, nullptr) &&
3402 : // In case of inversion of X/Y
3403 440 : !NCDFIsVarLatitude(nGroupId, nVarDimXID, nullptr) &&
3404 31 : !NCDFIsVarProjectionY(nGroupId, nVarDimXID, nullptr))
3405 : {
3406 : char szVarNameX[NC_MAX_NAME + 1];
3407 31 : CPL_IGNORE_RET_VAL(
3408 31 : nc_inq_varname(nGroupId, nVarDimXID, szVarNameX));
3409 31 : if (!(ndims == 1 &&
3410 30 : (EQUAL(szVarNameX, CF_LONGITUDE_STD_NAME) ||
3411 29 : EQUAL(szVarNameX, CF_LONGITUDE_VAR_NAME))))
3412 : {
3413 30 : CPLDebug(
3414 : "netCDF",
3415 : "Georeferencing ignored due to non-specific "
3416 : "enough X axis name. "
3417 : "Set GDAL_NETCDF_IGNORE_XY_AXIS_NAME_CHECKS=YES "
3418 : "as configuration option to bypass this check");
3419 30 : nVarDimXID = -1;
3420 : }
3421 : }
3422 : }
3423 : }
3424 :
3425 345 : if (nVarDimYID >= 0)
3426 : {
3427 253 : int ndims = -1;
3428 253 : nc_inq_varndims(nGroupId, nVarDimYID, &ndims);
3429 253 : if (ndims == 0 || ndims > 2)
3430 1 : nVarDimYID = -1;
3431 252 : else if (!bIgnoreXYAxisNameChecks)
3432 : {
3433 250 : if (!NCDFIsVarLatitude(nGroupId, nVarDimYID, nullptr) &&
3434 161 : !NCDFIsVarProjectionY(nGroupId, nVarDimYID, nullptr) &&
3435 : // In case of inversion of X/Y
3436 443 : !NCDFIsVarLongitude(nGroupId, nVarDimYID, nullptr) &&
3437 32 : !NCDFIsVarProjectionX(nGroupId, nVarDimYID, nullptr))
3438 : {
3439 : char szVarNameY[NC_MAX_NAME + 1];
3440 32 : CPL_IGNORE_RET_VAL(
3441 32 : nc_inq_varname(nGroupId, nVarDimYID, szVarNameY));
3442 32 : if (!(ndims == 1 &&
3443 32 : (EQUAL(szVarNameY, CF_LATITUDE_STD_NAME) ||
3444 31 : EQUAL(szVarNameY, CF_LATITUDE_VAR_NAME))))
3445 : {
3446 31 : CPLDebug(
3447 : "netCDF",
3448 : "Georeferencing ignored due to non-specific "
3449 : "enough Y axis name. "
3450 : "Set GDAL_NETCDF_IGNORE_XY_AXIS_NAME_CHECKS=YES "
3451 : "as configuration option to bypass this check");
3452 31 : nVarDimYID = -1;
3453 : }
3454 : }
3455 : }
3456 : }
3457 :
3458 345 : if ((nVarDimXID >= 0 && xdim == 1) || (nVarDimXID >= 0 && ydim == 1))
3459 : {
3460 0 : CPLError(CE_Warning, CPLE_AppDefined,
3461 : "1-pixel width/height files not supported, "
3462 : "xdim: %ld ydim: %ld",
3463 : static_cast<long>(xdim), static_cast<long>(ydim));
3464 0 : nVarDimXID = -1;
3465 0 : nVarDimYID = -1;
3466 : }
3467 : }
3468 :
3469 511 : const char *pszUnits = nullptr;
3470 511 : if ((nVarDimXID != -1) && (nVarDimYID != -1) && xdim > 0 && ydim > 0)
3471 : {
3472 264 : const char *pszUnitsX = FetchAttr(nGroupDimXID, nVarDimXID, "units");
3473 264 : const char *pszUnitsY = FetchAttr(nGroupDimYID, nVarDimYID, "units");
3474 : // Normalize degrees_east/degrees_north to degrees
3475 : // Cf https://github.com/OSGeo/gdal/issues/11009
3476 264 : if (pszUnitsX && EQUAL(pszUnitsX, "degrees_east"))
3477 78 : pszUnitsX = "degrees";
3478 264 : if (pszUnitsY && EQUAL(pszUnitsY, "degrees_north"))
3479 78 : pszUnitsY = "degrees";
3480 :
3481 264 : if (pszUnitsX && pszUnitsY)
3482 : {
3483 217 : if (EQUAL(pszUnitsX, pszUnitsY))
3484 214 : pszUnits = pszUnitsX;
3485 3 : else if (!pszWKT && !EQUAL(pszGridMappingValue, ""))
3486 : {
3487 0 : CPLError(CE_Failure, CPLE_AppDefined,
3488 : "X axis unit (%s) is different from Y axis "
3489 : "unit (%s). SRS will ignore axis unit and be "
3490 : "likely wrong.",
3491 : pszUnitsX, pszUnitsY);
3492 : }
3493 : }
3494 47 : else if (pszUnitsX && !pszWKT && !EQUAL(pszGridMappingValue, ""))
3495 : {
3496 0 : CPLError(CE_Failure, CPLE_AppDefined,
3497 : "X axis unit is defined, but not Y one ."
3498 : "SRS will ignore axis unit and be likely wrong.");
3499 : }
3500 47 : else if (pszUnitsY && !pszWKT && !EQUAL(pszGridMappingValue, ""))
3501 : {
3502 0 : CPLError(CE_Failure, CPLE_AppDefined,
3503 : "Y axis unit is defined, but not X one ."
3504 : "SRS will ignore axis unit and be likely wrong.");
3505 : }
3506 : }
3507 :
3508 511 : if (!pszWKT && !EQUAL(pszGridMappingValue, ""))
3509 : {
3510 31 : CPLStringList aosGridMappingKeyValues;
3511 31 : const size_t nLenGridMappingValue = strlen(pszGridMappingValue);
3512 789 : for (const char *const *papszIter = papszMetadata;
3513 789 : papszIter && *papszIter; ++papszIter)
3514 : {
3515 758 : if (STARTS_WITH(*papszIter, pszGridMappingValue) &&
3516 236 : (*papszIter)[nLenGridMappingValue] == '#')
3517 : {
3518 236 : char *pszKey = nullptr;
3519 472 : pszValue = CPLParseNameValue(
3520 236 : *papszIter + nLenGridMappingValue + 1, &pszKey);
3521 236 : if (pszKey && pszValue)
3522 236 : aosGridMappingKeyValues.SetNameValue(pszKey, pszValue);
3523 236 : CPLFree(pszKey);
3524 : }
3525 : }
3526 :
3527 31 : bGotGeogCS = aosGridMappingKeyValues.FetchNameValue(
3528 : CF_PP_SEMI_MAJOR_AXIS) != nullptr;
3529 :
3530 31 : oSRS.importFromCF1(aosGridMappingKeyValues.List(), pszUnits);
3531 31 : bGotCfSRS = oSRS.IsGeographic() || oSRS.IsProjected();
3532 : }
3533 : else
3534 : {
3535 : // Dataset from https://github.com/OSGeo/gdal/issues/4075 has a "crs"
3536 : // attribute hold on the variable of interest that contains a PROJ.4
3537 : // string
3538 480 : pszValue = FetchAttr(nGroupId, nVarId, "crs");
3539 481 : if (pszValue &&
3540 1 : (strstr(pszValue, "+proj=") != nullptr ||
3541 0 : strstr(pszValue, "GEOGCS") != nullptr ||
3542 0 : strstr(pszValue, "PROJCS") != nullptr ||
3543 481 : strstr(pszValue, "EPSG:") != nullptr) &&
3544 1 : oSRS.SetFromUserInput(pszValue) == OGRERR_NONE)
3545 : {
3546 1 : bGotCfSRS = true;
3547 : }
3548 : }
3549 :
3550 : // Set Projection from CF.
3551 511 : double dfLinearUnitsConvFactor = 1.0;
3552 511 : if ((bGotGeogCS || bGotCfSRS))
3553 : {
3554 31 : if ((nVarDimXID != -1) && (nVarDimYID != -1) && xdim > 0 && ydim > 0)
3555 : {
3556 : // Set SRS Units.
3557 :
3558 : // Check units for x and y.
3559 28 : if (oSRS.IsProjected())
3560 : {
3561 25 : dfLinearUnitsConvFactor = oSRS.GetLinearUnits(nullptr);
3562 :
3563 : // If the user doesn't ask to preserve the axis unit,
3564 : // then normalize to metre
3565 31 : if (dfLinearUnitsConvFactor != 1.0 &&
3566 6 : !CPLFetchBool(GetOpenOptions(), "PRESERVE_AXIS_UNIT_IN_CRS",
3567 : false))
3568 : {
3569 5 : oSRS.SetLinearUnits("metre", 1.0);
3570 5 : oSRS.SetAuthority("PROJCS|UNIT", "EPSG", 9001);
3571 : }
3572 : else
3573 : {
3574 20 : dfLinearUnitsConvFactor = 1.0;
3575 : }
3576 : }
3577 : }
3578 :
3579 : // Set projection.
3580 31 : char *pszTempProjection = nullptr;
3581 31 : oSRS.exportToWkt(&pszTempProjection);
3582 31 : if (pszTempProjection)
3583 : {
3584 31 : CPLDebug("GDAL_netCDF", "setting WKT from CF");
3585 31 : if (returnProjStr != nullptr)
3586 : {
3587 2 : (*returnProjStr) = std::string(pszTempProjection);
3588 : }
3589 : else
3590 : {
3591 29 : m_bAddedProjectionVarsDefs = true;
3592 29 : m_bAddedProjectionVarsData = true;
3593 29 : SetSpatialRefNoUpdate(&oSRS);
3594 : }
3595 : }
3596 31 : CPLFree(pszTempProjection);
3597 : }
3598 :
3599 511 : if (!bReadSRSOnly && (nVarDimXID != -1) && (nVarDimYID != -1) && xdim > 0 &&
3600 : ydim > 0)
3601 : {
3602 : double *pdfXCoord =
3603 221 : static_cast<double *>(CPLCalloc(xdim, sizeof(double)));
3604 : double *pdfYCoord =
3605 221 : static_cast<double *>(CPLCalloc(ydim, sizeof(double)));
3606 :
3607 221 : size_t start[2] = {0, 0};
3608 221 : size_t edge[2] = {xdim, 0};
3609 221 : int status = nc_get_vara_double(nGroupDimXID, nVarDimXID, start, edge,
3610 : pdfXCoord);
3611 221 : NCDF_ERR(status);
3612 :
3613 221 : edge[0] = ydim;
3614 221 : status = nc_get_vara_double(nGroupDimYID, nVarDimYID, start, edge,
3615 : pdfYCoord);
3616 221 : NCDF_ERR(status);
3617 :
3618 221 : nc_type nc_var_dimx_datatype = NC_NAT;
3619 : status =
3620 221 : nc_inq_vartype(nGroupDimXID, nVarDimXID, &nc_var_dimx_datatype);
3621 221 : NCDF_ERR(status);
3622 :
3623 221 : nc_type nc_var_dimy_datatype = NC_NAT;
3624 : status =
3625 221 : nc_inq_vartype(nGroupDimYID, nVarDimYID, &nc_var_dimy_datatype);
3626 221 : NCDF_ERR(status);
3627 :
3628 221 : if (!poDS->bSwitchedXY)
3629 : {
3630 : // Convert ]180,540] longitude values to ]-180,0].
3631 308 : if (NCDFIsVarLongitude(nGroupDimXID, nVarDimXID, nullptr) &&
3632 89 : CPLTestBool(
3633 : CPLGetConfigOption("GDAL_NETCDF_CENTERLONG_180", "YES")))
3634 : {
3635 : // If minimum longitude is > 180, subtract 360 from all.
3636 : // Add a check on the maximum X value too, since
3637 : // NCDFIsVarLongitude() is not very specific by default (see
3638 : // https://github.com/OSGeo/gdal/issues/1440)
3639 96 : if (std::min(pdfXCoord[0], pdfXCoord[xdim - 1]) > 180.0 &&
3640 7 : std::max(pdfXCoord[0], pdfXCoord[xdim - 1]) <= 540)
3641 : {
3642 0 : CPLDebug(
3643 : "GDAL_netCDF",
3644 : "Offsetting longitudes from ]180,540] to ]-180,180]. "
3645 : "Can be disabled with GDAL_NETCDF_CENTERLONG_180=NO");
3646 0 : for (size_t i = 0; i < xdim; i++)
3647 0 : pdfXCoord[i] -= 360;
3648 : }
3649 : }
3650 : }
3651 :
3652 : // Is pixel spacing uniform across the map?
3653 :
3654 : // Check Longitude.
3655 :
3656 221 : bool bLonSpacingOK = false;
3657 221 : if (xdim == 2)
3658 : {
3659 28 : bLonSpacingOK = true;
3660 : }
3661 : else
3662 : {
3663 193 : bool bWestIsLeft = (pdfXCoord[0] < pdfXCoord[xdim - 1]);
3664 :
3665 : // fix longitudes if longitudes should increase from
3666 : // west to east, but west > east
3667 272 : if (NCDFIsVarLongitude(nGroupDimXID, nVarDimXID, nullptr) &&
3668 79 : !bWestIsLeft)
3669 : {
3670 2 : size_t ndecreases = 0;
3671 :
3672 : // there is lon wrap if longitudes increase
3673 : // with one single decrease
3674 107 : for (size_t i = 1; i < xdim; i++)
3675 : {
3676 105 : if (pdfXCoord[i] < pdfXCoord[i - 1])
3677 1 : ndecreases++;
3678 : }
3679 :
3680 2 : if (ndecreases == 1)
3681 : {
3682 1 : CPLDebug("GDAL_netCDF", "longitude wrap detected");
3683 4 : for (size_t i = 0; i < xdim; i++)
3684 : {
3685 3 : if (pdfXCoord[i] > pdfXCoord[xdim - 1])
3686 1 : pdfXCoord[i] -= 360;
3687 : }
3688 : }
3689 : }
3690 :
3691 193 : const double dfSpacingBegin = pdfXCoord[1] - pdfXCoord[0];
3692 193 : const double dfSpacingMiddle =
3693 193 : pdfXCoord[xdim / 2 + 1] - pdfXCoord[xdim / 2];
3694 193 : const double dfSpacingLast =
3695 193 : pdfXCoord[xdim - 1] - pdfXCoord[xdim - 2];
3696 :
3697 193 : CPLDebug("GDAL_netCDF",
3698 : "xdim: %ld dfSpacingBegin: %f dfSpacingMiddle: %f "
3699 : "dfSpacingLast: %f",
3700 : static_cast<long>(xdim), dfSpacingBegin, dfSpacingMiddle,
3701 : dfSpacingLast);
3702 : #ifdef NCDF_DEBUG
3703 : CPLDebug("GDAL_netCDF", "xcoords: %f %f %f %f %f %f", pdfXCoord[0],
3704 : pdfXCoord[1], pdfXCoord[xdim / 2],
3705 : pdfXCoord[(xdim / 2) + 1], pdfXCoord[xdim - 2],
3706 : pdfXCoord[xdim - 1]);
3707 : #endif
3708 :
3709 : // ftp://ftp.cdc.noaa.gov/Datasets/NARR/Dailies/monolevel/vwnd.10m.2015.nc
3710 : // requires a 0.02% tolerance, so let's settle for 0.05%
3711 :
3712 : // For float variables, increase to 0.2% (as seen in
3713 : // https://github.com/OSGeo/gdal/issues/3663)
3714 193 : const double dfEpsRel =
3715 193 : nc_var_dimx_datatype == NC_FLOAT ? 0.002 : 0.0005;
3716 :
3717 : const double dfEps =
3718 : dfEpsRel *
3719 386 : std::max(fabs(dfSpacingBegin),
3720 193 : std::max(fabs(dfSpacingMiddle), fabs(dfSpacingLast)));
3721 380 : if (IsDifferenceBelow(dfSpacingBegin, dfSpacingLast, dfEps) &&
3722 380 : IsDifferenceBelow(dfSpacingBegin, dfSpacingMiddle, dfEps) &&
3723 187 : IsDifferenceBelow(dfSpacingMiddle, dfSpacingLast, dfEps))
3724 : {
3725 187 : bLonSpacingOK = true;
3726 : }
3727 6 : else if (CPLTestBool(CPLGetConfigOption(
3728 : "GDAL_NETCDF_IGNORE_EQUALLY_SPACED_XY_CHECK", "NO")))
3729 : {
3730 0 : bLonSpacingOK = true;
3731 0 : CPLDebug(
3732 : "GDAL_netCDF",
3733 : "Longitude/X is not equally spaced, but will be considered "
3734 : "as such because of "
3735 : "GDAL_NETCDF_IGNORE_EQUALLY_SPACED_XY_CHECK");
3736 : }
3737 : }
3738 :
3739 221 : if (bLonSpacingOK == false)
3740 : {
3741 6 : CPLDebug(
3742 : "GDAL_netCDF", "%s",
3743 : "Longitude/X is not equally spaced (with a 0.05% tolerance). "
3744 : "You may set the "
3745 : "GDAL_NETCDF_IGNORE_EQUALLY_SPACED_XY_CHECK configuration "
3746 : "option to YES to ignore this check");
3747 : }
3748 :
3749 : // Check Latitude.
3750 221 : bool bLatSpacingOK = false;
3751 :
3752 221 : if (ydim == 2)
3753 : {
3754 48 : bLatSpacingOK = true;
3755 : }
3756 : else
3757 : {
3758 173 : const double dfSpacingBegin = pdfYCoord[1] - pdfYCoord[0];
3759 173 : const double dfSpacingMiddle =
3760 173 : pdfYCoord[ydim / 2 + 1] - pdfYCoord[ydim / 2];
3761 :
3762 173 : const double dfSpacingLast =
3763 173 : pdfYCoord[ydim - 1] - pdfYCoord[ydim - 2];
3764 :
3765 173 : CPLDebug("GDAL_netCDF",
3766 : "ydim: %ld dfSpacingBegin: %f dfSpacingMiddle: %f "
3767 : "dfSpacingLast: %f",
3768 : (long)ydim, dfSpacingBegin, dfSpacingMiddle,
3769 : dfSpacingLast);
3770 : #ifdef NCDF_DEBUG
3771 : CPLDebug("GDAL_netCDF", "ycoords: %f %f %f %f %f %f", pdfYCoord[0],
3772 : pdfYCoord[1], pdfYCoord[ydim / 2],
3773 : pdfYCoord[(ydim / 2) + 1], pdfYCoord[ydim - 2],
3774 : pdfYCoord[ydim - 1]);
3775 : #endif
3776 :
3777 173 : const double dfEpsRel =
3778 173 : nc_var_dimy_datatype == NC_FLOAT ? 0.002 : 0.0005;
3779 :
3780 : const double dfEps =
3781 : dfEpsRel *
3782 346 : std::max(fabs(dfSpacingBegin),
3783 173 : std::max(fabs(dfSpacingMiddle), fabs(dfSpacingLast)));
3784 344 : if (IsDifferenceBelow(dfSpacingBegin, dfSpacingLast, dfEps) &&
3785 344 : IsDifferenceBelow(dfSpacingBegin, dfSpacingMiddle, dfEps) &&
3786 162 : IsDifferenceBelow(dfSpacingMiddle, dfSpacingLast, dfEps))
3787 : {
3788 162 : bLatSpacingOK = true;
3789 : }
3790 11 : else if (CPLTestBool(CPLGetConfigOption(
3791 : "GDAL_NETCDF_IGNORE_EQUALLY_SPACED_XY_CHECK", "NO")))
3792 : {
3793 0 : bLatSpacingOK = true;
3794 0 : CPLDebug(
3795 : "GDAL_netCDF",
3796 : "Latitude/Y is not equally spaced, but will be considered "
3797 : "as such because of "
3798 : "GDAL_NETCDF_IGNORE_EQUALLY_SPACED_XY_CHECK");
3799 : }
3800 11 : else if (!oSRS.IsProjected() &&
3801 11 : fabs(dfSpacingBegin - dfSpacingLast) <= 0.1 &&
3802 30 : fabs(dfSpacingBegin - dfSpacingMiddle) <= 0.1 &&
3803 8 : fabs(dfSpacingMiddle - dfSpacingLast) <= 0.1)
3804 : {
3805 8 : bLatSpacingOK = true;
3806 8 : CPLError(CE_Warning, CPLE_AppDefined,
3807 : "Latitude grid not spaced evenly. "
3808 : "Setting projection for grid spacing is "
3809 : "within 0.1 degrees threshold.");
3810 :
3811 8 : CPLDebug("GDAL_netCDF",
3812 : "Latitude grid not spaced evenly, but within 0.1 "
3813 : "degree threshold (probably a Gaussian grid). "
3814 : "Saving original latitude values in Y_VALUES "
3815 : "geolocation metadata");
3816 8 : Set1DGeolocation(nGroupDimYID, nVarDimYID, "Y");
3817 : }
3818 :
3819 173 : if (bLatSpacingOK == false)
3820 : {
3821 3 : CPLDebug(
3822 : "GDAL_netCDF", "%s",
3823 : "Latitude/Y is not equally spaced (with a 0.05% "
3824 : "tolerance). "
3825 : "You may set the "
3826 : "GDAL_NETCDF_IGNORE_EQUALLY_SPACED_XY_CHECK configuration "
3827 : "option to YES to ignore this check");
3828 : }
3829 : }
3830 :
3831 221 : if (bLonSpacingOK && bLatSpacingOK)
3832 : {
3833 : // We have gridded data so we can set the Georeferencing info.
3834 :
3835 : // Enable GeoTransform.
3836 :
3837 : // In the following "actual_range" and "node_offset"
3838 : // are attributes used by netCDF files created by GMT.
3839 : // If we find them we know how to proceed. Else, use
3840 : // the original algorithm.
3841 214 : bGotCfGT = true;
3842 :
3843 214 : int node_offset = 0;
3844 214 : NCDFResolveAttInt(nGroupId, NC_GLOBAL, "node_offset", &node_offset);
3845 :
3846 214 : double adfActualRange[2] = {0.0, 0.0};
3847 214 : double xMinMax[2] = {0.0, 0.0};
3848 214 : double yMinMax[2] = {0.0, 0.0};
3849 :
3850 : const auto RoundMinMaxForFloatVals =
3851 58 : [](double &dfMin, double &dfMax, int nIntervals)
3852 : {
3853 : // Helps for a case where longitudes range from
3854 : // -179.99 to 180.0 with a 0.01 degree spacing.
3855 : // However as this is encoded in a float array,
3856 : // -179.99 is actually read as -179.99000549316406 as
3857 : // a double. Try to detect that and correct the rounding
3858 :
3859 87 : const auto IsAlmostInteger = [](double dfVal)
3860 : {
3861 87 : constexpr double THRESHOLD_INTEGER = 1e-3;
3862 87 : return std::fabs(dfVal - std::round(dfVal)) <=
3863 87 : THRESHOLD_INTEGER;
3864 : };
3865 :
3866 58 : const double dfSpacing = (dfMax - dfMin) / nIntervals;
3867 58 : if (dfSpacing > 0)
3868 : {
3869 47 : const double dfInvSpacing = 1.0 / dfSpacing;
3870 47 : if (IsAlmostInteger(dfInvSpacing))
3871 : {
3872 20 : const double dfRoundedSpacing =
3873 20 : 1.0 / std::round(dfInvSpacing);
3874 20 : const double dfMinDivRoundedSpacing =
3875 20 : dfMin / dfRoundedSpacing;
3876 20 : const double dfMaxDivRoundedSpacing =
3877 20 : dfMax / dfRoundedSpacing;
3878 40 : if (IsAlmostInteger(dfMinDivRoundedSpacing) &&
3879 20 : IsAlmostInteger(dfMaxDivRoundedSpacing))
3880 : {
3881 20 : const double dfRoundedMin =
3882 20 : std::round(dfMinDivRoundedSpacing) *
3883 : dfRoundedSpacing;
3884 20 : const double dfRoundedMax =
3885 20 : std::round(dfMaxDivRoundedSpacing) *
3886 : dfRoundedSpacing;
3887 20 : if (static_cast<float>(dfMin) ==
3888 20 : static_cast<float>(dfRoundedMin) &&
3889 8 : static_cast<float>(dfMax) ==
3890 8 : static_cast<float>(dfRoundedMax))
3891 : {
3892 7 : dfMin = dfRoundedMin;
3893 7 : dfMax = dfRoundedMax;
3894 : }
3895 : }
3896 : }
3897 : }
3898 58 : };
3899 :
3900 214 : if (!nc_get_att_double(nGroupDimXID, nVarDimXID, "actual_range",
3901 : adfActualRange))
3902 : {
3903 3 : xMinMax[0] = adfActualRange[0];
3904 3 : xMinMax[1] = adfActualRange[1];
3905 :
3906 : // Present xMinMax[] in the same order as padfXCoord
3907 3 : if ((xMinMax[0] - xMinMax[1]) *
3908 3 : (pdfXCoord[0] - pdfXCoord[xdim - 1]) <
3909 : 0)
3910 : {
3911 0 : std::swap(xMinMax[0], xMinMax[1]);
3912 : }
3913 : }
3914 : else
3915 : {
3916 211 : xMinMax[0] = pdfXCoord[0];
3917 211 : xMinMax[1] = pdfXCoord[xdim - 1];
3918 211 : node_offset = 0;
3919 :
3920 211 : if (nc_var_dimx_datatype == NC_FLOAT)
3921 : {
3922 29 : RoundMinMaxForFloatVals(xMinMax[0], xMinMax[1],
3923 29 : poDS->nRasterXSize - 1);
3924 : }
3925 : }
3926 :
3927 214 : if (!nc_get_att_double(nGroupDimYID, nVarDimYID, "actual_range",
3928 : adfActualRange))
3929 : {
3930 3 : yMinMax[0] = adfActualRange[0];
3931 3 : yMinMax[1] = adfActualRange[1];
3932 :
3933 : // Present yMinMax[] in the same order as pdfYCoord
3934 3 : if ((yMinMax[0] - yMinMax[1]) *
3935 3 : (pdfYCoord[0] - pdfYCoord[ydim - 1]) <
3936 : 0)
3937 : {
3938 1 : std::swap(yMinMax[0], yMinMax[1]);
3939 : }
3940 : }
3941 : else
3942 : {
3943 211 : yMinMax[0] = pdfYCoord[0];
3944 211 : yMinMax[1] = pdfYCoord[ydim - 1];
3945 211 : node_offset = 0;
3946 :
3947 211 : if (nc_var_dimy_datatype == NC_FLOAT)
3948 : {
3949 29 : RoundMinMaxForFloatVals(yMinMax[0], yMinMax[1],
3950 29 : poDS->nRasterYSize - 1);
3951 : }
3952 : }
3953 :
3954 214 : double dfCoordOffset = 0.0;
3955 214 : double dfCoordScale = 1.0;
3956 214 : if (!nc_get_att_double(nGroupId, nVarDimXID, CF_ADD_OFFSET,
3957 218 : &dfCoordOffset) &&
3958 4 : !nc_get_att_double(nGroupId, nVarDimXID, CF_SCALE_FACTOR,
3959 : &dfCoordScale))
3960 : {
3961 4 : xMinMax[0] = dfCoordOffset + xMinMax[0] * dfCoordScale;
3962 4 : xMinMax[1] = dfCoordOffset + xMinMax[1] * dfCoordScale;
3963 : }
3964 :
3965 214 : if (!nc_get_att_double(nGroupId, nVarDimYID, CF_ADD_OFFSET,
3966 218 : &dfCoordOffset) &&
3967 4 : !nc_get_att_double(nGroupId, nVarDimYID, CF_SCALE_FACTOR,
3968 : &dfCoordScale))
3969 : {
3970 4 : yMinMax[0] = dfCoordOffset + yMinMax[0] * dfCoordScale;
3971 4 : yMinMax[1] = dfCoordOffset + yMinMax[1] * dfCoordScale;
3972 : }
3973 :
3974 : // Check for reverse order of y-coordinate.
3975 214 : if (!bSwitchedXY)
3976 : {
3977 212 : poDS->bBottomUp = (yMinMax[0] <= yMinMax[1]);
3978 212 : CPLDebug("GDAL_netCDF", "set bBottomUp = %d from Y axis",
3979 212 : static_cast<int>(poDS->bBottomUp));
3980 212 : if (!poDS->bBottomUp)
3981 : {
3982 32 : std::swap(yMinMax[0], yMinMax[1]);
3983 : }
3984 : }
3985 :
3986 : // Geostationary satellites can specify units in (micro)radians
3987 : // So we check if they do, and if so convert to linear units
3988 : // (meters)
3989 214 : const char *pszProjName = oSRS.GetAttrValue("PROJECTION");
3990 214 : if (pszProjName != nullptr)
3991 : {
3992 24 : if (EQUAL(pszProjName, SRS_PT_GEOSTATIONARY_SATELLITE))
3993 : {
3994 : double satelliteHeight =
3995 3 : oSRS.GetProjParm(SRS_PP_SATELLITE_HEIGHT, 1.0);
3996 3 : size_t nAttlen = 0;
3997 : char szUnits[NC_MAX_NAME + 1];
3998 3 : szUnits[0] = '\0';
3999 3 : nc_type nAttype = NC_NAT;
4000 3 : nc_inq_att(nGroupId, nVarDimXID, "units", &nAttype,
4001 : &nAttlen);
4002 6 : if (nAttlen < sizeof(szUnits) &&
4003 3 : nc_get_att_text(nGroupId, nVarDimXID, "units",
4004 : szUnits) == NC_NOERR)
4005 : {
4006 3 : szUnits[nAttlen] = '\0';
4007 3 : if (EQUAL(szUnits, "microradian"))
4008 : {
4009 1 : xMinMax[0] =
4010 1 : xMinMax[0] * satelliteHeight * 0.000001;
4011 1 : xMinMax[1] =
4012 1 : xMinMax[1] * satelliteHeight * 0.000001;
4013 : }
4014 2 : else if (EQUAL(szUnits, "rad") ||
4015 1 : EQUAL(szUnits, "radian"))
4016 : {
4017 2 : xMinMax[0] = xMinMax[0] * satelliteHeight;
4018 2 : xMinMax[1] = xMinMax[1] * satelliteHeight;
4019 : }
4020 : }
4021 3 : szUnits[0] = '\0';
4022 3 : nc_inq_att(nGroupId, nVarDimYID, "units", &nAttype,
4023 : &nAttlen);
4024 6 : if (nAttlen < sizeof(szUnits) &&
4025 3 : nc_get_att_text(nGroupId, nVarDimYID, "units",
4026 : szUnits) == NC_NOERR)
4027 : {
4028 3 : szUnits[nAttlen] = '\0';
4029 3 : if (EQUAL(szUnits, "microradian"))
4030 : {
4031 1 : yMinMax[0] =
4032 1 : yMinMax[0] * satelliteHeight * 0.000001;
4033 1 : yMinMax[1] =
4034 1 : yMinMax[1] * satelliteHeight * 0.000001;
4035 : }
4036 2 : else if (EQUAL(szUnits, "rad") ||
4037 1 : EQUAL(szUnits, "radian"))
4038 : {
4039 2 : yMinMax[0] = yMinMax[0] * satelliteHeight;
4040 2 : yMinMax[1] = yMinMax[1] * satelliteHeight;
4041 : }
4042 : }
4043 : }
4044 : }
4045 :
4046 214 : adfTempGeoTransform[0] = xMinMax[0];
4047 214 : adfTempGeoTransform[1] = (xMinMax[1] - xMinMax[0]) /
4048 214 : (poDS->nRasterXSize + (node_offset - 1));
4049 214 : adfTempGeoTransform[2] = 0;
4050 214 : if (bSwitchedXY)
4051 : {
4052 2 : adfTempGeoTransform[3] = yMinMax[0];
4053 2 : adfTempGeoTransform[4] = 0;
4054 2 : adfTempGeoTransform[5] =
4055 2 : (yMinMax[1] - yMinMax[0]) /
4056 2 : (poDS->nRasterYSize + (node_offset - 1));
4057 : }
4058 : else
4059 : {
4060 212 : adfTempGeoTransform[3] = yMinMax[1];
4061 212 : adfTempGeoTransform[4] = 0;
4062 212 : adfTempGeoTransform[5] =
4063 212 : (yMinMax[0] - yMinMax[1]) /
4064 212 : (poDS->nRasterYSize + (node_offset - 1));
4065 : }
4066 :
4067 : // Compute the center of the pixel.
4068 214 : if (!node_offset)
4069 : {
4070 : // Otherwise its already the pixel center.
4071 214 : adfTempGeoTransform[0] -= (adfTempGeoTransform[1] / 2);
4072 214 : adfTempGeoTransform[3] -= (adfTempGeoTransform[5] / 2);
4073 : }
4074 : }
4075 :
4076 : const auto AreSRSEqualThroughProj4String =
4077 2 : [](const OGRSpatialReference &oSRS1,
4078 : const OGRSpatialReference &oSRS2)
4079 : {
4080 2 : char *pszProj4Str1 = nullptr;
4081 2 : oSRS1.exportToProj4(&pszProj4Str1);
4082 :
4083 2 : char *pszProj4Str2 = nullptr;
4084 2 : oSRS2.exportToProj4(&pszProj4Str2);
4085 :
4086 : {
4087 2 : char *pszTmp = strstr(pszProj4Str1, "+datum=");
4088 2 : if (pszTmp)
4089 0 : memcpy(pszTmp, "+ellps=", strlen("+ellps="));
4090 : }
4091 :
4092 : {
4093 2 : char *pszTmp = strstr(pszProj4Str2, "+datum=");
4094 2 : if (pszTmp)
4095 2 : memcpy(pszTmp, "+ellps=", strlen("+ellps="));
4096 : }
4097 :
4098 2 : bool bRet = false;
4099 2 : if (pszProj4Str1 && pszProj4Str2 &&
4100 2 : EQUAL(pszProj4Str1, pszProj4Str2))
4101 : {
4102 1 : bRet = true;
4103 : }
4104 :
4105 2 : CPLFree(pszProj4Str1);
4106 2 : CPLFree(pszProj4Str2);
4107 2 : return bRet;
4108 : };
4109 :
4110 221 : if (dfLinearUnitsConvFactor != 1.0)
4111 : {
4112 35 : for (int i = 0; i < 6; ++i)
4113 30 : adfTempGeoTransform[i] *= dfLinearUnitsConvFactor;
4114 :
4115 5 : if (paosRemovedMDItems)
4116 : {
4117 : char szVarNameX[NC_MAX_NAME + 1];
4118 5 : CPL_IGNORE_RET_VAL(
4119 5 : nc_inq_varname(nGroupId, nVarDimXID, szVarNameX));
4120 :
4121 : char szVarNameY[NC_MAX_NAME + 1];
4122 5 : CPL_IGNORE_RET_VAL(
4123 5 : nc_inq_varname(nGroupId, nVarDimYID, szVarNameY));
4124 :
4125 5 : paosRemovedMDItems->push_back(
4126 : CPLSPrintf("%s#units", szVarNameX));
4127 5 : paosRemovedMDItems->push_back(
4128 : CPLSPrintf("%s#units", szVarNameY));
4129 : }
4130 : }
4131 :
4132 : // If there is a global "geospatial_bounds_crs" attribute, check that it
4133 : // is consistent with the SRS, and if so, use it as the SRS
4134 : const char *pszGBCRS =
4135 221 : FetchAttr(nGroupId, NC_GLOBAL, "geospatial_bounds_crs");
4136 221 : if (pszGBCRS && STARTS_WITH(pszGBCRS, "EPSG:"))
4137 : {
4138 4 : OGRSpatialReference oSRSFromGBCRS;
4139 2 : oSRSFromGBCRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
4140 2 : if (oSRSFromGBCRS.SetFromUserInput(
4141 : pszGBCRS,
4142 : OGRSpatialReference::
4143 4 : SET_FROM_USER_INPUT_LIMITATIONS_get()) == OGRERR_NONE &&
4144 2 : AreSRSEqualThroughProj4String(oSRS, oSRSFromGBCRS))
4145 : {
4146 1 : oSRS = std::move(oSRSFromGBCRS);
4147 1 : SetSpatialRefNoUpdate(&oSRS);
4148 : }
4149 : }
4150 :
4151 221 : CPLFree(pdfXCoord);
4152 221 : CPLFree(pdfYCoord);
4153 : } // end if(has dims)
4154 :
4155 : // Process custom GeoTransform GDAL value.
4156 511 : if (!EQUAL(pszGridMappingValue, "") && !bGotCfGT)
4157 : {
4158 : // TODO: Read the GT values and detect for conflict with CF.
4159 : // This could resolve the GT precision loss issue.
4160 :
4161 94 : if (pszGeoTransform != nullptr)
4162 : {
4163 : char **papszGeoTransform =
4164 16 : CSLTokenizeString2(pszGeoTransform, " ", CSLT_HONOURSTRINGS);
4165 16 : if (CSLCount(papszGeoTransform) == 6)
4166 : {
4167 16 : bGotGdalGT = true;
4168 112 : for (int i = 0; i < 6; i++)
4169 96 : adfTempGeoTransform[i] = CPLAtof(papszGeoTransform[i]);
4170 : }
4171 16 : CSLDestroy(papszGeoTransform);
4172 : }
4173 : else
4174 : {
4175 : // Look for corner array values.
4176 : // CPLDebug("GDAL_netCDF",
4177 : // "looking for geotransform corners");
4178 78 : bool bGotNN = false;
4179 78 : double dfNN = FetchCopyParam(pszGridMappingValue,
4180 : "Northernmost_Northing", 0, &bGotNN);
4181 :
4182 78 : bool bGotSN = false;
4183 78 : double dfSN = FetchCopyParam(pszGridMappingValue,
4184 : "Southernmost_Northing", 0, &bGotSN);
4185 :
4186 78 : bool bGotEE = false;
4187 78 : double dfEE = FetchCopyParam(pszGridMappingValue,
4188 : "Easternmost_Easting", 0, &bGotEE);
4189 :
4190 78 : bool bGotWE = false;
4191 78 : double dfWE = FetchCopyParam(pszGridMappingValue,
4192 : "Westernmost_Easting", 0, &bGotWE);
4193 :
4194 : // Only set the GeoTransform if we got all the values.
4195 78 : if (bGotNN && bGotSN && bGotEE && bGotWE)
4196 : {
4197 0 : bGotGdalGT = true;
4198 :
4199 0 : adfTempGeoTransform[0] = dfWE;
4200 0 : adfTempGeoTransform[1] =
4201 0 : (dfEE - dfWE) / (poDS->GetRasterXSize() - 1);
4202 0 : adfTempGeoTransform[2] = 0.0;
4203 0 : adfTempGeoTransform[3] = dfNN;
4204 0 : adfTempGeoTransform[4] = 0.0;
4205 0 : adfTempGeoTransform[5] =
4206 0 : (dfSN - dfNN) / (poDS->GetRasterYSize() - 1);
4207 : // Compute the center of the pixel.
4208 0 : adfTempGeoTransform[0] = dfWE - (adfTempGeoTransform[1] / 2);
4209 0 : adfTempGeoTransform[3] = dfNN - (adfTempGeoTransform[5] / 2);
4210 : }
4211 : } // (pszGeoTransform != NULL)
4212 :
4213 94 : if (bGotGdalSRS && !bGotGdalGT)
4214 72 : CPLDebug("GDAL_netCDF", "Got SRS but no geotransform from GDAL!");
4215 : }
4216 :
4217 511 : if (!pszWKT && !bGotCfSRS)
4218 : {
4219 : // Some netCDF files have a srid attribute (#6613) like
4220 : // urn:ogc:def:crs:EPSG::6931
4221 294 : const char *pszSRID = FetchAttr(pszGridMappingValue, "srid");
4222 294 : if (pszSRID != nullptr)
4223 : {
4224 0 : oSRS.Clear();
4225 0 : if (oSRS.SetFromUserInput(
4226 : pszSRID,
4227 : OGRSpatialReference::
4228 0 : SET_FROM_USER_INPUT_LIMITATIONS_get()) == OGRERR_NONE)
4229 : {
4230 0 : char *pszWKTExport = nullptr;
4231 0 : CPLDebug("GDAL_netCDF", "Got SRS from %s", pszSRID);
4232 0 : oSRS.exportToWkt(&pszWKTExport);
4233 0 : if (returnProjStr != nullptr)
4234 : {
4235 0 : (*returnProjStr) = std::string(pszWKTExport);
4236 : }
4237 : else
4238 : {
4239 0 : m_bAddedProjectionVarsDefs = true;
4240 0 : m_bAddedProjectionVarsData = true;
4241 0 : SetSpatialRefNoUpdate(&oSRS);
4242 : }
4243 0 : CPLFree(pszWKTExport);
4244 : }
4245 : }
4246 : }
4247 :
4248 511 : CPLFree(pszGridMappingValue);
4249 :
4250 511 : if (bReadSRSOnly)
4251 166 : return;
4252 :
4253 : // Determines the SRS to be used by the geolocation array, if any
4254 690 : std::string osGeolocWKT = SRS_WKT_WGS84_LAT_LONG;
4255 345 : if (!m_oSRS.IsEmpty())
4256 : {
4257 258 : OGRSpatialReference oGeogCRS;
4258 129 : oGeogCRS.CopyGeogCSFrom(&m_oSRS);
4259 129 : char *pszWKTTmp = nullptr;
4260 129 : const char *const apszOptions[] = {"FORMAT=WKT2_2019", nullptr};
4261 129 : if (oGeogCRS.exportToWkt(&pszWKTTmp, apszOptions) == OGRERR_NONE)
4262 : {
4263 129 : osGeolocWKT = pszWKTTmp;
4264 : }
4265 129 : CPLFree(pszWKTTmp);
4266 : }
4267 :
4268 : // Process geolocation arrays from CF "coordinates" attribute.
4269 690 : std::string osGeolocXName, osGeolocYName;
4270 345 : if (ProcessCFGeolocation(nGroupId, nVarId, osGeolocWKT, osGeolocXName,
4271 345 : osGeolocYName))
4272 : {
4273 52 : bool bCanCancelGT = true;
4274 52 : if ((nVarDimXID != -1) && (nVarDimYID != -1))
4275 : {
4276 : char szVarNameX[NC_MAX_NAME + 1];
4277 44 : CPL_IGNORE_RET_VAL(
4278 44 : nc_inq_varname(nGroupId, nVarDimXID, szVarNameX));
4279 : char szVarNameY[NC_MAX_NAME + 1];
4280 44 : CPL_IGNORE_RET_VAL(
4281 44 : nc_inq_varname(nGroupId, nVarDimYID, szVarNameY));
4282 44 : bCanCancelGT =
4283 44 : !(osGeolocXName == szVarNameX && osGeolocYName == szVarNameY);
4284 : }
4285 86 : if (bCanCancelGT && !m_oSRS.IsGeographic() && !m_oSRS.IsProjected() &&
4286 34 : !bSwitchedXY)
4287 : {
4288 32 : bGotCfGT = false;
4289 : }
4290 : }
4291 119 : else if (!bGotCfGT && !bReadSRSOnly && (nVarDimXID != -1) &&
4292 415 : (nVarDimYID != -1) && xdim > 0 && ydim > 0 &&
4293 3 : ((!bSwitchedXY &&
4294 3 : NCDFIsVarLongitude(nGroupId, nVarDimXID, nullptr) &&
4295 1 : NCDFIsVarLatitude(nGroupId, nVarDimYID, nullptr)) ||
4296 2 : (bSwitchedXY &&
4297 0 : NCDFIsVarLongitude(nGroupId, nVarDimYID, nullptr) &&
4298 0 : NCDFIsVarLatitude(nGroupId, nVarDimXID, nullptr))))
4299 : {
4300 : // Case of autotest/gdrivers/data/netcdf/GLMELT_4X5.OCN.nc
4301 : // which is indexed by lat, lon variables, but lat has irregular
4302 : // spacing.
4303 1 : const char *pszGeolocXFullName = poDS->papszDimName[poDS->nXDimID];
4304 1 : const char *pszGeolocYFullName = poDS->papszDimName[poDS->nYDimID];
4305 1 : if (bSwitchedXY)
4306 : {
4307 0 : std::swap(pszGeolocXFullName, pszGeolocYFullName);
4308 0 : GDALPamDataset::SetMetadataItem("SWAP_XY", "YES", "GEOLOCATION");
4309 : }
4310 :
4311 1 : CPLDebug("GDAL_netCDF", "using variables %s and %s for GEOLOCATION",
4312 : pszGeolocXFullName, pszGeolocYFullName);
4313 :
4314 1 : GDALPamDataset::SetMetadataItem("SRS", osGeolocWKT.c_str(),
4315 : "GEOLOCATION");
4316 :
4317 2 : CPLString osTMP;
4318 1 : osTMP.Printf("NETCDF:\"%s\":%s", osFilename.c_str(),
4319 1 : pszGeolocXFullName);
4320 :
4321 1 : GDALPamDataset::SetMetadataItem("X_DATASET", osTMP, "GEOLOCATION");
4322 1 : GDALPamDataset::SetMetadataItem("X_BAND", "1", "GEOLOCATION");
4323 1 : osTMP.Printf("NETCDF:\"%s\":%s", osFilename.c_str(),
4324 1 : pszGeolocYFullName);
4325 :
4326 1 : GDALPamDataset::SetMetadataItem("Y_DATASET", osTMP, "GEOLOCATION");
4327 1 : GDALPamDataset::SetMetadataItem("Y_BAND", "1", "GEOLOCATION");
4328 :
4329 1 : GDALPamDataset::SetMetadataItem("PIXEL_OFFSET", "0", "GEOLOCATION");
4330 1 : GDALPamDataset::SetMetadataItem("PIXEL_STEP", "1", "GEOLOCATION");
4331 :
4332 1 : GDALPamDataset::SetMetadataItem("LINE_OFFSET", "0", "GEOLOCATION");
4333 1 : GDALPamDataset::SetMetadataItem("LINE_STEP", "1", "GEOLOCATION");
4334 :
4335 1 : GDALPamDataset::SetMetadataItem("GEOREFERENCING_CONVENTION",
4336 : "PIXEL_CENTER", "GEOLOCATION");
4337 : }
4338 :
4339 : // Set GeoTransform if we got a complete one - after projection has been set
4340 345 : if (bGotCfGT || bGotGdalGT)
4341 : {
4342 196 : m_bAddedProjectionVarsDefs = true;
4343 196 : m_bAddedProjectionVarsData = true;
4344 196 : SetGeoTransformNoUpdate(adfTempGeoTransform);
4345 : }
4346 :
4347 : // Debugging reports.
4348 345 : CPLDebug("GDAL_netCDF",
4349 : "bGotGeogCS=%d bGotCfSRS=%d bGotCfGT=%d bGotCfWktSRS=%d "
4350 : "bGotGdalSRS=%d bGotGdalGT=%d",
4351 : static_cast<int>(bGotGeogCS), static_cast<int>(bGotCfSRS),
4352 : static_cast<int>(bGotCfGT), static_cast<int>(bGotCfWktSRS),
4353 : static_cast<int>(bGotGdalSRS), static_cast<int>(bGotGdalGT));
4354 :
4355 345 : if (!bGotCfGT && !bGotGdalGT)
4356 149 : CPLDebug("GDAL_netCDF", "did not get geotransform from CF nor GDAL!");
4357 :
4358 345 : if (!bGotGeogCS && !bGotCfSRS && !bGotGdalSRS && !bGotCfGT && !bGotCfWktSRS)
4359 149 : CPLDebug("GDAL_netCDF", "did not get projection from CF nor GDAL!");
4360 :
4361 : // wish of 6195
4362 : // we don't have CS/SRS, but we do have GT, and we live in -180,360 -90,90
4363 345 : if (!bGotGeogCS && !bGotCfSRS && !bGotGdalSRS && !bGotCfWktSRS)
4364 : {
4365 216 : if (bGotCfGT || bGotGdalGT)
4366 : {
4367 134 : bool bAssumedLongLat = CPLTestBool(CSLFetchNameValueDef(
4368 67 : papszOpenOptions, "ASSUME_LONGLAT",
4369 : CPLGetConfigOption("GDAL_NETCDF_ASSUME_LONGLAT", "NO")));
4370 :
4371 2 : if (bAssumedLongLat && adfTempGeoTransform[0] >= -180 &&
4372 2 : adfTempGeoTransform[0] < 360 &&
4373 4 : (adfTempGeoTransform[0] +
4374 2 : adfTempGeoTransform[1] * poDS->GetRasterXSize()) <= 360 &&
4375 71 : adfTempGeoTransform[3] <= 90 && adfTempGeoTransform[3] > -90 &&
4376 4 : (adfTempGeoTransform[3] +
4377 2 : adfTempGeoTransform[5] * poDS->GetRasterYSize()) >= -90)
4378 : {
4379 :
4380 2 : poDS->bIsGeographic = true;
4381 2 : char *pszTempProjection = nullptr;
4382 : // seems odd to use 4326 so OGC:CRS84
4383 2 : oSRS.SetFromUserInput("OGC:CRS84");
4384 2 : oSRS.exportToWkt(&pszTempProjection);
4385 2 : if (returnProjStr != nullptr)
4386 : {
4387 0 : (*returnProjStr) = std::string(pszTempProjection);
4388 : }
4389 : else
4390 : {
4391 2 : m_bAddedProjectionVarsDefs = true;
4392 2 : m_bAddedProjectionVarsData = true;
4393 2 : SetSpatialRefNoUpdate(&oSRS);
4394 : }
4395 2 : CPLFree(pszTempProjection);
4396 :
4397 2 : CPLDebug("netCDF",
4398 : "Assumed Longitude Latitude CRS 'OGC:CRS84' because "
4399 : "none otherwise available and geotransform within "
4400 : "suitable bounds. "
4401 : "Set GDAL_NETCDF_ASSUME_LONGLAT=NO as configuration "
4402 : "option or "
4403 : " ASSUME_LONGLAT=NO as open option to bypass this "
4404 : "assumption.");
4405 : }
4406 : }
4407 : }
4408 :
4409 : // Search for Well-known GeogCS if got only CF WKT
4410 : // Disabled for now, as a named datum also include control points
4411 : // (see mailing list and bug#4281
4412 : // For example, WGS84 vs. GDA94 (EPSG:3577) - AEA in netcdf_cf.py
4413 :
4414 : // Disabled for now, but could be set in a config option.
4415 : #if 0
4416 : bool bLookForWellKnownGCS = false; // This could be a Config Option.
4417 :
4418 : if( bLookForWellKnownGCS && bGotCfSRS && !bGotGdalSRS )
4419 : {
4420 : // ET - Could use a more exhaustive method by scanning all EPSG codes in
4421 : // data/gcs.csv as proposed by Even in the gdal-dev mailing list "help
4422 : // for comparing two WKT".
4423 : // This code could be contributed to a new function.
4424 : // OGRSpatialReference * OGRSpatialReference::FindMatchingGeogCS(
4425 : // const OGRSpatialReference *poOther) */
4426 : CPLDebug("GDAL_netCDF", "Searching for Well-known GeogCS");
4427 : const char *pszWKGCSList[] = { "WGS84", "WGS72", "NAD27", "NAD83" };
4428 : char *pszWKGCS = NULL;
4429 : oSRS.exportToPrettyWkt(&pszWKGCS);
4430 : for( size_t i = 0; i < sizeof(pszWKGCSList) / 8; i++ )
4431 : {
4432 : pszWKGCS = CPLStrdup(pszWKGCSList[i]);
4433 : OGRSpatialReference oSRSTmp;
4434 : oSRSTmp.SetWellKnownGeogCS(pszWKGCSList[i]);
4435 : // Set datum to unknown, bug #4281.
4436 : if( oSRSTmp.GetAttrNode("DATUM" ) )
4437 : oSRSTmp.GetAttrNode("DATUM")->GetChild(0)->SetValue("unknown");
4438 : // Could use OGRSpatialReference::StripCTParms(), but let's keep
4439 : // TOWGS84.
4440 : oSRSTmp.GetRoot()->StripNodes("AXIS");
4441 : oSRSTmp.GetRoot()->StripNodes("AUTHORITY");
4442 : oSRSTmp.GetRoot()->StripNodes("EXTENSION");
4443 :
4444 : oSRSTmp.exportToPrettyWkt(&pszWKGCS);
4445 : if( oSRS.IsSameGeogCS(&oSRSTmp) )
4446 : {
4447 : oSRS.SetWellKnownGeogCS(pszWKGCSList[i]);
4448 : oSRS.exportToWkt(&(pszTempProjection));
4449 : SetProjection(pszTempProjection);
4450 : CPLFree(pszTempProjection);
4451 : }
4452 : }
4453 : }
4454 : #endif
4455 : }
4456 :
4457 123 : void netCDFDataset::SetProjectionFromVar(int nGroupId, int nVarId,
4458 : bool bReadSRSOnly)
4459 : {
4460 123 : SetProjectionFromVar(nGroupId, nVarId, bReadSRSOnly, nullptr, nullptr,
4461 : nullptr, nullptr);
4462 123 : }
4463 :
4464 282 : bool netCDFDataset::ProcessNASAL2OceanGeoLocation(int nGroupId, int nVarId)
4465 : {
4466 : // Cf https://oceancolor.gsfc.nasa.gov/docs/format/l2nc/
4467 : // and https://github.com/OSGeo/gdal/issues/7605
4468 :
4469 : // Check for a structure like:
4470 : /* netcdf SNPP_VIIRS.20230406T024200.L2.OC.NRT {
4471 : dimensions:
4472 : number_of_lines = 3248 ;
4473 : pixels_per_line = 3200 ;
4474 : [...]
4475 : pixel_control_points = 3200 ;
4476 : [...]
4477 : group: geophysical_data {
4478 : variables:
4479 : short aot_862(number_of_lines, pixels_per_line) ; <-- nVarId
4480 : [...]
4481 : }
4482 : group: navigation_data {
4483 : variables:
4484 : float longitude(number_of_lines, pixel_control_points) ;
4485 : [...]
4486 : float latitude(number_of_lines, pixel_control_points) ;
4487 : [...]
4488 : }
4489 : }
4490 : */
4491 : // Note that the longitude and latitude arrays are not indexed by the
4492 : // same dimensions. Handle only the case where
4493 : // pixel_control_points == pixels_per_line
4494 : // If there was a subsampling of the geolocation arrays, we'd need to
4495 : // add more logic.
4496 :
4497 564 : std::string osGroupName;
4498 282 : osGroupName.resize(NC_MAX_NAME);
4499 282 : NCDF_ERR(nc_inq_grpname(nGroupId, &osGroupName[0]));
4500 282 : osGroupName.resize(strlen(osGroupName.data()));
4501 282 : if (osGroupName != "geophysical_data")
4502 281 : return false;
4503 :
4504 1 : int nVarDims = 0;
4505 1 : NCDF_ERR(nc_inq_varndims(nGroupId, nVarId, &nVarDims));
4506 1 : if (nVarDims != 2)
4507 0 : return false;
4508 :
4509 1 : int nNavigationDataGrpId = 0;
4510 1 : if (nc_inq_grp_ncid(cdfid, "navigation_data", &nNavigationDataGrpId) !=
4511 : NC_NOERR)
4512 0 : return false;
4513 :
4514 : std::array<int, 2> anVarDimIds;
4515 1 : NCDF_ERR(nc_inq_vardimid(nGroupId, nVarId, anVarDimIds.data()));
4516 :
4517 1 : int nLongitudeId = 0;
4518 1 : int nLatitudeId = 0;
4519 1 : if (nc_inq_varid(nNavigationDataGrpId, "longitude", &nLongitudeId) !=
4520 2 : NC_NOERR ||
4521 1 : nc_inq_varid(nNavigationDataGrpId, "latitude", &nLatitudeId) !=
4522 : NC_NOERR)
4523 : {
4524 0 : return false;
4525 : }
4526 :
4527 1 : int nDimsLongitude = 0;
4528 1 : NCDF_ERR(
4529 : nc_inq_varndims(nNavigationDataGrpId, nLongitudeId, &nDimsLongitude));
4530 1 : int nDimsLatitude = 0;
4531 1 : NCDF_ERR(
4532 : nc_inq_varndims(nNavigationDataGrpId, nLatitudeId, &nDimsLatitude));
4533 1 : if (!(nDimsLongitude == 2 && nDimsLatitude == 2))
4534 : {
4535 0 : return false;
4536 : }
4537 :
4538 : std::array<int, 2> anDimLongitudeIds;
4539 1 : NCDF_ERR(nc_inq_vardimid(nNavigationDataGrpId, nLongitudeId,
4540 : anDimLongitudeIds.data()));
4541 : std::array<int, 2> anDimLatitudeIds;
4542 1 : NCDF_ERR(nc_inq_vardimid(nNavigationDataGrpId, nLatitudeId,
4543 : anDimLatitudeIds.data()));
4544 1 : if (anDimLongitudeIds != anDimLatitudeIds)
4545 : {
4546 0 : return false;
4547 : }
4548 :
4549 : std::array<size_t, 2> anSizeVarDimIds;
4550 : std::array<size_t, 2> anSizeLongLatIds;
4551 2 : if (!(nc_inq_dimlen(cdfid, anVarDimIds[0], &anSizeVarDimIds[0]) ==
4552 1 : NC_NOERR &&
4553 1 : nc_inq_dimlen(cdfid, anVarDimIds[1], &anSizeVarDimIds[1]) ==
4554 1 : NC_NOERR &&
4555 1 : nc_inq_dimlen(cdfid, anDimLongitudeIds[0], &anSizeLongLatIds[0]) ==
4556 1 : NC_NOERR &&
4557 1 : nc_inq_dimlen(cdfid, anDimLongitudeIds[1], &anSizeLongLatIds[1]) ==
4558 : NC_NOERR &&
4559 1 : anSizeVarDimIds == anSizeLongLatIds))
4560 : {
4561 0 : return false;
4562 : }
4563 :
4564 1 : const char *pszGeolocXFullName = "/navigation_data/longitude";
4565 1 : const char *pszGeolocYFullName = "/navigation_data/latitude";
4566 :
4567 1 : if (bSwitchedXY)
4568 : {
4569 0 : std::swap(pszGeolocXFullName, pszGeolocYFullName);
4570 0 : GDALPamDataset::SetMetadataItem("SWAP_XY", "YES", "GEOLOCATION");
4571 : }
4572 :
4573 1 : CPLDebug("GDAL_netCDF", "using variables %s and %s for GEOLOCATION",
4574 : pszGeolocXFullName, pszGeolocYFullName);
4575 :
4576 1 : GDALPamDataset::SetMetadataItem("SRS", SRS_WKT_WGS84_LAT_LONG,
4577 : "GEOLOCATION");
4578 :
4579 1 : CPLString osTMP;
4580 1 : osTMP.Printf("NETCDF:\"%s\":%s", osFilename.c_str(), pszGeolocXFullName);
4581 :
4582 1 : GDALPamDataset::SetMetadataItem("X_DATASET", osTMP, "GEOLOCATION");
4583 1 : GDALPamDataset::SetMetadataItem("X_BAND", "1", "GEOLOCATION");
4584 1 : osTMP.Printf("NETCDF:\"%s\":%s", osFilename.c_str(), pszGeolocYFullName);
4585 :
4586 1 : GDALPamDataset::SetMetadataItem("Y_DATASET", osTMP, "GEOLOCATION");
4587 1 : GDALPamDataset::SetMetadataItem("Y_BAND", "1", "GEOLOCATION");
4588 :
4589 1 : GDALPamDataset::SetMetadataItem("PIXEL_OFFSET", "0", "GEOLOCATION");
4590 1 : GDALPamDataset::SetMetadataItem("PIXEL_STEP", "1", "GEOLOCATION");
4591 :
4592 1 : GDALPamDataset::SetMetadataItem("LINE_OFFSET", "0", "GEOLOCATION");
4593 1 : GDALPamDataset::SetMetadataItem("LINE_STEP", "1", "GEOLOCATION");
4594 :
4595 1 : GDALPamDataset::SetMetadataItem("GEOREFERENCING_CONVENTION", "PIXEL_CENTER",
4596 : "GEOLOCATION");
4597 1 : return true;
4598 : }
4599 :
4600 281 : bool netCDFDataset::ProcessNASAEMITGeoLocation(int nGroupId, int nVarId)
4601 : {
4602 : // Cf https://earth.jpl.nasa.gov/emit/data/data-portal/coverage-and-forecasts/
4603 :
4604 : // Check for a structure like:
4605 : /* netcdf EMIT_L2A_RFL_001_20220903T163129_2224611_012 {
4606 : dimensions:
4607 : downtrack = 1280 ;
4608 : crosstrack = 1242 ;
4609 : bands = 285 ;
4610 : [...]
4611 :
4612 : variables:
4613 : float reflectance(downtrack, crosstrack, bands) ;
4614 :
4615 : group: location {
4616 : variables:
4617 : double lon(downtrack, crosstrack) ;
4618 : lon:_FillValue = -9999. ;
4619 : lon:long_name = "Longitude (WGS-84)" ;
4620 : lon:units = "degrees east" ;
4621 : double lat(downtrack, crosstrack) ;
4622 : lat:_FillValue = -9999. ;
4623 : lat:long_name = "Latitude (WGS-84)" ;
4624 : lat:units = "degrees north" ;
4625 : } // group location
4626 :
4627 : }
4628 : or
4629 : netcdf EMIT_L2B_MIN_001_20231024T055538_2329704_040 {
4630 : dimensions:
4631 : downtrack = 1664 ;
4632 : crosstrack = 1242 ;
4633 : [...]
4634 : variables:
4635 : float group_1_band_depth(downtrack, crosstrack) ;
4636 : group_1_band_depth:_FillValue = -9999.f ;
4637 : group_1_band_depth:long_name = "Group 1 Band Depth" ;
4638 : group_1_band_depth:units = "unitless" ;
4639 : [...]
4640 : group: location {
4641 : variables:
4642 : double lon(downtrack, crosstrack) ;
4643 : lon:_FillValue = -9999. ;
4644 : lon:long_name = "Longitude (WGS-84)" ;
4645 : lon:units = "degrees east" ;
4646 : double lat(downtrack, crosstrack) ;
4647 : lat:_FillValue = -9999. ;
4648 : lat:long_name = "Latitude (WGS-84)" ;
4649 : lat:units = "degrees north" ;
4650 : }
4651 : */
4652 :
4653 281 : int nVarDims = 0;
4654 281 : NCDF_ERR(nc_inq_varndims(nGroupId, nVarId, &nVarDims));
4655 281 : if (nVarDims != 2 && nVarDims != 3)
4656 14 : return false;
4657 :
4658 267 : int nLocationGrpId = 0;
4659 267 : if (nc_inq_grp_ncid(cdfid, "location", &nLocationGrpId) != NC_NOERR)
4660 57 : return false;
4661 :
4662 : std::array<int, 3> anVarDimIds;
4663 210 : NCDF_ERR(nc_inq_vardimid(nGroupId, nVarId, anVarDimIds.data()));
4664 210 : if (nYDimID != anVarDimIds[0] || nXDimID != anVarDimIds[1])
4665 21 : return false;
4666 :
4667 189 : int nLongitudeId = 0;
4668 189 : int nLatitudeId = 0;
4669 226 : if (nc_inq_varid(nLocationGrpId, "lon", &nLongitudeId) != NC_NOERR ||
4670 37 : nc_inq_varid(nLocationGrpId, "lat", &nLatitudeId) != NC_NOERR)
4671 : {
4672 152 : return false;
4673 : }
4674 :
4675 37 : int nDimsLongitude = 0;
4676 37 : NCDF_ERR(nc_inq_varndims(nLocationGrpId, nLongitudeId, &nDimsLongitude));
4677 37 : int nDimsLatitude = 0;
4678 37 : NCDF_ERR(nc_inq_varndims(nLocationGrpId, nLatitudeId, &nDimsLatitude));
4679 37 : if (!(nDimsLongitude == 2 && nDimsLatitude == 2))
4680 : {
4681 33 : return false;
4682 : }
4683 :
4684 : std::array<int, 2> anDimLongitudeIds;
4685 4 : NCDF_ERR(nc_inq_vardimid(nLocationGrpId, nLongitudeId,
4686 : anDimLongitudeIds.data()));
4687 : std::array<int, 2> anDimLatitudeIds;
4688 4 : NCDF_ERR(
4689 : nc_inq_vardimid(nLocationGrpId, nLatitudeId, anDimLatitudeIds.data()));
4690 4 : if (anDimLongitudeIds != anDimLatitudeIds)
4691 : {
4692 0 : return false;
4693 : }
4694 :
4695 8 : if (anDimLongitudeIds[0] != anVarDimIds[0] ||
4696 4 : anDimLongitudeIds[1] != anVarDimIds[1])
4697 : {
4698 0 : return false;
4699 : }
4700 :
4701 4 : const char *pszGeolocXFullName = "/location/lon";
4702 4 : const char *pszGeolocYFullName = "/location/lat";
4703 :
4704 4 : CPLDebug("GDAL_netCDF", "using variables %s and %s for GEOLOCATION",
4705 : pszGeolocXFullName, pszGeolocYFullName);
4706 :
4707 4 : GDALPamDataset::SetMetadataItem("SRS", SRS_WKT_WGS84_LAT_LONG,
4708 : "GEOLOCATION");
4709 :
4710 4 : CPLString osTMP;
4711 4 : osTMP.Printf("NETCDF:\"%s\":%s", osFilename.c_str(), pszGeolocXFullName);
4712 :
4713 4 : GDALPamDataset::SetMetadataItem("X_DATASET", osTMP, "GEOLOCATION");
4714 4 : GDALPamDataset::SetMetadataItem("X_BAND", "1", "GEOLOCATION");
4715 4 : osTMP.Printf("NETCDF:\"%s\":%s", osFilename.c_str(), pszGeolocYFullName);
4716 :
4717 4 : GDALPamDataset::SetMetadataItem("Y_DATASET", osTMP, "GEOLOCATION");
4718 4 : GDALPamDataset::SetMetadataItem("Y_BAND", "1", "GEOLOCATION");
4719 :
4720 4 : GDALPamDataset::SetMetadataItem("PIXEL_OFFSET", "0", "GEOLOCATION");
4721 4 : GDALPamDataset::SetMetadataItem("PIXEL_STEP", "1", "GEOLOCATION");
4722 :
4723 4 : GDALPamDataset::SetMetadataItem("LINE_OFFSET", "0", "GEOLOCATION");
4724 4 : GDALPamDataset::SetMetadataItem("LINE_STEP", "1", "GEOLOCATION");
4725 :
4726 4 : GDALPamDataset::SetMetadataItem("GEOREFERENCING_CONVENTION", "PIXEL_CENTER",
4727 : "GEOLOCATION");
4728 4 : return true;
4729 : }
4730 :
4731 345 : int netCDFDataset::ProcessCFGeolocation(int nGroupId, int nVarId,
4732 : const std::string &osGeolocWKT,
4733 : std::string &osGeolocXNameOut,
4734 : std::string &osGeolocYNameOut)
4735 : {
4736 345 : bool bAddGeoloc = false;
4737 345 : char *pszCoordinates = nullptr;
4738 :
4739 : // If there is no explicit "coordinates" attribute, check if there are
4740 : // "lon" and "lat" 2D variables whose dimensions are the last
4741 : // 2 ones of the variable of interest.
4742 345 : if (NCDFGetAttr(nGroupId, nVarId, "coordinates", &pszCoordinates) !=
4743 : CE_None)
4744 : {
4745 299 : CPLFree(pszCoordinates);
4746 299 : pszCoordinates = nullptr;
4747 :
4748 299 : int nVarDims = 0;
4749 299 : NCDF_ERR(nc_inq_varndims(nGroupId, nVarId, &nVarDims));
4750 299 : if (nVarDims >= 2)
4751 : {
4752 598 : std::vector<int> anVarDimIds(nVarDims);
4753 299 : NCDF_ERR(nc_inq_vardimid(nGroupId, nVarId, anVarDimIds.data()));
4754 :
4755 299 : int nLongitudeId = 0;
4756 299 : int nLatitudeId = 0;
4757 366 : if (nc_inq_varid(nGroupId, "lon", &nLongitudeId) == NC_NOERR &&
4758 67 : nc_inq_varid(nGroupId, "lat", &nLatitudeId) == NC_NOERR)
4759 : {
4760 67 : int nDimsLongitude = 0;
4761 67 : NCDF_ERR(
4762 : nc_inq_varndims(nGroupId, nLongitudeId, &nDimsLongitude));
4763 67 : int nDimsLatitude = 0;
4764 67 : NCDF_ERR(
4765 : nc_inq_varndims(nGroupId, nLatitudeId, &nDimsLatitude));
4766 67 : if (nDimsLongitude == 2 && nDimsLatitude == 2)
4767 : {
4768 34 : std::vector<int> anDimLongitudeIds(2);
4769 17 : NCDF_ERR(nc_inq_vardimid(nGroupId, nLongitudeId,
4770 : anDimLongitudeIds.data()));
4771 34 : std::vector<int> anDimLatitudeIds(2);
4772 17 : NCDF_ERR(nc_inq_vardimid(nGroupId, nLatitudeId,
4773 : anDimLatitudeIds.data()));
4774 17 : if (anDimLongitudeIds == anDimLatitudeIds &&
4775 34 : anVarDimIds[anVarDimIds.size() - 2] ==
4776 51 : anDimLongitudeIds[0] &&
4777 34 : anVarDimIds[anVarDimIds.size() - 1] ==
4778 17 : anDimLongitudeIds[1])
4779 : {
4780 17 : pszCoordinates = CPLStrdup("lon lat");
4781 : }
4782 : }
4783 : }
4784 : }
4785 : }
4786 :
4787 345 : if (pszCoordinates)
4788 : {
4789 : // Get X and Y geolocation names from coordinates attribute.
4790 : const CPLStringList aosCoordinates(
4791 126 : NCDFTokenizeCoordinatesAttribute(pszCoordinates));
4792 63 : if (aosCoordinates.size() >= 2)
4793 : {
4794 : char szGeolocXName[NC_MAX_NAME + 1];
4795 : char szGeolocYName[NC_MAX_NAME + 1];
4796 60 : szGeolocXName[0] = '\0';
4797 60 : szGeolocYName[0] = '\0';
4798 :
4799 : // Test that each variable is longitude/latitude.
4800 193 : for (int i = 0; i < aosCoordinates.size(); i++)
4801 : {
4802 133 : if (NCDFIsVarLongitude(nGroupId, -1, aosCoordinates[i]))
4803 : {
4804 49 : int nOtherGroupId = -1;
4805 49 : int nOtherVarId = -1;
4806 : // Check that the variable actually exists
4807 : // Needed on Sentinel-3 products
4808 49 : if (NCDFResolveVar(nGroupId, aosCoordinates[i],
4809 49 : &nOtherGroupId, &nOtherVarId) == CE_None)
4810 : {
4811 47 : snprintf(szGeolocXName, sizeof(szGeolocXName), "%s",
4812 : aosCoordinates[i]);
4813 : }
4814 : }
4815 84 : else if (NCDFIsVarLatitude(nGroupId, -1, aosCoordinates[i]))
4816 : {
4817 49 : int nOtherGroupId = -1;
4818 49 : int nOtherVarId = -1;
4819 : // Check that the variable actually exists
4820 : // Needed on Sentinel-3 products
4821 49 : if (NCDFResolveVar(nGroupId, aosCoordinates[i],
4822 49 : &nOtherGroupId, &nOtherVarId) == CE_None)
4823 : {
4824 47 : snprintf(szGeolocYName, sizeof(szGeolocYName), "%s",
4825 : aosCoordinates[i]);
4826 : }
4827 : }
4828 : }
4829 : // Add GEOLOCATION metadata.
4830 60 : if (!EQUAL(szGeolocXName, "") && !EQUAL(szGeolocYName, ""))
4831 : {
4832 47 : osGeolocXNameOut = szGeolocXName;
4833 47 : osGeolocYNameOut = szGeolocYName;
4834 :
4835 47 : char *pszGeolocXFullName = nullptr;
4836 47 : char *pszGeolocYFullName = nullptr;
4837 47 : if (NCDFResolveVarFullName(nGroupId, szGeolocXName,
4838 94 : &pszGeolocXFullName) == CE_None &&
4839 47 : NCDFResolveVarFullName(nGroupId, szGeolocYName,
4840 : &pszGeolocYFullName) == CE_None)
4841 : {
4842 47 : if (bSwitchedXY)
4843 : {
4844 2 : std::swap(pszGeolocXFullName, pszGeolocYFullName);
4845 2 : GDALPamDataset::SetMetadataItem("SWAP_XY", "YES",
4846 : "GEOLOCATION");
4847 : }
4848 :
4849 47 : bAddGeoloc = true;
4850 47 : CPLDebug("GDAL_netCDF",
4851 : "using variables %s and %s for GEOLOCATION",
4852 : pszGeolocXFullName, pszGeolocYFullName);
4853 :
4854 47 : GDALPamDataset::SetMetadataItem("SRS", osGeolocWKT.c_str(),
4855 : "GEOLOCATION");
4856 :
4857 94 : CPLString osTMP;
4858 47 : osTMP.Printf("NETCDF:\"%s\":%s", osFilename.c_str(),
4859 47 : pszGeolocXFullName);
4860 :
4861 47 : GDALPamDataset::SetMetadataItem("X_DATASET", osTMP,
4862 : "GEOLOCATION");
4863 47 : GDALPamDataset::SetMetadataItem("X_BAND", "1",
4864 : "GEOLOCATION");
4865 47 : osTMP.Printf("NETCDF:\"%s\":%s", osFilename.c_str(),
4866 47 : pszGeolocYFullName);
4867 :
4868 47 : GDALPamDataset::SetMetadataItem("Y_DATASET", osTMP,
4869 : "GEOLOCATION");
4870 47 : GDALPamDataset::SetMetadataItem("Y_BAND", "1",
4871 : "GEOLOCATION");
4872 :
4873 47 : GDALPamDataset::SetMetadataItem("PIXEL_OFFSET", "0",
4874 : "GEOLOCATION");
4875 47 : GDALPamDataset::SetMetadataItem("PIXEL_STEP", "1",
4876 : "GEOLOCATION");
4877 :
4878 47 : GDALPamDataset::SetMetadataItem("LINE_OFFSET", "0",
4879 : "GEOLOCATION");
4880 47 : GDALPamDataset::SetMetadataItem("LINE_STEP", "1",
4881 : "GEOLOCATION");
4882 :
4883 47 : GDALPamDataset::SetMetadataItem("GEOREFERENCING_CONVENTION",
4884 : "PIXEL_CENTER",
4885 : "GEOLOCATION");
4886 : }
4887 : else
4888 : {
4889 0 : CPLDebug("GDAL_netCDF",
4890 : "cannot resolve location of "
4891 : "lat/lon variables specified by the coordinates "
4892 : "attribute [%s]",
4893 : pszCoordinates);
4894 : }
4895 47 : CPLFree(pszGeolocXFullName);
4896 47 : CPLFree(pszGeolocYFullName);
4897 : }
4898 : else
4899 : {
4900 13 : CPLDebug("GDAL_netCDF",
4901 : "coordinates attribute [%s] is unsupported",
4902 : pszCoordinates);
4903 : }
4904 : }
4905 : else
4906 : {
4907 3 : CPLDebug("GDAL_netCDF",
4908 : "coordinates attribute [%s] with %d element(s) is "
4909 : "unsupported",
4910 : pszCoordinates, aosCoordinates.size());
4911 : }
4912 : }
4913 :
4914 : else
4915 : {
4916 282 : bAddGeoloc = ProcessNASAL2OceanGeoLocation(nGroupId, nVarId);
4917 :
4918 282 : if (!bAddGeoloc)
4919 281 : bAddGeoloc = ProcessNASAEMITGeoLocation(nGroupId, nVarId);
4920 : }
4921 :
4922 345 : CPLFree(pszCoordinates);
4923 :
4924 345 : return bAddGeoloc;
4925 : }
4926 :
4927 8 : CPLErr netCDFDataset::Set1DGeolocation(int nGroupId, int nVarId,
4928 : const char *szDimName)
4929 : {
4930 : // Get values.
4931 8 : char *pszVarValues = nullptr;
4932 8 : CPLErr eErr = NCDFGet1DVar(nGroupId, nVarId, &pszVarValues);
4933 8 : if (eErr != CE_None)
4934 0 : return eErr;
4935 :
4936 : // Write metadata.
4937 8 : char szTemp[NC_MAX_NAME + 1 + 32] = {};
4938 8 : snprintf(szTemp, sizeof(szTemp), "%s_VALUES", szDimName);
4939 8 : GDALPamDataset::SetMetadataItem(szTemp, pszVarValues, "GEOLOCATION2");
4940 :
4941 8 : CPLFree(pszVarValues);
4942 :
4943 8 : return CE_None;
4944 : }
4945 :
4946 0 : double *netCDFDataset::Get1DGeolocation(CPL_UNUSED const char *szDimName,
4947 : int &nVarLen)
4948 : {
4949 0 : nVarLen = 0;
4950 :
4951 : // Get Y_VALUES as tokens.
4952 : char **papszValues =
4953 0 : NCDFTokenizeArray(GetMetadataItem("Y_VALUES", "GEOLOCATION2"));
4954 0 : if (papszValues == nullptr)
4955 0 : return nullptr;
4956 :
4957 : // Initialize and fill array.
4958 0 : nVarLen = CSLCount(papszValues);
4959 : double *pdfVarValues =
4960 0 : static_cast<double *>(CPLCalloc(nVarLen, sizeof(double)));
4961 :
4962 0 : for (int i = 0, j = 0; i < nVarLen; i++)
4963 : {
4964 0 : if (!bBottomUp)
4965 0 : j = nVarLen - 1 - i;
4966 : else
4967 0 : j = i; // Invert latitude values.
4968 0 : char *pszTemp = nullptr;
4969 0 : pdfVarValues[j] = CPLStrtod(papszValues[i], &pszTemp);
4970 : }
4971 0 : CSLDestroy(papszValues);
4972 :
4973 0 : return pdfVarValues;
4974 : }
4975 :
4976 : /************************************************************************/
4977 : /* SetSpatialRefNoUpdate() */
4978 : /************************************************************************/
4979 :
4980 252 : void netCDFDataset::SetSpatialRefNoUpdate(const OGRSpatialReference *poSRS)
4981 : {
4982 252 : m_oSRS.Clear();
4983 252 : if (poSRS)
4984 245 : m_oSRS = *poSRS;
4985 252 : m_bHasProjection = true;
4986 252 : }
4987 :
4988 : /************************************************************************/
4989 : /* SetSpatialRef() */
4990 : /************************************************************************/
4991 :
4992 75 : CPLErr netCDFDataset::SetSpatialRef(const OGRSpatialReference *poSRS)
4993 : {
4994 150 : CPLMutexHolderD(&hNCMutex);
4995 :
4996 75 : if (GetAccess() != GA_Update || m_bHasProjection)
4997 : {
4998 0 : CPLError(CE_Failure, CPLE_AppDefined,
4999 : "netCDFDataset::_SetProjection() should only be called once "
5000 : "in update mode!");
5001 0 : return CE_Failure;
5002 : }
5003 :
5004 75 : if (m_bHasGeoTransform)
5005 : {
5006 32 : SetSpatialRefNoUpdate(poSRS);
5007 :
5008 : // For NC4/NC4C, writing both projection variables and data,
5009 : // followed by redefining nodata value, cancels the projection
5010 : // info from the Band variable, so for now only write the
5011 : // variable definitions, and write data at the end.
5012 : // See https://trac.osgeo.org/gdal/ticket/7245
5013 32 : return AddProjectionVars(true, nullptr, nullptr);
5014 : }
5015 :
5016 43 : SetSpatialRefNoUpdate(poSRS);
5017 :
5018 43 : return CE_None;
5019 : }
5020 :
5021 : /************************************************************************/
5022 : /* SetGeoTransformNoUpdate() */
5023 : /************************************************************************/
5024 :
5025 272 : void netCDFDataset::SetGeoTransformNoUpdate(double *padfTransform)
5026 : {
5027 272 : memcpy(m_adfGeoTransform, padfTransform, sizeof(double) * 6);
5028 272 : m_bHasGeoTransform = true;
5029 272 : }
5030 :
5031 : /************************************************************************/
5032 : /* SetGeoTransform() */
5033 : /************************************************************************/
5034 :
5035 76 : CPLErr netCDFDataset::SetGeoTransform(double *padfTransform)
5036 : {
5037 152 : CPLMutexHolderD(&hNCMutex);
5038 :
5039 76 : if (GetAccess() != GA_Update || m_bHasGeoTransform)
5040 : {
5041 0 : CPLError(CE_Failure, CPLE_AppDefined,
5042 : "netCDFDataset::SetGeoTransform() should only be called once "
5043 : "in update mode!");
5044 0 : return CE_Failure;
5045 : }
5046 :
5047 76 : CPLDebug("GDAL_netCDF", "SetGeoTransform(%f,%f,%f,%f,%f,%f)",
5048 76 : padfTransform[0], padfTransform[1], padfTransform[2],
5049 76 : padfTransform[3], padfTransform[4], padfTransform[5]);
5050 :
5051 76 : if (m_bHasProjection)
5052 : {
5053 3 : SetGeoTransformNoUpdate(padfTransform);
5054 :
5055 : // For NC4/NC4C, writing both projection variables and data,
5056 : // followed by redefining nodata value, cancels the projection
5057 : // info from the Band variable, so for now only write the
5058 : // variable definitions, and write data at the end.
5059 : // See https://trac.osgeo.org/gdal/ticket/7245
5060 3 : return AddProjectionVars(true, nullptr, nullptr);
5061 : }
5062 :
5063 73 : SetGeoTransformNoUpdate(padfTransform);
5064 73 : return CE_None;
5065 : }
5066 :
5067 : /************************************************************************/
5068 : /* NCDFWriteSRSVariable() */
5069 : /************************************************************************/
5070 :
5071 127 : int NCDFWriteSRSVariable(int cdfid, const OGRSpatialReference *poSRS,
5072 : char **ppszCFProjection, bool bWriteGDALTags,
5073 : const std::string &srsVarName)
5074 : {
5075 127 : char *pszCFProjection = nullptr;
5076 127 : char **papszKeyValues = nullptr;
5077 127 : poSRS->exportToCF1(&pszCFProjection, &papszKeyValues, nullptr, nullptr);
5078 :
5079 127 : if (bWriteGDALTags)
5080 : {
5081 126 : const char *pszWKT = CSLFetchNameValue(papszKeyValues, NCDF_CRS_WKT);
5082 126 : if (pszWKT)
5083 : {
5084 : // SPATIAL_REF is deprecated. Will be removed in GDAL 4.
5085 126 : papszKeyValues =
5086 126 : CSLSetNameValue(papszKeyValues, NCDF_SPATIAL_REF, pszWKT);
5087 : }
5088 : }
5089 :
5090 127 : const int nValues = CSLCount(papszKeyValues);
5091 :
5092 : int NCDFVarID;
5093 254 : std::string varNameRadix(pszCFProjection);
5094 127 : int nCounter = 2;
5095 : while (true)
5096 : {
5097 129 : NCDFVarID = -1;
5098 129 : nc_inq_varid(cdfid, pszCFProjection, &NCDFVarID);
5099 129 : if (NCDFVarID < 0)
5100 124 : break;
5101 :
5102 5 : int nbAttr = 0;
5103 5 : NCDF_ERR(nc_inq_varnatts(cdfid, NCDFVarID, &nbAttr));
5104 5 : bool bSame = nbAttr == nValues;
5105 41 : for (int i = 0; bSame && (i < nbAttr); i++)
5106 : {
5107 : char szAttrName[NC_MAX_NAME + 1];
5108 38 : szAttrName[0] = 0;
5109 38 : NCDF_ERR(nc_inq_attname(cdfid, NCDFVarID, i, szAttrName));
5110 :
5111 : const char *pszValue =
5112 38 : CSLFetchNameValue(papszKeyValues, szAttrName);
5113 38 : if (!pszValue)
5114 : {
5115 0 : bSame = false;
5116 2 : break;
5117 : }
5118 :
5119 38 : nc_type atttype = NC_NAT;
5120 38 : size_t attlen = 0;
5121 38 : NCDF_ERR(
5122 : nc_inq_att(cdfid, NCDFVarID, szAttrName, &atttype, &attlen));
5123 38 : if (atttype != NC_CHAR && atttype != NC_DOUBLE)
5124 : {
5125 0 : bSame = false;
5126 0 : break;
5127 : }
5128 38 : if (atttype == NC_CHAR)
5129 : {
5130 15 : if (CPLGetValueType(pszValue) != CPL_VALUE_STRING)
5131 : {
5132 0 : bSame = false;
5133 0 : break;
5134 : }
5135 15 : std::string val;
5136 15 : val.resize(attlen);
5137 15 : nc_get_att_text(cdfid, NCDFVarID, szAttrName, &val[0]);
5138 15 : if (val != pszValue)
5139 : {
5140 0 : bSame = false;
5141 0 : break;
5142 : }
5143 : }
5144 : else
5145 : {
5146 : const CPLStringList aosTokens(
5147 23 : CSLTokenizeString2(pszValue, ",", 0));
5148 23 : if (static_cast<size_t>(aosTokens.size()) != attlen)
5149 : {
5150 0 : bSame = false;
5151 0 : break;
5152 : }
5153 : double vals[2];
5154 23 : nc_get_att_double(cdfid, NCDFVarID, szAttrName, vals);
5155 44 : if (vals[0] != CPLAtof(aosTokens[0]) ||
5156 21 : (attlen == 2 && vals[1] != CPLAtof(aosTokens[1])))
5157 : {
5158 2 : bSame = false;
5159 2 : break;
5160 : }
5161 : }
5162 : }
5163 5 : if (bSame)
5164 : {
5165 3 : *ppszCFProjection = pszCFProjection;
5166 3 : CSLDestroy(papszKeyValues);
5167 3 : return NCDFVarID;
5168 : }
5169 2 : CPLFree(pszCFProjection);
5170 2 : pszCFProjection =
5171 2 : CPLStrdup(CPLSPrintf("%s_%d", varNameRadix.c_str(), nCounter));
5172 2 : nCounter++;
5173 2 : }
5174 :
5175 124 : *ppszCFProjection = pszCFProjection;
5176 :
5177 : const char *pszVarName;
5178 :
5179 124 : if (srsVarName != "")
5180 : {
5181 38 : pszVarName = srsVarName.c_str();
5182 : }
5183 : else
5184 : {
5185 86 : pszVarName = pszCFProjection;
5186 : }
5187 :
5188 124 : int status = nc_def_var(cdfid, pszVarName, NC_CHAR, 0, nullptr, &NCDFVarID);
5189 124 : NCDF_ERR(status);
5190 1191 : for (int i = 0; i < nValues; ++i)
5191 : {
5192 1067 : char *pszKey = nullptr;
5193 1067 : const char *pszValue = CPLParseNameValue(papszKeyValues[i], &pszKey);
5194 1067 : if (pszKey && pszValue)
5195 : {
5196 2134 : const CPLStringList aosTokens(CSLTokenizeString2(pszValue, ",", 0));
5197 1067 : double adfValues[2] = {0, 0};
5198 1067 : const int nDoubleCount = std::min(2, aosTokens.size());
5199 1067 : if (!(aosTokens.size() == 2 &&
5200 2133 : CPLGetValueType(aosTokens[0]) != CPL_VALUE_STRING) &&
5201 1066 : CPLGetValueType(pszValue) == CPL_VALUE_STRING)
5202 : {
5203 495 : status = nc_put_att_text(cdfid, NCDFVarID, pszKey,
5204 : strlen(pszValue), pszValue);
5205 : }
5206 : else
5207 : {
5208 1145 : for (int j = 0; j < nDoubleCount; ++j)
5209 573 : adfValues[j] = CPLAtof(aosTokens[j]);
5210 572 : status = nc_put_att_double(cdfid, NCDFVarID, pszKey, NC_DOUBLE,
5211 : nDoubleCount, adfValues);
5212 : }
5213 1067 : NCDF_ERR(status);
5214 : }
5215 1067 : CPLFree(pszKey);
5216 : }
5217 :
5218 124 : CSLDestroy(papszKeyValues);
5219 124 : return NCDFVarID;
5220 : }
5221 :
5222 : /************************************************************************/
5223 : /* NCDFWriteLonLatVarsAttributes() */
5224 : /************************************************************************/
5225 :
5226 100 : void NCDFWriteLonLatVarsAttributes(nccfdriver::netCDFVID &vcdf, int nVarLonID,
5227 : int nVarLatID)
5228 : {
5229 :
5230 : try
5231 : {
5232 100 : vcdf.nc_put_vatt_text(nVarLatID, CF_STD_NAME, CF_LATITUDE_STD_NAME);
5233 100 : vcdf.nc_put_vatt_text(nVarLatID, CF_LNG_NAME, CF_LATITUDE_LNG_NAME);
5234 100 : vcdf.nc_put_vatt_text(nVarLatID, CF_UNITS, CF_DEGREES_NORTH);
5235 100 : vcdf.nc_put_vatt_text(nVarLonID, CF_STD_NAME, CF_LONGITUDE_STD_NAME);
5236 100 : vcdf.nc_put_vatt_text(nVarLonID, CF_LNG_NAME, CF_LONGITUDE_LNG_NAME);
5237 100 : vcdf.nc_put_vatt_text(nVarLonID, CF_UNITS, CF_DEGREES_EAST);
5238 : }
5239 0 : catch (nccfdriver::SG_Exception &e)
5240 : {
5241 0 : CPLError(CE_Failure, CPLE_FileIO, "%s", e.get_err_msg());
5242 : }
5243 100 : }
5244 :
5245 : /************************************************************************/
5246 : /* NCDFWriteRLonRLatVarsAttributes() */
5247 : /************************************************************************/
5248 :
5249 0 : void NCDFWriteRLonRLatVarsAttributes(nccfdriver::netCDFVID &vcdf,
5250 : int nVarRLonID, int nVarRLatID)
5251 : {
5252 : try
5253 : {
5254 0 : vcdf.nc_put_vatt_text(nVarRLatID, CF_STD_NAME, "grid_latitude");
5255 0 : vcdf.nc_put_vatt_text(nVarRLatID, CF_LNG_NAME,
5256 : "latitude in rotated pole grid");
5257 0 : vcdf.nc_put_vatt_text(nVarRLatID, CF_UNITS, "degrees");
5258 0 : vcdf.nc_put_vatt_text(nVarRLatID, CF_AXIS, "Y");
5259 :
5260 0 : vcdf.nc_put_vatt_text(nVarRLonID, CF_STD_NAME, "grid_longitude");
5261 0 : vcdf.nc_put_vatt_text(nVarRLonID, CF_LNG_NAME,
5262 : "longitude in rotated pole grid");
5263 0 : vcdf.nc_put_vatt_text(nVarRLonID, CF_UNITS, "degrees");
5264 0 : vcdf.nc_put_vatt_text(nVarRLonID, CF_AXIS, "X");
5265 : }
5266 0 : catch (nccfdriver::SG_Exception &e)
5267 : {
5268 0 : CPLError(CE_Failure, CPLE_FileIO, "%s", e.get_err_msg());
5269 : }
5270 0 : }
5271 :
5272 : /************************************************************************/
5273 : /* NCDFGetProjectedCFUnit() */
5274 : /************************************************************************/
5275 :
5276 40 : std::string NCDFGetProjectedCFUnit(const OGRSpatialReference *poSRS)
5277 : {
5278 40 : char *pszUnitsToWrite = nullptr;
5279 40 : poSRS->exportToCF1(nullptr, nullptr, &pszUnitsToWrite, nullptr);
5280 40 : const std::string osRet = pszUnitsToWrite ? pszUnitsToWrite : std::string();
5281 40 : CPLFree(pszUnitsToWrite);
5282 80 : return osRet;
5283 : }
5284 :
5285 : /************************************************************************/
5286 : /* NCDFWriteXYVarsAttributes() */
5287 : /************************************************************************/
5288 :
5289 29 : void NCDFWriteXYVarsAttributes(nccfdriver::netCDFVID &vcdf, int nVarXID,
5290 : int nVarYID, const OGRSpatialReference *poSRS)
5291 : {
5292 58 : const std::string osUnitsToWrite = NCDFGetProjectedCFUnit(poSRS);
5293 :
5294 : try
5295 : {
5296 29 : vcdf.nc_put_vatt_text(nVarXID, CF_STD_NAME, CF_PROJ_X_COORD);
5297 29 : vcdf.nc_put_vatt_text(nVarXID, CF_LNG_NAME, CF_PROJ_X_COORD_LONG_NAME);
5298 29 : if (!osUnitsToWrite.empty())
5299 29 : vcdf.nc_put_vatt_text(nVarXID, CF_UNITS, osUnitsToWrite.c_str());
5300 29 : vcdf.nc_put_vatt_text(nVarYID, CF_STD_NAME, CF_PROJ_Y_COORD);
5301 29 : vcdf.nc_put_vatt_text(nVarYID, CF_LNG_NAME, CF_PROJ_Y_COORD_LONG_NAME);
5302 29 : if (!osUnitsToWrite.empty())
5303 29 : vcdf.nc_put_vatt_text(nVarYID, CF_UNITS, osUnitsToWrite.c_str());
5304 : }
5305 0 : catch (nccfdriver::SG_Exception &e)
5306 : {
5307 0 : CPLError(CE_Failure, CPLE_FileIO, "%s", e.get_err_msg());
5308 : }
5309 29 : }
5310 :
5311 : /************************************************************************/
5312 : /* AddProjectionVars() */
5313 : /************************************************************************/
5314 :
5315 162 : CPLErr netCDFDataset::AddProjectionVars(bool bDefsOnly,
5316 : GDALProgressFunc pfnProgress,
5317 : void *pProgressData)
5318 : {
5319 162 : if (nCFVersion >= 1.8)
5320 0 : return CE_None; // do nothing
5321 :
5322 162 : bool bWriteGridMapping = false;
5323 162 : bool bWriteLonLat = false;
5324 162 : bool bHasGeoloc = false;
5325 162 : bool bWriteGDALTags = false;
5326 162 : bool bWriteGeoTransform = false;
5327 :
5328 : // For GEOLOCATION information.
5329 162 : GDALDatasetH hDS_X = nullptr;
5330 162 : GDALRasterBandH hBand_X = nullptr;
5331 162 : GDALDatasetH hDS_Y = nullptr;
5332 162 : GDALRasterBandH hBand_Y = nullptr;
5333 :
5334 324 : OGRSpatialReference oSRS(m_oSRS);
5335 162 : if (!m_oSRS.IsEmpty())
5336 : {
5337 136 : if (oSRS.IsProjected())
5338 50 : bIsProjected = true;
5339 86 : else if (oSRS.IsGeographic())
5340 86 : bIsGeographic = true;
5341 : }
5342 :
5343 162 : if (bDefsOnly)
5344 : {
5345 81 : char *pszProjection = nullptr;
5346 81 : m_oSRS.exportToWkt(&pszProjection);
5347 81 : CPLDebug("GDAL_netCDF",
5348 : "SetProjection, WKT now = [%s]\nprojected: %d geographic: %d",
5349 81 : pszProjection ? pszProjection : "(null)",
5350 81 : static_cast<int>(bIsProjected),
5351 81 : static_cast<int>(bIsGeographic));
5352 81 : CPLFree(pszProjection);
5353 :
5354 81 : if (!m_bHasGeoTransform)
5355 5 : CPLDebug("GDAL_netCDF",
5356 : "netCDFDataset::AddProjectionVars() called, "
5357 : "but GeoTransform has not yet been defined!");
5358 :
5359 81 : if (!m_bHasProjection)
5360 6 : CPLDebug("GDAL_netCDF",
5361 : "netCDFDataset::AddProjectionVars() called, "
5362 : "but Projection has not yet been defined!");
5363 : }
5364 :
5365 : // Check GEOLOCATION information.
5366 162 : char **papszGeolocationInfo = netCDFDataset::GetMetadata("GEOLOCATION");
5367 162 : if (papszGeolocationInfo != nullptr)
5368 : {
5369 : // Look for geolocation datasets.
5370 : const char *pszDSName =
5371 10 : CSLFetchNameValue(papszGeolocationInfo, "X_DATASET");
5372 10 : if (pszDSName != nullptr)
5373 10 : hDS_X = GDALOpenShared(pszDSName, GA_ReadOnly);
5374 10 : pszDSName = CSLFetchNameValue(papszGeolocationInfo, "Y_DATASET");
5375 10 : if (pszDSName != nullptr)
5376 10 : hDS_Y = GDALOpenShared(pszDSName, GA_ReadOnly);
5377 :
5378 10 : if (hDS_X != nullptr && hDS_Y != nullptr)
5379 : {
5380 10 : int nBand = std::max(1, atoi(CSLFetchNameValueDef(
5381 10 : papszGeolocationInfo, "X_BAND", "0")));
5382 10 : hBand_X = GDALGetRasterBand(hDS_X, nBand);
5383 10 : nBand = std::max(1, atoi(CSLFetchNameValueDef(papszGeolocationInfo,
5384 10 : "Y_BAND", "0")));
5385 10 : hBand_Y = GDALGetRasterBand(hDS_Y, nBand);
5386 :
5387 : // If geoloc bands are found, do basic validation based on their
5388 : // dimensions.
5389 10 : if (hBand_X != nullptr && hBand_Y != nullptr)
5390 : {
5391 10 : int nXSize_XBand = GDALGetRasterXSize(hDS_X);
5392 10 : int nYSize_XBand = GDALGetRasterYSize(hDS_X);
5393 10 : int nXSize_YBand = GDALGetRasterXSize(hDS_Y);
5394 10 : int nYSize_YBand = GDALGetRasterYSize(hDS_Y);
5395 :
5396 : // TODO 1D geolocation arrays not implemented.
5397 10 : if (nYSize_XBand == 1 && nYSize_YBand == 1)
5398 : {
5399 0 : bHasGeoloc = false;
5400 0 : CPLDebug("GDAL_netCDF",
5401 : "1D GEOLOCATION arrays not supported yet");
5402 : }
5403 : // 2D bands must have same sizes as the raster bands.
5404 10 : else if (nXSize_XBand != nRasterXSize ||
5405 10 : nYSize_XBand != nRasterYSize ||
5406 10 : nXSize_YBand != nRasterXSize ||
5407 10 : nYSize_YBand != nRasterYSize)
5408 : {
5409 0 : bHasGeoloc = false;
5410 0 : CPLDebug("GDAL_netCDF",
5411 : "GEOLOCATION array sizes (%dx%d %dx%d) differ "
5412 : "from raster (%dx%d), not supported",
5413 : nXSize_XBand, nYSize_XBand, nXSize_YBand,
5414 : nYSize_YBand, nRasterXSize, nRasterYSize);
5415 : }
5416 : else
5417 : {
5418 10 : bHasGeoloc = true;
5419 10 : CPLDebug("GDAL_netCDF",
5420 : "dataset has GEOLOCATION information, will try to "
5421 : "write it");
5422 : }
5423 : }
5424 : }
5425 : }
5426 :
5427 : // Process projection options.
5428 162 : if (bIsProjected)
5429 : {
5430 : bool bIsCfProjection =
5431 50 : oSRS.exportToCF1(nullptr, nullptr, nullptr, nullptr) == OGRERR_NONE;
5432 50 : bWriteGridMapping = true;
5433 50 : bWriteGDALTags = CPL_TO_BOOL(
5434 50 : CSLFetchBoolean(papszCreationOptions, "WRITE_GDAL_TAGS", TRUE));
5435 : // Force WRITE_GDAL_TAGS if is not a CF projection.
5436 50 : if (!bWriteGDALTags && !bIsCfProjection)
5437 0 : bWriteGDALTags = true;
5438 50 : if (bWriteGDALTags)
5439 50 : bWriteGeoTransform = true;
5440 :
5441 : // Write lon/lat: default is NO, except if has geolocation.
5442 : // With IF_NEEDED: write if has geoloc or is not CF projection.
5443 : const char *pszValue =
5444 50 : CSLFetchNameValue(papszCreationOptions, "WRITE_LONLAT");
5445 50 : if (pszValue)
5446 : {
5447 2 : if (EQUAL(pszValue, "IF_NEEDED"))
5448 : {
5449 0 : bWriteLonLat = bHasGeoloc || !bIsCfProjection;
5450 : }
5451 : else
5452 : {
5453 2 : bWriteLonLat = CPLTestBool(pszValue);
5454 : }
5455 : }
5456 : else
5457 : {
5458 48 : bWriteLonLat = bHasGeoloc;
5459 : }
5460 :
5461 : // Save value of pszCFCoordinates for later.
5462 50 : if (bWriteLonLat)
5463 : {
5464 4 : pszCFCoordinates = NCDF_LONLAT;
5465 : }
5466 : }
5467 : else
5468 : {
5469 : // Files without a Datum will not have a grid_mapping variable and
5470 : // geographic information.
5471 112 : bWriteGridMapping = bIsGeographic;
5472 :
5473 112 : if (bHasGeoloc)
5474 : {
5475 8 : bWriteLonLat = true;
5476 : }
5477 : else
5478 : {
5479 104 : bWriteGDALTags = CPL_TO_BOOL(CSLFetchBoolean(
5480 104 : papszCreationOptions, "WRITE_GDAL_TAGS", bWriteGridMapping));
5481 104 : if (bWriteGDALTags)
5482 86 : bWriteGeoTransform = true;
5483 :
5484 104 : const char *pszValue = CSLFetchNameValueDef(papszCreationOptions,
5485 : "WRITE_LONLAT", "YES");
5486 104 : if (EQUAL(pszValue, "IF_NEEDED"))
5487 0 : bWriteLonLat = true;
5488 : else
5489 104 : bWriteLonLat = CPLTestBool(pszValue);
5490 : // Don't write lon/lat if no source geotransform.
5491 104 : if (!m_bHasGeoTransform)
5492 0 : bWriteLonLat = false;
5493 : // If we don't write lon/lat, set dimnames to X/Y and write gdal
5494 : // tags.
5495 104 : if (!bWriteLonLat)
5496 : {
5497 0 : CPLError(CE_Warning, CPLE_AppDefined,
5498 : "creating geographic file without lon/lat values!");
5499 0 : if (m_bHasGeoTransform)
5500 : {
5501 0 : bWriteGDALTags = true; // Not desirable if no geotransform.
5502 0 : bWriteGeoTransform = true;
5503 : }
5504 : }
5505 : }
5506 : }
5507 :
5508 : // Make sure we write grid_mapping if we need to write GDAL tags.
5509 162 : if (bWriteGDALTags)
5510 136 : bWriteGridMapping = true;
5511 :
5512 : // bottom-up value: new driver is bottom-up by default.
5513 : // Override with WRITE_BOTTOMUP.
5514 162 : bBottomUp = CPL_TO_BOOL(
5515 162 : CSLFetchBoolean(papszCreationOptions, "WRITE_BOTTOMUP", TRUE));
5516 :
5517 162 : if (bDefsOnly)
5518 : {
5519 81 : CPLDebug(
5520 : "GDAL_netCDF",
5521 : "bIsProjected=%d bIsGeographic=%d bWriteGridMapping=%d "
5522 : "bWriteGDALTags=%d bWriteLonLat=%d bBottomUp=%d bHasGeoloc=%d",
5523 81 : static_cast<int>(bIsProjected), static_cast<int>(bIsGeographic),
5524 : static_cast<int>(bWriteGridMapping),
5525 : static_cast<int>(bWriteGDALTags), static_cast<int>(bWriteLonLat),
5526 81 : static_cast<int>(bBottomUp), static_cast<int>(bHasGeoloc));
5527 : }
5528 :
5529 : // Exit if nothing to do.
5530 162 : if (!bIsProjected && !bWriteLonLat)
5531 0 : return CE_None;
5532 :
5533 : // Define dimension names.
5534 :
5535 162 : constexpr const char *ROTATED_POLE_VAR_NAME = "rotated_pole";
5536 :
5537 162 : if (bDefsOnly)
5538 : {
5539 81 : int nVarLonID = -1;
5540 81 : int nVarLatID = -1;
5541 81 : int nVarXID = -1;
5542 81 : int nVarYID = -1;
5543 :
5544 81 : m_bAddedProjectionVarsDefs = true;
5545 :
5546 : // Make sure we are in define mode.
5547 81 : SetDefineMode(true);
5548 :
5549 : // Write projection attributes.
5550 81 : if (bWriteGridMapping)
5551 : {
5552 68 : const int NCDFVarID = NCDFWriteSRSVariable(
5553 : cdfid, &oSRS, &pszCFProjection, bWriteGDALTags);
5554 68 : if (NCDFVarID < 0)
5555 0 : return CE_Failure;
5556 :
5557 : // Optional GDAL custom projection tags.
5558 68 : if (bWriteGDALTags)
5559 : {
5560 136 : CPLString osGeoTransform;
5561 476 : for (int i = 0; i < 6; i++)
5562 : {
5563 : osGeoTransform +=
5564 408 : CPLSPrintf("%.16g ", m_adfGeoTransform[i]);
5565 : }
5566 68 : CPLDebug("GDAL_netCDF", "szGeoTransform = %s",
5567 : osGeoTransform.c_str());
5568 :
5569 : // if( strlen(pszProj4Defn) > 0 ) {
5570 : // nc_put_att_text(cdfid, NCDFVarID, "proj4",
5571 : // strlen(pszProj4Defn), pszProj4Defn);
5572 : // }
5573 :
5574 : // For now, write the geotransform for back-compat or else
5575 : // the old (1.8.1) driver overrides the CF geotransform with
5576 : // empty values from dfNN, dfSN, dfEE, dfWE;
5577 :
5578 : // TODO: fix this in 1.8 branch, and then remove this here.
5579 68 : if (bWriteGeoTransform && m_bHasGeoTransform)
5580 : {
5581 : {
5582 67 : const int status = nc_put_att_text(
5583 : cdfid, NCDFVarID, NCDF_GEOTRANSFORM,
5584 : osGeoTransform.size(), osGeoTransform.c_str());
5585 67 : NCDF_ERR(status);
5586 : }
5587 : }
5588 : }
5589 :
5590 : // Write projection variable to band variable.
5591 : // Need to call later if there are no bands.
5592 68 : AddGridMappingRef();
5593 : } // end if( bWriteGridMapping )
5594 :
5595 : // Write CF Projection vars.
5596 :
5597 81 : const bool bIsRotatedPole =
5598 149 : pszCFProjection != nullptr &&
5599 68 : EQUAL(pszCFProjection, ROTATED_POLE_VAR_NAME);
5600 81 : if (bIsRotatedPole)
5601 : {
5602 : // Rename dims to rlat/rlon.
5603 : papszDimName
5604 0 : .Clear(); // If we add other dims one day, this has to change
5605 0 : papszDimName.AddString(NCDF_DIMNAME_RLAT);
5606 0 : papszDimName.AddString(NCDF_DIMNAME_RLON);
5607 :
5608 0 : int status = nc_rename_dim(cdfid, nYDimID, NCDF_DIMNAME_RLAT);
5609 0 : NCDF_ERR(status);
5610 0 : status = nc_rename_dim(cdfid, nXDimID, NCDF_DIMNAME_RLON);
5611 0 : NCDF_ERR(status);
5612 : }
5613 : // Rename dimensions if lon/lat.
5614 81 : else if (!bIsProjected && !bHasGeoloc)
5615 : {
5616 : // Rename dims to lat/lon.
5617 : papszDimName
5618 52 : .Clear(); // If we add other dims one day, this has to change
5619 52 : papszDimName.AddString(NCDF_DIMNAME_LAT);
5620 52 : papszDimName.AddString(NCDF_DIMNAME_LON);
5621 :
5622 52 : int status = nc_rename_dim(cdfid, nYDimID, NCDF_DIMNAME_LAT);
5623 52 : NCDF_ERR(status);
5624 52 : status = nc_rename_dim(cdfid, nXDimID, NCDF_DIMNAME_LON);
5625 52 : NCDF_ERR(status);
5626 : }
5627 :
5628 : // Write X/Y attributes.
5629 : else /* if( bIsProjected || bHasGeoloc ) */
5630 : {
5631 : // X
5632 : int anXDims[1];
5633 29 : anXDims[0] = nXDimID;
5634 29 : CPLDebug("GDAL_netCDF", "nc_def_var(%d,%s,%d)", cdfid,
5635 : CF_PROJ_X_VAR_NAME, NC_DOUBLE);
5636 29 : int status = nc_def_var(cdfid, CF_PROJ_X_VAR_NAME, NC_DOUBLE, 1,
5637 : anXDims, &nVarXID);
5638 29 : NCDF_ERR(status);
5639 :
5640 : // Y
5641 : int anYDims[1];
5642 29 : anYDims[0] = nYDimID;
5643 29 : CPLDebug("GDAL_netCDF", "nc_def_var(%d,%s,%d)", cdfid,
5644 : CF_PROJ_Y_VAR_NAME, NC_DOUBLE);
5645 29 : status = nc_def_var(cdfid, CF_PROJ_Y_VAR_NAME, NC_DOUBLE, 1,
5646 : anYDims, &nVarYID);
5647 29 : NCDF_ERR(status);
5648 :
5649 29 : if (bIsProjected)
5650 : {
5651 25 : NCDFWriteXYVarsAttributes(this->vcdf, nVarXID, nVarYID, &oSRS);
5652 : }
5653 : else
5654 : {
5655 4 : CPLAssert(bHasGeoloc);
5656 : try
5657 : {
5658 4 : vcdf.nc_put_vatt_text(nVarXID, CF_AXIS, CF_SG_X_AXIS);
5659 4 : vcdf.nc_put_vatt_text(nVarXID, CF_LNG_NAME,
5660 : "x-coordinate in Cartesian system");
5661 4 : vcdf.nc_put_vatt_text(nVarXID, CF_UNITS, "m");
5662 4 : vcdf.nc_put_vatt_text(nVarYID, CF_AXIS, CF_SG_Y_AXIS);
5663 4 : vcdf.nc_put_vatt_text(nVarYID, CF_LNG_NAME,
5664 : "y-coordinate in Cartesian system");
5665 4 : vcdf.nc_put_vatt_text(nVarYID, CF_UNITS, "m");
5666 :
5667 4 : pszCFCoordinates = NCDF_LONLAT;
5668 : }
5669 0 : catch (nccfdriver::SG_Exception &e)
5670 : {
5671 0 : CPLError(CE_Failure, CPLE_FileIO, "%s", e.get_err_msg());
5672 0 : return CE_Failure;
5673 : }
5674 : }
5675 : }
5676 :
5677 : // Write lat/lon attributes if needed.
5678 81 : if (bWriteLonLat)
5679 : {
5680 58 : int *panLatDims = nullptr;
5681 58 : int *panLonDims = nullptr;
5682 58 : int nLatDims = -1;
5683 58 : int nLonDims = -1;
5684 :
5685 : // Get information.
5686 58 : if (bHasGeoloc)
5687 : {
5688 : // Geoloc
5689 5 : nLatDims = 2;
5690 : panLatDims =
5691 5 : static_cast<int *>(CPLCalloc(nLatDims, sizeof(int)));
5692 5 : panLatDims[0] = nYDimID;
5693 5 : panLatDims[1] = nXDimID;
5694 5 : nLonDims = 2;
5695 : panLonDims =
5696 5 : static_cast<int *>(CPLCalloc(nLonDims, sizeof(int)));
5697 5 : panLonDims[0] = nYDimID;
5698 5 : panLonDims[1] = nXDimID;
5699 : }
5700 53 : else if (bIsProjected)
5701 : {
5702 : // Projected
5703 1 : nLatDims = 2;
5704 : panLatDims =
5705 1 : static_cast<int *>(CPLCalloc(nLatDims, sizeof(int)));
5706 1 : panLatDims[0] = nYDimID;
5707 1 : panLatDims[1] = nXDimID;
5708 1 : nLonDims = 2;
5709 : panLonDims =
5710 1 : static_cast<int *>(CPLCalloc(nLonDims, sizeof(int)));
5711 1 : panLonDims[0] = nYDimID;
5712 1 : panLonDims[1] = nXDimID;
5713 : }
5714 : else
5715 : {
5716 : // Geographic
5717 52 : nLatDims = 1;
5718 : panLatDims =
5719 52 : static_cast<int *>(CPLCalloc(nLatDims, sizeof(int)));
5720 52 : panLatDims[0] = nYDimID;
5721 52 : nLonDims = 1;
5722 : panLonDims =
5723 52 : static_cast<int *>(CPLCalloc(nLonDims, sizeof(int)));
5724 52 : panLonDims[0] = nXDimID;
5725 : }
5726 :
5727 58 : nc_type eLonLatType = NC_NAT;
5728 58 : if (bIsProjected)
5729 : {
5730 2 : eLonLatType = NC_FLOAT;
5731 4 : const char *pszValue = CSLFetchNameValueDef(
5732 2 : papszCreationOptions, "TYPE_LONLAT", "FLOAT");
5733 2 : if (EQUAL(pszValue, "DOUBLE"))
5734 0 : eLonLatType = NC_DOUBLE;
5735 : }
5736 : else
5737 : {
5738 56 : eLonLatType = NC_DOUBLE;
5739 112 : const char *pszValue = CSLFetchNameValueDef(
5740 56 : papszCreationOptions, "TYPE_LONLAT", "DOUBLE");
5741 56 : if (EQUAL(pszValue, "FLOAT"))
5742 0 : eLonLatType = NC_FLOAT;
5743 : }
5744 :
5745 : // Def vars and attributes.
5746 : {
5747 58 : const char *pszVarName =
5748 58 : bIsRotatedPole ? NCDF_DIMNAME_RLAT : CF_LATITUDE_VAR_NAME;
5749 58 : int status = nc_def_var(cdfid, pszVarName, eLonLatType,
5750 : nLatDims, panLatDims, &nVarLatID);
5751 58 : CPLDebug("GDAL_netCDF", "nc_def_var(%d,%s,%d,%d,-,-) got id %d",
5752 : cdfid, pszVarName, eLonLatType, nLatDims, nVarLatID);
5753 58 : NCDF_ERR(status);
5754 58 : DefVarDeflate(nVarLatID, false); // Don't set chunking.
5755 : }
5756 :
5757 : {
5758 58 : const char *pszVarName =
5759 58 : bIsRotatedPole ? NCDF_DIMNAME_RLON : CF_LONGITUDE_VAR_NAME;
5760 58 : int status = nc_def_var(cdfid, pszVarName, eLonLatType,
5761 : nLonDims, panLonDims, &nVarLonID);
5762 58 : CPLDebug("GDAL_netCDF", "nc_def_var(%d,%s,%d,%d,-,-) got id %d",
5763 : cdfid, pszVarName, eLonLatType, nLatDims, nVarLonID);
5764 58 : NCDF_ERR(status);
5765 58 : DefVarDeflate(nVarLonID, false); // Don't set chunking.
5766 : }
5767 :
5768 58 : if (bIsRotatedPole)
5769 0 : NCDFWriteRLonRLatVarsAttributes(this->vcdf, nVarLonID,
5770 : nVarLatID);
5771 : else
5772 58 : NCDFWriteLonLatVarsAttributes(this->vcdf, nVarLonID, nVarLatID);
5773 :
5774 58 : CPLFree(panLatDims);
5775 58 : CPLFree(panLonDims);
5776 : }
5777 : }
5778 :
5779 162 : if (!bDefsOnly)
5780 : {
5781 81 : m_bAddedProjectionVarsData = true;
5782 :
5783 81 : int nVarXID = -1;
5784 81 : int nVarYID = -1;
5785 :
5786 81 : nc_inq_varid(cdfid, CF_PROJ_X_VAR_NAME, &nVarXID);
5787 81 : nc_inq_varid(cdfid, CF_PROJ_Y_VAR_NAME, &nVarYID);
5788 :
5789 81 : int nVarLonID = -1;
5790 81 : int nVarLatID = -1;
5791 :
5792 81 : const bool bIsRotatedPole =
5793 149 : pszCFProjection != nullptr &&
5794 68 : EQUAL(pszCFProjection, ROTATED_POLE_VAR_NAME);
5795 81 : nc_inq_varid(cdfid,
5796 : bIsRotatedPole ? NCDF_DIMNAME_RLON : CF_LONGITUDE_VAR_NAME,
5797 : &nVarLonID);
5798 81 : nc_inq_varid(cdfid,
5799 : bIsRotatedPole ? NCDF_DIMNAME_RLAT : CF_LATITUDE_VAR_NAME,
5800 : &nVarLatID);
5801 :
5802 : // Get projection values.
5803 :
5804 81 : double *padLonVal = nullptr;
5805 81 : double *padLatVal = nullptr;
5806 :
5807 81 : if (bIsProjected)
5808 : {
5809 25 : OGRSpatialReference *poLatLonSRS = nullptr;
5810 25 : OGRCoordinateTransformation *poTransform = nullptr;
5811 :
5812 : size_t startX[1];
5813 : size_t countX[1];
5814 : size_t startY[1];
5815 : size_t countY[1];
5816 :
5817 25 : CPLDebug("GDAL_netCDF", "Getting (X,Y) values");
5818 :
5819 : double *padXVal =
5820 25 : static_cast<double *>(CPLMalloc(nRasterXSize * sizeof(double)));
5821 : double *padYVal =
5822 25 : static_cast<double *>(CPLMalloc(nRasterYSize * sizeof(double)));
5823 :
5824 : // Get Y values.
5825 25 : const double dfY0 = (!bBottomUp) ? m_adfGeoTransform[3] :
5826 : // Invert latitude values.
5827 25 : m_adfGeoTransform[3] +
5828 25 : (m_adfGeoTransform[5] * nRasterYSize);
5829 25 : const double dfDY = m_adfGeoTransform[5];
5830 :
5831 1456 : for (int j = 0; j < nRasterYSize; j++)
5832 : {
5833 : // The data point is centered inside the pixel.
5834 1431 : if (!bBottomUp)
5835 0 : padYVal[j] = dfY0 + (j + 0.5) * dfDY;
5836 : else // Invert latitude values.
5837 1431 : padYVal[j] = dfY0 - (j + 0.5) * dfDY;
5838 : }
5839 25 : startX[0] = 0;
5840 25 : countX[0] = nRasterXSize;
5841 :
5842 : // Get X values.
5843 25 : const double dfX0 = m_adfGeoTransform[0];
5844 25 : const double dfDX = m_adfGeoTransform[1];
5845 :
5846 1477 : for (int i = 0; i < nRasterXSize; i++)
5847 : {
5848 : // The data point is centered inside the pixel.
5849 1452 : padXVal[i] = dfX0 + (i + 0.5) * dfDX;
5850 : }
5851 25 : startY[0] = 0;
5852 25 : countY[0] = nRasterYSize;
5853 :
5854 : // Write X/Y values.
5855 :
5856 : // Make sure we are in data mode.
5857 25 : SetDefineMode(false);
5858 :
5859 25 : CPLDebug("GDAL_netCDF", "Writing X values");
5860 : int status =
5861 25 : nc_put_vara_double(cdfid, nVarXID, startX, countX, padXVal);
5862 25 : NCDF_ERR(status);
5863 :
5864 25 : CPLDebug("GDAL_netCDF", "Writing Y values");
5865 : status =
5866 25 : nc_put_vara_double(cdfid, nVarYID, startY, countY, padYVal);
5867 25 : NCDF_ERR(status);
5868 :
5869 25 : if (pfnProgress)
5870 21 : pfnProgress(0.20, nullptr, pProgressData);
5871 :
5872 : // Write lon/lat arrays (CF coordinates) if requested.
5873 :
5874 : // Get OGR transform if GEOLOCATION is not available.
5875 25 : if (bWriteLonLat && !bHasGeoloc)
5876 : {
5877 1 : poLatLonSRS = m_oSRS.CloneGeogCS();
5878 1 : if (poLatLonSRS != nullptr)
5879 : {
5880 1 : poLatLonSRS->SetAxisMappingStrategy(
5881 : OAMS_TRADITIONAL_GIS_ORDER);
5882 : poTransform =
5883 1 : OGRCreateCoordinateTransformation(&m_oSRS, poLatLonSRS);
5884 : }
5885 : // If no OGR transform, then don't write CF lon/lat.
5886 1 : if (poTransform == nullptr)
5887 : {
5888 0 : CPLError(CE_Failure, CPLE_AppDefined,
5889 : "Unable to get Coordinate Transform");
5890 0 : bWriteLonLat = false;
5891 : }
5892 : }
5893 :
5894 25 : if (bWriteLonLat)
5895 : {
5896 2 : if (!bHasGeoloc)
5897 1 : CPLDebug("GDAL_netCDF", "Transforming (X,Y)->(lon,lat)");
5898 : else
5899 1 : CPLDebug("GDAL_netCDF",
5900 : "Writing (lon,lat) from GEOLOCATION arrays");
5901 :
5902 2 : bool bOK = true;
5903 2 : double dfProgress = 0.2;
5904 :
5905 2 : size_t start[] = {0, 0};
5906 2 : size_t count[] = {1, (size_t)nRasterXSize};
5907 : padLatVal = static_cast<double *>(
5908 2 : CPLMalloc(nRasterXSize * sizeof(double)));
5909 : padLonVal = static_cast<double *>(
5910 2 : CPLMalloc(nRasterXSize * sizeof(double)));
5911 :
5912 61 : for (int j = 0; j < nRasterYSize && bOK && status == NC_NOERR;
5913 : j++)
5914 : {
5915 59 : start[0] = j;
5916 :
5917 : // Get values from geotransform.
5918 59 : if (!bHasGeoloc)
5919 : {
5920 : // Fill values to transform.
5921 420 : for (int i = 0; i < nRasterXSize; i++)
5922 : {
5923 400 : padLatVal[i] = padYVal[j];
5924 400 : padLonVal[i] = padXVal[i];
5925 : }
5926 :
5927 : // Do the transform.
5928 20 : bOK = CPL_TO_BOOL(poTransform->Transform(
5929 20 : nRasterXSize, padLonVal, padLatVal, nullptr));
5930 20 : if (!bOK)
5931 : {
5932 0 : CPLError(CE_Failure, CPLE_AppDefined,
5933 : "Unable to Transform (X,Y) to (lon,lat).");
5934 : }
5935 : }
5936 : // Get values from geoloc arrays.
5937 : else
5938 : {
5939 39 : CPLErr eErr = GDALRasterIO(
5940 : hBand_Y, GF_Read, 0, j, nRasterXSize, 1, padLatVal,
5941 : nRasterXSize, 1, GDT_Float64, 0, 0);
5942 39 : if (eErr == CE_None)
5943 : {
5944 39 : eErr = GDALRasterIO(
5945 : hBand_X, GF_Read, 0, j, nRasterXSize, 1,
5946 : padLonVal, nRasterXSize, 1, GDT_Float64, 0, 0);
5947 : }
5948 :
5949 39 : if (eErr == CE_None)
5950 : {
5951 39 : bOK = true;
5952 : }
5953 : else
5954 : {
5955 0 : bOK = false;
5956 0 : CPLError(CE_Failure, CPLE_AppDefined,
5957 : "Unable to get scanline %d", j);
5958 : }
5959 : }
5960 :
5961 : // Write data.
5962 59 : if (bOK)
5963 : {
5964 59 : status = nc_put_vara_double(cdfid, nVarLatID, start,
5965 : count, padLatVal);
5966 59 : NCDF_ERR(status);
5967 59 : status = nc_put_vara_double(cdfid, nVarLonID, start,
5968 : count, padLonVal);
5969 59 : NCDF_ERR(status);
5970 : }
5971 :
5972 59 : if (pfnProgress && (nRasterYSize / 10) > 0 &&
5973 59 : (j % (nRasterYSize / 10) == 0))
5974 : {
5975 23 : dfProgress += 0.08;
5976 23 : pfnProgress(dfProgress, nullptr, pProgressData);
5977 : }
5978 : }
5979 : }
5980 :
5981 25 : if (poLatLonSRS != nullptr)
5982 1 : delete poLatLonSRS;
5983 25 : if (poTransform != nullptr)
5984 1 : delete poTransform;
5985 :
5986 25 : CPLFree(padXVal);
5987 25 : CPLFree(padYVal);
5988 : } // Projected
5989 :
5990 : // If not projected/geographic and has geoloc
5991 56 : else if (!bIsGeographic && bHasGeoloc)
5992 : {
5993 : // Use
5994 : // https://cfconventions.org/Data/cf-conventions/cf-conventions-1.9/cf-conventions.html#_two_dimensional_latitude_longitude_coordinate_variables
5995 :
5996 4 : bool bOK = true;
5997 4 : double dfProgress = 0.2;
5998 :
5999 : // Make sure we are in data mode.
6000 4 : SetDefineMode(false);
6001 :
6002 : size_t startX[1];
6003 : size_t countX[1];
6004 : size_t startY[1];
6005 : size_t countY[1];
6006 4 : startX[0] = 0;
6007 4 : countX[0] = nRasterXSize;
6008 :
6009 4 : startY[0] = 0;
6010 4 : countY[0] = nRasterYSize;
6011 :
6012 8 : std::vector<double> adfXVal(nRasterXSize);
6013 16 : for (int i = 0; i < nRasterXSize; i++)
6014 12 : adfXVal[i] = i;
6015 :
6016 8 : std::vector<double> adfYVal(nRasterYSize);
6017 12 : for (int i = 0; i < nRasterYSize; i++)
6018 8 : adfYVal[i] = bBottomUp ? nRasterYSize - 1 - i : i;
6019 :
6020 4 : CPLDebug("GDAL_netCDF", "Writing X values");
6021 4 : int status = nc_put_vara_double(cdfid, nVarXID, startX, countX,
6022 4 : adfXVal.data());
6023 4 : NCDF_ERR(status);
6024 :
6025 4 : CPLDebug("GDAL_netCDF", "Writing Y values");
6026 4 : status = nc_put_vara_double(cdfid, nVarYID, startY, countY,
6027 4 : adfYVal.data());
6028 4 : NCDF_ERR(status);
6029 :
6030 4 : if (pfnProgress)
6031 0 : pfnProgress(0.20, nullptr, pProgressData);
6032 :
6033 4 : size_t start[] = {0, 0};
6034 4 : size_t count[] = {1, (size_t)nRasterXSize};
6035 : padLatVal =
6036 4 : static_cast<double *>(CPLMalloc(nRasterXSize * sizeof(double)));
6037 : padLonVal =
6038 4 : static_cast<double *>(CPLMalloc(nRasterXSize * sizeof(double)));
6039 :
6040 12 : for (int j = 0; j < nRasterYSize && bOK && status == NC_NOERR; j++)
6041 : {
6042 8 : start[0] = j;
6043 :
6044 8 : CPLErr eErr = GDALRasterIO(hBand_Y, GF_Read, 0,
6045 8 : bBottomUp ? nRasterYSize - 1 - j : j,
6046 : nRasterXSize, 1, padLatVal,
6047 : nRasterXSize, 1, GDT_Float64, 0, 0);
6048 8 : if (eErr == CE_None)
6049 : {
6050 8 : eErr = GDALRasterIO(hBand_X, GF_Read, 0,
6051 8 : bBottomUp ? nRasterYSize - 1 - j : j,
6052 : nRasterXSize, 1, padLonVal,
6053 : nRasterXSize, 1, GDT_Float64, 0, 0);
6054 : }
6055 :
6056 8 : if (eErr == CE_None)
6057 : {
6058 8 : bOK = true;
6059 : }
6060 : else
6061 : {
6062 0 : bOK = false;
6063 0 : CPLError(CE_Failure, CPLE_AppDefined,
6064 : "Unable to get scanline %d", j);
6065 : }
6066 :
6067 : // Write data.
6068 8 : if (bOK)
6069 : {
6070 8 : status = nc_put_vara_double(cdfid, nVarLatID, start, count,
6071 : padLatVal);
6072 8 : NCDF_ERR(status);
6073 8 : status = nc_put_vara_double(cdfid, nVarLonID, start, count,
6074 : padLonVal);
6075 8 : NCDF_ERR(status);
6076 : }
6077 :
6078 8 : if (pfnProgress && (nRasterYSize / 10) > 0 &&
6079 0 : (j % (nRasterYSize / 10) == 0))
6080 : {
6081 0 : dfProgress += 0.08;
6082 0 : pfnProgress(dfProgress, nullptr, pProgressData);
6083 : }
6084 4 : }
6085 : }
6086 :
6087 : // If not projected, assume geographic to catch grids without Datum.
6088 52 : else if (bWriteLonLat)
6089 : {
6090 : // Get latitude values.
6091 52 : const double dfY0 = (!bBottomUp) ? m_adfGeoTransform[3] :
6092 : // Invert latitude values.
6093 52 : m_adfGeoTransform[3] +
6094 52 : (m_adfGeoTransform[5] * nRasterYSize);
6095 52 : const double dfDY = m_adfGeoTransform[5];
6096 :
6097 : // Override lat values with the ones in GEOLOCATION/Y_VALUES.
6098 52 : if (netCDFDataset::GetMetadataItem("Y_VALUES", "GEOLOCATION") !=
6099 : nullptr)
6100 : {
6101 0 : int nTemp = 0;
6102 0 : padLatVal = Get1DGeolocation("Y_VALUES", nTemp);
6103 : // Make sure we got the correct amount, if not fallback to GT */
6104 : // could add test fabs(fabs(padLatVal[0]) - fabs(dfY0)) <= 0.1))
6105 0 : if (nTemp == nRasterYSize)
6106 : {
6107 0 : CPLDebug(
6108 : "GDAL_netCDF",
6109 : "Using Y_VALUES geolocation metadata for lat values");
6110 : }
6111 : else
6112 : {
6113 0 : CPLDebug("GDAL_netCDF",
6114 : "Got %d elements from Y_VALUES geolocation "
6115 : "metadata, need %d",
6116 : nTemp, nRasterYSize);
6117 0 : if (padLatVal)
6118 : {
6119 0 : CPLFree(padLatVal);
6120 0 : padLatVal = nullptr;
6121 : }
6122 : }
6123 : }
6124 :
6125 52 : if (padLatVal == nullptr)
6126 : {
6127 : padLatVal = static_cast<double *>(
6128 52 : CPLMalloc(nRasterYSize * sizeof(double)));
6129 3504 : for (int i = 0; i < nRasterYSize; i++)
6130 : {
6131 : // The data point is centered inside the pixel.
6132 3452 : if (!bBottomUp)
6133 0 : padLatVal[i] = dfY0 + (i + 0.5) * dfDY;
6134 : else // Invert latitude values.
6135 3452 : padLatVal[i] = dfY0 - (i + 0.5) * dfDY;
6136 : }
6137 : }
6138 :
6139 52 : size_t startLat[1] = {0};
6140 52 : size_t countLat[1] = {static_cast<size_t>(nRasterYSize)};
6141 :
6142 : // Get longitude values.
6143 52 : const double dfX0 = m_adfGeoTransform[0];
6144 52 : const double dfDX = m_adfGeoTransform[1];
6145 :
6146 : padLonVal =
6147 52 : static_cast<double *>(CPLMalloc(nRasterXSize * sizeof(double)));
6148 3556 : for (int i = 0; i < nRasterXSize; i++)
6149 : {
6150 : // The data point is centered inside the pixel.
6151 3504 : padLonVal[i] = dfX0 + (i + 0.5) * dfDX;
6152 : }
6153 :
6154 52 : size_t startLon[1] = {0};
6155 52 : size_t countLon[1] = {static_cast<size_t>(nRasterXSize)};
6156 :
6157 : // Write latitude and longitude values.
6158 :
6159 : // Make sure we are in data mode.
6160 52 : SetDefineMode(false);
6161 :
6162 : // Write values.
6163 52 : CPLDebug("GDAL_netCDF", "Writing lat values");
6164 :
6165 52 : int status = nc_put_vara_double(cdfid, nVarLatID, startLat,
6166 : countLat, padLatVal);
6167 52 : NCDF_ERR(status);
6168 :
6169 52 : CPLDebug("GDAL_netCDF", "Writing lon values");
6170 52 : status = nc_put_vara_double(cdfid, nVarLonID, startLon, countLon,
6171 : padLonVal);
6172 52 : NCDF_ERR(status);
6173 :
6174 : } // Not projected.
6175 :
6176 81 : CPLFree(padLatVal);
6177 81 : CPLFree(padLonVal);
6178 :
6179 81 : if (pfnProgress)
6180 40 : pfnProgress(1.00, nullptr, pProgressData);
6181 : }
6182 :
6183 162 : if (hDS_X != nullptr)
6184 : {
6185 10 : GDALClose(hDS_X);
6186 : }
6187 162 : if (hDS_Y != nullptr)
6188 : {
6189 10 : GDALClose(hDS_Y);
6190 : }
6191 :
6192 162 : return CE_None;
6193 : }
6194 :
6195 : // Write Projection variable to band variable.
6196 : // Moved from AddProjectionVars() for cases when bands are added after
6197 : // projection.
6198 372 : bool netCDFDataset::AddGridMappingRef()
6199 : {
6200 372 : bool bRet = true;
6201 372 : bool bOldDefineMode = bDefineMode;
6202 :
6203 561 : if ((GetAccess() == GA_Update) && (nBands >= 1) && (GetRasterBand(1)) &&
6204 189 : ((pszCFCoordinates != nullptr && !EQUAL(pszCFCoordinates, "")) ||
6205 183 : (pszCFProjection != nullptr && !EQUAL(pszCFProjection, ""))))
6206 : {
6207 72 : bAddedGridMappingRef = true;
6208 :
6209 : // Make sure we are in define mode.
6210 72 : SetDefineMode(true);
6211 :
6212 190 : for (int i = 1; i <= nBands; i++)
6213 : {
6214 : const int nVarId =
6215 118 : static_cast<netCDFRasterBand *>(GetRasterBand(i))->nZId;
6216 :
6217 118 : if (pszCFProjection != nullptr && !EQUAL(pszCFProjection, ""))
6218 : {
6219 : int status =
6220 228 : nc_put_att_text(cdfid, nVarId, CF_GRD_MAPPING,
6221 114 : strlen(pszCFProjection), pszCFProjection);
6222 114 : NCDF_ERR(status);
6223 114 : if (status != NC_NOERR)
6224 0 : bRet = false;
6225 : }
6226 118 : if (pszCFCoordinates != nullptr && !EQUAL(pszCFCoordinates, ""))
6227 : {
6228 : int status =
6229 6 : nc_put_att_text(cdfid, nVarId, CF_COORDINATES,
6230 : strlen(pszCFCoordinates), pszCFCoordinates);
6231 6 : NCDF_ERR(status);
6232 6 : if (status != NC_NOERR)
6233 0 : bRet = false;
6234 : }
6235 : }
6236 :
6237 : // Go back to previous define mode.
6238 72 : SetDefineMode(bOldDefineMode);
6239 : }
6240 372 : return bRet;
6241 : }
6242 :
6243 : /************************************************************************/
6244 : /* GetGeoTransform() */
6245 : /************************************************************************/
6246 :
6247 107 : CPLErr netCDFDataset::GetGeoTransform(double *padfTransform)
6248 :
6249 : {
6250 107 : memcpy(padfTransform, m_adfGeoTransform, sizeof(double) * 6);
6251 107 : if (m_bHasGeoTransform)
6252 77 : return CE_None;
6253 :
6254 30 : return GDALPamDataset::GetGeoTransform(padfTransform);
6255 : }
6256 :
6257 : /************************************************************************/
6258 : /* rint() */
6259 : /************************************************************************/
6260 :
6261 0 : double netCDFDataset::rint(double dfX)
6262 : {
6263 0 : return std::round(dfX);
6264 : }
6265 :
6266 : /************************************************************************/
6267 : /* NCDFReadIsoMetadata() */
6268 : /************************************************************************/
6269 :
6270 16 : static void NCDFReadMetadataAsJson(int cdfid, CPLJSONObject &obj)
6271 : {
6272 16 : int nbAttr = 0;
6273 16 : NCDF_ERR(nc_inq_varnatts(cdfid, NC_GLOBAL, &nbAttr));
6274 :
6275 32 : std::map<std::string, CPLJSONArray> oMapNameToArray;
6276 40 : for (int l = 0; l < nbAttr; l++)
6277 : {
6278 : char szAttrName[NC_MAX_NAME + 1];
6279 24 : szAttrName[0] = 0;
6280 24 : NCDF_ERR(nc_inq_attname(cdfid, NC_GLOBAL, l, szAttrName));
6281 :
6282 24 : char *pszMetaValue = nullptr;
6283 24 : if (NCDFGetAttr(cdfid, NC_GLOBAL, szAttrName, &pszMetaValue) == CE_None)
6284 : {
6285 24 : nc_type nAttrType = NC_NAT;
6286 24 : size_t nAttrLen = 0;
6287 :
6288 24 : NCDF_ERR(nc_inq_att(cdfid, NC_GLOBAL, szAttrName, &nAttrType,
6289 : &nAttrLen));
6290 :
6291 24 : std::string osAttrName(szAttrName);
6292 24 : const auto sharpPos = osAttrName.find('#');
6293 24 : if (sharpPos == std::string::npos)
6294 : {
6295 16 : if (nAttrType == NC_DOUBLE || nAttrType == NC_FLOAT)
6296 4 : obj.Add(osAttrName, CPLAtof(pszMetaValue));
6297 : else
6298 12 : obj.Add(osAttrName, pszMetaValue);
6299 : }
6300 : else
6301 : {
6302 8 : osAttrName.resize(sharpPos);
6303 8 : auto iter = oMapNameToArray.find(osAttrName);
6304 8 : if (iter == oMapNameToArray.end())
6305 : {
6306 8 : CPLJSONArray array;
6307 4 : obj.Add(osAttrName, array);
6308 4 : oMapNameToArray[osAttrName] = array;
6309 4 : array.Add(pszMetaValue);
6310 : }
6311 : else
6312 : {
6313 4 : iter->second.Add(pszMetaValue);
6314 : }
6315 : }
6316 24 : CPLFree(pszMetaValue);
6317 24 : pszMetaValue = nullptr;
6318 : }
6319 : }
6320 :
6321 16 : int nSubGroups = 0;
6322 16 : int *panSubGroupIds = nullptr;
6323 16 : NCDFGetSubGroups(cdfid, &nSubGroups, &panSubGroupIds);
6324 16 : oMapNameToArray.clear();
6325 28 : for (int i = 0; i < nSubGroups; i++)
6326 : {
6327 24 : CPLJSONObject subObj;
6328 12 : NCDFReadMetadataAsJson(panSubGroupIds[i], subObj);
6329 :
6330 24 : std::string osGroupName;
6331 12 : osGroupName.resize(NC_MAX_NAME);
6332 12 : NCDF_ERR(nc_inq_grpname(panSubGroupIds[i], &osGroupName[0]));
6333 12 : osGroupName.resize(strlen(osGroupName.data()));
6334 12 : const auto sharpPos = osGroupName.find('#');
6335 12 : if (sharpPos == std::string::npos)
6336 : {
6337 4 : obj.Add(osGroupName, subObj);
6338 : }
6339 : else
6340 : {
6341 8 : osGroupName.resize(sharpPos);
6342 8 : auto iter = oMapNameToArray.find(osGroupName);
6343 8 : if (iter == oMapNameToArray.end())
6344 : {
6345 8 : CPLJSONArray array;
6346 4 : obj.Add(osGroupName, array);
6347 4 : oMapNameToArray[osGroupName] = array;
6348 4 : array.Add(subObj);
6349 : }
6350 : else
6351 : {
6352 4 : iter->second.Add(subObj);
6353 : }
6354 : }
6355 : }
6356 16 : CPLFree(panSubGroupIds);
6357 16 : }
6358 :
6359 4 : std::string NCDFReadMetadataAsJson(int cdfid)
6360 : {
6361 8 : CPLJSONDocument oDoc;
6362 8 : CPLJSONObject oRoot = oDoc.GetRoot();
6363 4 : NCDFReadMetadataAsJson(cdfid, oRoot);
6364 8 : return oDoc.SaveAsString();
6365 : }
6366 :
6367 : /************************************************************************/
6368 : /* ReadAttributes() */
6369 : /************************************************************************/
6370 1780 : CPLErr netCDFDataset::ReadAttributes(int cdfidIn, int var)
6371 :
6372 : {
6373 1780 : char *pszVarFullName = nullptr;
6374 1780 : ERR_RET(NCDFGetVarFullName(cdfidIn, var, &pszVarFullName));
6375 :
6376 : // For metadata in Sentinel 5
6377 1780 : if (STARTS_WITH(pszVarFullName, "/METADATA/"))
6378 : {
6379 6 : for (const char *key :
6380 : {"ISO_METADATA", "ESA_METADATA", "EOP_METADATA", "QA_STATISTICS",
6381 8 : "GRANULE_DESCRIPTION", "ALGORITHM_SETTINGS"})
6382 : {
6383 14 : if (var == NC_GLOBAL &&
6384 7 : strcmp(pszVarFullName,
6385 : CPLSPrintf("/METADATA/%s/NC_GLOBAL", key)) == 0)
6386 : {
6387 1 : CPLFree(pszVarFullName);
6388 1 : CPLStringList aosList;
6389 2 : aosList.AddString(CPLString(NCDFReadMetadataAsJson(cdfidIn))
6390 1 : .replaceAll("\\/", '/'));
6391 1 : m_oMapDomainToJSon[key] = std::move(aosList);
6392 1 : return CE_None;
6393 : }
6394 : }
6395 : }
6396 1779 : if (STARTS_WITH(pszVarFullName, "/PRODUCT/SUPPORT_DATA/"))
6397 : {
6398 0 : CPLFree(pszVarFullName);
6399 0 : CPLStringList aosList;
6400 : aosList.AddString(
6401 0 : CPLString(NCDFReadMetadataAsJson(cdfidIn)).replaceAll("\\/", '/'));
6402 0 : m_oMapDomainToJSon["SUPPORT_DATA"] = std::move(aosList);
6403 0 : return CE_None;
6404 : }
6405 :
6406 1779 : size_t nMetaNameSize =
6407 1779 : sizeof(char) * (strlen(pszVarFullName) + 1 + NC_MAX_NAME + 1);
6408 1779 : char *pszMetaName = static_cast<char *>(CPLMalloc(nMetaNameSize));
6409 :
6410 1779 : int nbAttr = 0;
6411 1779 : NCDF_ERR(nc_inq_varnatts(cdfidIn, var, &nbAttr));
6412 :
6413 8934 : for (int l = 0; l < nbAttr; l++)
6414 : {
6415 : char szAttrName[NC_MAX_NAME + 1];
6416 7155 : szAttrName[0] = 0;
6417 7155 : NCDF_ERR(nc_inq_attname(cdfidIn, var, l, szAttrName));
6418 7155 : snprintf(pszMetaName, nMetaNameSize, "%s#%s", pszVarFullName,
6419 : szAttrName);
6420 :
6421 7155 : char *pszMetaTemp = nullptr;
6422 7155 : if (NCDFGetAttr(cdfidIn, var, szAttrName, &pszMetaTemp) == CE_None)
6423 : {
6424 7154 : papszMetadata =
6425 7154 : CSLSetNameValue(papszMetadata, pszMetaName, pszMetaTemp);
6426 7154 : CPLFree(pszMetaTemp);
6427 7154 : pszMetaTemp = nullptr;
6428 : }
6429 : else
6430 : {
6431 1 : CPLDebug("GDAL_netCDF", "invalid metadata %s", pszMetaName);
6432 : }
6433 : }
6434 :
6435 1779 : CPLFree(pszVarFullName);
6436 1779 : CPLFree(pszMetaName);
6437 :
6438 1779 : if (var == NC_GLOBAL)
6439 : {
6440 : // Recurse on sub-groups.
6441 518 : int nSubGroups = 0;
6442 518 : int *panSubGroupIds = nullptr;
6443 518 : NCDFGetSubGroups(cdfidIn, &nSubGroups, &panSubGroupIds);
6444 547 : for (int i = 0; i < nSubGroups; i++)
6445 : {
6446 29 : ReadAttributes(panSubGroupIds[i], var);
6447 : }
6448 518 : CPLFree(panSubGroupIds);
6449 : }
6450 :
6451 1779 : return CE_None;
6452 : }
6453 :
6454 : /************************************************************************/
6455 : /* netCDFDataset::CreateSubDatasetList() */
6456 : /************************************************************************/
6457 51 : void netCDFDataset::CreateSubDatasetList(int nGroupId)
6458 : {
6459 : char szVarStdName[NC_MAX_NAME + 1];
6460 51 : int *ponDimIds = nullptr;
6461 : nc_type nAttype;
6462 : size_t nAttlen;
6463 :
6464 51 : netCDFDataset *poDS = this;
6465 :
6466 : int nVarCount;
6467 51 : nc_inq_nvars(nGroupId, &nVarCount);
6468 :
6469 51 : const bool bListAllArrays = CPLTestBool(
6470 51 : CSLFetchNameValueDef(papszOpenOptions, "LIST_ALL_ARRAYS", "NO"));
6471 :
6472 329 : for (int nVar = 0; nVar < nVarCount; nVar++)
6473 : {
6474 :
6475 : int nDims;
6476 278 : nc_inq_varndims(nGroupId, nVar, &nDims);
6477 :
6478 278 : if ((bListAllArrays && nDims > 0) || nDims >= 2)
6479 : {
6480 158 : ponDimIds = static_cast<int *>(CPLCalloc(nDims, sizeof(int)));
6481 158 : nc_inq_vardimid(nGroupId, nVar, ponDimIds);
6482 :
6483 : // Create Sub dataset list.
6484 158 : CPLString osDim;
6485 487 : for (int i = 0; i < nDims; i++)
6486 : {
6487 : size_t nDimLen;
6488 329 : nc_inq_dimlen(nGroupId, ponDimIds[i], &nDimLen);
6489 329 : if (!osDim.empty())
6490 171 : osDim += 'x';
6491 329 : osDim += CPLSPrintf("%d", (int)nDimLen);
6492 : }
6493 158 : CPLFree(ponDimIds);
6494 :
6495 : nc_type nVarType;
6496 158 : nc_inq_vartype(nGroupId, nVar, &nVarType);
6497 158 : const char *pszType = "";
6498 158 : switch (nVarType)
6499 : {
6500 38 : case NC_BYTE:
6501 38 : pszType = "8-bit integer";
6502 38 : break;
6503 2 : case NC_CHAR:
6504 2 : pszType = "8-bit character";
6505 2 : break;
6506 6 : case NC_SHORT:
6507 6 : pszType = "16-bit integer";
6508 6 : break;
6509 10 : case NC_INT:
6510 10 : pszType = "32-bit integer";
6511 10 : break;
6512 51 : case NC_FLOAT:
6513 51 : pszType = "32-bit floating-point";
6514 51 : break;
6515 33 : case NC_DOUBLE:
6516 33 : pszType = "64-bit floating-point";
6517 33 : break;
6518 4 : case NC_UBYTE:
6519 4 : pszType = "8-bit unsigned integer";
6520 4 : break;
6521 1 : case NC_USHORT:
6522 1 : pszType = "16-bit unsigned integer";
6523 1 : break;
6524 1 : case NC_UINT:
6525 1 : pszType = "32-bit unsigned integer";
6526 1 : break;
6527 1 : case NC_INT64:
6528 1 : pszType = "64-bit integer";
6529 1 : break;
6530 1 : case NC_UINT64:
6531 1 : pszType = "64-bit unsigned integer";
6532 1 : break;
6533 10 : default:
6534 10 : break;
6535 : }
6536 :
6537 158 : char *pszName = nullptr;
6538 158 : if (NCDFGetVarFullName(nGroupId, nVar, &pszName) != CE_None)
6539 0 : continue;
6540 :
6541 158 : nSubDatasets++;
6542 :
6543 158 : nAttlen = 0;
6544 158 : nc_inq_att(nGroupId, nVar, CF_STD_NAME, &nAttype, &nAttlen);
6545 316 : if (nAttlen < sizeof(szVarStdName) &&
6546 158 : nc_get_att_text(nGroupId, nVar, CF_STD_NAME, szVarStdName) ==
6547 : NC_NOERR)
6548 : {
6549 53 : szVarStdName[nAttlen] = '\0';
6550 : }
6551 : else
6552 : {
6553 105 : snprintf(szVarStdName, sizeof(szVarStdName), "%s", pszName);
6554 : }
6555 :
6556 : char szTemp[NC_MAX_NAME + 1];
6557 158 : snprintf(szTemp, sizeof(szTemp), "SUBDATASET_%d_NAME",
6558 : nSubDatasets);
6559 :
6560 158 : if (strchr(pszName, ' ') || strchr(pszName, ':'))
6561 : {
6562 1 : poDS->papszSubDatasets = CSLSetNameValue(
6563 : poDS->papszSubDatasets, szTemp,
6564 : CPLSPrintf("NETCDF:\"%s\":\"%s\"", poDS->osFilename.c_str(),
6565 : pszName));
6566 : }
6567 : else
6568 : {
6569 157 : poDS->papszSubDatasets = CSLSetNameValue(
6570 : poDS->papszSubDatasets, szTemp,
6571 : CPLSPrintf("NETCDF:\"%s\":%s", poDS->osFilename.c_str(),
6572 : pszName));
6573 : }
6574 :
6575 158 : CPLFree(pszName);
6576 :
6577 158 : snprintf(szTemp, sizeof(szTemp), "SUBDATASET_%d_DESC",
6578 : nSubDatasets);
6579 :
6580 158 : poDS->papszSubDatasets =
6581 158 : CSLSetNameValue(poDS->papszSubDatasets, szTemp,
6582 : CPLSPrintf("[%s] %s (%s)", osDim.c_str(),
6583 : szVarStdName, pszType));
6584 : }
6585 : }
6586 :
6587 : // Recurse on sub groups.
6588 51 : int nSubGroups = 0;
6589 51 : int *panSubGroupIds = nullptr;
6590 51 : NCDFGetSubGroups(nGroupId, &nSubGroups, &panSubGroupIds);
6591 56 : for (int i = 0; i < nSubGroups; i++)
6592 : {
6593 5 : CreateSubDatasetList(panSubGroupIds[i]);
6594 : }
6595 51 : CPLFree(panSubGroupIds);
6596 51 : }
6597 :
6598 : /************************************************************************/
6599 : /* TestCapability() */
6600 : /************************************************************************/
6601 :
6602 248 : int netCDFDataset::TestCapability(const char *pszCap)
6603 : {
6604 248 : if (EQUAL(pszCap, ODsCCreateLayer))
6605 : {
6606 223 : return eAccess == GA_Update && nBands == 0 &&
6607 218 : (eMultipleLayerBehavior != SINGLE_LAYER ||
6608 229 : this->GetLayerCount() == 0 || bSGSupport);
6609 : }
6610 136 : else if (EQUAL(pszCap, ODsCZGeometries))
6611 2 : return true;
6612 :
6613 134 : return false;
6614 : }
6615 :
6616 : /************************************************************************/
6617 : /* GetLayer() */
6618 : /************************************************************************/
6619 :
6620 384 : OGRLayer *netCDFDataset::GetLayer(int nIdx)
6621 : {
6622 384 : if (nIdx < 0 || nIdx >= this->GetLayerCount())
6623 2 : return nullptr;
6624 382 : return papoLayers[nIdx].get();
6625 : }
6626 :
6627 : /************************************************************************/
6628 : /* ICreateLayer() */
6629 : /************************************************************************/
6630 :
6631 59 : OGRLayer *netCDFDataset::ICreateLayer(const char *pszName,
6632 : const OGRGeomFieldDefn *poGeomFieldDefn,
6633 : CSLConstList papszOptions)
6634 : {
6635 59 : int nLayerCDFId = cdfid;
6636 59 : if (!TestCapability(ODsCCreateLayer))
6637 0 : return nullptr;
6638 :
6639 59 : const auto eGType = poGeomFieldDefn ? poGeomFieldDefn->GetType() : wkbNone;
6640 : const auto poSpatialRef =
6641 59 : poGeomFieldDefn ? poGeomFieldDefn->GetSpatialRef() : nullptr;
6642 :
6643 118 : CPLString osNetCDFLayerName(pszName);
6644 59 : const netCDFWriterConfigLayer *poLayerConfig = nullptr;
6645 59 : if (oWriterConfig.m_bIsValid)
6646 : {
6647 : std::map<CPLString, netCDFWriterConfigLayer>::const_iterator
6648 2 : oLayerIter = oWriterConfig.m_oLayers.find(pszName);
6649 2 : if (oLayerIter != oWriterConfig.m_oLayers.end())
6650 : {
6651 1 : poLayerConfig = &(oLayerIter->second);
6652 1 : osNetCDFLayerName = poLayerConfig->m_osNetCDFName;
6653 : }
6654 : }
6655 :
6656 59 : netCDFDataset *poLayerDataset = nullptr;
6657 59 : if (eMultipleLayerBehavior == SEPARATE_FILES)
6658 : {
6659 2 : char **papszDatasetOptions = nullptr;
6660 2 : papszDatasetOptions = CSLSetNameValue(
6661 : papszDatasetOptions, "CONFIG_FILE",
6662 2 : CSLFetchNameValue(papszCreationOptions, "CONFIG_FILE"));
6663 : papszDatasetOptions =
6664 2 : CSLSetNameValue(papszDatasetOptions, "FORMAT",
6665 2 : CSLFetchNameValue(papszCreationOptions, "FORMAT"));
6666 2 : papszDatasetOptions = CSLSetNameValue(
6667 : papszDatasetOptions, "WRITE_GDAL_TAGS",
6668 2 : CSLFetchNameValue(papszCreationOptions, "WRITE_GDAL_TAGS"));
6669 : const CPLString osLayerFilename(
6670 2 : CPLFormFilenameSafe(osFilename, osNetCDFLayerName, "nc"));
6671 2 : CPLAcquireMutex(hNCMutex, 1000.0);
6672 2 : poLayerDataset =
6673 2 : CreateLL(osLayerFilename, 0, 0, 0, papszDatasetOptions);
6674 2 : CPLReleaseMutex(hNCMutex);
6675 2 : CSLDestroy(papszDatasetOptions);
6676 2 : if (poLayerDataset == nullptr)
6677 0 : return nullptr;
6678 :
6679 2 : nLayerCDFId = poLayerDataset->cdfid;
6680 2 : NCDFAddGDALHistory(nLayerCDFId, osLayerFilename, bWriteGDALVersion,
6681 2 : bWriteGDALHistory, "", "Create",
6682 : NCDF_CONVENTIONS_CF_V1_6);
6683 : }
6684 57 : else if (eMultipleLayerBehavior == SEPARATE_GROUPS)
6685 : {
6686 2 : SetDefineMode(true);
6687 :
6688 2 : nLayerCDFId = -1;
6689 2 : int status = nc_def_grp(cdfid, osNetCDFLayerName, &nLayerCDFId);
6690 2 : NCDF_ERR(status);
6691 2 : if (status != NC_NOERR)
6692 0 : return nullptr;
6693 :
6694 2 : NCDFAddGDALHistory(nLayerCDFId, osFilename, bWriteGDALVersion,
6695 2 : bWriteGDALHistory, "", "Create",
6696 : NCDF_CONVENTIONS_CF_V1_6);
6697 : }
6698 :
6699 : // Make a clone to workaround a bug in released MapServer versions
6700 : // that destroys the passed SRS instead of releasing it .
6701 59 : OGRSpatialReference *poSRS = nullptr;
6702 59 : if (poSpatialRef)
6703 : {
6704 43 : poSRS = poSpatialRef->Clone();
6705 43 : poSRS->SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
6706 : }
6707 : std::shared_ptr<netCDFLayer> poLayer(
6708 59 : new netCDFLayer(poLayerDataset ? poLayerDataset : this, nLayerCDFId,
6709 118 : osNetCDFLayerName, eGType, poSRS));
6710 59 : if (poSRS != nullptr)
6711 43 : poSRS->Release();
6712 :
6713 : // Fetch layer creation options coming from config file
6714 59 : char **papszNewOptions = CSLDuplicate(papszOptions);
6715 59 : if (oWriterConfig.m_bIsValid)
6716 : {
6717 2 : std::map<CPLString, CPLString>::const_iterator oIter;
6718 3 : for (oIter = oWriterConfig.m_oLayerCreationOptions.begin();
6719 3 : oIter != oWriterConfig.m_oLayerCreationOptions.end(); ++oIter)
6720 : {
6721 : papszNewOptions =
6722 1 : CSLSetNameValue(papszNewOptions, oIter->first, oIter->second);
6723 : }
6724 2 : if (poLayerConfig != nullptr)
6725 : {
6726 3 : for (oIter = poLayerConfig->m_oLayerCreationOptions.begin();
6727 3 : oIter != poLayerConfig->m_oLayerCreationOptions.end(); ++oIter)
6728 : {
6729 2 : papszNewOptions = CSLSetNameValue(papszNewOptions, oIter->first,
6730 2 : oIter->second);
6731 : }
6732 : }
6733 : }
6734 :
6735 59 : const bool bRet = poLayer->Create(papszNewOptions, poLayerConfig);
6736 59 : CSLDestroy(papszNewOptions);
6737 :
6738 59 : if (!bRet)
6739 : {
6740 0 : return nullptr;
6741 : }
6742 :
6743 59 : if (poLayerDataset != nullptr)
6744 2 : apoVectorDatasets.push_back(poLayerDataset);
6745 :
6746 59 : papoLayers.push_back(poLayer);
6747 59 : return poLayer.get();
6748 : }
6749 :
6750 : /************************************************************************/
6751 : /* CloneAttributes() */
6752 : /************************************************************************/
6753 :
6754 137 : bool netCDFDataset::CloneAttributes(int old_cdfid, int new_cdfid, int nSrcVarId,
6755 : int nDstVarId)
6756 : {
6757 137 : int nAttCount = -1;
6758 137 : int status = nc_inq_varnatts(old_cdfid, nSrcVarId, &nAttCount);
6759 137 : NCDF_ERR(status);
6760 :
6761 693 : for (int i = 0; i < nAttCount; i++)
6762 : {
6763 : char szName[NC_MAX_NAME + 1];
6764 556 : szName[0] = 0;
6765 556 : status = nc_inq_attname(old_cdfid, nSrcVarId, i, szName);
6766 556 : NCDF_ERR(status);
6767 :
6768 : status =
6769 556 : nc_copy_att(old_cdfid, nSrcVarId, szName, new_cdfid, nDstVarId);
6770 556 : NCDF_ERR(status);
6771 556 : if (status != NC_NOERR)
6772 0 : return false;
6773 : }
6774 :
6775 137 : return true;
6776 : }
6777 :
6778 : /************************************************************************/
6779 : /* CloneVariableContent() */
6780 : /************************************************************************/
6781 :
6782 121 : bool netCDFDataset::CloneVariableContent(int old_cdfid, int new_cdfid,
6783 : int nSrcVarId, int nDstVarId)
6784 : {
6785 121 : int nVarDimCount = -1;
6786 121 : int status = nc_inq_varndims(old_cdfid, nSrcVarId, &nVarDimCount);
6787 121 : NCDF_ERR(status);
6788 121 : int anDimIds[] = {-1, 1};
6789 121 : status = nc_inq_vardimid(old_cdfid, nSrcVarId, anDimIds);
6790 121 : NCDF_ERR(status);
6791 121 : nc_type nc_datatype = NC_NAT;
6792 121 : status = nc_inq_vartype(old_cdfid, nSrcVarId, &nc_datatype);
6793 121 : NCDF_ERR(status);
6794 121 : size_t nTypeSize = 0;
6795 121 : switch (nc_datatype)
6796 : {
6797 35 : case NC_BYTE:
6798 : case NC_CHAR:
6799 35 : nTypeSize = 1;
6800 35 : break;
6801 4 : case NC_SHORT:
6802 4 : nTypeSize = 2;
6803 4 : break;
6804 24 : case NC_INT:
6805 24 : nTypeSize = 4;
6806 24 : break;
6807 4 : case NC_FLOAT:
6808 4 : nTypeSize = 4;
6809 4 : break;
6810 43 : case NC_DOUBLE:
6811 43 : nTypeSize = 8;
6812 43 : break;
6813 2 : case NC_UBYTE:
6814 2 : nTypeSize = 1;
6815 2 : break;
6816 2 : case NC_USHORT:
6817 2 : nTypeSize = 2;
6818 2 : break;
6819 2 : case NC_UINT:
6820 2 : nTypeSize = 4;
6821 2 : break;
6822 4 : case NC_INT64:
6823 : case NC_UINT64:
6824 4 : nTypeSize = 8;
6825 4 : break;
6826 1 : case NC_STRING:
6827 1 : nTypeSize = sizeof(char *);
6828 1 : break;
6829 0 : default:
6830 : {
6831 0 : CPLError(CE_Failure, CPLE_NotSupported, "Unsupported data type: %d",
6832 : nc_datatype);
6833 0 : return false;
6834 : }
6835 : }
6836 :
6837 121 : size_t nElems = 1;
6838 : size_t anStart[NC_MAX_DIMS];
6839 : size_t anCount[NC_MAX_DIMS];
6840 121 : size_t nRecords = 1;
6841 261 : for (int i = 0; i < nVarDimCount; i++)
6842 : {
6843 140 : anStart[i] = 0;
6844 140 : if (i == 0)
6845 : {
6846 116 : anCount[i] = 1;
6847 116 : status = nc_inq_dimlen(old_cdfid, anDimIds[i], &nRecords);
6848 116 : NCDF_ERR(status);
6849 : }
6850 : else
6851 : {
6852 24 : anCount[i] = 0;
6853 24 : status = nc_inq_dimlen(old_cdfid, anDimIds[i], &anCount[i]);
6854 24 : NCDF_ERR(status);
6855 24 : nElems *= anCount[i];
6856 : }
6857 : }
6858 :
6859 : /* Workaround in some cases a netCDF bug:
6860 : * https://github.com/Unidata/netcdf-c/pull/1442 */
6861 121 : if (nRecords > 0 && nRecords < 10 * 1000 * 1000 / (nElems * nTypeSize))
6862 : {
6863 119 : nElems *= nRecords;
6864 119 : anCount[0] = nRecords;
6865 119 : nRecords = 1;
6866 : }
6867 :
6868 121 : void *pBuffer = VSI_MALLOC2_VERBOSE(nElems, nTypeSize);
6869 121 : if (pBuffer == nullptr)
6870 0 : return false;
6871 :
6872 240 : for (size_t iRecord = 0; iRecord < nRecords; iRecord++)
6873 : {
6874 119 : anStart[0] = iRecord;
6875 :
6876 119 : switch (nc_datatype)
6877 : {
6878 5 : case NC_BYTE:
6879 : status =
6880 5 : nc_get_vara_schar(old_cdfid, nSrcVarId, anStart, anCount,
6881 : static_cast<signed char *>(pBuffer));
6882 5 : if (!status)
6883 5 : status = nc_put_vara_schar(
6884 : new_cdfid, nDstVarId, anStart, anCount,
6885 : static_cast<signed char *>(pBuffer));
6886 5 : break;
6887 28 : case NC_CHAR:
6888 : status =
6889 28 : nc_get_vara_text(old_cdfid, nSrcVarId, anStart, anCount,
6890 : static_cast<char *>(pBuffer));
6891 28 : if (!status)
6892 : status =
6893 28 : nc_put_vara_text(new_cdfid, nDstVarId, anStart, anCount,
6894 : static_cast<char *>(pBuffer));
6895 28 : break;
6896 4 : case NC_SHORT:
6897 : status =
6898 4 : nc_get_vara_short(old_cdfid, nSrcVarId, anStart, anCount,
6899 : static_cast<short *>(pBuffer));
6900 4 : if (!status)
6901 4 : status = nc_put_vara_short(new_cdfid, nDstVarId, anStart,
6902 : anCount,
6903 : static_cast<short *>(pBuffer));
6904 4 : break;
6905 24 : case NC_INT:
6906 24 : status = nc_get_vara_int(old_cdfid, nSrcVarId, anStart, anCount,
6907 : static_cast<int *>(pBuffer));
6908 24 : if (!status)
6909 : status =
6910 24 : nc_put_vara_int(new_cdfid, nDstVarId, anStart, anCount,
6911 : static_cast<int *>(pBuffer));
6912 24 : break;
6913 4 : case NC_FLOAT:
6914 : status =
6915 4 : nc_get_vara_float(old_cdfid, nSrcVarId, anStart, anCount,
6916 : static_cast<float *>(pBuffer));
6917 4 : if (!status)
6918 4 : status = nc_put_vara_float(new_cdfid, nDstVarId, anStart,
6919 : anCount,
6920 : static_cast<float *>(pBuffer));
6921 4 : break;
6922 43 : case NC_DOUBLE:
6923 : status =
6924 43 : nc_get_vara_double(old_cdfid, nSrcVarId, anStart, anCount,
6925 : static_cast<double *>(pBuffer));
6926 43 : if (!status)
6927 43 : status = nc_put_vara_double(new_cdfid, nDstVarId, anStart,
6928 : anCount,
6929 : static_cast<double *>(pBuffer));
6930 43 : break;
6931 1 : case NC_STRING:
6932 : status =
6933 1 : nc_get_vara_string(old_cdfid, nSrcVarId, anStart, anCount,
6934 : static_cast<char **>(pBuffer));
6935 1 : if (!status)
6936 : {
6937 1 : status = nc_put_vara_string(
6938 : new_cdfid, nDstVarId, anStart, anCount,
6939 : static_cast<const char **>(pBuffer));
6940 1 : nc_free_string(nElems, static_cast<char **>(pBuffer));
6941 : }
6942 1 : break;
6943 :
6944 2 : case NC_UBYTE:
6945 : status =
6946 2 : nc_get_vara_uchar(old_cdfid, nSrcVarId, anStart, anCount,
6947 : static_cast<unsigned char *>(pBuffer));
6948 2 : if (!status)
6949 2 : status = nc_put_vara_uchar(
6950 : new_cdfid, nDstVarId, anStart, anCount,
6951 : static_cast<unsigned char *>(pBuffer));
6952 2 : break;
6953 2 : case NC_USHORT:
6954 : status =
6955 2 : nc_get_vara_ushort(old_cdfid, nSrcVarId, anStart, anCount,
6956 : static_cast<unsigned short *>(pBuffer));
6957 2 : if (!status)
6958 2 : status = nc_put_vara_ushort(
6959 : new_cdfid, nDstVarId, anStart, anCount,
6960 : static_cast<unsigned short *>(pBuffer));
6961 2 : break;
6962 2 : case NC_UINT:
6963 : status =
6964 2 : nc_get_vara_uint(old_cdfid, nSrcVarId, anStart, anCount,
6965 : static_cast<unsigned int *>(pBuffer));
6966 2 : if (!status)
6967 : status =
6968 2 : nc_put_vara_uint(new_cdfid, nDstVarId, anStart, anCount,
6969 : static_cast<unsigned int *>(pBuffer));
6970 2 : break;
6971 2 : case NC_INT64:
6972 : status =
6973 2 : nc_get_vara_longlong(old_cdfid, nSrcVarId, anStart, anCount,
6974 : static_cast<long long *>(pBuffer));
6975 2 : if (!status)
6976 2 : status = nc_put_vara_longlong(
6977 : new_cdfid, nDstVarId, anStart, anCount,
6978 : static_cast<long long *>(pBuffer));
6979 2 : break;
6980 2 : case NC_UINT64:
6981 2 : status = nc_get_vara_ulonglong(
6982 : old_cdfid, nSrcVarId, anStart, anCount,
6983 : static_cast<unsigned long long *>(pBuffer));
6984 2 : if (!status)
6985 2 : status = nc_put_vara_ulonglong(
6986 : new_cdfid, nDstVarId, anStart, anCount,
6987 : static_cast<unsigned long long *>(pBuffer));
6988 2 : break;
6989 0 : default:
6990 0 : status = NC_EBADTYPE;
6991 : }
6992 :
6993 119 : NCDF_ERR(status);
6994 119 : if (status != NC_NOERR)
6995 : {
6996 0 : VSIFree(pBuffer);
6997 0 : return false;
6998 : }
6999 : }
7000 :
7001 121 : VSIFree(pBuffer);
7002 121 : return true;
7003 : }
7004 :
7005 : /************************************************************************/
7006 : /* NCDFIsUnlimitedDim() */
7007 : /************************************************************************/
7008 :
7009 58 : bool NCDFIsUnlimitedDim(bool bIsNC4, int cdfid, int nDimId)
7010 : {
7011 58 : if (bIsNC4)
7012 : {
7013 16 : int nUnlimitedDims = 0;
7014 16 : nc_inq_unlimdims(cdfid, &nUnlimitedDims, nullptr);
7015 16 : bool bFound = false;
7016 16 : if (nUnlimitedDims)
7017 : {
7018 : int *panUnlimitedDimIds =
7019 16 : static_cast<int *>(CPLMalloc(sizeof(int) * nUnlimitedDims));
7020 16 : nc_inq_unlimdims(cdfid, nullptr, panUnlimitedDimIds);
7021 30 : for (int i = 0; i < nUnlimitedDims; i++)
7022 : {
7023 22 : if (panUnlimitedDimIds[i] == nDimId)
7024 : {
7025 8 : bFound = true;
7026 8 : break;
7027 : }
7028 : }
7029 16 : CPLFree(panUnlimitedDimIds);
7030 : }
7031 16 : return bFound;
7032 : }
7033 : else
7034 : {
7035 42 : int nUnlimitedDimId = -1;
7036 42 : nc_inq(cdfid, nullptr, nullptr, nullptr, &nUnlimitedDimId);
7037 42 : return nDimId == nUnlimitedDimId;
7038 : }
7039 : }
7040 :
7041 : /************************************************************************/
7042 : /* CloneGrp() */
7043 : /************************************************************************/
7044 :
7045 16 : bool netCDFDataset::CloneGrp(int nOldGrpId, int nNewGrpId, bool bIsNC4,
7046 : int nLayerId, int nDimIdToGrow, size_t nNewSize)
7047 : {
7048 : // Clone dimensions
7049 16 : int nDimCount = -1;
7050 16 : int status = nc_inq_ndims(nOldGrpId, &nDimCount);
7051 16 : NCDF_ERR(status);
7052 16 : if (nDimCount < 0 || nDimCount > NC_MAX_DIMS)
7053 0 : return false;
7054 : int anDimIds[NC_MAX_DIMS];
7055 16 : int nUnlimiDimID = -1;
7056 16 : status = nc_inq_unlimdim(nOldGrpId, &nUnlimiDimID);
7057 16 : NCDF_ERR(status);
7058 16 : if (bIsNC4)
7059 : {
7060 : // In NC4, the dimension ids of a group are not necessarily in
7061 : // [0,nDimCount-1] range
7062 8 : int nDimCount2 = -1;
7063 8 : status = nc_inq_dimids(nOldGrpId, &nDimCount2, anDimIds, FALSE);
7064 8 : NCDF_ERR(status);
7065 8 : CPLAssert(nDimCount == nDimCount2);
7066 : }
7067 : else
7068 : {
7069 36 : for (int i = 0; i < nDimCount; i++)
7070 28 : anDimIds[i] = i;
7071 : }
7072 60 : for (int i = 0; i < nDimCount; i++)
7073 : {
7074 : char szDimName[NC_MAX_NAME + 1];
7075 44 : szDimName[0] = 0;
7076 44 : size_t nLen = 0;
7077 44 : const int nDimId = anDimIds[i];
7078 44 : status = nc_inq_dim(nOldGrpId, nDimId, szDimName, &nLen);
7079 44 : NCDF_ERR(status);
7080 44 : if (NCDFIsUnlimitedDim(bIsNC4, nOldGrpId, nDimId))
7081 16 : nLen = NC_UNLIMITED;
7082 28 : else if (nDimId == nDimIdToGrow && nOldGrpId == nLayerId)
7083 13 : nLen = nNewSize;
7084 44 : int nNewDimId = -1;
7085 44 : status = nc_def_dim(nNewGrpId, szDimName, nLen, &nNewDimId);
7086 44 : NCDF_ERR(status);
7087 44 : CPLAssert(nDimId == nNewDimId);
7088 44 : if (status != NC_NOERR)
7089 : {
7090 0 : return false;
7091 : }
7092 : }
7093 :
7094 : // Clone main attributes
7095 16 : if (!CloneAttributes(nOldGrpId, nNewGrpId, NC_GLOBAL, NC_GLOBAL))
7096 : {
7097 0 : return false;
7098 : }
7099 :
7100 : // Clone variable definitions
7101 16 : int nVarCount = -1;
7102 16 : status = nc_inq_nvars(nOldGrpId, &nVarCount);
7103 16 : NCDF_ERR(status);
7104 :
7105 137 : for (int i = 0; i < nVarCount; i++)
7106 : {
7107 : char szVarName[NC_MAX_NAME + 1];
7108 121 : szVarName[0] = 0;
7109 121 : status = nc_inq_varname(nOldGrpId, i, szVarName);
7110 121 : NCDF_ERR(status);
7111 121 : nc_type nc_datatype = NC_NAT;
7112 121 : status = nc_inq_vartype(nOldGrpId, i, &nc_datatype);
7113 121 : NCDF_ERR(status);
7114 121 : int nVarDimCount = -1;
7115 121 : status = nc_inq_varndims(nOldGrpId, i, &nVarDimCount);
7116 121 : NCDF_ERR(status);
7117 121 : status = nc_inq_vardimid(nOldGrpId, i, anDimIds);
7118 121 : NCDF_ERR(status);
7119 121 : int nNewVarId = -1;
7120 121 : status = nc_def_var(nNewGrpId, szVarName, nc_datatype, nVarDimCount,
7121 : anDimIds, &nNewVarId);
7122 121 : NCDF_ERR(status);
7123 121 : CPLAssert(i == nNewVarId);
7124 121 : if (status != NC_NOERR)
7125 : {
7126 0 : return false;
7127 : }
7128 :
7129 121 : if (!CloneAttributes(nOldGrpId, nNewGrpId, i, i))
7130 : {
7131 0 : return false;
7132 : }
7133 : }
7134 :
7135 16 : status = nc_enddef(nNewGrpId);
7136 16 : NCDF_ERR(status);
7137 16 : if (status != NC_NOERR)
7138 : {
7139 0 : return false;
7140 : }
7141 :
7142 : // Clone variable content
7143 137 : for (int i = 0; i < nVarCount; i++)
7144 : {
7145 121 : if (!CloneVariableContent(nOldGrpId, nNewGrpId, i, i))
7146 : {
7147 0 : return false;
7148 : }
7149 : }
7150 :
7151 16 : return true;
7152 : }
7153 :
7154 : /************************************************************************/
7155 : /* GrowDim() */
7156 : /************************************************************************/
7157 :
7158 13 : bool netCDFDataset::GrowDim(int nLayerId, int nDimIdToGrow, size_t nNewSize)
7159 : {
7160 : int nCreationMode;
7161 : // Set nCreationMode based on eFormat.
7162 13 : switch (eFormat)
7163 : {
7164 : #ifdef NETCDF_HAS_NC2
7165 0 : case NCDF_FORMAT_NC2:
7166 0 : nCreationMode = NC_CLOBBER | NC_64BIT_OFFSET;
7167 0 : break;
7168 : #endif
7169 5 : case NCDF_FORMAT_NC4:
7170 5 : nCreationMode = NC_CLOBBER | NC_NETCDF4;
7171 5 : break;
7172 0 : case NCDF_FORMAT_NC4C:
7173 0 : nCreationMode = NC_CLOBBER | NC_NETCDF4 | NC_CLASSIC_MODEL;
7174 0 : break;
7175 8 : case NCDF_FORMAT_NC:
7176 : default:
7177 8 : nCreationMode = NC_CLOBBER;
7178 8 : break;
7179 : }
7180 :
7181 13 : int new_cdfid = -1;
7182 26 : CPLString osTmpFilename(osFilename + ".tmp");
7183 26 : CPLString osFilenameForNCCreate(osTmpFilename);
7184 : #if defined(_WIN32) && !defined(NETCDF_USES_UTF8)
7185 : if (CPLTestBool(CPLGetConfigOption("GDAL_FILENAME_IS_UTF8", "YES")))
7186 : {
7187 : char *pszTemp =
7188 : CPLRecode(osFilenameForNCCreate, CPL_ENC_UTF8, "CP_ACP");
7189 : osFilenameForNCCreate = pszTemp;
7190 : CPLFree(pszTemp);
7191 : }
7192 : #endif
7193 13 : int status = nc_create(osFilenameForNCCreate, nCreationMode, &new_cdfid);
7194 13 : NCDF_ERR(status);
7195 13 : if (status != NC_NOERR)
7196 0 : return false;
7197 :
7198 13 : if (!CloneGrp(cdfid, new_cdfid, eFormat == NCDF_FORMAT_NC4, nLayerId,
7199 : nDimIdToGrow, nNewSize))
7200 : {
7201 0 : GDAL_nc_close(new_cdfid);
7202 0 : return false;
7203 : }
7204 :
7205 13 : int nGroupCount = 0;
7206 26 : std::vector<CPLString> oListGrpName;
7207 31 : if (eFormat == NCDF_FORMAT_NC4 &&
7208 18 : nc_inq_grps(cdfid, &nGroupCount, nullptr) == NC_NOERR &&
7209 5 : nGroupCount > 0)
7210 : {
7211 : int *panGroupIds =
7212 2 : static_cast<int *>(CPLMalloc(sizeof(int) * nGroupCount));
7213 2 : status = nc_inq_grps(cdfid, nullptr, panGroupIds);
7214 2 : NCDF_ERR(status);
7215 5 : for (int i = 0; i < nGroupCount; i++)
7216 : {
7217 : char szGroupName[NC_MAX_NAME + 1];
7218 3 : szGroupName[0] = 0;
7219 3 : NCDF_ERR(nc_inq_grpname(panGroupIds[i], szGroupName));
7220 3 : int nNewGrpId = -1;
7221 3 : status = nc_def_grp(new_cdfid, szGroupName, &nNewGrpId);
7222 3 : NCDF_ERR(status);
7223 3 : if (status != NC_NOERR)
7224 : {
7225 0 : CPLFree(panGroupIds);
7226 0 : GDAL_nc_close(new_cdfid);
7227 0 : return false;
7228 : }
7229 3 : if (!CloneGrp(panGroupIds[i], nNewGrpId, /*bIsNC4=*/true, nLayerId,
7230 : nDimIdToGrow, nNewSize))
7231 : {
7232 0 : CPLFree(panGroupIds);
7233 0 : GDAL_nc_close(new_cdfid);
7234 0 : return false;
7235 : }
7236 : }
7237 2 : CPLFree(panGroupIds);
7238 :
7239 5 : for (int i = 0; i < this->GetLayerCount(); i++)
7240 : {
7241 3 : auto poLayer = dynamic_cast<netCDFLayer *>(papoLayers[i].get());
7242 3 : if (poLayer)
7243 : {
7244 : char szGroupName[NC_MAX_NAME + 1];
7245 3 : szGroupName[0] = 0;
7246 3 : status = nc_inq_grpname(poLayer->GetCDFID(), szGroupName);
7247 3 : NCDF_ERR(status);
7248 3 : oListGrpName.push_back(szGroupName);
7249 : }
7250 : }
7251 : }
7252 :
7253 13 : GDAL_nc_close(cdfid);
7254 13 : cdfid = -1;
7255 13 : GDAL_nc_close(new_cdfid);
7256 :
7257 26 : CPLString osOriFilename(osFilename + ".ori");
7258 26 : if (VSIRename(osFilename, osOriFilename) != 0 ||
7259 13 : VSIRename(osTmpFilename, osFilename) != 0)
7260 : {
7261 0 : CPLError(CE_Failure, CPLE_FileIO, "Renaming of files failed");
7262 0 : return false;
7263 : }
7264 13 : VSIUnlink(osOriFilename);
7265 :
7266 26 : CPLString osFilenameForNCOpen(osFilename);
7267 : #if defined(_WIN32) && !defined(NETCDF_USES_UTF8)
7268 : if (CPLTestBool(CPLGetConfigOption("GDAL_FILENAME_IS_UTF8", "YES")))
7269 : {
7270 : char *pszTemp = CPLRecode(osFilenameForNCOpen, CPL_ENC_UTF8, "CP_ACP");
7271 : osFilenameForNCOpen = pszTemp;
7272 : CPLFree(pszTemp);
7273 : }
7274 : #endif
7275 13 : status = GDAL_nc_open(osFilenameForNCOpen, NC_WRITE, &cdfid);
7276 13 : NCDF_ERR(status);
7277 13 : if (status != NC_NOERR)
7278 0 : return false;
7279 13 : bDefineMode = false;
7280 :
7281 13 : if (!oListGrpName.empty())
7282 : {
7283 5 : for (int i = 0; i < this->GetLayerCount(); i++)
7284 : {
7285 3 : auto poLayer = dynamic_cast<netCDFLayer *>(papoLayers[i].get());
7286 3 : if (poLayer)
7287 : {
7288 3 : int nNewLayerCDFID = -1;
7289 3 : status = nc_inq_ncid(cdfid, oListGrpName[i].c_str(),
7290 : &nNewLayerCDFID);
7291 3 : NCDF_ERR(status);
7292 3 : poLayer->SetCDFID(nNewLayerCDFID);
7293 : }
7294 : }
7295 : }
7296 : else
7297 : {
7298 22 : for (int i = 0; i < this->GetLayerCount(); i++)
7299 : {
7300 11 : auto poLayer = dynamic_cast<netCDFLayer *>(papoLayers[i].get());
7301 11 : if (poLayer)
7302 11 : poLayer->SetCDFID(cdfid);
7303 : }
7304 : }
7305 :
7306 13 : return true;
7307 : }
7308 :
7309 : #ifdef ENABLE_NCDUMP
7310 :
7311 : /************************************************************************/
7312 : /* netCDFDatasetCreateTempFile() */
7313 : /************************************************************************/
7314 :
7315 : /* Create a netCDF file from a text dump (format of ncdump) */
7316 : /* Mostly to easy fuzzing of the driver, while still generating valid */
7317 : /* netCDF files. */
7318 : /* Note: not all data types are supported ! */
7319 4 : bool netCDFDatasetCreateTempFile(NetCDFFormatEnum eFormat,
7320 : const char *pszTmpFilename, VSILFILE *fpSrc)
7321 : {
7322 4 : CPL_IGNORE_RET_VAL(eFormat);
7323 4 : int nCreateMode = NC_CLOBBER;
7324 4 : if (eFormat == NCDF_FORMAT_NC4)
7325 1 : nCreateMode |= NC_NETCDF4;
7326 3 : else if (eFormat == NCDF_FORMAT_NC4C)
7327 0 : nCreateMode |= NC_NETCDF4 | NC_CLASSIC_MODEL;
7328 4 : int nCdfId = -1;
7329 4 : int status = nc_create(pszTmpFilename, nCreateMode, &nCdfId);
7330 4 : if (status != NC_NOERR)
7331 : {
7332 0 : return false;
7333 : }
7334 4 : VSIFSeekL(fpSrc, 0, SEEK_SET);
7335 : const char *pszLine;
7336 4 : constexpr int SECTION_NONE = 0;
7337 4 : constexpr int SECTION_DIMENSIONS = 1;
7338 4 : constexpr int SECTION_VARIABLES = 2;
7339 4 : constexpr int SECTION_DATA = 3;
7340 4 : int nActiveSection = SECTION_NONE;
7341 8 : std::map<CPLString, int> oMapDimToId;
7342 8 : std::map<int, int> oMapDimIdToDimLen;
7343 8 : std::map<CPLString, int> oMapVarToId;
7344 8 : std::map<int, std::vector<int>> oMapVarIdToVectorOfDimId;
7345 8 : std::map<int, int> oMapVarIdToType;
7346 4 : std::set<CPLString> oSetAttrDefined;
7347 4 : oMapVarToId[""] = -1;
7348 4 : size_t nTotalVarSize = 0;
7349 208 : while ((pszLine = CPLReadLineL(fpSrc)) != nullptr)
7350 : {
7351 204 : if (STARTS_WITH(pszLine, "dimensions:") &&
7352 : nActiveSection == SECTION_NONE)
7353 : {
7354 4 : nActiveSection = SECTION_DIMENSIONS;
7355 : }
7356 200 : else if (STARTS_WITH(pszLine, "variables:") &&
7357 : nActiveSection == SECTION_DIMENSIONS)
7358 : {
7359 4 : nActiveSection = SECTION_VARIABLES;
7360 : }
7361 196 : else if (STARTS_WITH(pszLine, "data:") &&
7362 : nActiveSection == SECTION_VARIABLES)
7363 : {
7364 4 : nActiveSection = SECTION_DATA;
7365 4 : status = nc_enddef(nCdfId);
7366 4 : if (status != NC_NOERR)
7367 : {
7368 0 : CPLDebug("netCDF", "nc_enddef() failed: %s",
7369 : nc_strerror(status));
7370 : }
7371 : }
7372 192 : else if (nActiveSection == SECTION_DIMENSIONS)
7373 : {
7374 9 : char **papszTokens = CSLTokenizeString2(pszLine, " \t=;", 0);
7375 9 : if (CSLCount(papszTokens) == 2)
7376 : {
7377 9 : const char *pszDimName = papszTokens[0];
7378 9 : bool bValidName = true;
7379 9 : if (STARTS_WITH(pszDimName, "_nc4_non_coord_"))
7380 : {
7381 : // This is an internal netcdf prefix. Using it may
7382 : // cause memory leaks.
7383 0 : bValidName = false;
7384 : }
7385 9 : if (!bValidName)
7386 : {
7387 0 : CPLDebug("netCDF",
7388 : "nc_def_dim(%s) failed: invalid name found",
7389 : pszDimName);
7390 0 : CSLDestroy(papszTokens);
7391 0 : continue;
7392 : }
7393 :
7394 : const bool bIsASCII =
7395 9 : CPLIsASCII(pszDimName, static_cast<size_t>(-1));
7396 9 : if (!bIsASCII)
7397 : {
7398 : // Workaround https://github.com/Unidata/netcdf-c/pull/450
7399 0 : CPLDebug("netCDF",
7400 : "nc_def_dim(%s) failed: rejected because "
7401 : "of non-ASCII characters",
7402 : pszDimName);
7403 0 : CSLDestroy(papszTokens);
7404 0 : continue;
7405 : }
7406 9 : int nDimSize = EQUAL(papszTokens[1], "UNLIMITED")
7407 : ? NC_UNLIMITED
7408 9 : : atoi(papszTokens[1]);
7409 9 : if (nDimSize >= 1000)
7410 1 : nDimSize = 1000; // to avoid very long processing
7411 9 : if (nDimSize >= 0)
7412 : {
7413 9 : int nDimId = -1;
7414 9 : status = nc_def_dim(nCdfId, pszDimName, nDimSize, &nDimId);
7415 9 : if (status != NC_NOERR)
7416 : {
7417 0 : CPLDebug("netCDF", "nc_def_dim(%s, %d) failed: %s",
7418 : pszDimName, nDimSize, nc_strerror(status));
7419 : }
7420 : else
7421 : {
7422 : #ifdef DEBUG_VERBOSE
7423 : CPLDebug("netCDF", "nc_def_dim(%s, %d) (%s) succeeded",
7424 : pszDimName, nDimSize, pszLine);
7425 : #endif
7426 9 : oMapDimToId[pszDimName] = nDimId;
7427 9 : oMapDimIdToDimLen[nDimId] = nDimSize;
7428 : }
7429 : }
7430 : }
7431 9 : CSLDestroy(papszTokens);
7432 : }
7433 183 : else if (nActiveSection == SECTION_VARIABLES)
7434 : {
7435 390 : while (*pszLine == ' ' || *pszLine == '\t')
7436 249 : pszLine++;
7437 141 : const char *pszColumn = strchr(pszLine, ':');
7438 141 : const char *pszEqual = strchr(pszLine, '=');
7439 141 : if (pszColumn == nullptr)
7440 : {
7441 21 : char **papszTokens = CSLTokenizeString2(pszLine, " \t=(),;", 0);
7442 21 : if (CSLCount(papszTokens) >= 2)
7443 : {
7444 17 : const char *pszVarName = papszTokens[1];
7445 17 : bool bValidName = true;
7446 17 : if (STARTS_WITH(pszVarName, "_nc4_non_coord_"))
7447 : {
7448 : // This is an internal netcdf prefix. Using it may
7449 : // cause memory leaks.
7450 0 : bValidName = false;
7451 : }
7452 138 : for (int i = 0; pszVarName[i]; i++)
7453 : {
7454 121 : if (!((pszVarName[i] >= 'a' && pszVarName[i] <= 'z') ||
7455 28 : (pszVarName[i] >= 'A' && pszVarName[i] <= 'Z') ||
7456 9 : (pszVarName[i] >= '0' && pszVarName[i] <= '9') ||
7457 6 : pszVarName[i] == '_'))
7458 : {
7459 0 : bValidName = false;
7460 : }
7461 : }
7462 17 : if (!bValidName)
7463 : {
7464 0 : CPLDebug(
7465 : "netCDF",
7466 : "nc_def_var(%s) failed: illegal character found",
7467 : pszVarName);
7468 0 : CSLDestroy(papszTokens);
7469 0 : continue;
7470 : }
7471 17 : if (oMapVarToId.find(pszVarName) != oMapVarToId.end())
7472 : {
7473 0 : CPLDebug("netCDF",
7474 : "nc_def_var(%s) failed: already defined",
7475 : pszVarName);
7476 0 : CSLDestroy(papszTokens);
7477 0 : continue;
7478 : }
7479 17 : const char *pszVarType = papszTokens[0];
7480 17 : int nc_datatype = NC_BYTE;
7481 17 : size_t nDataTypeSize = 1;
7482 17 : if (EQUAL(pszVarType, "char"))
7483 : {
7484 6 : nc_datatype = NC_CHAR;
7485 6 : nDataTypeSize = 1;
7486 : }
7487 11 : else if (EQUAL(pszVarType, "byte"))
7488 : {
7489 3 : nc_datatype = NC_BYTE;
7490 3 : nDataTypeSize = 1;
7491 : }
7492 8 : else if (EQUAL(pszVarType, "short"))
7493 : {
7494 0 : nc_datatype = NC_SHORT;
7495 0 : nDataTypeSize = 2;
7496 : }
7497 8 : else if (EQUAL(pszVarType, "int"))
7498 : {
7499 0 : nc_datatype = NC_INT;
7500 0 : nDataTypeSize = 4;
7501 : }
7502 8 : else if (EQUAL(pszVarType, "float"))
7503 : {
7504 0 : nc_datatype = NC_FLOAT;
7505 0 : nDataTypeSize = 4;
7506 : }
7507 8 : else if (EQUAL(pszVarType, "double"))
7508 : {
7509 8 : nc_datatype = NC_DOUBLE;
7510 8 : nDataTypeSize = 8;
7511 : }
7512 0 : else if (EQUAL(pszVarType, "ubyte"))
7513 : {
7514 0 : nc_datatype = NC_UBYTE;
7515 0 : nDataTypeSize = 1;
7516 : }
7517 0 : else if (EQUAL(pszVarType, "ushort"))
7518 : {
7519 0 : nc_datatype = NC_USHORT;
7520 0 : nDataTypeSize = 2;
7521 : }
7522 0 : else if (EQUAL(pszVarType, "uint"))
7523 : {
7524 0 : nc_datatype = NC_UINT;
7525 0 : nDataTypeSize = 4;
7526 : }
7527 0 : else if (EQUAL(pszVarType, "int64"))
7528 : {
7529 0 : nc_datatype = NC_INT64;
7530 0 : nDataTypeSize = 8;
7531 : }
7532 0 : else if (EQUAL(pszVarType, "uint64"))
7533 : {
7534 0 : nc_datatype = NC_UINT64;
7535 0 : nDataTypeSize = 8;
7536 : }
7537 :
7538 17 : int nDims = CSLCount(papszTokens) - 2;
7539 17 : if (nDims >= 32)
7540 : {
7541 : // The number of dimensions in a netCDFv4 file is
7542 : // limited by #define H5S_MAX_RANK 32
7543 : // but libnetcdf doesn't check that...
7544 0 : CPLDebug("netCDF",
7545 : "nc_def_var(%s) failed: too many dimensions",
7546 : pszVarName);
7547 0 : CSLDestroy(papszTokens);
7548 0 : continue;
7549 : }
7550 17 : std::vector<int> aoDimIds;
7551 17 : bool bFailed = false;
7552 17 : size_t nSize = 1;
7553 35 : for (int i = 0; i < nDims; i++)
7554 : {
7555 18 : const char *pszDimName = papszTokens[2 + i];
7556 18 : if (oMapDimToId.find(pszDimName) == oMapDimToId.end())
7557 : {
7558 0 : bFailed = true;
7559 0 : break;
7560 : }
7561 18 : const int nDimId = oMapDimToId[pszDimName];
7562 18 : aoDimIds.push_back(nDimId);
7563 :
7564 18 : const size_t nDimSize = oMapDimIdToDimLen[nDimId];
7565 18 : if (nDimSize != 0)
7566 : {
7567 18 : if (nSize >
7568 18 : std::numeric_limits<size_t>::max() / nDimSize)
7569 : {
7570 0 : bFailed = true;
7571 0 : break;
7572 : }
7573 : else
7574 : {
7575 18 : nSize *= nDimSize;
7576 : }
7577 : }
7578 : }
7579 17 : if (bFailed)
7580 : {
7581 0 : CPLDebug("netCDF",
7582 : "nc_def_var(%s) failed: unknown dimension(s)",
7583 : pszVarName);
7584 0 : CSLDestroy(papszTokens);
7585 0 : continue;
7586 : }
7587 17 : if (nSize > 100U * 1024 * 1024 / nDataTypeSize)
7588 : {
7589 0 : CPLDebug("netCDF",
7590 : "nc_def_var(%s) failed: too large data",
7591 : pszVarName);
7592 0 : CSLDestroy(papszTokens);
7593 0 : continue;
7594 : }
7595 17 : if (nTotalVarSize >
7596 34 : std::numeric_limits<size_t>::max() - nSize ||
7597 17 : nTotalVarSize + nSize > 100 * 1024 * 1024)
7598 : {
7599 0 : CPLDebug("netCDF",
7600 : "nc_def_var(%s) failed: too large data",
7601 : pszVarName);
7602 0 : CSLDestroy(papszTokens);
7603 0 : continue;
7604 : }
7605 17 : nTotalVarSize += nSize;
7606 :
7607 17 : int nVarId = -1;
7608 : status =
7609 30 : nc_def_var(nCdfId, pszVarName, nc_datatype, nDims,
7610 13 : (nDims) ? &aoDimIds[0] : nullptr, &nVarId);
7611 17 : if (status != NC_NOERR)
7612 : {
7613 0 : CPLDebug("netCDF", "nc_def_var(%s) failed: %s",
7614 : pszVarName, nc_strerror(status));
7615 : }
7616 : else
7617 : {
7618 : #ifdef DEBUG_VERBOSE
7619 : CPLDebug("netCDF", "nc_def_var(%s) (%s) succeeded",
7620 : pszVarName, pszLine);
7621 : #endif
7622 17 : oMapVarToId[pszVarName] = nVarId;
7623 17 : oMapVarIdToType[nVarId] = nc_datatype;
7624 17 : oMapVarIdToVectorOfDimId[nVarId] = std::move(aoDimIds);
7625 : }
7626 : }
7627 21 : CSLDestroy(papszTokens);
7628 : }
7629 120 : else if (pszEqual != nullptr && pszEqual - pszColumn > 0)
7630 : {
7631 116 : CPLString osVarName(pszLine, pszColumn - pszLine);
7632 116 : CPLString osAttrName(pszColumn + 1, pszEqual - pszColumn - 1);
7633 116 : osAttrName.Trim();
7634 116 : if (oMapVarToId.find(osVarName) == oMapVarToId.end())
7635 : {
7636 0 : CPLDebug("netCDF",
7637 : "nc_put_att(%s:%s) failed: "
7638 : "no corresponding variable",
7639 : osVarName.c_str(), osAttrName.c_str());
7640 0 : continue;
7641 : }
7642 116 : bool bValidName = true;
7643 1743 : for (size_t i = 0; i < osAttrName.size(); i++)
7644 : {
7645 1865 : if (!((osAttrName[i] >= 'a' && osAttrName[i] <= 'z') ||
7646 238 : (osAttrName[i] >= 'A' && osAttrName[i] <= 'Z') ||
7647 158 : (osAttrName[i] >= '0' && osAttrName[i] <= '9') ||
7648 158 : osAttrName[i] == '_'))
7649 : {
7650 0 : bValidName = false;
7651 : }
7652 : }
7653 116 : if (!bValidName)
7654 : {
7655 0 : CPLDebug(
7656 : "netCDF",
7657 : "nc_put_att(%s:%s) failed: illegal character found",
7658 : osVarName.c_str(), osAttrName.c_str());
7659 0 : continue;
7660 : }
7661 116 : if (oSetAttrDefined.find(osVarName + ":" + osAttrName) !=
7662 232 : oSetAttrDefined.end())
7663 : {
7664 0 : CPLDebug("netCDF",
7665 : "nc_put_att(%s:%s) failed: already defined",
7666 : osVarName.c_str(), osAttrName.c_str());
7667 0 : continue;
7668 : }
7669 :
7670 116 : const int nVarId = oMapVarToId[osVarName];
7671 116 : const char *pszValue = pszEqual + 1;
7672 232 : while (*pszValue == ' ')
7673 116 : pszValue++;
7674 :
7675 116 : status = NC_EBADTYPE;
7676 116 : if (*pszValue == '"')
7677 : {
7678 : // For _FillValue, the attribute type should match
7679 : // the variable type. Leaks memory with NC4 otherwise
7680 74 : if (osAttrName == "_FillValue")
7681 : {
7682 0 : CPLDebug("netCDF", "nc_put_att_(%s:%s) failed: %s",
7683 : osVarName.c_str(), osAttrName.c_str(),
7684 : nc_strerror(status));
7685 0 : continue;
7686 : }
7687 :
7688 : // Unquote and unescape string value
7689 74 : CPLString osVal(pszValue + 1);
7690 222 : while (!osVal.empty())
7691 : {
7692 222 : if (osVal.back() == ';' || osVal.back() == ' ')
7693 : {
7694 148 : osVal.pop_back();
7695 : }
7696 74 : else if (osVal.back() == '"')
7697 : {
7698 74 : osVal.pop_back();
7699 74 : break;
7700 : }
7701 : else
7702 : {
7703 0 : break;
7704 : }
7705 : }
7706 74 : osVal.replaceAll("\\\"", '"');
7707 74 : status = nc_put_att_text(nCdfId, nVarId, osAttrName,
7708 : osVal.size(), osVal.c_str());
7709 : }
7710 : else
7711 : {
7712 84 : CPLString osVal(pszValue);
7713 126 : while (!osVal.empty())
7714 : {
7715 126 : if (osVal.back() == ';' || osVal.back() == ' ')
7716 : {
7717 84 : osVal.pop_back();
7718 : }
7719 : else
7720 : {
7721 42 : break;
7722 : }
7723 : }
7724 42 : int nc_datatype = -1;
7725 42 : if (!osVal.empty() && osVal.back() == 'b')
7726 : {
7727 3 : nc_datatype = NC_BYTE;
7728 3 : osVal.pop_back();
7729 : }
7730 39 : else if (!osVal.empty() && osVal.back() == 's')
7731 : {
7732 3 : nc_datatype = NC_SHORT;
7733 3 : osVal.pop_back();
7734 : }
7735 42 : if (CPLGetValueType(osVal) == CPL_VALUE_INTEGER)
7736 : {
7737 7 : if (nc_datatype < 0)
7738 4 : nc_datatype = NC_INT;
7739 : }
7740 35 : else if (CPLGetValueType(osVal) == CPL_VALUE_REAL)
7741 : {
7742 32 : nc_datatype = NC_DOUBLE;
7743 : }
7744 : else
7745 : {
7746 3 : nc_datatype = -1;
7747 : }
7748 :
7749 : // For _FillValue, check that the attribute type matches
7750 : // the variable type. Leaks memory with NC4 otherwise
7751 42 : if (osAttrName == "_FillValue")
7752 : {
7753 6 : if (nVarId < 0 ||
7754 3 : nc_datatype != oMapVarIdToType[nVarId])
7755 : {
7756 0 : nc_datatype = -1;
7757 : }
7758 : }
7759 :
7760 42 : if (nc_datatype == NC_BYTE)
7761 : {
7762 : signed char chVal =
7763 3 : static_cast<signed char>(atoi(osVal));
7764 3 : status = nc_put_att_schar(nCdfId, nVarId, osAttrName,
7765 : NC_BYTE, 1, &chVal);
7766 : }
7767 39 : else if (nc_datatype == NC_SHORT)
7768 : {
7769 0 : short nVal = static_cast<short>(atoi(osVal));
7770 0 : status = nc_put_att_short(nCdfId, nVarId, osAttrName,
7771 : NC_SHORT, 1, &nVal);
7772 : }
7773 39 : else if (nc_datatype == NC_INT)
7774 : {
7775 4 : int nVal = static_cast<int>(atoi(osVal));
7776 4 : status = nc_put_att_int(nCdfId, nVarId, osAttrName,
7777 : NC_INT, 1, &nVal);
7778 : }
7779 35 : else if (nc_datatype == NC_DOUBLE)
7780 : {
7781 32 : double dfVal = CPLAtof(osVal);
7782 32 : status = nc_put_att_double(nCdfId, nVarId, osAttrName,
7783 : NC_DOUBLE, 1, &dfVal);
7784 : }
7785 : }
7786 116 : if (status != NC_NOERR)
7787 : {
7788 3 : CPLDebug("netCDF", "nc_put_att_(%s:%s) failed: %s",
7789 : osVarName.c_str(), osAttrName.c_str(),
7790 : nc_strerror(status));
7791 : }
7792 : else
7793 : {
7794 113 : oSetAttrDefined.insert(osVarName + ":" + osAttrName);
7795 : #ifdef DEBUG_VERBOSE
7796 : CPLDebug("netCDF", "nc_put_att_(%s:%s) (%s) succeeded",
7797 : osVarName.c_str(), osAttrName.c_str(), pszLine);
7798 : #endif
7799 : }
7800 : }
7801 : }
7802 42 : else if (nActiveSection == SECTION_DATA)
7803 : {
7804 55 : while (*pszLine == ' ' || *pszLine == '\t')
7805 17 : pszLine++;
7806 38 : const char *pszEqual = strchr(pszLine, '=');
7807 38 : if (pszEqual)
7808 : {
7809 17 : CPLString osVarName(pszLine, pszEqual - pszLine);
7810 17 : osVarName.Trim();
7811 17 : if (oMapVarToId.find(osVarName) == oMapVarToId.end())
7812 0 : continue;
7813 17 : const int nVarId = oMapVarToId[osVarName];
7814 17 : CPLString osAccVal(pszEqual + 1);
7815 17 : osAccVal.Trim();
7816 153 : while (osAccVal.empty() || osAccVal.back() != ';')
7817 : {
7818 136 : pszLine = CPLReadLineL(fpSrc);
7819 136 : if (pszLine == nullptr)
7820 0 : break;
7821 272 : CPLString osVal(pszLine);
7822 136 : osVal.Trim();
7823 136 : osAccVal += osVal;
7824 : }
7825 17 : if (pszLine == nullptr)
7826 0 : break;
7827 17 : osAccVal.pop_back();
7828 :
7829 : const std::vector<int> aoDimIds =
7830 34 : oMapVarIdToVectorOfDimId[nVarId];
7831 17 : size_t nSize = 1;
7832 34 : std::vector<size_t> aoStart, aoEdge;
7833 17 : aoStart.resize(aoDimIds.size());
7834 17 : aoEdge.resize(aoDimIds.size());
7835 35 : for (size_t i = 0; i < aoDimIds.size(); ++i)
7836 : {
7837 18 : const size_t nDimSize = oMapDimIdToDimLen[aoDimIds[i]];
7838 36 : if (nDimSize != 0 &&
7839 18 : nSize > std::numeric_limits<size_t>::max() / nDimSize)
7840 : {
7841 0 : nSize = 0;
7842 : }
7843 : else
7844 : {
7845 18 : nSize *= nDimSize;
7846 : }
7847 18 : aoStart[i] = 0;
7848 18 : aoEdge[i] = nDimSize;
7849 : }
7850 :
7851 17 : status = NC_EBADTYPE;
7852 17 : if (nSize == 0)
7853 : {
7854 : // Might happen with a unlimited dimension
7855 : }
7856 17 : else if (oMapVarIdToType[nVarId] == NC_DOUBLE)
7857 : {
7858 8 : if (!aoStart.empty())
7859 : {
7860 : char **papszTokens =
7861 8 : CSLTokenizeString2(osAccVal, " ,;", 0);
7862 8 : size_t nTokens = CSLCount(papszTokens);
7863 8 : if (nTokens >= nSize)
7864 : {
7865 : double *padfVals = static_cast<double *>(
7866 8 : VSI_CALLOC_VERBOSE(nSize, sizeof(double)));
7867 8 : if (padfVals)
7868 : {
7869 132 : for (size_t i = 0; i < nSize; i++)
7870 : {
7871 124 : padfVals[i] = CPLAtof(papszTokens[i]);
7872 : }
7873 8 : status = nc_put_vara_double(
7874 8 : nCdfId, nVarId, &aoStart[0], &aoEdge[0],
7875 : padfVals);
7876 8 : VSIFree(padfVals);
7877 : }
7878 : }
7879 8 : CSLDestroy(papszTokens);
7880 : }
7881 : }
7882 9 : else if (oMapVarIdToType[nVarId] == NC_BYTE)
7883 : {
7884 3 : if (!aoStart.empty())
7885 : {
7886 : char **papszTokens =
7887 3 : CSLTokenizeString2(osAccVal, " ,;", 0);
7888 3 : size_t nTokens = CSLCount(papszTokens);
7889 3 : if (nTokens >= nSize)
7890 : {
7891 : signed char *panVals = static_cast<signed char *>(
7892 3 : VSI_CALLOC_VERBOSE(nSize, sizeof(signed char)));
7893 3 : if (panVals)
7894 : {
7895 1203 : for (size_t i = 0; i < nSize; i++)
7896 : {
7897 1200 : panVals[i] = static_cast<signed char>(
7898 1200 : atoi(papszTokens[i]));
7899 : }
7900 3 : status = nc_put_vara_schar(nCdfId, nVarId,
7901 3 : &aoStart[0],
7902 3 : &aoEdge[0], panVals);
7903 3 : VSIFree(panVals);
7904 : }
7905 : }
7906 3 : CSLDestroy(papszTokens);
7907 : }
7908 : }
7909 6 : else if (oMapVarIdToType[nVarId] == NC_CHAR)
7910 : {
7911 6 : if (aoStart.size() == 2)
7912 : {
7913 4 : std::vector<CPLString> aoStrings;
7914 2 : bool bInString = false;
7915 4 : CPLString osCurString;
7916 935 : for (size_t i = 0; i < osAccVal.size();)
7917 : {
7918 933 : if (!bInString)
7919 : {
7920 8 : if (osAccVal[i] == '"')
7921 : {
7922 4 : bInString = true;
7923 4 : osCurString.clear();
7924 : }
7925 8 : i++;
7926 : }
7927 926 : else if (osAccVal[i] == '\\' &&
7928 926 : i + 1 < osAccVal.size() &&
7929 1 : osAccVal[i + 1] == '"')
7930 : {
7931 1 : osCurString += '"';
7932 1 : i += 2;
7933 : }
7934 924 : else if (osAccVal[i] == '"')
7935 : {
7936 4 : aoStrings.push_back(osCurString);
7937 4 : osCurString.clear();
7938 4 : bInString = false;
7939 4 : i++;
7940 : }
7941 : else
7942 : {
7943 920 : osCurString += osAccVal[i];
7944 920 : i++;
7945 : }
7946 : }
7947 2 : const size_t nRecords = oMapDimIdToDimLen[aoDimIds[0]];
7948 2 : const size_t nWidth = oMapDimIdToDimLen[aoDimIds[1]];
7949 2 : size_t nIters = aoStrings.size();
7950 2 : if (nIters > nRecords)
7951 0 : nIters = nRecords;
7952 6 : for (size_t i = 0; i < nIters; i++)
7953 : {
7954 : size_t anIndex[2];
7955 4 : anIndex[0] = i;
7956 4 : anIndex[1] = 0;
7957 : size_t anCount[2];
7958 4 : anCount[0] = 1;
7959 4 : anCount[1] = aoStrings[i].size();
7960 4 : if (anCount[1] > nWidth)
7961 0 : anCount[1] = nWidth;
7962 : status =
7963 4 : nc_put_vara_text(nCdfId, nVarId, anIndex,
7964 4 : anCount, aoStrings[i].c_str());
7965 4 : if (status != NC_NOERR)
7966 0 : break;
7967 : }
7968 : }
7969 : }
7970 17 : if (status != NC_NOERR)
7971 : {
7972 4 : CPLDebug("netCDF", "nc_put_var_(%s) failed: %s",
7973 : osVarName.c_str(), nc_strerror(status));
7974 : }
7975 : }
7976 : }
7977 : }
7978 :
7979 4 : GDAL_nc_close(nCdfId);
7980 4 : return true;
7981 : }
7982 :
7983 : #endif // ENABLE_NCDUMP
7984 :
7985 : /************************************************************************/
7986 : /* Open() */
7987 : /************************************************************************/
7988 :
7989 674 : GDALDataset *netCDFDataset::Open(GDALOpenInfo *poOpenInfo)
7990 :
7991 : {
7992 : #ifdef NCDF_DEBUG
7993 : CPLDebug("GDAL_netCDF", "\n=====\nOpen(), filename=[%s]",
7994 : poOpenInfo->pszFilename);
7995 : #endif
7996 :
7997 : // Does this appear to be a netcdf file?
7998 674 : NetCDFFormatEnum eTmpFormat = NCDF_FORMAT_NONE;
7999 674 : if (!STARTS_WITH_CI(poOpenInfo->pszFilename, "NETCDF:"))
8000 : {
8001 615 : eTmpFormat = netCDFIdentifyFormat(poOpenInfo, /* bCheckExt = */ true);
8002 : #ifdef NCDF_DEBUG
8003 : CPLDebug("GDAL_netCDF", "identified format %d", eTmpFormat);
8004 : #endif
8005 : // Note: not calling Identify() directly, because we want the file type.
8006 : // Only support NCDF_FORMAT* formats.
8007 615 : if (NCDF_FORMAT_NC == eTmpFormat || NCDF_FORMAT_NC2 == eTmpFormat ||
8008 2 : NCDF_FORMAT_NC4 == eTmpFormat || NCDF_FORMAT_NC4C == eTmpFormat)
8009 : {
8010 : // ok
8011 : }
8012 2 : else if (eTmpFormat == NCDF_FORMAT_HDF4 &&
8013 0 : poOpenInfo->IsSingleAllowedDriver("netCDF"))
8014 : {
8015 : // ok
8016 : }
8017 : else
8018 : {
8019 2 : return nullptr;
8020 : }
8021 : }
8022 : else
8023 : {
8024 : #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
8025 : // We don't necessarily want to catch bugs in libnetcdf ...
8026 : if (CPLGetConfigOption("DISABLE_OPEN_REAL_NETCDF_FILES", nullptr))
8027 : {
8028 : return nullptr;
8029 : }
8030 : #endif
8031 : }
8032 :
8033 672 : if (poOpenInfo->nOpenFlags & GDAL_OF_MULTIDIM_RASTER)
8034 : {
8035 182 : return OpenMultiDim(poOpenInfo);
8036 : }
8037 :
8038 980 : CPLMutexHolderD(&hNCMutex);
8039 :
8040 490 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll deadlock with
8041 : // GDALDataset own mutex.
8042 490 : netCDFDataset *poDS = new netCDFDataset();
8043 490 : poDS->papszOpenOptions = CSLDuplicate(poOpenInfo->papszOpenOptions);
8044 490 : CPLAcquireMutex(hNCMutex, 1000.0);
8045 :
8046 490 : poDS->SetDescription(poOpenInfo->pszFilename);
8047 :
8048 : // Check if filename start with NETCDF: tag.
8049 490 : bool bTreatAsSubdataset = false;
8050 980 : CPLString osSubdatasetName;
8051 :
8052 : #ifdef ENABLE_NCDUMP
8053 490 : const char *pszHeader =
8054 : reinterpret_cast<const char *>(poOpenInfo->pabyHeader);
8055 490 : if (poOpenInfo->fpL != nullptr && STARTS_WITH(pszHeader, "netcdf ") &&
8056 3 : strstr(pszHeader, "dimensions:") && strstr(pszHeader, "variables:"))
8057 : {
8058 : // By default create a temporary file that will be destroyed,
8059 : // unless NETCDF_TMP_FILE is defined. Can be useful to see which
8060 : // netCDF file has been generated from a potential fuzzed input.
8061 3 : poDS->osFilename = CPLGetConfigOption("NETCDF_TMP_FILE", "");
8062 3 : if (poDS->osFilename.empty())
8063 : {
8064 3 : poDS->bFileToDestroyAtClosing = true;
8065 3 : poDS->osFilename = CPLGenerateTempFilenameSafe("netcdf_tmp");
8066 : }
8067 3 : if (!netCDFDatasetCreateTempFile(eTmpFormat, poDS->osFilename,
8068 : poOpenInfo->fpL))
8069 : {
8070 0 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll
8071 : // deadlock with GDALDataset own mutex.
8072 0 : delete poDS;
8073 0 : CPLAcquireMutex(hNCMutex, 1000.0);
8074 0 : return nullptr;
8075 : }
8076 3 : bTreatAsSubdataset = false;
8077 3 : poDS->eFormat = eTmpFormat;
8078 : }
8079 : else
8080 : #endif
8081 :
8082 487 : if (STARTS_WITH_CI(poOpenInfo->pszFilename, "NETCDF:"))
8083 : {
8084 : char **papszName =
8085 59 : CSLTokenizeString2(poOpenInfo->pszFilename, ":",
8086 : CSLT_HONOURSTRINGS | CSLT_PRESERVEESCAPES);
8087 :
8088 118 : if (CSLCount(papszName) >= 3 &&
8089 59 : ((strlen(papszName[1]) == 1 && /* D:\\bla */
8090 0 : (papszName[2][0] == '/' || papszName[2][0] == '\\')) ||
8091 59 : EQUAL(papszName[1], "http") || EQUAL(papszName[1], "https") ||
8092 59 : EQUAL(papszName[1], "/vsicurl/http") ||
8093 59 : EQUAL(papszName[1], "/vsicurl/https") ||
8094 59 : EQUAL(papszName[1], "/vsicurl_streaming/http") ||
8095 59 : EQUAL(papszName[1], "/vsicurl_streaming/https")))
8096 : {
8097 0 : const int nCountBefore = CSLCount(papszName);
8098 0 : CPLString osTmp = papszName[1];
8099 0 : osTmp += ':';
8100 0 : osTmp += papszName[2];
8101 0 : CPLFree(papszName[1]);
8102 0 : CPLFree(papszName[2]);
8103 0 : papszName[1] = CPLStrdup(osTmp);
8104 0 : memmove(papszName + 2, papszName + 3,
8105 0 : (nCountBefore - 2) * sizeof(char *));
8106 : }
8107 :
8108 59 : if (CSLCount(papszName) == 3)
8109 : {
8110 59 : poDS->osFilename = papszName[1];
8111 59 : osSubdatasetName = papszName[2];
8112 59 : bTreatAsSubdataset = true;
8113 59 : CSLDestroy(papszName);
8114 : }
8115 0 : else if (CSLCount(papszName) == 2)
8116 : {
8117 0 : poDS->osFilename = papszName[1];
8118 0 : osSubdatasetName = "";
8119 0 : bTreatAsSubdataset = false;
8120 0 : CSLDestroy(papszName);
8121 : }
8122 : else
8123 : {
8124 0 : CSLDestroy(papszName);
8125 0 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll
8126 : // deadlock with GDALDataset own mutex.
8127 0 : delete poDS;
8128 0 : CPLAcquireMutex(hNCMutex, 1000.0);
8129 0 : CPLError(CE_Failure, CPLE_AppDefined,
8130 : "Failed to parse NETCDF: prefix string into expected 2, 3 "
8131 : "or 4 fields.");
8132 0 : return nullptr;
8133 : }
8134 :
8135 118 : if (!STARTS_WITH(poDS->osFilename, "http://") &&
8136 59 : !STARTS_WITH(poDS->osFilename, "https://"))
8137 : {
8138 : // Identify Format from real file, with bCheckExt=FALSE.
8139 : GDALOpenInfo *poOpenInfo2 =
8140 59 : new GDALOpenInfo(poDS->osFilename.c_str(), GA_ReadOnly);
8141 59 : poDS->eFormat =
8142 59 : netCDFIdentifyFormat(poOpenInfo2, /* bCheckExt = */ false);
8143 59 : delete poOpenInfo2;
8144 59 : if (NCDF_FORMAT_NONE == poDS->eFormat ||
8145 59 : NCDF_FORMAT_UNKNOWN == poDS->eFormat)
8146 : {
8147 0 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll
8148 : // deadlock with GDALDataset own mutex.
8149 0 : delete poDS;
8150 0 : CPLAcquireMutex(hNCMutex, 1000.0);
8151 0 : return nullptr;
8152 : }
8153 : }
8154 : }
8155 : else
8156 : {
8157 428 : poDS->osFilename = poOpenInfo->pszFilename;
8158 428 : bTreatAsSubdataset = false;
8159 428 : poDS->eFormat = eTmpFormat;
8160 : }
8161 :
8162 : // Try opening the dataset.
8163 : #if defined(NCDF_DEBUG) && defined(ENABLE_UFFD)
8164 : CPLDebug("GDAL_netCDF", "calling nc_open_mem(%s)",
8165 : poDS->osFilename.c_str());
8166 : #elif defined(NCDF_DEBUG) && !defined(ENABLE_UFFD)
8167 : CPLDebug("GDAL_netCDF", "calling nc_open(%s)", poDS->osFilename.c_str());
8168 : #endif
8169 490 : int cdfid = -1;
8170 490 : const int nMode = ((poOpenInfo->nOpenFlags & GDAL_OF_UPDATE) != 0)
8171 : ? NC_WRITE
8172 : : NC_NOWRITE;
8173 980 : CPLString osFilenameForNCOpen(poDS->osFilename);
8174 : #if defined(_WIN32) && !defined(NETCDF_USES_UTF8)
8175 : if (CPLTestBool(CPLGetConfigOption("GDAL_FILENAME_IS_UTF8", "YES")))
8176 : {
8177 : char *pszTemp = CPLRecode(osFilenameForNCOpen, CPL_ENC_UTF8, "CP_ACP");
8178 : osFilenameForNCOpen = pszTemp;
8179 : CPLFree(pszTemp);
8180 : }
8181 : #endif
8182 490 : int status2 = -1;
8183 :
8184 : #ifdef ENABLE_UFFD
8185 490 : cpl_uffd_context *pCtx = nullptr;
8186 : #endif
8187 :
8188 505 : if (STARTS_WITH(osFilenameForNCOpen, "/vsimem/") &&
8189 15 : poOpenInfo->eAccess == GA_ReadOnly)
8190 : {
8191 15 : vsi_l_offset nLength = 0;
8192 15 : poDS->fpVSIMEM = VSIFOpenL(osFilenameForNCOpen, "rb");
8193 15 : if (poDS->fpVSIMEM)
8194 : {
8195 : // We assume that the file will not be modified. If it is, then
8196 : // pabyBuffer might become invalid.
8197 : GByte *pabyBuffer =
8198 15 : VSIGetMemFileBuffer(osFilenameForNCOpen, &nLength, false);
8199 15 : if (pabyBuffer)
8200 : {
8201 15 : status2 = nc_open_mem(CPLGetFilename(osFilenameForNCOpen),
8202 : nMode, static_cast<size_t>(nLength),
8203 : pabyBuffer, &cdfid);
8204 : }
8205 : }
8206 : }
8207 : else
8208 : {
8209 : const bool bVsiFile =
8210 475 : !strncmp(osFilenameForNCOpen, "/vsi", strlen("/vsi"));
8211 : #ifdef ENABLE_UFFD
8212 475 : bool bReadOnly = (poOpenInfo->eAccess == GA_ReadOnly);
8213 475 : void *pVma = nullptr;
8214 475 : uint64_t nVmaSize = 0;
8215 :
8216 475 : if (bVsiFile)
8217 : {
8218 2 : if (bReadOnly)
8219 : {
8220 2 : if (CPLIsUserFaultMappingSupported())
8221 : {
8222 2 : pCtx = CPLCreateUserFaultMapping(osFilenameForNCOpen, &pVma,
8223 : &nVmaSize);
8224 : }
8225 : else
8226 : {
8227 0 : CPLError(CE_Failure, CPLE_AppDefined,
8228 : "Opening a /vsi file with the netCDF driver "
8229 : "requires Linux userfaultfd to be available. "
8230 : "If running from Docker, "
8231 : "--security-opt seccomp=unconfined might be "
8232 : "needed.%s",
8233 0 : ((poDS->eFormat == NCDF_FORMAT_NC4 ||
8234 0 : poDS->eFormat == NCDF_FORMAT_HDF5) &&
8235 0 : GDALGetDriverByName("HDF5"))
8236 : ? " Or you may set the GDAL_SKIP=netCDF "
8237 : "configuration option to force the use of "
8238 : "the HDF5 driver."
8239 : : "");
8240 : }
8241 : }
8242 : else
8243 : {
8244 0 : CPLError(CE_Failure, CPLE_AppDefined,
8245 : "Opening a /vsi file with the netCDF driver is only "
8246 : "supported in read-only mode");
8247 : }
8248 : }
8249 475 : if (pCtx != nullptr && pVma != nullptr && nVmaSize > 0)
8250 : {
8251 : // netCDF code, at least for netCDF 4.7.0, is confused by filenames
8252 : // like /vsicurl/http[s]://example.com/foo.nc, so just pass the
8253 : // final part
8254 2 : status2 = nc_open_mem(CPLGetFilename(osFilenameForNCOpen), nMode,
8255 : static_cast<size_t>(nVmaSize), pVma, &cdfid);
8256 : }
8257 : else
8258 473 : status2 = GDAL_nc_open(osFilenameForNCOpen, nMode, &cdfid);
8259 : #else
8260 : if (bVsiFile)
8261 : {
8262 : CPLError(
8263 : CE_Failure, CPLE_AppDefined,
8264 : "Opening a /vsi file with the netCDF driver requires Linux "
8265 : "userfaultfd to be available.%s",
8266 : ((poDS->eFormat == NCDF_FORMAT_NC4 ||
8267 : poDS->eFormat == NCDF_FORMAT_HDF5) &&
8268 : GDALGetDriverByName("HDF5"))
8269 : ? " Or you may set the GDAL_SKIP=netCDF "
8270 : "configuration option to force the use of the HDF5 "
8271 : "driver."
8272 : : "");
8273 : status2 = NC_EIO;
8274 : }
8275 : else
8276 : {
8277 : status2 = GDAL_nc_open(osFilenameForNCOpen, nMode, &cdfid);
8278 : }
8279 : #endif
8280 : }
8281 490 : if (status2 != NC_NOERR)
8282 : {
8283 : #ifdef NCDF_DEBUG
8284 : CPLDebug("GDAL_netCDF", "error opening");
8285 : #endif
8286 0 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll deadlock
8287 : // with GDALDataset own mutex.
8288 0 : delete poDS;
8289 0 : CPLAcquireMutex(hNCMutex, 1000.0);
8290 0 : return nullptr;
8291 : }
8292 : #ifdef NCDF_DEBUG
8293 : CPLDebug("GDAL_netCDF", "got cdfid=%d", cdfid);
8294 : #endif
8295 :
8296 : #if defined(ENABLE_NCDUMP) && !defined(_WIN32)
8297 : // Try to destroy the temporary file right now on Unix
8298 490 : if (poDS->bFileToDestroyAtClosing)
8299 : {
8300 3 : if (VSIUnlink(poDS->osFilename) == 0)
8301 : {
8302 3 : poDS->bFileToDestroyAtClosing = false;
8303 : }
8304 : }
8305 : #endif
8306 :
8307 : // Is this a real netCDF file?
8308 : int ndims;
8309 : int ngatts;
8310 : int nvars;
8311 : int unlimdimid;
8312 490 : int status = nc_inq(cdfid, &ndims, &nvars, &ngatts, &unlimdimid);
8313 490 : if (status != NC_NOERR)
8314 : {
8315 0 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll deadlock
8316 : // with GDALDataset own mutex.
8317 0 : delete poDS;
8318 0 : CPLAcquireMutex(hNCMutex, 1000.0);
8319 0 : return nullptr;
8320 : }
8321 :
8322 : // Get file type from netcdf.
8323 490 : int nTmpFormat = NCDF_FORMAT_NONE;
8324 490 : status = nc_inq_format(cdfid, &nTmpFormat);
8325 490 : if (status != NC_NOERR)
8326 : {
8327 0 : NCDF_ERR(status);
8328 : }
8329 : else
8330 : {
8331 490 : CPLDebug("GDAL_netCDF",
8332 : "driver detected file type=%d, libnetcdf detected type=%d",
8333 490 : poDS->eFormat, nTmpFormat);
8334 490 : if (static_cast<NetCDFFormatEnum>(nTmpFormat) != poDS->eFormat)
8335 : {
8336 : // Warn if file detection conflicts with that from libnetcdf
8337 : // except for NC4C, which we have no way of detecting initially.
8338 26 : if (nTmpFormat != NCDF_FORMAT_NC4C &&
8339 13 : !STARTS_WITH(poDS->osFilename, "http://") &&
8340 0 : !STARTS_WITH(poDS->osFilename, "https://"))
8341 : {
8342 0 : CPLError(CE_Warning, CPLE_AppDefined,
8343 : "NetCDF driver detected file type=%d, but libnetcdf "
8344 : "detected type=%d",
8345 0 : poDS->eFormat, nTmpFormat);
8346 : }
8347 13 : CPLDebug("GDAL_netCDF", "setting file type to %d, was %d",
8348 13 : nTmpFormat, poDS->eFormat);
8349 13 : poDS->eFormat = static_cast<NetCDFFormatEnum>(nTmpFormat);
8350 : }
8351 : }
8352 :
8353 : // Does the request variable exist?
8354 490 : if (bTreatAsSubdataset)
8355 : {
8356 : int dummy;
8357 59 : if (NCDFOpenSubDataset(cdfid, osSubdatasetName.c_str(), &dummy,
8358 59 : &dummy) != CE_None)
8359 : {
8360 0 : CPLError(CE_Warning, CPLE_AppDefined,
8361 : "%s is a netCDF file, but %s is not a variable.",
8362 : poOpenInfo->pszFilename, osSubdatasetName.c_str());
8363 :
8364 0 : GDAL_nc_close(cdfid);
8365 : #ifdef ENABLE_UFFD
8366 0 : NETCDF_UFFD_UNMAP(pCtx);
8367 : #endif
8368 0 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll
8369 : // deadlock with GDALDataset own mutex.
8370 0 : delete poDS;
8371 0 : CPLAcquireMutex(hNCMutex, 1000.0);
8372 0 : return nullptr;
8373 : }
8374 : }
8375 :
8376 : // Figure out whether or not the listed dataset has support for simple
8377 : // geometries (CF-1.8)
8378 490 : poDS->nCFVersion = nccfdriver::getCFVersion(cdfid);
8379 490 : bool bHasSimpleGeometries = false; // but not necessarily valid
8380 490 : if (poDS->nCFVersion >= 1.8)
8381 : {
8382 75 : bHasSimpleGeometries = poDS->DetectAndFillSGLayers(cdfid);
8383 75 : if (bHasSimpleGeometries)
8384 : {
8385 67 : poDS->bSGSupport = true;
8386 67 : poDS->vcdf.enableFullVirtualMode();
8387 : }
8388 : }
8389 :
8390 : char szConventions[NC_MAX_NAME + 1];
8391 490 : szConventions[0] = '\0';
8392 490 : nc_type nAttype = NC_NAT;
8393 490 : size_t nAttlen = 0;
8394 490 : nc_inq_att(cdfid, NC_GLOBAL, "Conventions", &nAttype, &nAttlen);
8395 980 : if (nAttlen >= sizeof(szConventions) ||
8396 490 : nc_get_att_text(cdfid, NC_GLOBAL, "Conventions", szConventions) !=
8397 : NC_NOERR)
8398 : {
8399 56 : CPLDebug("GDAL_netCDF", "No UNIDATA NC_GLOBAL:Conventions attribute");
8400 : // Note that 'Conventions' is always capital 'C' in CF spec.
8401 : }
8402 : else
8403 : {
8404 434 : szConventions[nAttlen] = '\0';
8405 : }
8406 :
8407 : // Create band information objects.
8408 490 : CPLDebug("GDAL_netCDF", "var_count = %d", nvars);
8409 :
8410 : // Create a corresponding GDALDataset.
8411 : // Create Netcdf Subdataset if filename as NETCDF tag.
8412 490 : poDS->cdfid = cdfid;
8413 : #ifdef ENABLE_UFFD
8414 490 : poDS->pCtx = pCtx;
8415 : #endif
8416 490 : poDS->eAccess = poOpenInfo->eAccess;
8417 490 : poDS->bDefineMode = false;
8418 :
8419 490 : poDS->ReadAttributes(cdfid, NC_GLOBAL);
8420 :
8421 : // Identify coordinate and boundary variables that we should
8422 : // ignore as Raster Bands.
8423 490 : char **papszIgnoreVars = nullptr;
8424 490 : NCDFGetCoordAndBoundVarFullNames(cdfid, &papszIgnoreVars);
8425 : // Filter variables to keep only valid 2+D raster bands and vector fields.
8426 490 : int nRasterVars = 0;
8427 490 : int nIgnoredVars = 0;
8428 490 : int nGroupID = -1;
8429 490 : int nVarID = -1;
8430 :
8431 : std::map<std::array<int, 3>, std::vector<std::pair<int, int>>>
8432 980 : oMap2DDimsToGroupAndVar;
8433 1131 : if ((poOpenInfo->nOpenFlags & GDAL_OF_VECTOR) != 0 &&
8434 151 : STARTS_WITH(CSLFetchNameValueDef(poDS->papszMetadata,
8435 : "NC_GLOBAL#mission_name", ""),
8436 1 : "Sentinel 3") &&
8437 1 : EQUAL(CSLFetchNameValueDef(poDS->papszMetadata,
8438 : "NC_GLOBAL#altimeter_sensor_name", ""),
8439 641 : "SRAL") &&
8440 1 : EQUAL(CSLFetchNameValueDef(poDS->papszMetadata,
8441 : "NC_GLOBAL#radiometer_sensor_name", ""),
8442 : "MWR"))
8443 : {
8444 1 : if (poDS->eAccess == GA_Update)
8445 : {
8446 0 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll
8447 : // deadlock with GDALDataset own mutex.
8448 0 : delete poDS;
8449 0 : return nullptr;
8450 : }
8451 1 : poDS->ProcessSentinel3_SRAL_MWR();
8452 : }
8453 : else
8454 : {
8455 489 : poDS->FilterVars(cdfid, (poOpenInfo->nOpenFlags & GDAL_OF_RASTER) != 0,
8456 639 : (poOpenInfo->nOpenFlags & GDAL_OF_VECTOR) != 0 &&
8457 150 : !bHasSimpleGeometries,
8458 : papszIgnoreVars, &nRasterVars, &nGroupID, &nVarID,
8459 : &nIgnoredVars, oMap2DDimsToGroupAndVar);
8460 : }
8461 490 : CSLDestroy(papszIgnoreVars);
8462 :
8463 : // Case where there is no raster variable
8464 490 : if (nRasterVars == 0 && !bTreatAsSubdataset)
8465 : {
8466 119 : poDS->GDALPamDataset::SetMetadata(poDS->papszMetadata);
8467 119 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll deadlock
8468 : // with GDALDataset own mutex.
8469 119 : poDS->TryLoadXML();
8470 : // If the dataset has been opened in raster mode only, exit
8471 119 : if ((poOpenInfo->nOpenFlags & GDAL_OF_RASTER) != 0 &&
8472 9 : (poOpenInfo->nOpenFlags & GDAL_OF_VECTOR) == 0)
8473 : {
8474 4 : delete poDS;
8475 4 : poDS = nullptr;
8476 : }
8477 : // Otherwise if the dataset is opened in vector mode, that there is
8478 : // no vector layer and we are in read-only, exit too.
8479 115 : else if (poDS->GetLayerCount() == 0 &&
8480 123 : (poOpenInfo->nOpenFlags & GDAL_OF_VECTOR) != 0 &&
8481 8 : poOpenInfo->eAccess == GA_ReadOnly)
8482 : {
8483 8 : delete poDS;
8484 8 : poDS = nullptr;
8485 : }
8486 119 : CPLAcquireMutex(hNCMutex, 1000.0);
8487 119 : return poDS;
8488 : }
8489 :
8490 : // We have more than one variable with 2 dimensions in the
8491 : // file, then treat this as a subdataset container dataset.
8492 371 : bool bSeveralVariablesAsBands = false;
8493 371 : const bool bListAllArrays = CPLTestBool(
8494 371 : CSLFetchNameValueDef(poDS->papszOpenOptions, "LIST_ALL_ARRAYS", "NO"));
8495 371 : if (bListAllArrays || ((nRasterVars > 1) && !bTreatAsSubdataset))
8496 : {
8497 28 : if (CPLFetchBool(poOpenInfo->papszOpenOptions, "VARIABLES_AS_BANDS",
8498 34 : false) &&
8499 6 : oMap2DDimsToGroupAndVar.size() == 1)
8500 : {
8501 6 : std::tie(nGroupID, nVarID) =
8502 12 : oMap2DDimsToGroupAndVar.begin()->second.front();
8503 6 : bSeveralVariablesAsBands = true;
8504 : }
8505 : else
8506 : {
8507 22 : poDS->CreateSubDatasetList(cdfid);
8508 22 : poDS->GDALPamDataset::SetMetadata(poDS->papszMetadata);
8509 22 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll
8510 : // deadlock with GDALDataset own mutex.
8511 22 : poDS->TryLoadXML();
8512 22 : CPLAcquireMutex(hNCMutex, 1000.0);
8513 22 : return poDS;
8514 : }
8515 : }
8516 :
8517 : // If we are not treating things as a subdataset, then capture
8518 : // the name of the single available variable as the subdataset.
8519 349 : if (!bTreatAsSubdataset)
8520 : {
8521 290 : char *pszVarName = nullptr;
8522 290 : NCDF_ERR(NCDFGetVarFullName(nGroupID, nVarID, &pszVarName));
8523 290 : osSubdatasetName = (pszVarName != nullptr ? pszVarName : "");
8524 290 : CPLFree(pszVarName);
8525 : }
8526 :
8527 : // We have ignored at least one variable, so we should report them
8528 : // as subdatasets for reference.
8529 349 : if (nIgnoredVars > 0 && !bTreatAsSubdataset)
8530 : {
8531 24 : CPLDebug("GDAL_netCDF",
8532 : "As %d variables were ignored, creating subdataset list "
8533 : "for reference. Variable #%d [%s] is the main variable",
8534 : nIgnoredVars, nVarID, osSubdatasetName.c_str());
8535 24 : poDS->CreateSubDatasetList(cdfid);
8536 : }
8537 :
8538 : // Open the NETCDF subdataset NETCDF:"filename":subdataset.
8539 349 : int var = -1;
8540 349 : NCDFOpenSubDataset(cdfid, osSubdatasetName.c_str(), &nGroupID, &var);
8541 : // Now we can forget the root cdfid and only use the selected group.
8542 349 : cdfid = nGroupID;
8543 349 : int nd = 0;
8544 349 : nc_inq_varndims(cdfid, var, &nd);
8545 :
8546 349 : poDS->m_anDimIds.resize(nd);
8547 :
8548 : // X, Y, Z position in array
8549 698 : std::vector<int> anBandDimPos(nd);
8550 :
8551 349 : nc_inq_vardimid(cdfid, var, poDS->m_anDimIds.data());
8552 :
8553 : // Check if somebody tried to pass a variable with less than 1D.
8554 349 : if (nd < 1)
8555 : {
8556 0 : CPLError(CE_Warning, CPLE_AppDefined,
8557 : "Variable has %d dimension(s) - not supported.", nd);
8558 0 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll deadlock
8559 : // with GDALDataset own mutex.
8560 0 : delete poDS;
8561 0 : CPLAcquireMutex(hNCMutex, 1000.0);
8562 0 : return nullptr;
8563 : }
8564 :
8565 : // CF-1 Convention
8566 : //
8567 : // Dimensions to appear in the relative order T, then Z, then Y,
8568 : // then X to the file. All other dimensions should, whenever
8569 : // possible, be placed to the left of the spatiotemporal
8570 : // dimensions.
8571 :
8572 : // Verify that dimensions are in the {T,Z,Y,X} or {T,Z,Y,X} order
8573 : // Ideally we should detect for other ordering and act accordingly
8574 : // Only done if file has Conventions=CF-* and only prints warning
8575 : // To disable set GDAL_NETCDF_VERIFY_DIMS=NO and to use only
8576 : // attributes (not varnames) set GDAL_NETCDF_VERIFY_DIMS=STRICT
8577 : const bool bCheckDims =
8578 698 : CPLTestBool(CPLGetConfigOption("GDAL_NETCDF_VERIFY_DIMS", "YES")) &&
8579 349 : STARTS_WITH_CI(szConventions, "CF");
8580 :
8581 349 : if (nd >= 2 && bCheckDims)
8582 : {
8583 265 : char szDimName1[NC_MAX_NAME + 1] = {};
8584 265 : char szDimName2[NC_MAX_NAME + 1] = {};
8585 265 : status = nc_inq_dimname(cdfid, poDS->m_anDimIds[nd - 1], szDimName1);
8586 265 : NCDF_ERR(status);
8587 265 : status = nc_inq_dimname(cdfid, poDS->m_anDimIds[nd - 2], szDimName2);
8588 265 : NCDF_ERR(status);
8589 422 : if (NCDFIsVarLongitude(cdfid, -1, szDimName1) == false &&
8590 157 : NCDFIsVarProjectionX(cdfid, -1, szDimName1) == false)
8591 : {
8592 4 : CPLError(CE_Warning, CPLE_AppDefined,
8593 : "dimension #%d (%s) is not a Longitude/X dimension.",
8594 : nd - 1, szDimName1);
8595 : }
8596 422 : if (NCDFIsVarLatitude(cdfid, -1, szDimName2) == false &&
8597 157 : NCDFIsVarProjectionY(cdfid, -1, szDimName2) == false)
8598 : {
8599 4 : CPLError(CE_Warning, CPLE_AppDefined,
8600 : "dimension #%d (%s) is not a Latitude/Y dimension.",
8601 : nd - 2, szDimName2);
8602 : }
8603 265 : if ((NCDFIsVarLongitude(cdfid, -1, szDimName2) ||
8604 267 : NCDFIsVarProjectionX(cdfid, -1, szDimName2)) &&
8605 2 : (NCDFIsVarLatitude(cdfid, -1, szDimName1) ||
8606 0 : NCDFIsVarProjectionY(cdfid, -1, szDimName1)))
8607 : {
8608 2 : poDS->bSwitchedXY = true;
8609 : }
8610 265 : if (nd >= 3)
8611 : {
8612 52 : char szDimName3[NC_MAX_NAME + 1] = {};
8613 : status =
8614 52 : nc_inq_dimname(cdfid, poDS->m_anDimIds[nd - 3], szDimName3);
8615 52 : NCDF_ERR(status);
8616 52 : if (nd >= 4)
8617 : {
8618 13 : char szDimName4[NC_MAX_NAME + 1] = {};
8619 : status =
8620 13 : nc_inq_dimname(cdfid, poDS->m_anDimIds[nd - 4], szDimName4);
8621 13 : NCDF_ERR(status);
8622 13 : if (NCDFIsVarVerticalCoord(cdfid, -1, szDimName3) == false)
8623 : {
8624 0 : CPLError(CE_Warning, CPLE_AppDefined,
8625 : "dimension #%d (%s) is not a Vertical dimension.",
8626 : nd - 3, szDimName3);
8627 : }
8628 13 : if (NCDFIsVarTimeCoord(cdfid, -1, szDimName4) == false)
8629 : {
8630 0 : CPLError(CE_Warning, CPLE_AppDefined,
8631 : "dimension #%d (%s) is not a Time dimension.",
8632 : nd - 4, szDimName4);
8633 : }
8634 : }
8635 : else
8636 : {
8637 75 : if (NCDFIsVarVerticalCoord(cdfid, -1, szDimName3) == false &&
8638 36 : NCDFIsVarTimeCoord(cdfid, -1, szDimName3) == false)
8639 : {
8640 0 : CPLError(CE_Warning, CPLE_AppDefined,
8641 : "dimension #%d (%s) is not a "
8642 : "Time or Vertical dimension.",
8643 : nd - 3, szDimName3);
8644 : }
8645 : }
8646 : }
8647 : }
8648 :
8649 : // For example for EMIT data (https://earth.jpl.nasa.gov/emit/data/data-portal/coverage-and-forecasts/),
8650 : // dimension order is downtrack, crosstrack, bands
8651 349 : bool bYXBandOrder = false;
8652 349 : if (nd == 3)
8653 : {
8654 44 : char szDimName[NC_MAX_NAME + 1] = {};
8655 44 : status = nc_inq_dimname(cdfid, poDS->m_anDimIds[2], szDimName);
8656 44 : NCDF_ERR(status);
8657 44 : bYXBandOrder =
8658 44 : strcmp(szDimName, "bands") == 0 || strcmp(szDimName, "band") == 0;
8659 : }
8660 :
8661 : // Get X dimensions information.
8662 : size_t xdim;
8663 349 : poDS->nXDimID = poDS->m_anDimIds[bYXBandOrder ? 1 : nd - 1];
8664 349 : nc_inq_dimlen(cdfid, poDS->nXDimID, &xdim);
8665 :
8666 : // Get Y dimension information.
8667 : size_t ydim;
8668 349 : if (nd >= 2)
8669 : {
8670 345 : poDS->nYDimID = poDS->m_anDimIds[bYXBandOrder ? 0 : nd - 2];
8671 345 : nc_inq_dimlen(cdfid, poDS->nYDimID, &ydim);
8672 : }
8673 : else
8674 : {
8675 4 : poDS->nYDimID = -1;
8676 4 : ydim = 1;
8677 : }
8678 :
8679 349 : if (xdim > INT_MAX || ydim > INT_MAX)
8680 : {
8681 0 : CPLError(CE_Failure, CPLE_AppDefined,
8682 : "Invalid raster dimensions: " CPL_FRMT_GUIB "x" CPL_FRMT_GUIB,
8683 : static_cast<GUIntBig>(xdim), static_cast<GUIntBig>(ydim));
8684 0 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll deadlock
8685 : // with GDALDataset own mutex.
8686 0 : delete poDS;
8687 0 : CPLAcquireMutex(hNCMutex, 1000.0);
8688 0 : return nullptr;
8689 : }
8690 :
8691 349 : poDS->nRasterXSize = static_cast<int>(xdim);
8692 349 : poDS->nRasterYSize = static_cast<int>(ydim);
8693 :
8694 349 : unsigned int k = 0;
8695 1122 : for (int j = 0; j < nd; j++)
8696 : {
8697 773 : if (poDS->m_anDimIds[j] == poDS->nXDimID)
8698 : {
8699 349 : anBandDimPos[0] = j; // Save Position of XDim
8700 349 : k++;
8701 : }
8702 773 : if (poDS->m_anDimIds[j] == poDS->nYDimID)
8703 : {
8704 345 : anBandDimPos[1] = j; // Save Position of YDim
8705 345 : k++;
8706 : }
8707 : }
8708 : // X and Y Dimension Ids were not found!
8709 349 : if ((nd >= 2 && k != 2) || (nd == 1 && k != 1))
8710 : {
8711 0 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll deadlock
8712 : // with GDALDataset own mutex.
8713 0 : delete poDS;
8714 0 : CPLAcquireMutex(hNCMutex, 1000.0);
8715 0 : return nullptr;
8716 : }
8717 :
8718 : // Read Metadata for this variable.
8719 :
8720 : // Should disable as is also done at band level, except driver needs the
8721 : // variables as metadata (e.g. projection).
8722 349 : poDS->ReadAttributes(cdfid, var);
8723 :
8724 : // Read Metadata for each dimension.
8725 349 : int *panDimIds = nullptr;
8726 349 : NCDFGetVisibleDims(cdfid, &ndims, &panDimIds);
8727 : // With NetCDF-4 groups panDimIds is not always [0..dim_count-1] like
8728 : // in NetCDF-3 because we see only the dimensions of the selected group
8729 : // and its parents.
8730 : // poDS->papszDimName is indexed by dim IDs, so it must contains all IDs
8731 : // [0..max(panDimIds)], but they are not all useful so we fill names
8732 : // of useless dims with empty string.
8733 349 : if (panDimIds)
8734 : {
8735 349 : const int nMaxDimId = *std::max_element(panDimIds, panDimIds + ndims);
8736 349 : std::set<int> oSetExistingDimIds;
8737 1158 : for (int i = 0; i < ndims; i++)
8738 : {
8739 809 : oSetExistingDimIds.insert(panDimIds[i]);
8740 : }
8741 349 : std::set<int> oSetDimIdsUsedByVar;
8742 1122 : for (int i = 0; i < nd; i++)
8743 : {
8744 773 : oSetDimIdsUsedByVar.insert(poDS->m_anDimIds[i]);
8745 : }
8746 1160 : for (int j = 0; j <= nMaxDimId; j++)
8747 : {
8748 : // Is j dim used?
8749 811 : if (oSetExistingDimIds.find(j) != oSetExistingDimIds.end())
8750 : {
8751 : // Useful dim.
8752 809 : char szTemp[NC_MAX_NAME + 1] = {};
8753 809 : status = nc_inq_dimname(cdfid, j, szTemp);
8754 809 : if (status != NC_NOERR)
8755 : {
8756 0 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll
8757 : // deadlock with GDALDataset own
8758 : // mutex.
8759 0 : delete poDS;
8760 0 : CPLAcquireMutex(hNCMutex, 1000.0);
8761 0 : return nullptr;
8762 : }
8763 809 : poDS->papszDimName.AddString(szTemp);
8764 :
8765 809 : if (oSetDimIdsUsedByVar.find(j) != oSetDimIdsUsedByVar.end())
8766 : {
8767 773 : int nDimGroupId = -1;
8768 773 : int nDimVarId = -1;
8769 773 : if (NCDFResolveVar(cdfid, poDS->papszDimName[j],
8770 773 : &nDimGroupId, &nDimVarId) == CE_None)
8771 : {
8772 573 : poDS->ReadAttributes(nDimGroupId, nDimVarId);
8773 : }
8774 : }
8775 : }
8776 : else
8777 : {
8778 : // Useless dim.
8779 2 : poDS->papszDimName.AddString("");
8780 : }
8781 : }
8782 349 : CPLFree(panDimIds);
8783 : }
8784 :
8785 : // Set projection info.
8786 698 : std::vector<std::string> aosRemovedMDItems;
8787 349 : if (nd > 1)
8788 : {
8789 345 : poDS->SetProjectionFromVar(cdfid, var,
8790 : /*bReadSRSOnly=*/false,
8791 : /* pszGivenGM = */ nullptr,
8792 : /* returnProjStr = */ nullptr,
8793 : /* sg = */ nullptr, &aosRemovedMDItems);
8794 : }
8795 :
8796 : // Override bottom-up with GDAL_NETCDF_BOTTOMUP config option.
8797 349 : const char *pszValue = CPLGetConfigOption("GDAL_NETCDF_BOTTOMUP", nullptr);
8798 349 : if (pszValue)
8799 : {
8800 24 : poDS->bBottomUp = CPLTestBool(pszValue);
8801 24 : CPLDebug("GDAL_netCDF",
8802 : "set bBottomUp=%d because GDAL_NETCDF_BOTTOMUP=%s",
8803 24 : static_cast<int>(poDS->bBottomUp), pszValue);
8804 : }
8805 :
8806 : // Save non-spatial dimension info.
8807 :
8808 349 : int *panBandZLev = nullptr;
8809 349 : int nDim = (nd >= 2) ? 2 : 1;
8810 : size_t lev_count;
8811 349 : size_t nTotLevCount = 1;
8812 349 : nc_type nType = NC_NAT;
8813 :
8814 698 : CPLString osExtraDimNames;
8815 :
8816 349 : if (nd > 2)
8817 : {
8818 60 : nDim = 2;
8819 60 : panBandZLev = static_cast<int *>(CPLCalloc(nd - 2, sizeof(int)));
8820 :
8821 60 : osExtraDimNames = "{";
8822 :
8823 60 : char szDimName[NC_MAX_NAME + 1] = {};
8824 :
8825 60 : bool bREPORT_EXTRA_DIM_VALUESWarningEmitted = false;
8826 259 : for (int j = 0; j < nd; j++)
8827 : {
8828 338 : if ((poDS->m_anDimIds[j] != poDS->nXDimID) &&
8829 139 : (poDS->m_anDimIds[j] != poDS->nYDimID))
8830 : {
8831 79 : nc_inq_dimlen(cdfid, poDS->m_anDimIds[j], &lev_count);
8832 79 : nTotLevCount *= lev_count;
8833 79 : panBandZLev[nDim - 2] = static_cast<int>(lev_count);
8834 79 : anBandDimPos[nDim] = j; // Save Position of ZDim
8835 : // Save non-spatial dimension names.
8836 79 : if (nc_inq_dimname(cdfid, poDS->m_anDimIds[j], szDimName) ==
8837 : NC_NOERR)
8838 : {
8839 79 : osExtraDimNames += szDimName;
8840 79 : if (j < nd - 3)
8841 : {
8842 19 : osExtraDimNames += ",";
8843 : }
8844 :
8845 79 : int nIdxGroupID = -1;
8846 79 : int nIdxVarID = Get1DVariableIndexedByDimension(
8847 79 : cdfid, poDS->m_anDimIds[j], szDimName, true,
8848 79 : &nIdxGroupID);
8849 79 : poDS->m_anExtraDimGroupIds.push_back(nIdxGroupID);
8850 79 : poDS->m_anExtraDimVarIds.push_back(nIdxVarID);
8851 :
8852 79 : if (nIdxVarID >= 0)
8853 : {
8854 70 : nc_inq_vartype(nIdxGroupID, nIdxVarID, &nType);
8855 : char szExtraDimDef[NC_MAX_NAME + 1];
8856 70 : snprintf(szExtraDimDef, sizeof(szExtraDimDef),
8857 : "{%ld,%d}", (long)lev_count, nType);
8858 : char szTemp[NC_MAX_NAME + 32 + 1];
8859 70 : snprintf(szTemp, sizeof(szTemp), "NETCDF_DIM_%s_DEF",
8860 : szDimName);
8861 70 : poDS->papszMetadata = CSLSetNameValue(
8862 : poDS->papszMetadata, szTemp, szExtraDimDef);
8863 :
8864 : // Retrieving data for unlimited dimensions might be
8865 : // costly on network storage, so don't do it.
8866 : // Each band will capture the value along the extra
8867 : // dimension in its NETCDF_DIM_xxxx band metadata item
8868 : // Addresses use case of
8869 : // https://lists.osgeo.org/pipermail/gdal-dev/2023-May/057209.html
8870 : const bool bIsLocal =
8871 70 : VSIIsLocal(osFilenameForNCOpen.c_str());
8872 : bool bListDimValues =
8873 71 : bIsLocal || lev_count == 1 ||
8874 1 : !NCDFIsUnlimitedDim(poDS->eFormat ==
8875 : NCDF_FORMAT_NC4,
8876 1 : cdfid, poDS->m_anDimIds[j]);
8877 : const char *pszGDAL_NETCDF_REPORT_EXTRA_DIM_VALUES =
8878 70 : CPLGetConfigOption(
8879 : "GDAL_NETCDF_REPORT_EXTRA_DIM_VALUES", nullptr);
8880 70 : if (pszGDAL_NETCDF_REPORT_EXTRA_DIM_VALUES)
8881 : {
8882 2 : bListDimValues = CPLTestBool(
8883 : pszGDAL_NETCDF_REPORT_EXTRA_DIM_VALUES);
8884 : }
8885 68 : else if (!bListDimValues && !bIsLocal &&
8886 1 : !bREPORT_EXTRA_DIM_VALUESWarningEmitted)
8887 : {
8888 1 : bREPORT_EXTRA_DIM_VALUESWarningEmitted = true;
8889 1 : CPLDebug(
8890 : "GDAL_netCDF",
8891 : "Listing extra dimension values is skipped "
8892 : "because this dataset is hosted on a network "
8893 : "file system, and such an operation could be "
8894 : "slow. If you still want to proceed, set the "
8895 : "GDAL_NETCDF_REPORT_EXTRA_DIM_VALUES "
8896 : "configuration option to YES");
8897 : }
8898 70 : if (bListDimValues)
8899 : {
8900 68 : char *pszTemp = nullptr;
8901 68 : if (NCDFGet1DVar(nIdxGroupID, nIdxVarID,
8902 68 : &pszTemp) == CE_None)
8903 : {
8904 68 : snprintf(szTemp, sizeof(szTemp),
8905 : "NETCDF_DIM_%s_VALUES", szDimName);
8906 68 : poDS->papszMetadata = CSLSetNameValue(
8907 : poDS->papszMetadata, szTemp, pszTemp);
8908 68 : CPLFree(pszTemp);
8909 : }
8910 : }
8911 : }
8912 : }
8913 : else
8914 : {
8915 0 : poDS->m_anExtraDimGroupIds.push_back(-1);
8916 0 : poDS->m_anExtraDimVarIds.push_back(-1);
8917 : }
8918 :
8919 79 : nDim++;
8920 : }
8921 : }
8922 60 : osExtraDimNames += "}";
8923 60 : poDS->papszMetadata = CSLSetNameValue(
8924 : poDS->papszMetadata, "NETCDF_DIM_EXTRA", osExtraDimNames);
8925 : }
8926 :
8927 : // Store Metadata.
8928 359 : for (const auto &osStr : aosRemovedMDItems)
8929 10 : poDS->papszMetadata =
8930 10 : CSLSetNameValue(poDS->papszMetadata, osStr.c_str(), nullptr);
8931 :
8932 349 : poDS->GDALPamDataset::SetMetadata(poDS->papszMetadata);
8933 :
8934 : // Create bands.
8935 :
8936 : // Arbitrary threshold.
8937 : int nMaxBandCount =
8938 349 : atoi(CPLGetConfigOption("GDAL_MAX_BAND_COUNT", "32768"));
8939 349 : if (nMaxBandCount <= 0)
8940 0 : nMaxBandCount = 32768;
8941 349 : if (nTotLevCount > static_cast<unsigned int>(nMaxBandCount))
8942 : {
8943 0 : CPLError(CE_Warning, CPLE_AppDefined,
8944 : "Limiting number of bands to %d instead of %u", nMaxBandCount,
8945 : static_cast<unsigned int>(nTotLevCount));
8946 0 : nTotLevCount = static_cast<unsigned int>(nMaxBandCount);
8947 : }
8948 349 : if (poDS->nRasterXSize == 0 || poDS->nRasterYSize == 0)
8949 : {
8950 0 : poDS->nRasterXSize = 0;
8951 0 : poDS->nRasterYSize = 0;
8952 0 : nTotLevCount = 0;
8953 0 : if (poDS->GetLayerCount() == 0)
8954 : {
8955 0 : CPLFree(panBandZLev);
8956 0 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll
8957 : // deadlock with GDALDataset own mutex.
8958 0 : delete poDS;
8959 0 : CPLAcquireMutex(hNCMutex, 1000.0);
8960 0 : return nullptr;
8961 : }
8962 : }
8963 349 : if (bSeveralVariablesAsBands)
8964 : {
8965 6 : const auto &listVariables = oMap2DDimsToGroupAndVar.begin()->second;
8966 24 : for (int iBand = 0; iBand < static_cast<int>(listVariables.size());
8967 : ++iBand)
8968 : {
8969 18 : int bandVarGroupId = listVariables[iBand].first;
8970 18 : int bandVarId = listVariables[iBand].second;
8971 : netCDFRasterBand *poBand = new netCDFRasterBand(
8972 0 : netCDFRasterBand::CONSTRUCTOR_OPEN(), poDS, bandVarGroupId,
8973 18 : bandVarId, nDim, 0, nullptr, anBandDimPos.data(), iBand + 1);
8974 18 : poDS->SetBand(iBand + 1, poBand);
8975 : }
8976 : }
8977 : else
8978 : {
8979 794 : for (unsigned int lev = 0; lev < nTotLevCount; lev++)
8980 : {
8981 : netCDFRasterBand *poBand = new netCDFRasterBand(
8982 0 : netCDFRasterBand::CONSTRUCTOR_OPEN(), poDS, cdfid, var, nDim,
8983 451 : lev, panBandZLev, anBandDimPos.data(), lev + 1);
8984 451 : poDS->SetBand(lev + 1, poBand);
8985 : }
8986 : }
8987 :
8988 349 : if (panBandZLev)
8989 60 : CPLFree(panBandZLev);
8990 : // Handle angular geographic coordinates here
8991 :
8992 : // Initialize any PAM information.
8993 349 : if (bTreatAsSubdataset)
8994 : {
8995 59 : poDS->SetPhysicalFilename(poDS->osFilename);
8996 59 : poDS->SetSubdatasetName(osSubdatasetName);
8997 : }
8998 :
8999 349 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll deadlock with
9000 : // GDALDataset own mutex.
9001 349 : poDS->TryLoadXML();
9002 :
9003 349 : if (bTreatAsSubdataset)
9004 59 : poDS->oOvManager.Initialize(poDS, ":::VIRTUAL:::");
9005 : else
9006 290 : poDS->oOvManager.Initialize(poDS, poDS->osFilename);
9007 :
9008 349 : CPLAcquireMutex(hNCMutex, 1000.0);
9009 :
9010 349 : return poDS;
9011 : }
9012 :
9013 : /************************************************************************/
9014 : /* CopyMetadata() */
9015 : /* */
9016 : /* Create a copy of metadata for NC_GLOBAL or a variable */
9017 : /************************************************************************/
9018 :
9019 155 : static void CopyMetadata(GDALDataset *poSrcDS, GDALRasterBand *poSrcBand,
9020 : GDALRasterBand *poDstBand, int nCdfId, int CDFVarID,
9021 : const char *pszPrefix)
9022 : {
9023 : // Remove the following band meta but set them later from band data.
9024 155 : const char *const papszIgnoreBand[] = {
9025 : CF_ADD_OFFSET, CF_SCALE_FACTOR, "valid_range", "_Unsigned",
9026 : NCDF_FillValue, "coordinates", nullptr};
9027 155 : const char *const papszIgnoreGlobal[] = {"NETCDF_DIM_EXTRA", nullptr};
9028 :
9029 155 : CSLConstList papszMetadata = nullptr;
9030 155 : if (poSrcDS)
9031 : {
9032 65 : papszMetadata = poSrcDS->GetMetadata();
9033 : }
9034 90 : else if (poSrcBand)
9035 : {
9036 90 : papszMetadata = poSrcBand->GetMetadata();
9037 : }
9038 :
9039 635 : for (const auto &[pszKey, pszValue] : cpl::IterateNameValue(papszMetadata))
9040 : {
9041 : #ifdef NCDF_DEBUG
9042 : CPLDebug("GDAL_netCDF", "copy metadata [%s]=[%s]", pszKey, pszValue);
9043 : #endif
9044 :
9045 480 : CPLString osMetaName(pszKey);
9046 :
9047 : // Check for items that match pszPrefix if applicable.
9048 480 : if (pszPrefix && !EQUAL(pszPrefix, ""))
9049 : {
9050 : // Remove prefix.
9051 115 : if (STARTS_WITH(osMetaName.c_str(), pszPrefix))
9052 : {
9053 17 : osMetaName = osMetaName.substr(strlen(pszPrefix));
9054 : }
9055 : // Only copy items that match prefix.
9056 : else
9057 : {
9058 98 : continue;
9059 : }
9060 : }
9061 :
9062 : // Fix various issues with metadata translation.
9063 382 : if (CDFVarID == NC_GLOBAL)
9064 : {
9065 : // Do not copy items in papszIgnoreGlobal and NETCDF_DIM_*.
9066 481 : if ((CSLFindString(papszIgnoreGlobal, osMetaName) != -1) ||
9067 238 : (STARTS_WITH(osMetaName, "NETCDF_DIM_")))
9068 21 : continue;
9069 : // Remove NC_GLOBAL prefix for netcdf global Metadata.
9070 222 : else if (STARTS_WITH(osMetaName, "NC_GLOBAL#"))
9071 : {
9072 33 : osMetaName = osMetaName.substr(strlen("NC_GLOBAL#"));
9073 : }
9074 : // GDAL Metadata renamed as GDAL-[meta].
9075 189 : else if (strstr(osMetaName, "#") == nullptr)
9076 : {
9077 16 : osMetaName = "GDAL_" + osMetaName;
9078 : }
9079 : // Keep time, lev and depth information for safe-keeping.
9080 : // Time and vertical coordinate handling need improvements.
9081 : /*
9082 : else if( STARTS_WITH(szMetaName, "time#") )
9083 : {
9084 : szMetaName[4] = '-';
9085 : }
9086 : else if( STARTS_WITH(szMetaName, "lev#") )
9087 : {
9088 : szMetaName[3] = '-';
9089 : }
9090 : else if( STARTS_WITH(szMetaName, "depth#") )
9091 : {
9092 : szMetaName[5] = '-';
9093 : }
9094 : */
9095 : // Only copy data without # (previously all data was copied).
9096 222 : if (strstr(osMetaName, "#") != nullptr)
9097 173 : continue;
9098 : // netCDF attributes do not like the '#' character.
9099 : // for( unsigned int h=0; h < strlen(szMetaName) -1 ; h++ ) {
9100 : // if( szMetaName[h] == '#') szMetaName[h] = '-';
9101 : // }
9102 : }
9103 : else
9104 : {
9105 : // Do not copy varname, stats, NETCDF_DIM_*, nodata
9106 : // and items in papszIgnoreBand.
9107 139 : if (STARTS_WITH(osMetaName, "NETCDF_VARNAME") ||
9108 107 : STARTS_WITH(osMetaName, "STATISTICS_") ||
9109 107 : STARTS_WITH(osMetaName, "NETCDF_DIM_") ||
9110 74 : STARTS_WITH(osMetaName, "missing_value") ||
9111 293 : STARTS_WITH(osMetaName, "_FillValue") ||
9112 47 : CSLFindString(papszIgnoreBand, osMetaName) != -1)
9113 97 : continue;
9114 : }
9115 :
9116 : #ifdef NCDF_DEBUG
9117 : CPLDebug("GDAL_netCDF", "copy name=[%s] value=[%s]", osMetaName.c_str(),
9118 : pszValue);
9119 : #endif
9120 91 : if (NCDFPutAttr(nCdfId, CDFVarID, osMetaName, pszValue) != CE_None)
9121 : {
9122 0 : CPLDebug("GDAL_netCDF", "NCDFPutAttr(%d, %d, %s, %s) failed",
9123 : nCdfId, CDFVarID, osMetaName.c_str(), pszValue);
9124 : }
9125 : }
9126 :
9127 : // Set add_offset and scale_factor here if present.
9128 155 : if (poSrcBand && poDstBand)
9129 : {
9130 :
9131 90 : int bGotAddOffset = FALSE;
9132 90 : const double dfAddOffset = poSrcBand->GetOffset(&bGotAddOffset);
9133 90 : int bGotScale = FALSE;
9134 90 : const double dfScale = poSrcBand->GetScale(&bGotScale);
9135 :
9136 90 : if (bGotAddOffset && dfAddOffset != 0.0)
9137 1 : poDstBand->SetOffset(dfAddOffset);
9138 90 : if (bGotScale && dfScale != 1.0)
9139 1 : poDstBand->SetScale(dfScale);
9140 : }
9141 155 : }
9142 :
9143 : /************************************************************************/
9144 : /* CreateLL() */
9145 : /* */
9146 : /* Shared functionality between netCDFDataset::Create() and */
9147 : /* netCDF::CreateCopy() for creating netcdf file based on a set of */
9148 : /* options and a configuration. */
9149 : /************************************************************************/
9150 :
9151 197 : netCDFDataset *netCDFDataset::CreateLL(const char *pszFilename, int nXSize,
9152 : int nYSize, int nBandsIn,
9153 : char **papszOptions)
9154 : {
9155 197 : if (!((nXSize == 0 && nYSize == 0 && nBandsIn == 0) ||
9156 125 : (nXSize > 0 && nYSize > 0 && nBandsIn > 0)))
9157 : {
9158 1 : return nullptr;
9159 : }
9160 :
9161 196 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll deadlock with
9162 : // GDALDataset own mutex.
9163 196 : netCDFDataset *poDS = new netCDFDataset();
9164 196 : CPLAcquireMutex(hNCMutex, 1000.0);
9165 :
9166 196 : poDS->nRasterXSize = nXSize;
9167 196 : poDS->nRasterYSize = nYSize;
9168 196 : poDS->eAccess = GA_Update;
9169 196 : poDS->osFilename = pszFilename;
9170 :
9171 : // From gtiff driver, is this ok?
9172 : /*
9173 : poDS->nBlockXSize = nXSize;
9174 : poDS->nBlockYSize = 1;
9175 : poDS->nBlocksPerBand =
9176 : ((nYSize + poDS->nBlockYSize - 1) / poDS->nBlockYSize)
9177 : * ((nXSize + poDS->nBlockXSize - 1) / poDS->nBlockXSize);
9178 : */
9179 :
9180 : // process options.
9181 196 : poDS->papszCreationOptions = CSLDuplicate(papszOptions);
9182 196 : poDS->ProcessCreationOptions();
9183 :
9184 196 : if (poDS->eMultipleLayerBehavior == SEPARATE_FILES)
9185 : {
9186 : VSIStatBuf sStat;
9187 2 : if (VSIStat(pszFilename, &sStat) == 0)
9188 : {
9189 0 : if (!VSI_ISDIR(sStat.st_mode))
9190 : {
9191 0 : CPLError(CE_Failure, CPLE_FileIO,
9192 : "%s is an existing file, but not a directory",
9193 : pszFilename);
9194 0 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll
9195 : // deadlock with GDALDataset own
9196 : // mutex.
9197 0 : delete poDS;
9198 0 : CPLAcquireMutex(hNCMutex, 1000.0);
9199 0 : return nullptr;
9200 : }
9201 : }
9202 2 : else if (VSIMkdir(pszFilename, 0755) != 0)
9203 : {
9204 1 : CPLError(CE_Failure, CPLE_FileIO, "Cannot create %s directory",
9205 : pszFilename);
9206 1 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll
9207 : // deadlock with GDALDataset own mutex.
9208 1 : delete poDS;
9209 1 : CPLAcquireMutex(hNCMutex, 1000.0);
9210 1 : return nullptr;
9211 : }
9212 :
9213 1 : return poDS;
9214 : }
9215 : // Create the dataset.
9216 388 : CPLString osFilenameForNCCreate(pszFilename);
9217 : #if defined(_WIN32) && !defined(NETCDF_USES_UTF8)
9218 : if (CPLTestBool(CPLGetConfigOption("GDAL_FILENAME_IS_UTF8", "YES")))
9219 : {
9220 : char *pszTemp =
9221 : CPLRecode(osFilenameForNCCreate, CPL_ENC_UTF8, "CP_ACP");
9222 : osFilenameForNCCreate = pszTemp;
9223 : CPLFree(pszTemp);
9224 : }
9225 : #endif
9226 :
9227 : #if defined(_WIN32)
9228 : {
9229 : // Works around bug of msys2 netCDF 4.9.0 package where nc_create()
9230 : // crashes
9231 : VSIStatBuf sStat;
9232 : const std::string osDirname =
9233 : CPLGetDirnameSafe(osFilenameForNCCreate.c_str());
9234 : if (VSIStat(osDirname.c_str(), &sStat) != 0)
9235 : {
9236 : CPLError(CE_Failure, CPLE_OpenFailed,
9237 : "Unable to create netCDF file %s: non existing output "
9238 : "directory",
9239 : pszFilename);
9240 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll
9241 : // deadlock with GDALDataset own mutex.
9242 : delete poDS;
9243 : CPLAcquireMutex(hNCMutex, 1000.0);
9244 : return nullptr;
9245 : }
9246 : }
9247 : #endif
9248 :
9249 : int status =
9250 194 : nc_create(osFilenameForNCCreate, poDS->nCreateMode, &(poDS->cdfid));
9251 :
9252 : // Put into define mode.
9253 194 : poDS->SetDefineMode(true);
9254 :
9255 194 : if (status != NC_NOERR)
9256 : {
9257 30 : CPLError(CE_Failure, CPLE_OpenFailed,
9258 : "Unable to create netCDF file %s (Error code %d): %s .",
9259 : pszFilename, status, nc_strerror(status));
9260 30 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll deadlock
9261 : // with GDALDataset own mutex.
9262 30 : delete poDS;
9263 30 : CPLAcquireMutex(hNCMutex, 1000.0);
9264 30 : return nullptr;
9265 : }
9266 :
9267 : // Define dimensions.
9268 164 : if (nXSize > 0 && nYSize > 0)
9269 : {
9270 111 : poDS->papszDimName.AddString(NCDF_DIMNAME_X);
9271 : status =
9272 111 : nc_def_dim(poDS->cdfid, NCDF_DIMNAME_X, nXSize, &(poDS->nXDimID));
9273 111 : NCDF_ERR(status);
9274 111 : CPLDebug("GDAL_netCDF", "status nc_def_dim(%d, %s, %d, -) got id %d",
9275 : poDS->cdfid, NCDF_DIMNAME_X, nXSize, poDS->nXDimID);
9276 :
9277 111 : poDS->papszDimName.AddString(NCDF_DIMNAME_Y);
9278 : status =
9279 111 : nc_def_dim(poDS->cdfid, NCDF_DIMNAME_Y, nYSize, &(poDS->nYDimID));
9280 111 : NCDF_ERR(status);
9281 111 : CPLDebug("GDAL_netCDF", "status nc_def_dim(%d, %s, %d, -) got id %d",
9282 : poDS->cdfid, NCDF_DIMNAME_Y, nYSize, poDS->nYDimID);
9283 : }
9284 :
9285 164 : return poDS;
9286 : }
9287 :
9288 : /************************************************************************/
9289 : /* Create() */
9290 : /************************************************************************/
9291 :
9292 126 : GDALDataset *netCDFDataset::Create(const char *pszFilename, int nXSize,
9293 : int nYSize, int nBandsIn, GDALDataType eType,
9294 : char **papszOptions)
9295 : {
9296 126 : CPLDebug("GDAL_netCDF", "\n=====\nnetCDFDataset::Create(%s, ...)",
9297 : pszFilename);
9298 :
9299 : const char *legacyCreationOp =
9300 126 : CSLFetchNameValueDef(papszOptions, "GEOMETRY_ENCODING", "CF_1.8");
9301 252 : std::string legacyCreationOp_s = std::string(legacyCreationOp);
9302 :
9303 : // Check legacy creation op FIRST
9304 :
9305 126 : bool legacyCreateMode = false;
9306 :
9307 126 : if (nXSize != 0 || nYSize != 0 || nBandsIn != 0)
9308 : {
9309 56 : legacyCreateMode = true;
9310 : }
9311 70 : else if (legacyCreationOp_s == "CF_1.8")
9312 : {
9313 54 : legacyCreateMode = false;
9314 : }
9315 :
9316 16 : else if (legacyCreationOp_s == "WKT")
9317 : {
9318 16 : legacyCreateMode = true;
9319 : }
9320 :
9321 : else
9322 : {
9323 0 : CPLError(
9324 : CE_Failure, CPLE_NotSupported,
9325 : "Dataset creation option GEOMETRY_ENCODING=%s is not supported.",
9326 : legacyCreationOp_s.c_str());
9327 0 : return nullptr;
9328 : }
9329 :
9330 252 : CPLStringList aosOptions(CSLDuplicate(papszOptions));
9331 238 : if (aosOptions.FetchNameValue("FORMAT") == nullptr &&
9332 112 : (eType == GDT_UInt16 || eType == GDT_UInt32 || eType == GDT_UInt64 ||
9333 : eType == GDT_Int64))
9334 : {
9335 10 : CPLDebug("netCDF", "Selecting FORMAT=NC4 due to data type");
9336 10 : aosOptions.SetNameValue("FORMAT", "NC4");
9337 : }
9338 :
9339 252 : CPLStringList aosBandNames;
9340 126 : if (const char *pszBandNames = aosOptions.FetchNameValue("BAND_NAMES"))
9341 : {
9342 : aosBandNames =
9343 2 : CSLTokenizeString2(pszBandNames, ",", CSLT_HONOURSTRINGS);
9344 :
9345 2 : if (aosBandNames.Count() != nBandsIn)
9346 : {
9347 1 : CPLError(CE_Failure, CPLE_OpenFailed,
9348 : "Attempted to create netCDF with %d bands but %d names "
9349 : "provided in BAND_NAMES.",
9350 : nBandsIn, aosBandNames.Count());
9351 :
9352 1 : return nullptr;
9353 : }
9354 : }
9355 :
9356 250 : CPLMutexHolderD(&hNCMutex);
9357 :
9358 125 : auto poDS = netCDFDataset::CreateLL(pszFilename, nXSize, nYSize, nBandsIn,
9359 : aosOptions.List());
9360 :
9361 125 : if (!poDS)
9362 19 : return nullptr;
9363 :
9364 106 : if (!legacyCreateMode)
9365 : {
9366 37 : poDS->bSGSupport = true;
9367 37 : poDS->vcdf.enableFullVirtualMode();
9368 : }
9369 :
9370 : else
9371 : {
9372 69 : poDS->bSGSupport = false;
9373 : }
9374 :
9375 : // Should we write signed or unsigned byte?
9376 : // TODO should this only be done in Create()
9377 106 : poDS->bSignedData = true;
9378 106 : const char *pszValue = CSLFetchNameValueDef(papszOptions, "PIXELTYPE", "");
9379 106 : if (eType == GDT_Byte && !EQUAL(pszValue, "SIGNEDBYTE"))
9380 15 : poDS->bSignedData = false;
9381 :
9382 : // Add Conventions, GDAL info and history.
9383 106 : if (poDS->cdfid >= 0)
9384 : {
9385 : const char *CF_Vector_Conv =
9386 173 : poDS->bSGSupport ||
9387 : // Use of variable length strings require CF-1.8
9388 68 : EQUAL(aosOptions.FetchNameValueDef("FORMAT", ""), "NC4")
9389 : ? NCDF_CONVENTIONS_CF_V1_8
9390 173 : : NCDF_CONVENTIONS_CF_V1_6;
9391 105 : poDS->bWriteGDALVersion = CPLTestBool(
9392 : CSLFetchNameValueDef(papszOptions, "WRITE_GDAL_VERSION", "YES"));
9393 105 : poDS->bWriteGDALHistory = CPLTestBool(
9394 : CSLFetchNameValueDef(papszOptions, "WRITE_GDAL_HISTORY", "YES"));
9395 105 : NCDFAddGDALHistory(poDS->cdfid, pszFilename, poDS->bWriteGDALVersion,
9396 105 : poDS->bWriteGDALHistory, "", "Create",
9397 : (nBandsIn == 0) ? CF_Vector_Conv
9398 : : GDAL_DEFAULT_NCDF_CONVENTIONS);
9399 : }
9400 :
9401 : // Define bands.
9402 197 : for (int iBand = 1; iBand <= nBandsIn; iBand++)
9403 : {
9404 : const char *pszBandName =
9405 91 : aosBandNames.empty() ? nullptr : aosBandNames[iBand - 1];
9406 :
9407 91 : poDS->SetBand(iBand, new netCDFRasterBand(
9408 91 : netCDFRasterBand::CONSTRUCTOR_CREATE(), poDS,
9409 91 : eType, iBand, poDS->bSignedData, pszBandName));
9410 : }
9411 :
9412 106 : CPLDebug("GDAL_netCDF", "netCDFDataset::Create(%s, ...) done", pszFilename);
9413 : // Return same dataset.
9414 106 : return poDS;
9415 : }
9416 :
9417 : template <class T>
9418 90 : static CPLErr NCDFCopyBand(GDALRasterBand *poSrcBand, GDALRasterBand *poDstBand,
9419 : int nXSize, int nYSize, GDALProgressFunc pfnProgress,
9420 : void *pProgressData)
9421 : {
9422 90 : GDALDataType eDT = poSrcBand->GetRasterDataType();
9423 90 : CPLErr eErr = CE_None;
9424 90 : T *patScanline = static_cast<T *>(CPLMalloc(nXSize * sizeof(T)));
9425 :
9426 2707 : for (int iLine = 0; iLine < nYSize && eErr == CE_None; iLine++)
9427 : {
9428 2617 : eErr = poSrcBand->RasterIO(GF_Read, 0, iLine, nXSize, 1, patScanline,
9429 : nXSize, 1, eDT, 0, 0, nullptr);
9430 2617 : if (eErr != CE_None)
9431 : {
9432 0 : CPLDebug(
9433 : "GDAL_netCDF",
9434 : "NCDFCopyBand(), poSrcBand->RasterIO() returned error code %d",
9435 : eErr);
9436 : }
9437 : else
9438 : {
9439 2617 : eErr =
9440 : poDstBand->RasterIO(GF_Write, 0, iLine, nXSize, 1, patScanline,
9441 : nXSize, 1, eDT, 0, 0, nullptr);
9442 2617 : if (eErr != CE_None)
9443 0 : CPLDebug("GDAL_netCDF",
9444 : "NCDFCopyBand(), poDstBand->RasterIO() returned error "
9445 : "code %d",
9446 : eErr);
9447 : }
9448 :
9449 2617 : if (nYSize > 10 && (iLine % (nYSize / 10) == 1))
9450 : {
9451 267 : if (!pfnProgress(1.0 * iLine / nYSize, nullptr, pProgressData))
9452 : {
9453 0 : eErr = CE_Failure;
9454 0 : CPLError(CE_Failure, CPLE_UserInterrupt,
9455 : "User terminated CreateCopy()");
9456 : }
9457 : }
9458 : }
9459 :
9460 90 : CPLFree(patScanline);
9461 :
9462 90 : pfnProgress(1.0, nullptr, pProgressData);
9463 :
9464 90 : return eErr;
9465 : }
9466 :
9467 : /************************************************************************/
9468 : /* CreateCopy() */
9469 : /************************************************************************/
9470 :
9471 : GDALDataset *
9472 81 : netCDFDataset::CreateCopy(const char *pszFilename, GDALDataset *poSrcDS,
9473 : CPL_UNUSED int bStrict, char **papszOptions,
9474 : GDALProgressFunc pfnProgress, void *pProgressData)
9475 : {
9476 162 : CPLMutexHolderD(&hNCMutex);
9477 :
9478 81 : CPLDebug("GDAL_netCDF", "\n=====\nnetCDFDataset::CreateCopy(%s, ...)",
9479 : pszFilename);
9480 :
9481 81 : if (poSrcDS->GetRootGroup())
9482 : {
9483 5 : auto poDrv = GDALDriver::FromHandle(GDALGetDriverByName("netCDF"));
9484 5 : if (poDrv)
9485 : {
9486 5 : return poDrv->DefaultCreateCopy(pszFilename, poSrcDS, bStrict,
9487 : papszOptions, pfnProgress,
9488 5 : pProgressData);
9489 : }
9490 : }
9491 :
9492 76 : const int nBands = poSrcDS->GetRasterCount();
9493 76 : const int nXSize = poSrcDS->GetRasterXSize();
9494 76 : const int nYSize = poSrcDS->GetRasterYSize();
9495 76 : const char *pszWKT = poSrcDS->GetProjectionRef();
9496 :
9497 : // Check input bands for errors.
9498 76 : if (nBands == 0)
9499 : {
9500 1 : CPLError(CE_Failure, CPLE_NotSupported,
9501 : "NetCDF driver does not support "
9502 : "source dataset with zero band.");
9503 1 : return nullptr;
9504 : }
9505 :
9506 75 : GDALDataType eDT = GDT_Unknown;
9507 75 : GDALRasterBand *poSrcBand = nullptr;
9508 179 : for (int iBand = 1; iBand <= nBands; iBand++)
9509 : {
9510 108 : poSrcBand = poSrcDS->GetRasterBand(iBand);
9511 108 : eDT = poSrcBand->GetRasterDataType();
9512 108 : if (eDT == GDT_Unknown || GDALDataTypeIsComplex(eDT))
9513 : {
9514 4 : CPLError(CE_Failure, CPLE_NotSupported,
9515 : "NetCDF driver does not support source dataset with band "
9516 : "of complex type.");
9517 4 : return nullptr;
9518 : }
9519 : }
9520 :
9521 142 : CPLStringList aosBandNames;
9522 71 : if (const char *pszBandNames =
9523 71 : CSLFetchNameValue(papszOptions, "BAND_NAMES"))
9524 : {
9525 : aosBandNames =
9526 2 : CSLTokenizeString2(pszBandNames, ",", CSLT_HONOURSTRINGS);
9527 :
9528 2 : if (aosBandNames.Count() != nBands)
9529 : {
9530 1 : CPLError(CE_Failure, CPLE_OpenFailed,
9531 : "Attempted to create netCDF with %d bands but %d names "
9532 : "provided in BAND_NAMES.",
9533 : nBands, aosBandNames.Count());
9534 :
9535 1 : return nullptr;
9536 : }
9537 : }
9538 :
9539 70 : if (!pfnProgress(0.0, nullptr, pProgressData))
9540 0 : return nullptr;
9541 :
9542 : // Same as in Create().
9543 140 : CPLStringList aosOptions(CSLDuplicate(papszOptions));
9544 131 : if (aosOptions.FetchNameValue("FORMAT") == nullptr &&
9545 61 : (eDT == GDT_UInt16 || eDT == GDT_UInt32 || eDT == GDT_UInt64 ||
9546 : eDT == GDT_Int64))
9547 : {
9548 6 : CPLDebug("netCDF", "Selecting FORMAT=NC4 due to data type");
9549 6 : aosOptions.SetNameValue("FORMAT", "NC4");
9550 : }
9551 70 : netCDFDataset *poDS = netCDFDataset::CreateLL(pszFilename, nXSize, nYSize,
9552 : nBands, aosOptions.List());
9553 70 : if (!poDS)
9554 13 : return nullptr;
9555 :
9556 : // Copy global metadata.
9557 : // Add Conventions, GDAL info and history.
9558 57 : CopyMetadata(poSrcDS, nullptr, nullptr, poDS->cdfid, NC_GLOBAL, nullptr);
9559 57 : const bool bWriteGDALVersion = CPLTestBool(
9560 : CSLFetchNameValueDef(papszOptions, "WRITE_GDAL_VERSION", "YES"));
9561 57 : const bool bWriteGDALHistory = CPLTestBool(
9562 : CSLFetchNameValueDef(papszOptions, "WRITE_GDAL_HISTORY", "YES"));
9563 57 : NCDFAddGDALHistory(
9564 : poDS->cdfid, pszFilename, bWriteGDALVersion, bWriteGDALHistory,
9565 57 : poSrcDS->GetMetadataItem("NC_GLOBAL#history"), "CreateCopy",
9566 57 : poSrcDS->GetMetadataItem("NC_GLOBAL#Conventions"));
9567 :
9568 57 : pfnProgress(0.1, nullptr, pProgressData);
9569 :
9570 : // Check for extra dimensions.
9571 57 : int nDim = 2;
9572 : char **papszExtraDimNames =
9573 57 : NCDFTokenizeArray(poSrcDS->GetMetadataItem("NETCDF_DIM_EXTRA", ""));
9574 57 : char **papszExtraDimValues = nullptr;
9575 :
9576 57 : if (papszExtraDimNames != nullptr && CSLCount(papszExtraDimNames) > 0)
9577 : {
9578 5 : size_t nDimSizeTot = 1;
9579 : // first make sure dimensions lengths compatible with band count
9580 : // for( int i=0; i<CSLCount(papszExtraDimNames ); i++ ) {
9581 13 : for (int i = CSLCount(papszExtraDimNames) - 1; i >= 0; i--)
9582 : {
9583 : char szTemp[NC_MAX_NAME + 32 + 1];
9584 8 : snprintf(szTemp, sizeof(szTemp), "NETCDF_DIM_%s_DEF",
9585 8 : papszExtraDimNames[i]);
9586 : papszExtraDimValues =
9587 8 : NCDFTokenizeArray(poSrcDS->GetMetadataItem(szTemp, ""));
9588 8 : const size_t nDimSize = atol(papszExtraDimValues[0]);
9589 8 : CSLDestroy(papszExtraDimValues);
9590 8 : nDimSizeTot *= nDimSize;
9591 : }
9592 5 : if (nDimSizeTot == (size_t)nBands)
9593 : {
9594 5 : nDim = 2 + CSLCount(papszExtraDimNames);
9595 : }
9596 : else
9597 : {
9598 : // if nBands != #bands computed raise a warning
9599 : // just issue a debug message, because it was probably intentional
9600 0 : CPLDebug("GDAL_netCDF",
9601 : "Warning: Number of bands (%d) is not compatible with "
9602 : "dimensions "
9603 : "(total=%ld names=%s)",
9604 : nBands, (long)nDimSizeTot,
9605 0 : poSrcDS->GetMetadataItem("NETCDF_DIM_EXTRA", ""));
9606 0 : CSLDestroy(papszExtraDimNames);
9607 0 : papszExtraDimNames = nullptr;
9608 : }
9609 : }
9610 :
9611 57 : int *panDimIds = static_cast<int *>(CPLCalloc(nDim, sizeof(int)));
9612 57 : int *panBandDimPos = static_cast<int *>(CPLCalloc(nDim, sizeof(int)));
9613 :
9614 : nc_type nVarType;
9615 57 : int *panBandZLev = nullptr;
9616 57 : int *panDimVarIds = nullptr;
9617 :
9618 57 : if (nDim > 2)
9619 : {
9620 5 : panBandZLev = static_cast<int *>(CPLCalloc(nDim - 2, sizeof(int)));
9621 5 : panDimVarIds = static_cast<int *>(CPLCalloc(nDim - 2, sizeof(int)));
9622 :
9623 : // Define all dims.
9624 13 : for (int i = CSLCount(papszExtraDimNames) - 1; i >= 0; i--)
9625 : {
9626 8 : poDS->papszDimName.AddString(papszExtraDimNames[i]);
9627 : char szTemp[NC_MAX_NAME + 32 + 1];
9628 8 : snprintf(szTemp, sizeof(szTemp), "NETCDF_DIM_%s_DEF",
9629 8 : papszExtraDimNames[i]);
9630 : papszExtraDimValues =
9631 8 : NCDFTokenizeArray(poSrcDS->GetMetadataItem(szTemp, ""));
9632 8 : const int nDimSize = papszExtraDimValues && papszExtraDimValues[0]
9633 16 : ? atoi(papszExtraDimValues[0])
9634 : : 0;
9635 : // nc_type is an enum in netcdf-3, needs casting.
9636 8 : nVarType = static_cast<nc_type>(papszExtraDimValues &&
9637 8 : papszExtraDimValues[0] &&
9638 8 : papszExtraDimValues[1]
9639 8 : ? atol(papszExtraDimValues[1])
9640 : : 0);
9641 8 : CSLDestroy(papszExtraDimValues);
9642 8 : panBandZLev[i] = nDimSize;
9643 8 : panBandDimPos[i + 2] = i; // Save Position of ZDim.
9644 :
9645 : // Define dim.
9646 16 : int status = nc_def_dim(poDS->cdfid, papszExtraDimNames[i],
9647 8 : nDimSize, &(panDimIds[i]));
9648 8 : NCDF_ERR(status);
9649 :
9650 : // Define dim var.
9651 8 : int anDim[1] = {panDimIds[i]};
9652 16 : status = nc_def_var(poDS->cdfid, papszExtraDimNames[i], nVarType, 1,
9653 8 : anDim, &(panDimVarIds[i]));
9654 8 : NCDF_ERR(status);
9655 :
9656 : // Add dim metadata, using global var# items.
9657 8 : snprintf(szTemp, sizeof(szTemp), "%s#", papszExtraDimNames[i]);
9658 8 : CopyMetadata(poSrcDS, nullptr, nullptr, poDS->cdfid,
9659 8 : panDimVarIds[i], szTemp);
9660 : }
9661 : }
9662 :
9663 : // Copy GeoTransform and Projection.
9664 :
9665 : // Copy geolocation info.
9666 57 : char **papszGeolocationInfo = poSrcDS->GetMetadata("GEOLOCATION");
9667 57 : if (papszGeolocationInfo != nullptr)
9668 5 : poDS->GDALPamDataset::SetMetadata(papszGeolocationInfo, "GEOLOCATION");
9669 :
9670 : // Copy geotransform.
9671 57 : bool bGotGeoTransform = false;
9672 : double adfGeoTransform[6];
9673 57 : CPLErr eErr = poSrcDS->GetGeoTransform(adfGeoTransform);
9674 57 : if (eErr == CE_None)
9675 : {
9676 39 : poDS->SetGeoTransform(adfGeoTransform);
9677 : // Disable AddProjectionVars() from being called.
9678 39 : bGotGeoTransform = true;
9679 39 : poDS->m_bHasGeoTransform = false;
9680 : }
9681 :
9682 : // Copy projection.
9683 57 : void *pScaledProgress = nullptr;
9684 57 : if (bGotGeoTransform || (pszWKT && pszWKT[0] != 0))
9685 : {
9686 40 : poDS->SetProjection(pszWKT ? pszWKT : "");
9687 :
9688 : // Now we can call AddProjectionVars() directly.
9689 40 : poDS->m_bHasGeoTransform = bGotGeoTransform;
9690 40 : poDS->AddProjectionVars(true, nullptr, nullptr);
9691 : pScaledProgress =
9692 40 : GDALCreateScaledProgress(0.1, 0.25, pfnProgress, pProgressData);
9693 40 : poDS->AddProjectionVars(false, GDALScaledProgress, pScaledProgress);
9694 40 : GDALDestroyScaledProgress(pScaledProgress);
9695 : }
9696 : else
9697 : {
9698 17 : poDS->bBottomUp =
9699 17 : CPL_TO_BOOL(CSLFetchBoolean(papszOptions, "WRITE_BOTTOMUP", TRUE));
9700 17 : if (papszGeolocationInfo)
9701 : {
9702 4 : poDS->AddProjectionVars(true, nullptr, nullptr);
9703 4 : poDS->AddProjectionVars(false, nullptr, nullptr);
9704 : }
9705 : }
9706 :
9707 : // Save X,Y dim positions.
9708 57 : panDimIds[nDim - 1] = poDS->nXDimID;
9709 57 : panBandDimPos[0] = nDim - 1;
9710 57 : panDimIds[nDim - 2] = poDS->nYDimID;
9711 57 : panBandDimPos[1] = nDim - 2;
9712 :
9713 : // Write extra dim values - after projection for optimization.
9714 57 : if (nDim > 2)
9715 : {
9716 : // Make sure we are in data mode.
9717 5 : static_cast<netCDFDataset *>(poDS)->SetDefineMode(false);
9718 13 : for (int i = CSLCount(papszExtraDimNames) - 1; i >= 0; i--)
9719 : {
9720 : char szTemp[NC_MAX_NAME + 32 + 1];
9721 8 : snprintf(szTemp, sizeof(szTemp), "NETCDF_DIM_%s_VALUES",
9722 8 : papszExtraDimNames[i]);
9723 8 : if (poSrcDS->GetMetadataItem(szTemp) != nullptr)
9724 : {
9725 8 : NCDFPut1DVar(poDS->cdfid, panDimVarIds[i],
9726 8 : poSrcDS->GetMetadataItem(szTemp));
9727 : }
9728 : }
9729 : }
9730 :
9731 57 : pfnProgress(0.25, nullptr, pProgressData);
9732 :
9733 : // Define Bands.
9734 57 : netCDFRasterBand *poBand = nullptr;
9735 57 : int nBandID = -1;
9736 :
9737 147 : for (int iBand = 1; iBand <= nBands; iBand++)
9738 : {
9739 90 : CPLDebug("GDAL_netCDF", "creating band # %d/%d nDim = %d", iBand,
9740 : nBands, nDim);
9741 :
9742 90 : poSrcBand = poSrcDS->GetRasterBand(iBand);
9743 90 : eDT = poSrcBand->GetRasterDataType();
9744 :
9745 : // Get var name from NETCDF_VARNAME.
9746 : const char *pszNETCDF_VARNAME =
9747 90 : poSrcBand->GetMetadataItem("NETCDF_VARNAME");
9748 : char szBandName[NC_MAX_NAME + 1];
9749 90 : if (!aosBandNames.empty())
9750 : {
9751 2 : snprintf(szBandName, sizeof(szBandName), "%s",
9752 : aosBandNames[iBand - 1]);
9753 : }
9754 88 : else if (pszNETCDF_VARNAME)
9755 : {
9756 32 : if (nBands > 1 && papszExtraDimNames == nullptr)
9757 0 : snprintf(szBandName, sizeof(szBandName), "%s%d",
9758 : pszNETCDF_VARNAME, iBand);
9759 : else
9760 32 : snprintf(szBandName, sizeof(szBandName), "%s",
9761 : pszNETCDF_VARNAME);
9762 : }
9763 : else
9764 : {
9765 56 : szBandName[0] = '\0';
9766 : }
9767 :
9768 : // Get long_name from <var>#long_name.
9769 90 : const char *pszLongName = "";
9770 90 : if (pszNETCDF_VARNAME)
9771 : {
9772 : pszLongName =
9773 64 : poSrcDS->GetMetadataItem(std::string(pszNETCDF_VARNAME)
9774 32 : .append("#")
9775 32 : .append(CF_LNG_NAME)
9776 32 : .c_str());
9777 32 : if (!pszLongName)
9778 25 : pszLongName = "";
9779 : }
9780 :
9781 90 : constexpr bool bSignedData = false;
9782 :
9783 90 : if (nDim > 2)
9784 27 : poBand = new netCDFRasterBand(
9785 27 : netCDFRasterBand::CONSTRUCTOR_CREATE(), poDS, eDT, iBand,
9786 : bSignedData, szBandName, pszLongName, nBandID, nDim, iBand - 1,
9787 27 : panBandZLev, panBandDimPos, panDimIds);
9788 : else
9789 63 : poBand = new netCDFRasterBand(
9790 63 : netCDFRasterBand::CONSTRUCTOR_CREATE(), poDS, eDT, iBand,
9791 63 : bSignedData, szBandName, pszLongName);
9792 :
9793 90 : poDS->SetBand(iBand, poBand);
9794 :
9795 : // Set nodata value, if any.
9796 90 : GDALCopyNoDataValue(poBand, poSrcBand);
9797 :
9798 : // Copy Metadata for band.
9799 90 : CopyMetadata(nullptr, poSrcDS->GetRasterBand(iBand), poBand,
9800 : poDS->cdfid, poBand->nZId);
9801 :
9802 : // If more than 2D pass the first band's netcdf var ID to subsequent
9803 : // bands.
9804 90 : if (nDim > 2)
9805 27 : nBandID = poBand->nZId;
9806 : }
9807 :
9808 : // Write projection variable to band variable.
9809 57 : poDS->AddGridMappingRef();
9810 :
9811 57 : pfnProgress(0.5, nullptr, pProgressData);
9812 :
9813 : // Write bands.
9814 :
9815 : // Make sure we are in data mode.
9816 57 : poDS->SetDefineMode(false);
9817 :
9818 57 : double dfTemp = 0.5;
9819 :
9820 57 : eErr = CE_None;
9821 :
9822 147 : for (int iBand = 1; iBand <= nBands && eErr == CE_None; iBand++)
9823 : {
9824 90 : const double dfTemp2 = dfTemp + 0.4 / nBands;
9825 90 : pScaledProgress = GDALCreateScaledProgress(dfTemp, dfTemp2, pfnProgress,
9826 : pProgressData);
9827 90 : dfTemp = dfTemp2;
9828 :
9829 90 : CPLDebug("GDAL_netCDF", "copying band data # %d/%d ", iBand, nBands);
9830 :
9831 90 : poSrcBand = poSrcDS->GetRasterBand(iBand);
9832 90 : eDT = poSrcBand->GetRasterDataType();
9833 :
9834 90 : GDALRasterBand *poDstBand = poDS->GetRasterBand(iBand);
9835 :
9836 : // Copy band data.
9837 90 : if (eDT == GDT_Byte)
9838 : {
9839 50 : CPLDebug("GDAL_netCDF", "GByte Band#%d", iBand);
9840 50 : eErr = NCDFCopyBand<GByte>(poSrcBand, poDstBand, nXSize, nYSize,
9841 : GDALScaledProgress, pScaledProgress);
9842 : }
9843 40 : else if (eDT == GDT_Int8)
9844 : {
9845 1 : CPLDebug("GDAL_netCDF", "GInt8 Band#%d", iBand);
9846 1 : eErr = NCDFCopyBand<GInt8>(poSrcBand, poDstBand, nXSize, nYSize,
9847 : GDALScaledProgress, pScaledProgress);
9848 : }
9849 39 : else if (eDT == GDT_UInt16)
9850 : {
9851 2 : CPLDebug("GDAL_netCDF", "GUInt16 Band#%d", iBand);
9852 2 : eErr = NCDFCopyBand<GInt16>(poSrcBand, poDstBand, nXSize, nYSize,
9853 : GDALScaledProgress, pScaledProgress);
9854 : }
9855 37 : else if (eDT == GDT_Int16)
9856 : {
9857 5 : CPLDebug("GDAL_netCDF", "GInt16 Band#%d", iBand);
9858 5 : eErr = NCDFCopyBand<GUInt16>(poSrcBand, poDstBand, nXSize, nYSize,
9859 : GDALScaledProgress, pScaledProgress);
9860 : }
9861 32 : else if (eDT == GDT_UInt32)
9862 : {
9863 2 : CPLDebug("GDAL_netCDF", "GUInt32 Band#%d", iBand);
9864 2 : eErr = NCDFCopyBand<GUInt32>(poSrcBand, poDstBand, nXSize, nYSize,
9865 : GDALScaledProgress, pScaledProgress);
9866 : }
9867 30 : else if (eDT == GDT_Int32)
9868 : {
9869 18 : CPLDebug("GDAL_netCDF", "GInt32 Band#%d", iBand);
9870 18 : eErr = NCDFCopyBand<GInt32>(poSrcBand, poDstBand, nXSize, nYSize,
9871 : GDALScaledProgress, pScaledProgress);
9872 : }
9873 12 : else if (eDT == GDT_UInt64)
9874 : {
9875 2 : CPLDebug("GDAL_netCDF", "GUInt64 Band#%d", iBand);
9876 2 : eErr = NCDFCopyBand<std::uint64_t>(poSrcBand, poDstBand, nXSize,
9877 : nYSize, GDALScaledProgress,
9878 : pScaledProgress);
9879 : }
9880 10 : else if (eDT == GDT_Int64)
9881 : {
9882 2 : CPLDebug("GDAL_netCDF", "GInt64 Band#%d", iBand);
9883 : eErr =
9884 2 : NCDFCopyBand<std::int64_t>(poSrcBand, poDstBand, nXSize, nYSize,
9885 : GDALScaledProgress, pScaledProgress);
9886 : }
9887 8 : else if (eDT == GDT_Float32)
9888 : {
9889 6 : CPLDebug("GDAL_netCDF", "float Band#%d", iBand);
9890 6 : eErr = NCDFCopyBand<float>(poSrcBand, poDstBand, nXSize, nYSize,
9891 : GDALScaledProgress, pScaledProgress);
9892 : }
9893 2 : else if (eDT == GDT_Float64)
9894 : {
9895 2 : CPLDebug("GDAL_netCDF", "double Band#%d", iBand);
9896 2 : eErr = NCDFCopyBand<double>(poSrcBand, poDstBand, nXSize, nYSize,
9897 : GDALScaledProgress, pScaledProgress);
9898 : }
9899 : else
9900 : {
9901 0 : CPLError(CE_Failure, CPLE_NotSupported,
9902 : "The NetCDF driver does not support GDAL data type %d",
9903 : eDT);
9904 : }
9905 :
9906 90 : GDALDestroyScaledProgress(pScaledProgress);
9907 : }
9908 :
9909 57 : delete (poDS);
9910 :
9911 57 : CPLFree(panDimIds);
9912 57 : CPLFree(panBandDimPos);
9913 57 : CPLFree(panBandZLev);
9914 57 : CPLFree(panDimVarIds);
9915 57 : if (papszExtraDimNames)
9916 5 : CSLDestroy(papszExtraDimNames);
9917 :
9918 57 : if (eErr != CE_None)
9919 0 : return nullptr;
9920 :
9921 57 : pfnProgress(0.95, nullptr, pProgressData);
9922 :
9923 : // Re-open dataset so we can return it.
9924 114 : CPLStringList aosOpenOptions;
9925 57 : aosOpenOptions.AddString("VARIABLES_AS_BANDS=YES");
9926 57 : GDALOpenInfo oOpenInfo(pszFilename, GA_Update);
9927 57 : oOpenInfo.nOpenFlags = GDAL_OF_RASTER | GDAL_OF_UPDATE;
9928 57 : oOpenInfo.papszOpenOptions = aosOpenOptions.List();
9929 57 : auto poRetDS = Open(&oOpenInfo);
9930 :
9931 : // PAM cloning is disabled. See bug #4244.
9932 : // if( poDS )
9933 : // poDS->CloneInfo(poSrcDS, GCIF_PAM_DEFAULT);
9934 :
9935 57 : pfnProgress(1.0, nullptr, pProgressData);
9936 :
9937 57 : return poRetDS;
9938 : }
9939 :
9940 : // Note: some logic depends on bIsProjected and bIsGeoGraphic.
9941 : // May not be known when Create() is called, see AddProjectionVars().
9942 253 : void netCDFDataset::ProcessCreationOptions()
9943 : {
9944 : const char *pszConfig =
9945 253 : CSLFetchNameValue(papszCreationOptions, "CONFIG_FILE");
9946 253 : if (pszConfig != nullptr)
9947 : {
9948 4 : if (oWriterConfig.Parse(pszConfig))
9949 : {
9950 : // Override dataset creation options from the config file
9951 2 : std::map<CPLString, CPLString>::iterator oIter;
9952 3 : for (oIter = oWriterConfig.m_oDatasetCreationOptions.begin();
9953 3 : oIter != oWriterConfig.m_oDatasetCreationOptions.end();
9954 1 : ++oIter)
9955 : {
9956 2 : papszCreationOptions = CSLSetNameValue(
9957 2 : papszCreationOptions, oIter->first, oIter->second);
9958 : }
9959 : }
9960 : }
9961 :
9962 : // File format.
9963 253 : eFormat = NCDF_FORMAT_NC;
9964 253 : const char *pszValue = CSLFetchNameValue(papszCreationOptions, "FORMAT");
9965 253 : if (pszValue != nullptr)
9966 : {
9967 93 : if (EQUAL(pszValue, "NC"))
9968 : {
9969 3 : eFormat = NCDF_FORMAT_NC;
9970 : }
9971 : #ifdef NETCDF_HAS_NC2
9972 90 : else if (EQUAL(pszValue, "NC2"))
9973 : {
9974 1 : eFormat = NCDF_FORMAT_NC2;
9975 : }
9976 : #endif
9977 89 : else if (EQUAL(pszValue, "NC4"))
9978 : {
9979 85 : eFormat = NCDF_FORMAT_NC4;
9980 : }
9981 4 : else if (EQUAL(pszValue, "NC4C"))
9982 : {
9983 4 : eFormat = NCDF_FORMAT_NC4C;
9984 : }
9985 : else
9986 : {
9987 0 : CPLError(CE_Failure, CPLE_NotSupported,
9988 : "FORMAT=%s in not supported, using the default NC format.",
9989 : pszValue);
9990 : }
9991 : }
9992 :
9993 : // COMPRESS option.
9994 253 : pszValue = CSLFetchNameValue(papszCreationOptions, "COMPRESS");
9995 253 : if (pszValue != nullptr)
9996 : {
9997 3 : if (EQUAL(pszValue, "NONE"))
9998 : {
9999 1 : eCompress = NCDF_COMPRESS_NONE;
10000 : }
10001 2 : else if (EQUAL(pszValue, "DEFLATE"))
10002 : {
10003 2 : eCompress = NCDF_COMPRESS_DEFLATE;
10004 2 : if (!((eFormat == NCDF_FORMAT_NC4) ||
10005 2 : (eFormat == NCDF_FORMAT_NC4C)))
10006 : {
10007 1 : CPLError(CE_Warning, CPLE_IllegalArg,
10008 : "NOTICE: Format set to NC4C because compression is "
10009 : "set to DEFLATE.");
10010 1 : eFormat = NCDF_FORMAT_NC4C;
10011 : }
10012 : }
10013 : else
10014 : {
10015 0 : CPLError(CE_Failure, CPLE_NotSupported,
10016 : "COMPRESS=%s is not supported.", pszValue);
10017 : }
10018 : }
10019 :
10020 : // ZLEVEL option.
10021 253 : pszValue = CSLFetchNameValue(papszCreationOptions, "ZLEVEL");
10022 253 : if (pszValue != nullptr)
10023 : {
10024 1 : nZLevel = atoi(pszValue);
10025 1 : if (!(nZLevel >= 1 && nZLevel <= 9))
10026 : {
10027 0 : CPLError(CE_Warning, CPLE_IllegalArg,
10028 : "ZLEVEL=%s value not recognised, ignoring.", pszValue);
10029 0 : nZLevel = NCDF_DEFLATE_LEVEL;
10030 : }
10031 : }
10032 :
10033 : // CHUNKING option.
10034 253 : bChunking =
10035 253 : CPL_TO_BOOL(CSLFetchBoolean(papszCreationOptions, "CHUNKING", TRUE));
10036 :
10037 : // MULTIPLE_LAYERS option.
10038 : const char *pszMultipleLayerBehavior =
10039 253 : CSLFetchNameValueDef(papszCreationOptions, "MULTIPLE_LAYERS", "NO");
10040 506 : const char *pszGeometryEnc = CSLFetchNameValueDef(
10041 253 : papszCreationOptions, "GEOMETRY_ENCODING", "CF_1.8");
10042 253 : if (EQUAL(pszMultipleLayerBehavior, "NO") ||
10043 3 : EQUAL(pszGeometryEnc, "CF_1.8"))
10044 : {
10045 250 : eMultipleLayerBehavior = SINGLE_LAYER;
10046 : }
10047 3 : else if (EQUAL(pszMultipleLayerBehavior, "SEPARATE_FILES"))
10048 : {
10049 2 : eMultipleLayerBehavior = SEPARATE_FILES;
10050 : }
10051 1 : else if (EQUAL(pszMultipleLayerBehavior, "SEPARATE_GROUPS"))
10052 : {
10053 1 : if (eFormat == NCDF_FORMAT_NC4)
10054 : {
10055 1 : eMultipleLayerBehavior = SEPARATE_GROUPS;
10056 : }
10057 : else
10058 : {
10059 0 : CPLError(CE_Warning, CPLE_IllegalArg,
10060 : "MULTIPLE_LAYERS=%s is recognised only with FORMAT=NC4",
10061 : pszMultipleLayerBehavior);
10062 : }
10063 : }
10064 : else
10065 : {
10066 0 : CPLError(CE_Warning, CPLE_IllegalArg,
10067 : "MULTIPLE_LAYERS=%s not recognised", pszMultipleLayerBehavior);
10068 : }
10069 :
10070 : // Set nCreateMode based on eFormat.
10071 253 : switch (eFormat)
10072 : {
10073 : #ifdef NETCDF_HAS_NC2
10074 1 : case NCDF_FORMAT_NC2:
10075 1 : nCreateMode = NC_CLOBBER | NC_64BIT_OFFSET;
10076 1 : break;
10077 : #endif
10078 85 : case NCDF_FORMAT_NC4:
10079 85 : nCreateMode = NC_CLOBBER | NC_NETCDF4;
10080 85 : break;
10081 5 : case NCDF_FORMAT_NC4C:
10082 5 : nCreateMode = NC_CLOBBER | NC_NETCDF4 | NC_CLASSIC_MODEL;
10083 5 : break;
10084 162 : case NCDF_FORMAT_NC:
10085 : default:
10086 162 : nCreateMode = NC_CLOBBER;
10087 162 : break;
10088 : }
10089 :
10090 253 : CPLDebug("GDAL_netCDF", "file options: format=%d compress=%d zlevel=%d",
10091 253 : eFormat, eCompress, nZLevel);
10092 253 : }
10093 :
10094 275 : int netCDFDataset::DefVarDeflate(int nVarId, bool bChunkingArg)
10095 : {
10096 275 : if (eCompress == NCDF_COMPRESS_DEFLATE)
10097 : {
10098 : // Must set chunk size to avoid huge performance hit (set
10099 : // bChunkingArg=TRUE)
10100 : // perhaps another solution it to change the chunk cache?
10101 : // http://www.unidata.ucar.edu/software/netcdf/docs/netcdf.html#Chunk-Cache
10102 : // TODO: make sure this is okay.
10103 2 : CPLDebug("GDAL_netCDF", "DefVarDeflate(%d, %d) nZlevel=%d", nVarId,
10104 : static_cast<int>(bChunkingArg), nZLevel);
10105 :
10106 2 : int status = nc_def_var_deflate(cdfid, nVarId, 1, 1, nZLevel);
10107 2 : NCDF_ERR(status);
10108 :
10109 2 : if (status == NC_NOERR && bChunkingArg && bChunking)
10110 : {
10111 : // set chunking to be 1 for all dims, except X dim
10112 : // size_t chunksize[] = { 1, (size_t)nRasterXSize };
10113 : size_t chunksize[MAX_NC_DIMS];
10114 : int nd;
10115 2 : nc_inq_varndims(cdfid, nVarId, &nd);
10116 2 : chunksize[0] = (size_t)1;
10117 2 : chunksize[1] = (size_t)1;
10118 2 : for (int i = 2; i < nd; i++)
10119 0 : chunksize[i] = (size_t)1;
10120 2 : chunksize[nd - 1] = (size_t)nRasterXSize;
10121 :
10122 : // Config options just for testing purposes
10123 : const char *pszBlockXSize =
10124 2 : CPLGetConfigOption("BLOCKXSIZE", nullptr);
10125 2 : if (pszBlockXSize)
10126 0 : chunksize[nd - 1] = (size_t)atoi(pszBlockXSize);
10127 :
10128 : const char *pszBlockYSize =
10129 2 : CPLGetConfigOption("BLOCKYSIZE", nullptr);
10130 2 : if (nd >= 2 && pszBlockYSize)
10131 0 : chunksize[nd - 2] = (size_t)atoi(pszBlockYSize);
10132 :
10133 2 : CPLDebug("GDAL_netCDF",
10134 : "DefVarDeflate() chunksize={%ld, %ld} chunkX=%ld nd=%d",
10135 2 : (long)chunksize[0], (long)chunksize[1],
10136 2 : (long)chunksize[nd - 1], nd);
10137 : #ifdef NCDF_DEBUG
10138 : for (int i = 0; i < nd; i++)
10139 : CPLDebug("GDAL_netCDF", "DefVarDeflate() chunk[%d]=%ld", i,
10140 : chunksize[i]);
10141 : #endif
10142 :
10143 2 : status = nc_def_var_chunking(cdfid, nVarId, NC_CHUNKED, chunksize);
10144 2 : NCDF_ERR(status);
10145 : }
10146 : else
10147 : {
10148 0 : CPLDebug("GDAL_netCDF", "chunksize not set");
10149 : }
10150 2 : return status;
10151 : }
10152 273 : return NC_NOERR;
10153 : }
10154 :
10155 : /************************************************************************/
10156 : /* NCDFUnloadDriver() */
10157 : /************************************************************************/
10158 :
10159 8 : static void NCDFUnloadDriver(CPL_UNUSED GDALDriver *poDriver)
10160 : {
10161 8 : if (hNCMutex != nullptr)
10162 4 : CPLDestroyMutex(hNCMutex);
10163 8 : hNCMutex = nullptr;
10164 8 : }
10165 :
10166 : /************************************************************************/
10167 : /* GDALRegister_netCDF() */
10168 : /************************************************************************/
10169 :
10170 : class GDALnetCDFDriver final : public GDALDriver
10171 : {
10172 : public:
10173 18 : GDALnetCDFDriver() = default;
10174 :
10175 1339 : const char *GetMetadataItem(const char *pszName,
10176 : const char *pszDomain) override
10177 : {
10178 1339 : if (EQUAL(pszName, GDAL_DCAP_VIRTUALIO))
10179 : {
10180 13 : InitializeDCAPVirtualIO();
10181 : }
10182 1339 : return GDALDriver::GetMetadataItem(pszName, pszDomain);
10183 : }
10184 :
10185 85 : char **GetMetadata(const char *pszDomain) override
10186 : {
10187 85 : InitializeDCAPVirtualIO();
10188 85 : return GDALDriver::GetMetadata(pszDomain);
10189 : }
10190 :
10191 : private:
10192 : bool m_bInitialized = false;
10193 :
10194 98 : void InitializeDCAPVirtualIO()
10195 : {
10196 98 : if (!m_bInitialized)
10197 : {
10198 12 : m_bInitialized = true;
10199 :
10200 : #ifdef ENABLE_UFFD
10201 12 : if (CPLIsUserFaultMappingSupported())
10202 : {
10203 12 : SetMetadataItem(GDAL_DCAP_VIRTUALIO, "YES");
10204 : }
10205 : #endif
10206 : }
10207 98 : }
10208 : };
10209 :
10210 18 : void GDALRegister_netCDF()
10211 :
10212 : {
10213 18 : if (!GDAL_CHECK_VERSION("netCDF driver"))
10214 0 : return;
10215 :
10216 18 : if (GDALGetDriverByName(DRIVER_NAME) != nullptr)
10217 0 : return;
10218 :
10219 18 : GDALDriver *poDriver = new GDALnetCDFDriver();
10220 18 : netCDFDriverSetCommonMetadata(poDriver);
10221 :
10222 18 : poDriver->SetMetadataItem("NETCDF_CONVENTIONS",
10223 18 : GDAL_DEFAULT_NCDF_CONVENTIONS);
10224 18 : poDriver->SetMetadataItem("NETCDF_VERSION", nc_inq_libvers());
10225 :
10226 : // Set pfns and register driver.
10227 18 : poDriver->pfnOpen = netCDFDataset::Open;
10228 18 : poDriver->pfnCreateCopy = netCDFDataset::CreateCopy;
10229 18 : poDriver->pfnCreate = netCDFDataset::Create;
10230 18 : poDriver->pfnCreateMultiDimensional = netCDFDataset::CreateMultiDimensional;
10231 18 : poDriver->pfnUnloadDriver = NCDFUnloadDriver;
10232 :
10233 18 : GetGDALDriverManager()->RegisterDriver(poDriver);
10234 : }
10235 :
10236 : /************************************************************************/
10237 : /* New functions */
10238 : /************************************************************************/
10239 :
10240 : /* Test for GDAL version string >= target */
10241 239 : static bool NCDFIsGDALVersionGTE(const char *pszVersion, int nTarget)
10242 : {
10243 :
10244 : // Valid strings are "GDAL 1.9dev, released 2011/01/18" and "GDAL 1.8.1 ".
10245 239 : if (pszVersion == nullptr || EQUAL(pszVersion, ""))
10246 0 : return false;
10247 239 : else if (!STARTS_WITH_CI(pszVersion, "GDAL "))
10248 0 : return false;
10249 : // 2.0dev of 2011/12/29 has been later renamed as 1.10dev.
10250 239 : else if (EQUAL("GDAL 2.0dev, released 2011/12/29", pszVersion))
10251 0 : return nTarget <= GDAL_COMPUTE_VERSION(1, 10, 0);
10252 239 : else if (STARTS_WITH_CI(pszVersion, "GDAL 1.9dev"))
10253 2 : return nTarget <= 1900;
10254 237 : else if (STARTS_WITH_CI(pszVersion, "GDAL 1.8dev"))
10255 0 : return nTarget <= 1800;
10256 :
10257 237 : char **papszTokens = CSLTokenizeString2(pszVersion + 5, ".", 0);
10258 :
10259 237 : int nVersions[] = {0, 0, 0, 0};
10260 948 : for (int iToken = 0; papszTokens && iToken < 4 && papszTokens[iToken];
10261 : iToken++)
10262 : {
10263 711 : nVersions[iToken] = atoi(papszTokens[iToken]);
10264 711 : if (nVersions[iToken] < 0)
10265 0 : nVersions[iToken] = 0;
10266 711 : else if (nVersions[iToken] > 99)
10267 0 : nVersions[iToken] = 99;
10268 : }
10269 :
10270 237 : int nVersion = 0;
10271 237 : if (nVersions[0] > 1 || nVersions[1] >= 10)
10272 237 : nVersion =
10273 237 : GDAL_COMPUTE_VERSION(nVersions[0], nVersions[1], nVersions[2]);
10274 : else
10275 0 : nVersion = nVersions[0] * 1000 + nVersions[1] * 100 +
10276 0 : nVersions[2] * 10 + nVersions[3];
10277 :
10278 237 : CSLDestroy(papszTokens);
10279 237 : return nTarget <= nVersion;
10280 : }
10281 :
10282 : // Add Conventions, GDAL version and history.
10283 166 : static void NCDFAddGDALHistory(int fpImage, const char *pszFilename,
10284 : bool bWriteGDALVersion, bool bWriteGDALHistory,
10285 : const char *pszOldHist,
10286 : const char *pszFunctionName,
10287 : const char *pszCFVersion)
10288 : {
10289 166 : if (pszCFVersion == nullptr)
10290 : {
10291 41 : pszCFVersion = GDAL_DEFAULT_NCDF_CONVENTIONS;
10292 : }
10293 166 : int status = nc_put_att_text(fpImage, NC_GLOBAL, "Conventions",
10294 : strlen(pszCFVersion), pszCFVersion);
10295 166 : NCDF_ERR(status);
10296 :
10297 166 : if (bWriteGDALVersion)
10298 : {
10299 164 : const char *pszNCDF_GDAL = GDALVersionInfo("--version");
10300 164 : status = nc_put_att_text(fpImage, NC_GLOBAL, "GDAL",
10301 : strlen(pszNCDF_GDAL), pszNCDF_GDAL);
10302 164 : NCDF_ERR(status);
10303 : }
10304 :
10305 166 : if (bWriteGDALHistory)
10306 : {
10307 : // Add history.
10308 328 : CPLString osTmp;
10309 : #ifdef GDAL_SET_CMD_LINE_DEFINED_TMP
10310 : if (!EQUAL(GDALGetCmdLine(), ""))
10311 : osTmp = GDALGetCmdLine();
10312 : else
10313 : osTmp =
10314 : CPLSPrintf("GDAL %s( %s, ... )", pszFunctionName, pszFilename);
10315 : #else
10316 164 : osTmp = CPLSPrintf("GDAL %s( %s, ... )", pszFunctionName, pszFilename);
10317 : #endif
10318 :
10319 164 : NCDFAddHistory(fpImage, osTmp.c_str(), pszOldHist);
10320 : }
10321 2 : else if (pszOldHist != nullptr)
10322 : {
10323 0 : status = nc_put_att_text(fpImage, NC_GLOBAL, "history",
10324 : strlen(pszOldHist), pszOldHist);
10325 0 : NCDF_ERR(status);
10326 : }
10327 166 : }
10328 :
10329 : // Code taken from cdo and libcdi, used for writing the history attribute.
10330 :
10331 : // void cdoDefHistory(int fileID, char *histstring)
10332 164 : static void NCDFAddHistory(int fpImage, const char *pszAddHist,
10333 : const char *pszOldHist)
10334 : {
10335 : // Check pszOldHist - as if there was no previous history, it will be
10336 : // a null pointer - if so set as empty.
10337 164 : if (nullptr == pszOldHist)
10338 : {
10339 52 : pszOldHist = "";
10340 : }
10341 :
10342 : char strtime[32];
10343 164 : strtime[0] = '\0';
10344 :
10345 164 : time_t tp = time(nullptr);
10346 164 : if (tp != -1)
10347 : {
10348 : struct tm ltime;
10349 164 : VSILocalTime(&tp, <ime);
10350 164 : (void)strftime(strtime, sizeof(strtime),
10351 : "%a %b %d %H:%M:%S %Y: ", <ime);
10352 : }
10353 :
10354 : // status = nc_get_att_text(fpImage, NC_GLOBAL,
10355 : // "history", pszOldHist);
10356 : // printf("status: %d pszOldHist: [%s]\n",status,pszOldHist);
10357 :
10358 164 : size_t nNewHistSize =
10359 164 : strlen(pszOldHist) + strlen(strtime) + strlen(pszAddHist) + 1 + 1;
10360 : char *pszNewHist =
10361 164 : static_cast<char *>(CPLMalloc(nNewHistSize * sizeof(char)));
10362 :
10363 164 : strcpy(pszNewHist, strtime);
10364 164 : strcat(pszNewHist, pszAddHist);
10365 :
10366 : // int disableHistory = FALSE;
10367 : // if( !disableHistory )
10368 : {
10369 164 : if (!EQUAL(pszOldHist, ""))
10370 3 : strcat(pszNewHist, "\n");
10371 164 : strcat(pszNewHist, pszOldHist);
10372 : }
10373 :
10374 164 : const int status = nc_put_att_text(fpImage, NC_GLOBAL, "history",
10375 : strlen(pszNewHist), pszNewHist);
10376 164 : NCDF_ERR(status);
10377 :
10378 164 : CPLFree(pszNewHist);
10379 164 : }
10380 :
10381 6010 : static CPLErr NCDFSafeStrcat(char **ppszDest, const char *pszSrc,
10382 : size_t *nDestSize)
10383 : {
10384 : /* Reallocate the data string until the content fits */
10385 6010 : while (*nDestSize < (strlen(*ppszDest) + strlen(pszSrc) + 1))
10386 : {
10387 394 : (*nDestSize) *= 2;
10388 394 : *ppszDest = static_cast<char *>(
10389 394 : CPLRealloc(reinterpret_cast<void *>(*ppszDest), *nDestSize));
10390 : #ifdef NCDF_DEBUG
10391 : CPLDebug("GDAL_netCDF", "NCDFSafeStrcat() resized str from %ld to %ld",
10392 : (*nDestSize) / 2, *nDestSize);
10393 : #endif
10394 : }
10395 5616 : strcat(*ppszDest, pszSrc);
10396 :
10397 5616 : return CE_None;
10398 : }
10399 :
10400 : /* helper function for NCDFGetAttr() */
10401 : /* if pdfValue != nullptr, sets *pdfValue to first value returned */
10402 : /* if ppszValue != nullptr, sets *ppszValue with all attribute values */
10403 : /* *ppszValue is the responsibility of the caller and must be freed */
10404 62786 : static CPLErr NCDFGetAttr1(int nCdfId, int nVarId, const char *pszAttrName,
10405 : double *pdfValue, char **ppszValue)
10406 : {
10407 62786 : nc_type nAttrType = NC_NAT;
10408 62786 : size_t nAttrLen = 0;
10409 :
10410 62786 : if (ppszValue)
10411 61640 : *ppszValue = nullptr;
10412 :
10413 62786 : int status = nc_inq_att(nCdfId, nVarId, pszAttrName, &nAttrType, &nAttrLen);
10414 62786 : if (status != NC_NOERR)
10415 33741 : return CE_Failure;
10416 :
10417 : #ifdef NCDF_DEBUG
10418 : CPLDebug("GDAL_netCDF", "NCDFGetAttr1(%s) len=%ld type=%d", pszAttrName,
10419 : nAttrLen, nAttrType);
10420 : #endif
10421 29045 : if (nAttrLen == 0 && nAttrType != NC_CHAR)
10422 1 : return CE_Failure;
10423 :
10424 : /* Allocate guaranteed minimum size (use 10 or 20 if not a string) */
10425 29044 : size_t nAttrValueSize = nAttrLen + 1;
10426 29044 : if (nAttrType != NC_CHAR && nAttrValueSize < 10)
10427 3139 : nAttrValueSize = 10;
10428 29044 : if (nAttrType == NC_DOUBLE && nAttrValueSize < 20)
10429 1547 : nAttrValueSize = 20;
10430 29044 : if (nAttrType == NC_INT64 && nAttrValueSize < 20)
10431 20 : nAttrValueSize = 22;
10432 : char *pszAttrValue =
10433 29044 : static_cast<char *>(CPLCalloc(nAttrValueSize, sizeof(char)));
10434 29044 : *pszAttrValue = '\0';
10435 :
10436 29044 : if (nAttrLen > 1 && nAttrType != NC_CHAR)
10437 572 : NCDFSafeStrcat(&pszAttrValue, "{", &nAttrValueSize);
10438 :
10439 29044 : double dfValue = 0.0;
10440 29044 : size_t m = 0;
10441 : char szTemp[256];
10442 29044 : bool bSetDoubleFromStr = false;
10443 :
10444 29044 : switch (nAttrType)
10445 : {
10446 25903 : case NC_CHAR:
10447 25903 : CPL_IGNORE_RET_VAL(
10448 25903 : nc_get_att_text(nCdfId, nVarId, pszAttrName, pszAttrValue));
10449 25903 : pszAttrValue[nAttrLen] = '\0';
10450 25903 : bSetDoubleFromStr = true;
10451 25903 : dfValue = 0.0;
10452 25903 : break;
10453 90 : case NC_BYTE:
10454 : {
10455 : signed char *pscTemp = static_cast<signed char *>(
10456 90 : CPLCalloc(nAttrLen, sizeof(signed char)));
10457 90 : nc_get_att_schar(nCdfId, nVarId, pszAttrName, pscTemp);
10458 90 : dfValue = static_cast<double>(pscTemp[0]);
10459 90 : if (nAttrLen > 1)
10460 : {
10461 20 : for (m = 0; m < nAttrLen - 1; m++)
10462 : {
10463 11 : snprintf(szTemp, sizeof(szTemp), "%d,", pscTemp[m]);
10464 11 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10465 : }
10466 : }
10467 90 : snprintf(szTemp, sizeof(szTemp), "%d", pscTemp[m]);
10468 90 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10469 90 : CPLFree(pscTemp);
10470 90 : break;
10471 : }
10472 475 : case NC_SHORT:
10473 : {
10474 : short *psTemp =
10475 475 : static_cast<short *>(CPLCalloc(nAttrLen, sizeof(short)));
10476 475 : nc_get_att_short(nCdfId, nVarId, pszAttrName, psTemp);
10477 475 : dfValue = static_cast<double>(psTemp[0]);
10478 475 : if (nAttrLen > 1)
10479 : {
10480 748 : for (m = 0; m < nAttrLen - 1; m++)
10481 : {
10482 374 : snprintf(szTemp, sizeof(szTemp), "%d,", psTemp[m]);
10483 374 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10484 : }
10485 : }
10486 475 : snprintf(szTemp, sizeof(szTemp), "%d", psTemp[m]);
10487 475 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10488 475 : CPLFree(psTemp);
10489 475 : break;
10490 : }
10491 524 : case NC_INT:
10492 : {
10493 524 : int *pnTemp = static_cast<int *>(CPLCalloc(nAttrLen, sizeof(int)));
10494 524 : nc_get_att_int(nCdfId, nVarId, pszAttrName, pnTemp);
10495 524 : dfValue = static_cast<double>(pnTemp[0]);
10496 524 : if (nAttrLen > 1)
10497 : {
10498 214 : for (m = 0; m < nAttrLen - 1; m++)
10499 : {
10500 137 : snprintf(szTemp, sizeof(szTemp), "%d,", pnTemp[m]);
10501 137 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10502 : }
10503 : }
10504 524 : snprintf(szTemp, sizeof(szTemp), "%d", pnTemp[m]);
10505 524 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10506 524 : CPLFree(pnTemp);
10507 524 : break;
10508 : }
10509 391 : case NC_FLOAT:
10510 : {
10511 : float *pfTemp =
10512 391 : static_cast<float *>(CPLCalloc(nAttrLen, sizeof(float)));
10513 391 : nc_get_att_float(nCdfId, nVarId, pszAttrName, pfTemp);
10514 391 : dfValue = static_cast<double>(pfTemp[0]);
10515 391 : if (nAttrLen > 1)
10516 : {
10517 56 : for (m = 0; m < nAttrLen - 1; m++)
10518 : {
10519 28 : CPLsnprintf(szTemp, sizeof(szTemp), "%.8g,", pfTemp[m]);
10520 28 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10521 : }
10522 : }
10523 391 : CPLsnprintf(szTemp, sizeof(szTemp), "%.8g", pfTemp[m]);
10524 391 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10525 391 : CPLFree(pfTemp);
10526 391 : break;
10527 : }
10528 1547 : case NC_DOUBLE:
10529 : {
10530 : double *pdfTemp =
10531 1547 : static_cast<double *>(CPLCalloc(nAttrLen, sizeof(double)));
10532 1547 : nc_get_att_double(nCdfId, nVarId, pszAttrName, pdfTemp);
10533 1547 : dfValue = pdfTemp[0];
10534 1547 : if (nAttrLen > 1)
10535 : {
10536 162 : for (m = 0; m < nAttrLen - 1; m++)
10537 : {
10538 88 : CPLsnprintf(szTemp, sizeof(szTemp), "%.16g,", pdfTemp[m]);
10539 88 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10540 : }
10541 : }
10542 1547 : CPLsnprintf(szTemp, sizeof(szTemp), "%.16g", pdfTemp[m]);
10543 1547 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10544 1547 : CPLFree(pdfTemp);
10545 1547 : break;
10546 : }
10547 8 : case NC_STRING:
10548 : {
10549 : char **ppszTemp =
10550 8 : static_cast<char **>(CPLCalloc(nAttrLen, sizeof(char *)));
10551 8 : nc_get_att_string(nCdfId, nVarId, pszAttrName, ppszTemp);
10552 8 : bSetDoubleFromStr = true;
10553 8 : dfValue = 0.0;
10554 8 : if (nAttrLen > 1)
10555 : {
10556 15 : for (m = 0; m < nAttrLen - 1; m++)
10557 : {
10558 10 : NCDFSafeStrcat(&pszAttrValue,
10559 10 : ppszTemp[m] ? ppszTemp[m] : "{NULL}",
10560 : &nAttrValueSize);
10561 10 : NCDFSafeStrcat(&pszAttrValue, ",", &nAttrValueSize);
10562 : }
10563 : }
10564 8 : NCDFSafeStrcat(&pszAttrValue, ppszTemp[m] ? ppszTemp[m] : "{NULL}",
10565 : &nAttrValueSize);
10566 8 : nc_free_string(nAttrLen, ppszTemp);
10567 8 : CPLFree(ppszTemp);
10568 8 : break;
10569 : }
10570 26 : case NC_UBYTE:
10571 : {
10572 : unsigned char *pucTemp = static_cast<unsigned char *>(
10573 26 : CPLCalloc(nAttrLen, sizeof(unsigned char)));
10574 26 : nc_get_att_uchar(nCdfId, nVarId, pszAttrName, pucTemp);
10575 26 : dfValue = static_cast<double>(pucTemp[0]);
10576 26 : if (nAttrLen > 1)
10577 : {
10578 0 : for (m = 0; m < nAttrLen - 1; m++)
10579 : {
10580 0 : CPLsnprintf(szTemp, sizeof(szTemp), "%u,", pucTemp[m]);
10581 0 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10582 : }
10583 : }
10584 26 : CPLsnprintf(szTemp, sizeof(szTemp), "%u", pucTemp[m]);
10585 26 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10586 26 : CPLFree(pucTemp);
10587 26 : break;
10588 : }
10589 24 : case NC_USHORT:
10590 : {
10591 : unsigned short *pusTemp;
10592 : pusTemp = static_cast<unsigned short *>(
10593 24 : CPLCalloc(nAttrLen, sizeof(unsigned short)));
10594 24 : nc_get_att_ushort(nCdfId, nVarId, pszAttrName, pusTemp);
10595 24 : dfValue = static_cast<double>(pusTemp[0]);
10596 24 : if (nAttrLen > 1)
10597 : {
10598 10 : for (m = 0; m < nAttrLen - 1; m++)
10599 : {
10600 5 : CPLsnprintf(szTemp, sizeof(szTemp), "%u,", pusTemp[m]);
10601 5 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10602 : }
10603 : }
10604 24 : CPLsnprintf(szTemp, sizeof(szTemp), "%u", pusTemp[m]);
10605 24 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10606 24 : CPLFree(pusTemp);
10607 24 : break;
10608 : }
10609 16 : case NC_UINT:
10610 : {
10611 : unsigned int *punTemp =
10612 16 : static_cast<unsigned int *>(CPLCalloc(nAttrLen, sizeof(int)));
10613 16 : nc_get_att_uint(nCdfId, nVarId, pszAttrName, punTemp);
10614 16 : dfValue = static_cast<double>(punTemp[0]);
10615 16 : if (nAttrLen > 1)
10616 : {
10617 0 : for (m = 0; m < nAttrLen - 1; m++)
10618 : {
10619 0 : CPLsnprintf(szTemp, sizeof(szTemp), "%u,", punTemp[m]);
10620 0 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10621 : }
10622 : }
10623 16 : CPLsnprintf(szTemp, sizeof(szTemp), "%u", punTemp[m]);
10624 16 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10625 16 : CPLFree(punTemp);
10626 16 : break;
10627 : }
10628 20 : case NC_INT64:
10629 : {
10630 : GIntBig *panTemp =
10631 20 : static_cast<GIntBig *>(CPLCalloc(nAttrLen, sizeof(GIntBig)));
10632 20 : nc_get_att_longlong(nCdfId, nVarId, pszAttrName, panTemp);
10633 20 : dfValue = static_cast<double>(panTemp[0]);
10634 20 : if (nAttrLen > 1)
10635 : {
10636 0 : for (m = 0; m < nAttrLen - 1; m++)
10637 : {
10638 0 : CPLsnprintf(szTemp, sizeof(szTemp), CPL_FRMT_GIB ",",
10639 0 : panTemp[m]);
10640 0 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10641 : }
10642 : }
10643 20 : CPLsnprintf(szTemp, sizeof(szTemp), CPL_FRMT_GIB, panTemp[m]);
10644 20 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10645 20 : CPLFree(panTemp);
10646 20 : break;
10647 : }
10648 20 : case NC_UINT64:
10649 : {
10650 : GUIntBig *panTemp =
10651 20 : static_cast<GUIntBig *>(CPLCalloc(nAttrLen, sizeof(GUIntBig)));
10652 20 : nc_get_att_ulonglong(nCdfId, nVarId, pszAttrName, panTemp);
10653 20 : dfValue = static_cast<double>(panTemp[0]);
10654 20 : if (nAttrLen > 1)
10655 : {
10656 0 : for (m = 0; m < nAttrLen - 1; m++)
10657 : {
10658 0 : CPLsnprintf(szTemp, sizeof(szTemp), CPL_FRMT_GUIB ",",
10659 0 : panTemp[m]);
10660 0 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10661 : }
10662 : }
10663 20 : CPLsnprintf(szTemp, sizeof(szTemp), CPL_FRMT_GUIB, panTemp[m]);
10664 20 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10665 20 : CPLFree(panTemp);
10666 20 : break;
10667 : }
10668 0 : default:
10669 0 : CPLDebug("GDAL_netCDF",
10670 : "NCDFGetAttr unsupported type %d for attribute %s",
10671 : nAttrType, pszAttrName);
10672 0 : break;
10673 : }
10674 :
10675 29044 : if (nAttrLen > 1 && nAttrType != NC_CHAR)
10676 572 : NCDFSafeStrcat(&pszAttrValue, "}", &nAttrValueSize);
10677 :
10678 29044 : if (bSetDoubleFromStr)
10679 : {
10680 25911 : if (CPLGetValueType(pszAttrValue) == CPL_VALUE_STRING)
10681 : {
10682 25729 : if (ppszValue == nullptr && pdfValue != nullptr)
10683 : {
10684 1 : CPLFree(pszAttrValue);
10685 1 : return CE_Failure;
10686 : }
10687 : }
10688 25910 : dfValue = CPLAtof(pszAttrValue);
10689 : }
10690 :
10691 : /* set return values */
10692 29043 : if (ppszValue)
10693 28731 : *ppszValue = pszAttrValue;
10694 : else
10695 312 : CPLFree(pszAttrValue);
10696 :
10697 29043 : if (pdfValue)
10698 312 : *pdfValue = dfValue;
10699 :
10700 29043 : return CE_None;
10701 : }
10702 :
10703 : /* sets pdfValue to first value found */
10704 1146 : CPLErr NCDFGetAttr(int nCdfId, int nVarId, const char *pszAttrName,
10705 : double *pdfValue)
10706 : {
10707 1146 : return NCDFGetAttr1(nCdfId, nVarId, pszAttrName, pdfValue, nullptr);
10708 : }
10709 :
10710 : /* pszValue is the responsibility of the caller and must be freed */
10711 61640 : CPLErr NCDFGetAttr(int nCdfId, int nVarId, const char *pszAttrName,
10712 : char **pszValue)
10713 : {
10714 61640 : return NCDFGetAttr1(nCdfId, nVarId, pszAttrName, nullptr, pszValue);
10715 : }
10716 :
10717 : /* By default write NC_CHAR, but detect for int/float/double and */
10718 : /* NC4 string arrays */
10719 106 : static CPLErr NCDFPutAttr(int nCdfId, int nVarId, const char *pszAttrName,
10720 : const char *pszValue)
10721 : {
10722 106 : int status = 0;
10723 106 : char *pszTemp = nullptr;
10724 :
10725 : /* get the attribute values as tokens */
10726 106 : char **papszValues = NCDFTokenizeArray(pszValue);
10727 106 : if (papszValues == nullptr)
10728 0 : return CE_Failure;
10729 :
10730 106 : size_t nAttrLen = CSLCount(papszValues);
10731 :
10732 : /* first detect type */
10733 106 : nc_type nAttrType = NC_CHAR;
10734 106 : nc_type nTmpAttrType = NC_CHAR;
10735 225 : for (size_t i = 0; i < nAttrLen; i++)
10736 : {
10737 119 : nTmpAttrType = NC_CHAR;
10738 119 : bool bFoundType = false;
10739 119 : errno = 0;
10740 119 : int nValue = static_cast<int>(strtol(papszValues[i], &pszTemp, 10));
10741 : /* test for int */
10742 : /* TODO test for Byte and short - can this be done safely? */
10743 119 : if (errno == 0 && papszValues[i] != pszTemp && *pszTemp == 0)
10744 : {
10745 : char szTemp[256];
10746 19 : CPLsnprintf(szTemp, sizeof(szTemp), "%d", nValue);
10747 19 : if (EQUAL(szTemp, papszValues[i]))
10748 : {
10749 19 : bFoundType = true;
10750 19 : nTmpAttrType = NC_INT;
10751 : }
10752 : else
10753 : {
10754 : unsigned int unValue = static_cast<unsigned int>(
10755 0 : strtoul(papszValues[i], &pszTemp, 10));
10756 0 : CPLsnprintf(szTemp, sizeof(szTemp), "%u", unValue);
10757 0 : if (EQUAL(szTemp, papszValues[i]))
10758 : {
10759 0 : bFoundType = true;
10760 0 : nTmpAttrType = NC_UINT;
10761 : }
10762 : }
10763 : }
10764 119 : if (!bFoundType)
10765 : {
10766 : /* test for double */
10767 100 : errno = 0;
10768 100 : double dfValue = CPLStrtod(papszValues[i], &pszTemp);
10769 100 : if ((errno == 0) && (papszValues[i] != pszTemp) && (*pszTemp == 0))
10770 : {
10771 : // Test for float instead of double.
10772 : // strtof() is C89, which is not available in MSVC.
10773 : // See if we loose precision if we cast to float and write to
10774 : // char*.
10775 14 : float fValue = float(dfValue);
10776 : char szTemp[256];
10777 14 : CPLsnprintf(szTemp, sizeof(szTemp), "%.8g", fValue);
10778 14 : if (EQUAL(szTemp, papszValues[i]))
10779 8 : nTmpAttrType = NC_FLOAT;
10780 : else
10781 6 : nTmpAttrType = NC_DOUBLE;
10782 : }
10783 : }
10784 119 : if ((nTmpAttrType <= NC_DOUBLE && nAttrType <= NC_DOUBLE &&
10785 99 : nTmpAttrType > nAttrType) ||
10786 99 : (nTmpAttrType == NC_UINT && nAttrType < NC_FLOAT) ||
10787 5 : (nTmpAttrType >= NC_FLOAT && nAttrType == NC_UINT))
10788 20 : nAttrType = nTmpAttrType;
10789 : }
10790 :
10791 : #ifdef DEBUG
10792 106 : if (EQUAL(pszAttrName, "DEBUG_EMPTY_DOUBLE_ATTR"))
10793 : {
10794 0 : nAttrType = NC_DOUBLE;
10795 0 : nAttrLen = 0;
10796 : }
10797 : #endif
10798 :
10799 : /* now write the data */
10800 106 : if (nAttrType == NC_CHAR)
10801 : {
10802 86 : int nTmpFormat = 0;
10803 86 : if (nAttrLen > 1)
10804 : {
10805 0 : status = nc_inq_format(nCdfId, &nTmpFormat);
10806 0 : NCDF_ERR(status);
10807 : }
10808 86 : if (nAttrLen > 1 && nTmpFormat == NCDF_FORMAT_NC4)
10809 0 : status = nc_put_att_string(nCdfId, nVarId, pszAttrName, nAttrLen,
10810 : const_cast<const char **>(papszValues));
10811 : else
10812 86 : status = nc_put_att_text(nCdfId, nVarId, pszAttrName,
10813 : strlen(pszValue), pszValue);
10814 86 : NCDF_ERR(status);
10815 : }
10816 : else
10817 : {
10818 20 : switch (nAttrType)
10819 : {
10820 11 : case NC_INT:
10821 : {
10822 : int *pnTemp =
10823 11 : static_cast<int *>(CPLCalloc(nAttrLen, sizeof(int)));
10824 30 : for (size_t i = 0; i < nAttrLen; i++)
10825 : {
10826 19 : pnTemp[i] =
10827 19 : static_cast<int>(strtol(papszValues[i], &pszTemp, 10));
10828 : }
10829 11 : status = nc_put_att_int(nCdfId, nVarId, pszAttrName, NC_INT,
10830 : nAttrLen, pnTemp);
10831 11 : NCDF_ERR(status);
10832 11 : CPLFree(pnTemp);
10833 11 : break;
10834 : }
10835 0 : case NC_UINT:
10836 : {
10837 : unsigned int *punTemp = static_cast<unsigned int *>(
10838 0 : CPLCalloc(nAttrLen, sizeof(unsigned int)));
10839 0 : for (size_t i = 0; i < nAttrLen; i++)
10840 : {
10841 0 : punTemp[i] = static_cast<unsigned int>(
10842 0 : strtol(papszValues[i], &pszTemp, 10));
10843 : }
10844 0 : status = nc_put_att_uint(nCdfId, nVarId, pszAttrName, NC_UINT,
10845 : nAttrLen, punTemp);
10846 0 : NCDF_ERR(status);
10847 0 : CPLFree(punTemp);
10848 0 : break;
10849 : }
10850 6 : case NC_FLOAT:
10851 : {
10852 : float *pfTemp =
10853 6 : static_cast<float *>(CPLCalloc(nAttrLen, sizeof(float)));
10854 14 : for (size_t i = 0; i < nAttrLen; i++)
10855 : {
10856 8 : pfTemp[i] =
10857 8 : static_cast<float>(CPLStrtod(papszValues[i], &pszTemp));
10858 : }
10859 6 : status = nc_put_att_float(nCdfId, nVarId, pszAttrName, NC_FLOAT,
10860 : nAttrLen, pfTemp);
10861 6 : NCDF_ERR(status);
10862 6 : CPLFree(pfTemp);
10863 6 : break;
10864 : }
10865 3 : case NC_DOUBLE:
10866 : {
10867 : double *pdfTemp =
10868 3 : static_cast<double *>(CPLCalloc(nAttrLen, sizeof(double)));
10869 9 : for (size_t i = 0; i < nAttrLen; i++)
10870 : {
10871 6 : pdfTemp[i] = CPLStrtod(papszValues[i], &pszTemp);
10872 : }
10873 3 : status = nc_put_att_double(nCdfId, nVarId, pszAttrName,
10874 : NC_DOUBLE, nAttrLen, pdfTemp);
10875 3 : NCDF_ERR(status);
10876 3 : CPLFree(pdfTemp);
10877 3 : break;
10878 : }
10879 0 : default:
10880 0 : if (papszValues)
10881 0 : CSLDestroy(papszValues);
10882 0 : return CE_Failure;
10883 : break;
10884 : }
10885 : }
10886 :
10887 106 : if (papszValues)
10888 106 : CSLDestroy(papszValues);
10889 :
10890 106 : return CE_None;
10891 : }
10892 :
10893 76 : static CPLErr NCDFGet1DVar(int nCdfId, int nVarId, char **pszValue)
10894 : {
10895 : /* get var information */
10896 76 : int nVarDimId = -1;
10897 76 : int status = nc_inq_varndims(nCdfId, nVarId, &nVarDimId);
10898 76 : if (status != NC_NOERR || nVarDimId != 1)
10899 0 : return CE_Failure;
10900 :
10901 76 : status = nc_inq_vardimid(nCdfId, nVarId, &nVarDimId);
10902 76 : if (status != NC_NOERR)
10903 0 : return CE_Failure;
10904 :
10905 76 : nc_type nVarType = NC_NAT;
10906 76 : status = nc_inq_vartype(nCdfId, nVarId, &nVarType);
10907 76 : if (status != NC_NOERR)
10908 0 : return CE_Failure;
10909 :
10910 76 : size_t nVarLen = 0;
10911 76 : status = nc_inq_dimlen(nCdfId, nVarDimId, &nVarLen);
10912 76 : if (status != NC_NOERR)
10913 0 : return CE_Failure;
10914 :
10915 76 : size_t start[1] = {0};
10916 76 : size_t count[1] = {nVarLen};
10917 :
10918 : /* Allocate guaranteed minimum size */
10919 76 : size_t nVarValueSize = NCDF_MAX_STR_LEN;
10920 : char *pszVarValue =
10921 76 : static_cast<char *>(CPLCalloc(nVarValueSize, sizeof(char)));
10922 76 : *pszVarValue = '\0';
10923 :
10924 76 : if (nVarLen == 0)
10925 : {
10926 : /* set return values */
10927 1 : *pszValue = pszVarValue;
10928 :
10929 1 : return CE_None;
10930 : }
10931 :
10932 75 : if (nVarLen > 1 && nVarType != NC_CHAR)
10933 40 : NCDFSafeStrcat(&pszVarValue, "{", &nVarValueSize);
10934 :
10935 75 : switch (nVarType)
10936 : {
10937 0 : case NC_CHAR:
10938 0 : nc_get_vara_text(nCdfId, nVarId, start, count, pszVarValue);
10939 0 : pszVarValue[nVarLen] = '\0';
10940 0 : break;
10941 0 : case NC_BYTE:
10942 : {
10943 : signed char *pscTemp = static_cast<signed char *>(
10944 0 : CPLCalloc(nVarLen, sizeof(signed char)));
10945 0 : nc_get_vara_schar(nCdfId, nVarId, start, count, pscTemp);
10946 : char szTemp[256];
10947 0 : size_t m = 0;
10948 0 : for (; m < nVarLen - 1; m++)
10949 : {
10950 0 : snprintf(szTemp, sizeof(szTemp), "%d,", pscTemp[m]);
10951 0 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
10952 : }
10953 0 : snprintf(szTemp, sizeof(szTemp), "%d", pscTemp[m]);
10954 0 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
10955 0 : CPLFree(pscTemp);
10956 0 : break;
10957 : }
10958 0 : case NC_SHORT:
10959 : {
10960 : short *psTemp =
10961 0 : static_cast<short *>(CPLCalloc(nVarLen, sizeof(short)));
10962 0 : nc_get_vara_short(nCdfId, nVarId, start, count, psTemp);
10963 : char szTemp[256];
10964 0 : size_t m = 0;
10965 0 : for (; m < nVarLen - 1; m++)
10966 : {
10967 0 : snprintf(szTemp, sizeof(szTemp), "%d,", psTemp[m]);
10968 0 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
10969 : }
10970 0 : snprintf(szTemp, sizeof(szTemp), "%d", psTemp[m]);
10971 0 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
10972 0 : CPLFree(psTemp);
10973 0 : break;
10974 : }
10975 19 : case NC_INT:
10976 : {
10977 19 : int *pnTemp = static_cast<int *>(CPLCalloc(nVarLen, sizeof(int)));
10978 19 : nc_get_vara_int(nCdfId, nVarId, start, count, pnTemp);
10979 : char szTemp[256];
10980 19 : size_t m = 0;
10981 36 : for (; m < nVarLen - 1; m++)
10982 : {
10983 17 : snprintf(szTemp, sizeof(szTemp), "%d,", pnTemp[m]);
10984 17 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
10985 : }
10986 19 : snprintf(szTemp, sizeof(szTemp), "%d", pnTemp[m]);
10987 19 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
10988 19 : CPLFree(pnTemp);
10989 19 : break;
10990 : }
10991 8 : case NC_FLOAT:
10992 : {
10993 : float *pfTemp =
10994 8 : static_cast<float *>(CPLCalloc(nVarLen, sizeof(float)));
10995 8 : nc_get_vara_float(nCdfId, nVarId, start, count, pfTemp);
10996 : char szTemp[256];
10997 8 : size_t m = 0;
10998 325 : for (; m < nVarLen - 1; m++)
10999 : {
11000 317 : CPLsnprintf(szTemp, sizeof(szTemp), "%.8g,", pfTemp[m]);
11001 317 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11002 : }
11003 8 : CPLsnprintf(szTemp, sizeof(szTemp), "%.8g", pfTemp[m]);
11004 8 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11005 8 : CPLFree(pfTemp);
11006 8 : break;
11007 : }
11008 47 : case NC_DOUBLE:
11009 : {
11010 : double *pdfTemp =
11011 47 : static_cast<double *>(CPLCalloc(nVarLen, sizeof(double)));
11012 47 : nc_get_vara_double(nCdfId, nVarId, start, count, pdfTemp);
11013 : char szTemp[256];
11014 47 : size_t m = 0;
11015 225 : for (; m < nVarLen - 1; m++)
11016 : {
11017 178 : CPLsnprintf(szTemp, sizeof(szTemp), "%.16g,", pdfTemp[m]);
11018 178 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11019 : }
11020 47 : CPLsnprintf(szTemp, sizeof(szTemp), "%.16g", pdfTemp[m]);
11021 47 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11022 47 : CPLFree(pdfTemp);
11023 47 : break;
11024 : }
11025 0 : case NC_STRING:
11026 : {
11027 : char **ppszTemp =
11028 0 : static_cast<char **>(CPLCalloc(nVarLen, sizeof(char *)));
11029 0 : nc_get_vara_string(nCdfId, nVarId, start, count, ppszTemp);
11030 0 : size_t m = 0;
11031 0 : for (; m < nVarLen - 1; m++)
11032 : {
11033 0 : NCDFSafeStrcat(&pszVarValue, ppszTemp[m], &nVarValueSize);
11034 0 : NCDFSafeStrcat(&pszVarValue, ",", &nVarValueSize);
11035 : }
11036 0 : NCDFSafeStrcat(&pszVarValue, ppszTemp[m], &nVarValueSize);
11037 0 : nc_free_string(nVarLen, ppszTemp);
11038 0 : CPLFree(ppszTemp);
11039 0 : break;
11040 : }
11041 0 : case NC_UBYTE:
11042 : {
11043 : unsigned char *pucTemp;
11044 : pucTemp = static_cast<unsigned char *>(
11045 0 : CPLCalloc(nVarLen, sizeof(unsigned char)));
11046 0 : nc_get_vara_uchar(nCdfId, nVarId, start, count, pucTemp);
11047 : char szTemp[256];
11048 0 : size_t m = 0;
11049 0 : for (; m < nVarLen - 1; m++)
11050 : {
11051 0 : CPLsnprintf(szTemp, sizeof(szTemp), "%u,", pucTemp[m]);
11052 0 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11053 : }
11054 0 : CPLsnprintf(szTemp, sizeof(szTemp), "%u", pucTemp[m]);
11055 0 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11056 0 : CPLFree(pucTemp);
11057 0 : break;
11058 : }
11059 0 : case NC_USHORT:
11060 : {
11061 : unsigned short *pusTemp;
11062 : pusTemp = static_cast<unsigned short *>(
11063 0 : CPLCalloc(nVarLen, sizeof(unsigned short)));
11064 0 : nc_get_vara_ushort(nCdfId, nVarId, start, count, pusTemp);
11065 : char szTemp[256];
11066 0 : size_t m = 0;
11067 0 : for (; m < nVarLen - 1; m++)
11068 : {
11069 0 : CPLsnprintf(szTemp, sizeof(szTemp), "%u,", pusTemp[m]);
11070 0 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11071 : }
11072 0 : CPLsnprintf(szTemp, sizeof(szTemp), "%u", pusTemp[m]);
11073 0 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11074 0 : CPLFree(pusTemp);
11075 0 : break;
11076 : }
11077 0 : case NC_UINT:
11078 : {
11079 : unsigned int *punTemp;
11080 : punTemp = static_cast<unsigned int *>(
11081 0 : CPLCalloc(nVarLen, sizeof(unsigned int)));
11082 0 : nc_get_vara_uint(nCdfId, nVarId, start, count, punTemp);
11083 : char szTemp[256];
11084 0 : size_t m = 0;
11085 0 : for (; m < nVarLen - 1; m++)
11086 : {
11087 0 : CPLsnprintf(szTemp, sizeof(szTemp), "%u,", punTemp[m]);
11088 0 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11089 : }
11090 0 : CPLsnprintf(szTemp, sizeof(szTemp), "%u", punTemp[m]);
11091 0 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11092 0 : CPLFree(punTemp);
11093 0 : break;
11094 : }
11095 1 : case NC_INT64:
11096 : {
11097 : long long *pnTemp =
11098 1 : static_cast<long long *>(CPLCalloc(nVarLen, sizeof(long long)));
11099 1 : nc_get_vara_longlong(nCdfId, nVarId, start, count, pnTemp);
11100 : char szTemp[256];
11101 1 : size_t m = 0;
11102 2 : for (; m < nVarLen - 1; m++)
11103 : {
11104 1 : snprintf(szTemp, sizeof(szTemp), CPL_FRMT_GIB ",", pnTemp[m]);
11105 1 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11106 : }
11107 1 : snprintf(szTemp, sizeof(szTemp), CPL_FRMT_GIB, pnTemp[m]);
11108 1 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11109 1 : CPLFree(pnTemp);
11110 1 : break;
11111 : }
11112 0 : case NC_UINT64:
11113 : {
11114 : unsigned long long *pnTemp = static_cast<unsigned long long *>(
11115 0 : CPLCalloc(nVarLen, sizeof(unsigned long long)));
11116 0 : nc_get_vara_ulonglong(nCdfId, nVarId, start, count, pnTemp);
11117 : char szTemp[256];
11118 0 : size_t m = 0;
11119 0 : for (; m < nVarLen - 1; m++)
11120 : {
11121 0 : snprintf(szTemp, sizeof(szTemp), CPL_FRMT_GUIB ",", pnTemp[m]);
11122 0 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11123 : }
11124 0 : snprintf(szTemp, sizeof(szTemp), CPL_FRMT_GUIB, pnTemp[m]);
11125 0 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11126 0 : CPLFree(pnTemp);
11127 0 : break;
11128 : }
11129 0 : default:
11130 0 : CPLDebug("GDAL_netCDF", "NCDFGetVar1D unsupported type %d",
11131 : nVarType);
11132 0 : CPLFree(pszVarValue);
11133 0 : pszVarValue = nullptr;
11134 0 : break;
11135 : }
11136 :
11137 75 : if (pszVarValue != nullptr && nVarLen > 1 && nVarType != NC_CHAR)
11138 40 : NCDFSafeStrcat(&pszVarValue, "}", &nVarValueSize);
11139 :
11140 : /* set return values */
11141 75 : *pszValue = pszVarValue;
11142 :
11143 75 : return CE_None;
11144 : }
11145 :
11146 8 : static CPLErr NCDFPut1DVar(int nCdfId, int nVarId, const char *pszValue)
11147 : {
11148 8 : if (EQUAL(pszValue, ""))
11149 0 : return CE_Failure;
11150 :
11151 : /* get var information */
11152 8 : int nVarDimId = -1;
11153 8 : int status = nc_inq_varndims(nCdfId, nVarId, &nVarDimId);
11154 8 : if (status != NC_NOERR || nVarDimId != 1)
11155 0 : return CE_Failure;
11156 :
11157 8 : status = nc_inq_vardimid(nCdfId, nVarId, &nVarDimId);
11158 8 : if (status != NC_NOERR)
11159 0 : return CE_Failure;
11160 :
11161 8 : nc_type nVarType = NC_CHAR;
11162 8 : status = nc_inq_vartype(nCdfId, nVarId, &nVarType);
11163 8 : if (status != NC_NOERR)
11164 0 : return CE_Failure;
11165 :
11166 8 : size_t nVarLen = 0;
11167 8 : status = nc_inq_dimlen(nCdfId, nVarDimId, &nVarLen);
11168 8 : if (status != NC_NOERR)
11169 0 : return CE_Failure;
11170 :
11171 8 : size_t start[1] = {0};
11172 8 : size_t count[1] = {nVarLen};
11173 :
11174 : /* get the values as tokens */
11175 8 : char **papszValues = NCDFTokenizeArray(pszValue);
11176 8 : if (papszValues == nullptr)
11177 0 : return CE_Failure;
11178 :
11179 8 : nVarLen = CSLCount(papszValues);
11180 :
11181 : /* now write the data */
11182 8 : if (nVarType == NC_CHAR)
11183 : {
11184 0 : status = nc_put_vara_text(nCdfId, nVarId, start, count, pszValue);
11185 0 : NCDF_ERR(status);
11186 : }
11187 : else
11188 : {
11189 8 : switch (nVarType)
11190 : {
11191 0 : case NC_BYTE:
11192 : {
11193 : signed char *pscTemp = static_cast<signed char *>(
11194 0 : CPLCalloc(nVarLen, sizeof(signed char)));
11195 0 : for (size_t i = 0; i < nVarLen; i++)
11196 : {
11197 0 : char *pszTemp = nullptr;
11198 0 : pscTemp[i] = static_cast<signed char>(
11199 0 : strtol(papszValues[i], &pszTemp, 10));
11200 : }
11201 : status =
11202 0 : nc_put_vara_schar(nCdfId, nVarId, start, count, pscTemp);
11203 0 : NCDF_ERR(status);
11204 0 : CPLFree(pscTemp);
11205 0 : break;
11206 : }
11207 0 : case NC_SHORT:
11208 : {
11209 : short *psTemp =
11210 0 : static_cast<short *>(CPLCalloc(nVarLen, sizeof(short)));
11211 0 : for (size_t i = 0; i < nVarLen; i++)
11212 : {
11213 0 : char *pszTemp = nullptr;
11214 0 : psTemp[i] = static_cast<short>(
11215 0 : strtol(papszValues[i], &pszTemp, 10));
11216 : }
11217 : status =
11218 0 : nc_put_vara_short(nCdfId, nVarId, start, count, psTemp);
11219 0 : NCDF_ERR(status);
11220 0 : CPLFree(psTemp);
11221 0 : break;
11222 : }
11223 3 : case NC_INT:
11224 : {
11225 : int *pnTemp =
11226 3 : static_cast<int *>(CPLCalloc(nVarLen, sizeof(int)));
11227 11 : for (size_t i = 0; i < nVarLen; i++)
11228 : {
11229 8 : char *pszTemp = nullptr;
11230 8 : pnTemp[i] =
11231 8 : static_cast<int>(strtol(papszValues[i], &pszTemp, 10));
11232 : }
11233 3 : status = nc_put_vara_int(nCdfId, nVarId, start, count, pnTemp);
11234 3 : NCDF_ERR(status);
11235 3 : CPLFree(pnTemp);
11236 3 : break;
11237 : }
11238 0 : case NC_FLOAT:
11239 : {
11240 : float *pfTemp =
11241 0 : static_cast<float *>(CPLCalloc(nVarLen, sizeof(float)));
11242 0 : for (size_t i = 0; i < nVarLen; i++)
11243 : {
11244 0 : char *pszTemp = nullptr;
11245 0 : pfTemp[i] =
11246 0 : static_cast<float>(CPLStrtod(papszValues[i], &pszTemp));
11247 : }
11248 : status =
11249 0 : nc_put_vara_float(nCdfId, nVarId, start, count, pfTemp);
11250 0 : NCDF_ERR(status);
11251 0 : CPLFree(pfTemp);
11252 0 : break;
11253 : }
11254 5 : case NC_DOUBLE:
11255 : {
11256 : double *pdfTemp =
11257 5 : static_cast<double *>(CPLCalloc(nVarLen, sizeof(double)));
11258 19 : for (size_t i = 0; i < nVarLen; i++)
11259 : {
11260 14 : char *pszTemp = nullptr;
11261 14 : pdfTemp[i] = CPLStrtod(papszValues[i], &pszTemp);
11262 : }
11263 : status =
11264 5 : nc_put_vara_double(nCdfId, nVarId, start, count, pdfTemp);
11265 5 : NCDF_ERR(status);
11266 5 : CPLFree(pdfTemp);
11267 5 : break;
11268 : }
11269 0 : default:
11270 : {
11271 0 : int nTmpFormat = 0;
11272 0 : status = nc_inq_format(nCdfId, &nTmpFormat);
11273 0 : NCDF_ERR(status);
11274 0 : if (nTmpFormat == NCDF_FORMAT_NC4)
11275 : {
11276 0 : switch (nVarType)
11277 : {
11278 0 : case NC_STRING:
11279 : {
11280 : status =
11281 0 : nc_put_vara_string(nCdfId, nVarId, start, count,
11282 : (const char **)papszValues);
11283 0 : NCDF_ERR(status);
11284 0 : break;
11285 : }
11286 0 : case NC_UBYTE:
11287 : {
11288 : unsigned char *pucTemp =
11289 : static_cast<unsigned char *>(
11290 0 : CPLCalloc(nVarLen, sizeof(unsigned char)));
11291 0 : for (size_t i = 0; i < nVarLen; i++)
11292 : {
11293 0 : char *pszTemp = nullptr;
11294 0 : pucTemp[i] = static_cast<unsigned char>(
11295 0 : strtoul(papszValues[i], &pszTemp, 10));
11296 : }
11297 0 : status = nc_put_vara_uchar(nCdfId, nVarId, start,
11298 : count, pucTemp);
11299 0 : NCDF_ERR(status);
11300 0 : CPLFree(pucTemp);
11301 0 : break;
11302 : }
11303 0 : case NC_USHORT:
11304 : {
11305 : unsigned short *pusTemp =
11306 : static_cast<unsigned short *>(
11307 0 : CPLCalloc(nVarLen, sizeof(unsigned short)));
11308 0 : for (size_t i = 0; i < nVarLen; i++)
11309 : {
11310 0 : char *pszTemp = nullptr;
11311 0 : pusTemp[i] = static_cast<unsigned short>(
11312 0 : strtoul(papszValues[i], &pszTemp, 10));
11313 : }
11314 0 : status = nc_put_vara_ushort(nCdfId, nVarId, start,
11315 : count, pusTemp);
11316 0 : NCDF_ERR(status);
11317 0 : CPLFree(pusTemp);
11318 0 : break;
11319 : }
11320 0 : case NC_UINT:
11321 : {
11322 : unsigned int *punTemp = static_cast<unsigned int *>(
11323 0 : CPLCalloc(nVarLen, sizeof(unsigned int)));
11324 0 : for (size_t i = 0; i < nVarLen; i++)
11325 : {
11326 0 : char *pszTemp = nullptr;
11327 0 : punTemp[i] = static_cast<unsigned int>(
11328 0 : strtoul(papszValues[i], &pszTemp, 10));
11329 : }
11330 0 : status = nc_put_vara_uint(nCdfId, nVarId, start,
11331 : count, punTemp);
11332 0 : NCDF_ERR(status);
11333 0 : CPLFree(punTemp);
11334 0 : break;
11335 : }
11336 0 : default:
11337 0 : if (papszValues)
11338 0 : CSLDestroy(papszValues);
11339 0 : return CE_Failure;
11340 : break;
11341 : }
11342 : }
11343 0 : break;
11344 : }
11345 : }
11346 : }
11347 :
11348 8 : if (papszValues)
11349 8 : CSLDestroy(papszValues);
11350 :
11351 8 : return CE_None;
11352 : }
11353 :
11354 : /************************************************************************/
11355 : /* GetDefaultNoDataValue() */
11356 : /************************************************************************/
11357 :
11358 188 : double NCDFGetDefaultNoDataValue(int nCdfId, int nVarId, int nVarType,
11359 : bool &bGotNoData)
11360 :
11361 : {
11362 188 : int nNoFill = 0;
11363 188 : double dfNoData = 0.0;
11364 :
11365 188 : switch (nVarType)
11366 : {
11367 0 : case NC_CHAR:
11368 : case NC_BYTE:
11369 : case NC_UBYTE:
11370 : // Don't do default fill-values for bytes, too risky.
11371 : // This function should not be called in those cases.
11372 0 : CPLAssert(false);
11373 : break;
11374 24 : case NC_SHORT:
11375 : {
11376 24 : short nFillVal = 0;
11377 24 : if (nc_inq_var_fill(nCdfId, nVarId, &nNoFill, &nFillVal) ==
11378 : NC_NOERR)
11379 : {
11380 24 : if (!nNoFill)
11381 : {
11382 23 : bGotNoData = true;
11383 23 : dfNoData = nFillVal;
11384 : }
11385 : }
11386 : else
11387 0 : dfNoData = NC_FILL_SHORT;
11388 24 : break;
11389 : }
11390 26 : case NC_INT:
11391 : {
11392 26 : int nFillVal = 0;
11393 26 : if (nc_inq_var_fill(nCdfId, nVarId, &nNoFill, &nFillVal) ==
11394 : NC_NOERR)
11395 : {
11396 26 : if (!nNoFill)
11397 : {
11398 25 : bGotNoData = true;
11399 25 : dfNoData = nFillVal;
11400 : }
11401 : }
11402 : else
11403 0 : dfNoData = NC_FILL_INT;
11404 26 : break;
11405 : }
11406 71 : case NC_FLOAT:
11407 : {
11408 71 : float fFillVal = 0;
11409 71 : if (nc_inq_var_fill(nCdfId, nVarId, &nNoFill, &fFillVal) ==
11410 : NC_NOERR)
11411 : {
11412 71 : if (!nNoFill)
11413 : {
11414 67 : bGotNoData = true;
11415 67 : dfNoData = fFillVal;
11416 : }
11417 : }
11418 : else
11419 0 : dfNoData = NC_FILL_FLOAT;
11420 71 : break;
11421 : }
11422 34 : case NC_DOUBLE:
11423 : {
11424 34 : if (nc_inq_var_fill(nCdfId, nVarId, &nNoFill, &dfNoData) ==
11425 : NC_NOERR)
11426 : {
11427 34 : if (!nNoFill)
11428 : {
11429 34 : bGotNoData = true;
11430 : }
11431 : }
11432 : else
11433 0 : dfNoData = NC_FILL_DOUBLE;
11434 34 : break;
11435 : }
11436 7 : case NC_USHORT:
11437 : {
11438 7 : unsigned short nFillVal = 0;
11439 7 : if (nc_inq_var_fill(nCdfId, nVarId, &nNoFill, &nFillVal) ==
11440 : NC_NOERR)
11441 : {
11442 7 : if (!nNoFill)
11443 : {
11444 7 : bGotNoData = true;
11445 7 : dfNoData = nFillVal;
11446 : }
11447 : }
11448 : else
11449 0 : dfNoData = NC_FILL_USHORT;
11450 7 : break;
11451 : }
11452 7 : case NC_UINT:
11453 : {
11454 7 : unsigned int nFillVal = 0;
11455 7 : if (nc_inq_var_fill(nCdfId, nVarId, &nNoFill, &nFillVal) ==
11456 : NC_NOERR)
11457 : {
11458 7 : if (!nNoFill)
11459 : {
11460 7 : bGotNoData = true;
11461 7 : dfNoData = nFillVal;
11462 : }
11463 : }
11464 : else
11465 0 : dfNoData = NC_FILL_UINT;
11466 7 : break;
11467 : }
11468 19 : default:
11469 19 : dfNoData = 0.0;
11470 19 : break;
11471 : }
11472 :
11473 188 : return dfNoData;
11474 : }
11475 :
11476 : /************************************************************************/
11477 : /* NCDFGetDefaultNoDataValueAsInt64() */
11478 : /************************************************************************/
11479 :
11480 2 : int64_t NCDFGetDefaultNoDataValueAsInt64(int nCdfId, int nVarId,
11481 : bool &bGotNoData)
11482 :
11483 : {
11484 2 : int nNoFill = 0;
11485 2 : long long nFillVal = 0;
11486 2 : if (nc_inq_var_fill(nCdfId, nVarId, &nNoFill, &nFillVal) == NC_NOERR)
11487 : {
11488 2 : if (!nNoFill)
11489 : {
11490 2 : bGotNoData = true;
11491 2 : return static_cast<int64_t>(nFillVal);
11492 : }
11493 : }
11494 : else
11495 0 : return static_cast<int64_t>(NC_FILL_INT64);
11496 0 : return 0;
11497 : }
11498 :
11499 : /************************************************************************/
11500 : /* NCDFGetDefaultNoDataValueAsUInt64() */
11501 : /************************************************************************/
11502 :
11503 1 : uint64_t NCDFGetDefaultNoDataValueAsUInt64(int nCdfId, int nVarId,
11504 : bool &bGotNoData)
11505 :
11506 : {
11507 1 : int nNoFill = 0;
11508 1 : unsigned long long nFillVal = 0;
11509 1 : if (nc_inq_var_fill(nCdfId, nVarId, &nNoFill, &nFillVal) == NC_NOERR)
11510 : {
11511 1 : if (!nNoFill)
11512 : {
11513 1 : bGotNoData = true;
11514 1 : return static_cast<uint64_t>(nFillVal);
11515 : }
11516 : }
11517 : else
11518 0 : return static_cast<uint64_t>(NC_FILL_UINT64);
11519 0 : return 0;
11520 : }
11521 :
11522 11027 : static int NCDFDoesVarContainAttribVal(int nCdfId,
11523 : const char *const *papszAttribNames,
11524 : const char *const *papszAttribValues,
11525 : int nVarId, const char *pszVarName,
11526 : bool bStrict = true)
11527 : {
11528 11027 : if (nVarId == -1 && pszVarName != nullptr)
11529 8077 : NCDFResolveVar(nCdfId, pszVarName, &nCdfId, &nVarId);
11530 :
11531 11027 : if (nVarId == -1)
11532 878 : return -1;
11533 :
11534 10149 : bool bFound = false;
11535 47371 : for (int i = 0; !bFound && papszAttribNames != nullptr &&
11536 45127 : papszAttribNames[i] != nullptr;
11537 : i++)
11538 : {
11539 37222 : char *pszTemp = nullptr;
11540 37222 : if (NCDFGetAttr(nCdfId, nVarId, papszAttribNames[i], &pszTemp) ==
11541 53459 : CE_None &&
11542 16237 : pszTemp != nullptr)
11543 : {
11544 16237 : if (bStrict)
11545 : {
11546 16237 : if (EQUAL(pszTemp, papszAttribValues[i]))
11547 2244 : bFound = true;
11548 : }
11549 : else
11550 : {
11551 0 : if (EQUALN(pszTemp, papszAttribValues[i],
11552 : strlen(papszAttribValues[i])))
11553 0 : bFound = true;
11554 : }
11555 16237 : CPLFree(pszTemp);
11556 : }
11557 : }
11558 10149 : return bFound;
11559 : }
11560 :
11561 1952 : static int NCDFDoesVarContainAttribVal2(int nCdfId, const char *papszAttribName,
11562 : const char *const *papszAttribValues,
11563 : int nVarId, const char *pszVarName,
11564 : int bStrict = true)
11565 : {
11566 1952 : if (nVarId == -1 && pszVarName != nullptr)
11567 1569 : NCDFResolveVar(nCdfId, pszVarName, &nCdfId, &nVarId);
11568 :
11569 1952 : if (nVarId == -1)
11570 0 : return -1;
11571 :
11572 1952 : bool bFound = false;
11573 1952 : char *pszTemp = nullptr;
11574 2331 : if (NCDFGetAttr(nCdfId, nVarId, papszAttribName, &pszTemp) != CE_None ||
11575 379 : pszTemp == nullptr)
11576 1573 : return FALSE;
11577 :
11578 7703 : for (int i = 0; !bFound && i < CSLCount(papszAttribValues); i++)
11579 : {
11580 7324 : if (bStrict)
11581 : {
11582 7296 : if (EQUAL(pszTemp, papszAttribValues[i]))
11583 31 : bFound = true;
11584 : }
11585 : else
11586 : {
11587 28 : if (EQUALN(pszTemp, papszAttribValues[i],
11588 : strlen(papszAttribValues[i])))
11589 0 : bFound = true;
11590 : }
11591 : }
11592 :
11593 379 : CPLFree(pszTemp);
11594 :
11595 379 : return bFound;
11596 : }
11597 :
11598 876 : static bool NCDFEqual(const char *papszName, const char *const *papszValues)
11599 : {
11600 876 : if (papszName == nullptr || EQUAL(papszName, ""))
11601 0 : return false;
11602 :
11603 2392 : for (int i = 0; papszValues && papszValues[i]; ++i)
11604 : {
11605 1636 : if (EQUAL(papszName, papszValues[i]))
11606 120 : return true;
11607 : }
11608 :
11609 756 : return false;
11610 : }
11611 :
11612 : // Test that a variable is longitude/latitude coordinate,
11613 : // following CF 4.1 and 4.2.
11614 3759 : bool NCDFIsVarLongitude(int nCdfId, int nVarId, const char *pszVarName)
11615 : {
11616 : // Check for matching attributes.
11617 3759 : int bVal = NCDFDoesVarContainAttribVal(nCdfId, papszCFLongitudeAttribNames,
11618 : papszCFLongitudeAttribValues, nVarId,
11619 : pszVarName);
11620 : // If not found using attributes then check using var name
11621 : // unless GDAL_NETCDF_VERIFY_DIMS=STRICT.
11622 3759 : if (bVal == -1)
11623 : {
11624 280 : if (!EQUAL(CPLGetConfigOption("GDAL_NETCDF_VERIFY_DIMS", "YES"),
11625 : "STRICT"))
11626 280 : bVal = NCDFEqual(pszVarName, papszCFLongitudeVarNames);
11627 : else
11628 0 : bVal = FALSE;
11629 : }
11630 3479 : else if (bVal)
11631 : {
11632 : // Check that the units is not 'm' or '1'. See #6759
11633 784 : char *pszTemp = nullptr;
11634 1161 : if (NCDFGetAttr(nCdfId, nVarId, "units", &pszTemp) == CE_None &&
11635 377 : pszTemp != nullptr)
11636 : {
11637 377 : if (EQUAL(pszTemp, "m") || EQUAL(pszTemp, "1"))
11638 97 : bVal = false;
11639 377 : CPLFree(pszTemp);
11640 : }
11641 : }
11642 :
11643 3759 : return CPL_TO_BOOL(bVal);
11644 : }
11645 :
11646 2155 : bool NCDFIsVarLatitude(int nCdfId, int nVarId, const char *pszVarName)
11647 : {
11648 2155 : int bVal = NCDFDoesVarContainAttribVal(nCdfId, papszCFLatitudeAttribNames,
11649 : papszCFLatitudeAttribValues, nVarId,
11650 : pszVarName);
11651 2155 : if (bVal == -1)
11652 : {
11653 163 : if (!EQUAL(CPLGetConfigOption("GDAL_NETCDF_VERIFY_DIMS", "YES"),
11654 : "STRICT"))
11655 163 : bVal = NCDFEqual(pszVarName, papszCFLatitudeVarNames);
11656 : else
11657 0 : bVal = FALSE;
11658 : }
11659 1992 : else if (bVal)
11660 : {
11661 : // Check that the units is not 'm' or '1'. See #6759
11662 540 : char *pszTemp = nullptr;
11663 681 : if (NCDFGetAttr(nCdfId, nVarId, "units", &pszTemp) == CE_None &&
11664 141 : pszTemp != nullptr)
11665 : {
11666 141 : if (EQUAL(pszTemp, "m") || EQUAL(pszTemp, "1"))
11667 36 : bVal = false;
11668 141 : CPLFree(pszTemp);
11669 : }
11670 : }
11671 :
11672 2155 : return CPL_TO_BOOL(bVal);
11673 : }
11674 :
11675 2280 : bool NCDFIsVarProjectionX(int nCdfId, int nVarId, const char *pszVarName)
11676 : {
11677 2280 : int bVal = NCDFDoesVarContainAttribVal(
11678 : nCdfId, papszCFProjectionXAttribNames, papszCFProjectionXAttribValues,
11679 : nVarId, pszVarName);
11680 2280 : if (bVal == -1)
11681 : {
11682 274 : if (!EQUAL(CPLGetConfigOption("GDAL_NETCDF_VERIFY_DIMS", "YES"),
11683 : "STRICT"))
11684 274 : bVal = NCDFEqual(pszVarName, papszCFProjectionXVarNames);
11685 : else
11686 0 : bVal = FALSE;
11687 : }
11688 2006 : else if (bVal)
11689 : {
11690 : // Check that the units is not '1'
11691 371 : char *pszTemp = nullptr;
11692 529 : if (NCDFGetAttr(nCdfId, nVarId, "units", &pszTemp) == CE_None &&
11693 158 : pszTemp != nullptr)
11694 : {
11695 158 : if (EQUAL(pszTemp, "1"))
11696 5 : bVal = false;
11697 158 : CPLFree(pszTemp);
11698 : }
11699 : }
11700 :
11701 2280 : return CPL_TO_BOOL(bVal);
11702 : }
11703 :
11704 1614 : bool NCDFIsVarProjectionY(int nCdfId, int nVarId, const char *pszVarName)
11705 : {
11706 1614 : int bVal = NCDFDoesVarContainAttribVal(
11707 : nCdfId, papszCFProjectionYAttribNames, papszCFProjectionYAttribValues,
11708 : nVarId, pszVarName);
11709 1614 : if (bVal == -1)
11710 : {
11711 159 : if (!EQUAL(CPLGetConfigOption("GDAL_NETCDF_VERIFY_DIMS", "YES"),
11712 : "STRICT"))
11713 159 : bVal = NCDFEqual(pszVarName, papszCFProjectionYVarNames);
11714 : else
11715 0 : bVal = FALSE;
11716 : }
11717 1455 : else if (bVal)
11718 : {
11719 : // Check that the units is not '1'
11720 370 : char *pszTemp = nullptr;
11721 527 : if (NCDFGetAttr(nCdfId, nVarId, "units", &pszTemp) == CE_None &&
11722 157 : pszTemp != nullptr)
11723 : {
11724 157 : if (EQUAL(pszTemp, "1"))
11725 5 : bVal = false;
11726 157 : CPLFree(pszTemp);
11727 : }
11728 : }
11729 :
11730 1614 : return CPL_TO_BOOL(bVal);
11731 : }
11732 :
11733 : /* test that a variable is a vertical coordinate, following CF 4.3 */
11734 1017 : bool NCDFIsVarVerticalCoord(int nCdfId, int nVarId, const char *pszVarName)
11735 : {
11736 : /* check for matching attributes */
11737 1017 : if (NCDFDoesVarContainAttribVal(nCdfId, papszCFVerticalAttribNames,
11738 : papszCFVerticalAttribValues, nVarId,
11739 1017 : pszVarName))
11740 72 : return true;
11741 : /* check for matching units */
11742 945 : else if (NCDFDoesVarContainAttribVal2(nCdfId, CF_UNITS,
11743 : papszCFVerticalUnitsValues, nVarId,
11744 945 : pszVarName))
11745 31 : return true;
11746 : /* check for matching standard name */
11747 914 : else if (NCDFDoesVarContainAttribVal2(nCdfId, CF_STD_NAME,
11748 : papszCFVerticalStandardNameValues,
11749 914 : nVarId, pszVarName))
11750 0 : return true;
11751 : else
11752 914 : return false;
11753 : }
11754 :
11755 : /* test that a variable is a time coordinate, following CF 4.4 */
11756 202 : bool NCDFIsVarTimeCoord(int nCdfId, int nVarId, const char *pszVarName)
11757 : {
11758 : /* check for matching attributes */
11759 202 : if (NCDFDoesVarContainAttribVal(nCdfId, papszCFTimeAttribNames,
11760 : papszCFTimeAttribValues, nVarId,
11761 202 : pszVarName))
11762 109 : return true;
11763 : /* check for matching units */
11764 93 : else if (NCDFDoesVarContainAttribVal2(nCdfId, CF_UNITS,
11765 : papszCFTimeUnitsValues, nVarId,
11766 93 : pszVarName, false))
11767 0 : return true;
11768 : else
11769 93 : return false;
11770 : }
11771 :
11772 : // Parse a string, and return as a string list.
11773 : // If it an array of the form {a,b}, then tokenize it.
11774 : // Otherwise, return a copy.
11775 187 : static char **NCDFTokenizeArray(const char *pszValue)
11776 : {
11777 187 : if (pszValue == nullptr || EQUAL(pszValue, ""))
11778 52 : return nullptr;
11779 :
11780 135 : char **papszValues = nullptr;
11781 135 : const int nLen = static_cast<int>(strlen(pszValue));
11782 :
11783 135 : if (pszValue[0] == '{' && nLen > 2 && pszValue[nLen - 1] == '}')
11784 : {
11785 41 : char *pszTemp = static_cast<char *>(CPLMalloc((nLen - 2) + 1));
11786 41 : strncpy(pszTemp, pszValue + 1, nLen - 2);
11787 41 : pszTemp[nLen - 2] = '\0';
11788 41 : papszValues = CSLTokenizeString2(pszTemp, ",", CSLT_ALLOWEMPTYTOKENS);
11789 41 : CPLFree(pszTemp);
11790 : }
11791 : else
11792 : {
11793 94 : papszValues = reinterpret_cast<char **>(CPLCalloc(2, sizeof(char *)));
11794 94 : papszValues[0] = CPLStrdup(pszValue);
11795 94 : papszValues[1] = nullptr;
11796 : }
11797 :
11798 135 : return papszValues;
11799 : }
11800 :
11801 : // Open a NetCDF subdataset from full path /group1/group2/.../groupn/var.
11802 : // Leading slash is optional.
11803 408 : static CPLErr NCDFOpenSubDataset(int nCdfId, const char *pszSubdatasetName,
11804 : int *pnGroupId, int *pnVarId)
11805 : {
11806 408 : *pnGroupId = -1;
11807 408 : *pnVarId = -1;
11808 :
11809 : // Open group.
11810 : char *pszGroupFullName =
11811 408 : CPLStrdup(CPLGetPathSafe(pszSubdatasetName).c_str());
11812 : // Add a leading slash if needed.
11813 408 : if (pszGroupFullName[0] != '/')
11814 : {
11815 392 : char *old = pszGroupFullName;
11816 392 : pszGroupFullName = CPLStrdup(CPLSPrintf("/%s", pszGroupFullName));
11817 392 : CPLFree(old);
11818 : }
11819 : // Detect root group.
11820 408 : if (EQUAL(pszGroupFullName, "/"))
11821 : {
11822 392 : *pnGroupId = nCdfId;
11823 392 : CPLFree(pszGroupFullName);
11824 : }
11825 : else
11826 : {
11827 16 : int status = nc_inq_grp_full_ncid(nCdfId, pszGroupFullName, pnGroupId);
11828 16 : CPLFree(pszGroupFullName);
11829 16 : NCDF_ERR_RET(status);
11830 : }
11831 :
11832 : // Open var.
11833 408 : const char *pszVarName = CPLGetFilename(pszSubdatasetName);
11834 408 : NCDF_ERR_RET(nc_inq_varid(*pnGroupId, pszVarName, pnVarId));
11835 :
11836 408 : return CE_None;
11837 : }
11838 :
11839 : // Get all dimensions visible from a given NetCDF (or group) ID and any of
11840 : // its parents.
11841 349 : static CPLErr NCDFGetVisibleDims(int nGroupId, int *pnDims, int **ppanDimIds)
11842 : {
11843 349 : int nDims = 0;
11844 349 : int *panDimIds = nullptr;
11845 349 : NCDF_ERR_RET(nc_inq_dimids(nGroupId, &nDims, nullptr, true));
11846 :
11847 349 : panDimIds = static_cast<int *>(CPLMalloc(nDims * sizeof(int)));
11848 :
11849 349 : int status = nc_inq_dimids(nGroupId, nullptr, panDimIds, true);
11850 349 : if (status != NC_NOERR)
11851 0 : CPLFree(panDimIds);
11852 349 : NCDF_ERR_RET(status);
11853 :
11854 349 : *pnDims = nDims;
11855 349 : *ppanDimIds = panDimIds;
11856 :
11857 349 : return CE_None;
11858 : }
11859 :
11860 : // Get direct sub-groups IDs of a given NetCDF (or group) ID.
11861 : // Consider only direct children, does not get children of children.
11862 3039 : static CPLErr NCDFGetSubGroups(int nGroupId, int *pnSubGroups,
11863 : int **ppanSubGroupIds)
11864 : {
11865 3039 : *pnSubGroups = 0;
11866 3039 : *ppanSubGroupIds = nullptr;
11867 :
11868 : int nSubGroups;
11869 3039 : NCDF_ERR_RET(nc_inq_grps(nGroupId, &nSubGroups, nullptr));
11870 : int *panSubGroupIds =
11871 3039 : static_cast<int *>(CPLMalloc(nSubGroups * sizeof(int)));
11872 3039 : NCDF_ERR_RET(nc_inq_grps(nGroupId, nullptr, panSubGroupIds));
11873 3039 : *pnSubGroups = nSubGroups;
11874 3039 : *ppanSubGroupIds = panSubGroupIds;
11875 :
11876 3039 : return CE_None;
11877 : }
11878 :
11879 : // Get the full name of a given NetCDF (or group) ID
11880 : // (e.g. /group1/group2/.../groupn).
11881 : // bNC3Compat remove the leading slash for top-level variables for
11882 : // backward compatibility (top-level variables are the ones in the root group).
11883 15405 : static CPLErr NCDFGetGroupFullName(int nGroupId, char **ppszFullName,
11884 : bool bNC3Compat)
11885 : {
11886 15405 : *ppszFullName = nullptr;
11887 :
11888 : size_t nFullNameLen;
11889 15405 : NCDF_ERR_RET(nc_inq_grpname_len(nGroupId, &nFullNameLen));
11890 15405 : *ppszFullName =
11891 15405 : static_cast<char *>(CPLMalloc((nFullNameLen + 1) * sizeof(char)));
11892 15405 : int status = nc_inq_grpname_full(nGroupId, &nFullNameLen, *ppszFullName);
11893 15405 : if (status != NC_NOERR)
11894 : {
11895 0 : CPLFree(*ppszFullName);
11896 0 : *ppszFullName = nullptr;
11897 0 : NCDF_ERR_RET(status);
11898 : }
11899 :
11900 15405 : if (bNC3Compat && EQUAL(*ppszFullName, "/"))
11901 7892 : (*ppszFullName)[0] = '\0';
11902 :
11903 15405 : return CE_None;
11904 : }
11905 :
11906 7325 : CPLString NCDFGetGroupFullName(int nGroupId)
11907 : {
11908 7325 : char *pszFullname = nullptr;
11909 7325 : NCDFGetGroupFullName(nGroupId, &pszFullname, false);
11910 7325 : CPLString osRet(pszFullname ? pszFullname : "");
11911 7325 : CPLFree(pszFullname);
11912 14650 : return osRet;
11913 : }
11914 :
11915 : // Get the full name of a given NetCDF variable ID
11916 : // (e.g. /group1/group2/.../groupn/var).
11917 : // Handle also NC_GLOBAL as nVarId.
11918 : // bNC3Compat remove the leading slash for top-level variables for
11919 : // backward compatibility (top-level variables are the ones in the root group).
11920 8031 : static CPLErr NCDFGetVarFullName(int nGroupId, int nVarId, char **ppszFullName,
11921 : bool bNC3Compat)
11922 : {
11923 8031 : *ppszFullName = nullptr;
11924 8031 : char *pszGroupFullName = nullptr;
11925 8031 : ERR_RET(NCDFGetGroupFullName(nGroupId, &pszGroupFullName, bNC3Compat));
11926 : char szVarName[NC_MAX_NAME + 1];
11927 8031 : if (nVarId == NC_GLOBAL)
11928 : {
11929 1084 : strcpy(szVarName, "NC_GLOBAL");
11930 : }
11931 : else
11932 : {
11933 6947 : int status = nc_inq_varname(nGroupId, nVarId, szVarName);
11934 6947 : if (status != NC_NOERR)
11935 : {
11936 0 : CPLFree(pszGroupFullName);
11937 0 : NCDF_ERR_RET(status);
11938 : }
11939 : }
11940 8031 : const char *pszSep = "/";
11941 8031 : if (EQUAL(pszGroupFullName, "/") || EQUAL(pszGroupFullName, ""))
11942 7845 : pszSep = "";
11943 8031 : *ppszFullName =
11944 8031 : CPLStrdup(CPLSPrintf("%s%s%s", pszGroupFullName, pszSep, szVarName));
11945 8031 : CPLFree(pszGroupFullName);
11946 8031 : return CE_None;
11947 : }
11948 :
11949 : // Get the NetCDF root group ID of a given group ID.
11950 0 : static CPLErr NCDFGetRootGroup(int nStartGroupId, int *pnRootGroupId)
11951 : {
11952 0 : *pnRootGroupId = -1;
11953 : // Recurse on parent group.
11954 : int nParentGroupId;
11955 0 : int status = nc_inq_grp_parent(nStartGroupId, &nParentGroupId);
11956 0 : if (status == NC_NOERR)
11957 0 : return NCDFGetRootGroup(nParentGroupId, pnRootGroupId);
11958 0 : else if (status != NC_ENOGRP)
11959 0 : NCDF_ERR_RET(status);
11960 : else // No more parent group.
11961 : {
11962 0 : *pnRootGroupId = nStartGroupId;
11963 : }
11964 :
11965 0 : return CE_None;
11966 : }
11967 :
11968 : // Implementation of NCDFResolveVar/Att.
11969 13121 : static CPLErr NCDFResolveElem(int nStartGroupId, const char *pszVar,
11970 : const char *pszAtt, int *pnGroupId, int *pnId,
11971 : bool bMandatory)
11972 : {
11973 13121 : if (!pszVar && !pszAtt)
11974 : {
11975 0 : CPLError(CE_Failure, CPLE_IllegalArg,
11976 : "pszVar and pszAtt NCDFResolveElem() args are both null.");
11977 0 : return CE_Failure;
11978 : }
11979 :
11980 : enum
11981 : {
11982 : NCRM_PARENT,
11983 : NCRM_WIDTH_WISE
11984 13121 : } eNCResolveMode = NCRM_PARENT;
11985 :
11986 26242 : std::queue<int> aoQueueGroupIdsToVisit;
11987 13121 : aoQueueGroupIdsToVisit.push(nStartGroupId);
11988 :
11989 14788 : while (!aoQueueGroupIdsToVisit.empty())
11990 : {
11991 : // Get the first group of the FIFO queue.
11992 13268 : *pnGroupId = aoQueueGroupIdsToVisit.front();
11993 13268 : aoQueueGroupIdsToVisit.pop();
11994 :
11995 : // Look if this group contains the searched element.
11996 : int status;
11997 13268 : if (pszVar)
11998 13051 : status = nc_inq_varid(*pnGroupId, pszVar, pnId);
11999 : else // pszAtt != nullptr.
12000 217 : status = nc_inq_attid(*pnGroupId, NC_GLOBAL, pszAtt, pnId);
12001 :
12002 13268 : if (status == NC_NOERR)
12003 : {
12004 11601 : return CE_None;
12005 : }
12006 1667 : else if ((pszVar && status != NC_ENOTVAR) ||
12007 214 : (pszAtt && status != NC_ENOTATT))
12008 : {
12009 0 : NCDF_ERR(status);
12010 : }
12011 : // Element not found, in NC4 case we must search in other groups
12012 : // following the CF logic.
12013 :
12014 : // The first resolve mode consists to search on parent groups.
12015 1667 : if (eNCResolveMode == NCRM_PARENT)
12016 : {
12017 1567 : int nParentGroupId = -1;
12018 1567 : int status2 = nc_inq_grp_parent(*pnGroupId, &nParentGroupId);
12019 1567 : if (status2 == NC_NOERR)
12020 45 : aoQueueGroupIdsToVisit.push(nParentGroupId);
12021 1522 : else if (status2 != NC_ENOGRP)
12022 0 : NCDF_ERR(status2);
12023 1522 : else if (pszVar)
12024 : // When resolving a variable, if there is no more
12025 : // parent group then we switch to width-wise search mode
12026 : // starting from the latest found parent group.
12027 1311 : eNCResolveMode = NCRM_WIDTH_WISE;
12028 : }
12029 :
12030 : // The second resolve mode is a width-wise search.
12031 1667 : if (eNCResolveMode == NCRM_WIDTH_WISE)
12032 : {
12033 : // Enqueue all direct sub-groups.
12034 1411 : int nSubGroups = 0;
12035 1411 : int *panSubGroupIds = nullptr;
12036 1411 : NCDFGetSubGroups(*pnGroupId, &nSubGroups, &panSubGroupIds);
12037 1513 : for (int i = 0; i < nSubGroups; i++)
12038 102 : aoQueueGroupIdsToVisit.push(panSubGroupIds[i]);
12039 1411 : CPLFree(panSubGroupIds);
12040 : }
12041 : }
12042 :
12043 1520 : if (bMandatory)
12044 : {
12045 0 : char *pszStartGroupFullName = nullptr;
12046 0 : NCDFGetGroupFullName(nStartGroupId, &pszStartGroupFullName);
12047 0 : CPLError(CE_Failure, CPLE_AppDefined,
12048 : "Cannot resolve mandatory %s %s from group %s",
12049 : (pszVar ? pszVar : pszAtt),
12050 : (pszVar ? "variable" : "attribute"),
12051 0 : (pszStartGroupFullName ? pszStartGroupFullName : ""));
12052 0 : CPLFree(pszStartGroupFullName);
12053 : }
12054 :
12055 1520 : *pnGroupId = -1;
12056 1520 : *pnId = -1;
12057 1520 : return CE_Failure;
12058 : }
12059 :
12060 : // Resolve a variable name from a given starting group following the CF logic:
12061 : // - if var name is an absolute path then directly open it
12062 : // - first search in the starting group and its parent groups
12063 : // - then if there is no more parent group we switch to a width-wise search
12064 : // mode starting from the latest found parent group.
12065 : // The full CF logic is described here:
12066 : // https://github.com/diwg/cf2/blob/master/group/cf2-group.adoc#scope
12067 : // If bMandatory then print an error if resolving fails.
12068 : // TODO: implement support of relative paths.
12069 : // TODO: to follow strictly the CF logic, when searching for a coordinate
12070 : // variable, we must stop the parent search mode once the corresponding
12071 : // dimension is found and start the width-wise search from this group.
12072 : // TODO: to follow strictly the CF logic, when searching in width-wise mode
12073 : // we should skip every groups already visited during the parent
12074 : // search mode (but revisiting them should have no impact so we could
12075 : // let as it is if it is simpler...)
12076 : // TODO: CF specifies that the width-wise search order is "left-to-right" so
12077 : // maybe we must sort sibling groups alphabetically? but maybe not
12078 : // necessary if nc_inq_grps() already sort them?
12079 12907 : CPLErr NCDFResolveVar(int nStartGroupId, const char *pszVar, int *pnGroupId,
12080 : int *pnVarId, bool bMandatory)
12081 : {
12082 12907 : *pnGroupId = -1;
12083 12907 : *pnVarId = -1;
12084 12907 : int nGroupId = nStartGroupId, nVarId;
12085 12907 : if (pszVar[0] == '/')
12086 : {
12087 : // This is an absolute path: we can open the var directly.
12088 : int nRootGroupId;
12089 0 : ERR_RET(NCDFGetRootGroup(nStartGroupId, &nRootGroupId));
12090 0 : ERR_RET(NCDFOpenSubDataset(nRootGroupId, pszVar, &nGroupId, &nVarId));
12091 : }
12092 : else
12093 : {
12094 : // We have to search the variable following the CF logic.
12095 12907 : ERR_RET(NCDFResolveElem(nStartGroupId, pszVar, nullptr, &nGroupId,
12096 : &nVarId, bMandatory));
12097 : }
12098 11598 : *pnGroupId = nGroupId;
12099 11598 : *pnVarId = nVarId;
12100 11598 : return CE_None;
12101 : }
12102 :
12103 : // Like NCDFResolveVar but returns directly the var full name.
12104 1380 : static CPLErr NCDFResolveVarFullName(int nStartGroupId, const char *pszVar,
12105 : char **ppszFullName, bool bMandatory)
12106 : {
12107 1380 : *ppszFullName = nullptr;
12108 : int nGroupId, nVarId;
12109 1380 : ERR_RET(
12110 : NCDFResolveVar(nStartGroupId, pszVar, &nGroupId, &nVarId, bMandatory));
12111 1354 : return NCDFGetVarFullName(nGroupId, nVarId, ppszFullName);
12112 : }
12113 :
12114 : // Like NCDFResolveVar but resolves an attribute instead a variable and
12115 : // returns its integer value.
12116 : // Only GLOBAL attributes are supported for the moment.
12117 214 : static CPLErr NCDFResolveAttInt(int nStartGroupId, int nStartVarId,
12118 : const char *pszAtt, int *pnAtt, bool bMandatory)
12119 : {
12120 214 : int nGroupId = nStartGroupId, nAttId = nStartVarId;
12121 214 : ERR_RET(NCDFResolveElem(nStartGroupId, nullptr, pszAtt, &nGroupId, &nAttId,
12122 : bMandatory));
12123 3 : NCDF_ERR_RET(nc_get_att_int(nGroupId, NC_GLOBAL, pszAtt, pnAtt));
12124 3 : return CE_None;
12125 : }
12126 :
12127 : // Filter variables to keep only valid 2+D raster bands and vector fields in
12128 : // a given a NetCDF (or group) ID and its sub-groups.
12129 : // Coordinate or boundary variables are ignored.
12130 : // It also creates corresponding vector layers.
12131 521 : CPLErr netCDFDataset::FilterVars(
12132 : int nCdfId, bool bKeepRasters, bool bKeepVectors, char **papszIgnoreVars,
12133 : int *pnRasterVars, int *pnGroupId, int *pnVarId, int *pnIgnoredVars,
12134 : std::map<std::array<int, 3>, std::vector<std::pair<int, int>>>
12135 : &oMap2DDimsToGroupAndVar)
12136 : {
12137 521 : int nVars = 0;
12138 521 : int nRasterVars = 0;
12139 521 : NCDF_ERR(nc_inq(nCdfId, nullptr, &nVars, nullptr, nullptr));
12140 :
12141 1042 : std::vector<int> anPotentialVectorVarID;
12142 : // oMapDimIdToCount[x] = number of times dim x is the first dimension of
12143 : // potential vector variables
12144 1042 : std::map<int, int> oMapDimIdToCount;
12145 521 : int nVarXId = -1;
12146 521 : int nVarYId = -1;
12147 521 : int nVarZId = -1;
12148 521 : int nVarTimeId = -1;
12149 521 : int nVarTimeDimId = -1;
12150 521 : bool bIsVectorOnly = true;
12151 521 : int nProfileDimId = -1;
12152 521 : int nParentIndexVarID = -1;
12153 :
12154 3177 : for (int v = 0; v < nVars; v++)
12155 : {
12156 : int nVarDims;
12157 2656 : NCDF_ERR_RET(nc_inq_varndims(nCdfId, v, &nVarDims));
12158 : // Should we ignore this variable?
12159 : char szTemp[NC_MAX_NAME + 1];
12160 2656 : szTemp[0] = '\0';
12161 2656 : NCDF_ERR_RET(nc_inq_varname(nCdfId, v, szTemp));
12162 :
12163 2656 : if (strstr(szTemp, "_node_coordinates") ||
12164 2656 : strstr(szTemp, "_node_count"))
12165 : {
12166 : // Ignore CF-1.8 Simple Geometries helper variables
12167 69 : continue;
12168 : }
12169 :
12170 3875 : if (nVarDims == 1 && (NCDFIsVarLongitude(nCdfId, -1, szTemp) ||
12171 1288 : NCDFIsVarProjectionX(nCdfId, -1, szTemp)))
12172 : {
12173 356 : nVarXId = v;
12174 : }
12175 3163 : else if (nVarDims == 1 && (NCDFIsVarLatitude(nCdfId, -1, szTemp) ||
12176 932 : NCDFIsVarProjectionY(nCdfId, -1, szTemp)))
12177 : {
12178 356 : nVarYId = v;
12179 : }
12180 1875 : else if (nVarDims == 1 && NCDFIsVarVerticalCoord(nCdfId, -1, szTemp))
12181 : {
12182 78 : nVarZId = v;
12183 : }
12184 : else
12185 : {
12186 1797 : char *pszVarFullName = nullptr;
12187 1797 : CPLErr eErr = NCDFGetVarFullName(nCdfId, v, &pszVarFullName);
12188 1797 : if (eErr != CE_None)
12189 : {
12190 0 : CPLFree(pszVarFullName);
12191 0 : continue;
12192 : }
12193 : bool bIgnoreVar =
12194 1797 : (CSLFindString(papszIgnoreVars, pszVarFullName) != -1);
12195 1797 : CPLFree(pszVarFullName);
12196 1797 : if (bIgnoreVar)
12197 : {
12198 102 : if (nVarDims == 1 && NCDFIsVarTimeCoord(nCdfId, -1, szTemp))
12199 : {
12200 11 : nVarTimeId = v;
12201 11 : nc_inq_vardimid(nCdfId, v, &nVarTimeDimId);
12202 : }
12203 91 : else if (nVarDims > 1)
12204 : {
12205 87 : (*pnIgnoredVars)++;
12206 87 : CPLDebug("GDAL_netCDF", "variable #%d [%s] was ignored", v,
12207 : szTemp);
12208 : }
12209 : }
12210 : // Only accept 2+D vars.
12211 1695 : else if (nVarDims >= 2)
12212 : {
12213 678 : bool bRasterCandidate = true;
12214 : // Identify variables that might be vector variables
12215 678 : if (nVarDims == 2)
12216 : {
12217 607 : int anDimIds[2] = {-1, -1};
12218 607 : nc_inq_vardimid(nCdfId, v, anDimIds);
12219 :
12220 607 : nc_type vartype = NC_NAT;
12221 607 : nc_inq_vartype(nCdfId, v, &vartype);
12222 :
12223 : char szDimNameFirst[NC_MAX_NAME + 1];
12224 : char szDimNameSecond[NC_MAX_NAME + 1];
12225 607 : szDimNameFirst[0] = '\0';
12226 607 : szDimNameSecond[0] = '\0';
12227 1370 : if (vartype == NC_CHAR &&
12228 156 : nc_inq_dimname(nCdfId, anDimIds[0], szDimNameFirst) ==
12229 156 : NC_NOERR &&
12230 156 : nc_inq_dimname(nCdfId, anDimIds[1], szDimNameSecond) ==
12231 156 : NC_NOERR &&
12232 156 : !NCDFIsVarLongitude(nCdfId, -1, szDimNameSecond) &&
12233 156 : !NCDFIsVarProjectionX(nCdfId, -1, szDimNameSecond) &&
12234 919 : !NCDFIsVarLatitude(nCdfId, -1, szDimNameFirst) &&
12235 156 : !NCDFIsVarProjectionY(nCdfId, -1, szDimNameFirst))
12236 : {
12237 156 : anPotentialVectorVarID.push_back(v);
12238 156 : oMapDimIdToCount[anDimIds[0]]++;
12239 156 : if (strstr(szDimNameSecond, "_max_width"))
12240 : {
12241 127 : bRasterCandidate = false;
12242 : }
12243 : else
12244 : {
12245 29 : std::array<int, 3> oKey{anDimIds[0], anDimIds[1],
12246 29 : vartype};
12247 29 : oMap2DDimsToGroupAndVar[oKey].emplace_back(
12248 29 : std::pair(nCdfId, v));
12249 : }
12250 : }
12251 : else
12252 : {
12253 451 : std::array<int, 3> oKey{anDimIds[0], anDimIds[1],
12254 451 : vartype};
12255 451 : oMap2DDimsToGroupAndVar[oKey].emplace_back(
12256 451 : std::pair(nCdfId, v));
12257 451 : bIsVectorOnly = false;
12258 : }
12259 : }
12260 : else
12261 : {
12262 71 : bIsVectorOnly = false;
12263 : }
12264 678 : if (bKeepRasters && bRasterCandidate)
12265 : {
12266 522 : *pnGroupId = nCdfId;
12267 522 : *pnVarId = v;
12268 522 : nRasterVars++;
12269 : }
12270 : }
12271 1017 : else if (nVarDims == 1)
12272 : {
12273 725 : nc_type atttype = NC_NAT;
12274 725 : size_t attlen = 0;
12275 725 : if (nc_inq_att(nCdfId, v, "instance_dimension", &atttype,
12276 14 : &attlen) == NC_NOERR &&
12277 725 : atttype == NC_CHAR && attlen < NC_MAX_NAME)
12278 : {
12279 : char szInstanceDimension[NC_MAX_NAME + 1];
12280 14 : if (nc_get_att_text(nCdfId, v, "instance_dimension",
12281 14 : szInstanceDimension) == NC_NOERR)
12282 : {
12283 14 : szInstanceDimension[attlen] = 0;
12284 14 : int status = nc_inq_dimid(nCdfId, szInstanceDimension,
12285 : &nProfileDimId);
12286 14 : if (status == NC_NOERR)
12287 14 : nParentIndexVarID = v;
12288 : else
12289 0 : nProfileDimId = -1;
12290 14 : if (status == NC_EBADDIM)
12291 0 : CPLError(CE_Warning, CPLE_AppDefined,
12292 : "Attribute instance_dimension='%s' refers "
12293 : "to a non existing dimension",
12294 : szInstanceDimension);
12295 : else
12296 14 : NCDF_ERR(status);
12297 : }
12298 : }
12299 725 : if (v != nParentIndexVarID)
12300 : {
12301 711 : anPotentialVectorVarID.push_back(v);
12302 711 : int nDimId = -1;
12303 711 : nc_inq_vardimid(nCdfId, v, &nDimId);
12304 711 : oMapDimIdToCount[nDimId]++;
12305 : }
12306 : }
12307 : }
12308 : }
12309 :
12310 : // If we are opened in raster-only mode and that there are only 1D or 2D
12311 : // variables and that the 2D variables have no X/Y dim, and all
12312 : // variables refer to the same main dimension (or 2 dimensions for
12313 : // featureType=profile), then it is a pure vector dataset
12314 : CPLString osFeatureType(
12315 521 : CSLFetchNameValueDef(papszMetadata, "NC_GLOBAL#featureType", ""));
12316 410 : if (bKeepRasters && !bKeepVectors && bIsVectorOnly && nRasterVars > 0 &&
12317 931 : !anPotentialVectorVarID.empty() &&
12318 0 : (oMapDimIdToCount.size() == 1 ||
12319 0 : (EQUAL(osFeatureType, "profile") && oMapDimIdToCount.size() == 2 &&
12320 0 : nProfileDimId >= 0)))
12321 : {
12322 0 : anPotentialVectorVarID.resize(0);
12323 : }
12324 : else
12325 : {
12326 521 : *pnRasterVars += nRasterVars;
12327 : }
12328 :
12329 521 : if (!anPotentialVectorVarID.empty() && bKeepVectors)
12330 : {
12331 : // Take the dimension that is referenced the most times.
12332 64 : if (!(oMapDimIdToCount.size() == 1 ||
12333 27 : (EQUAL(osFeatureType, "profile") &&
12334 26 : oMapDimIdToCount.size() == 2 && nProfileDimId >= 0)))
12335 : {
12336 1 : CPLError(CE_Warning, CPLE_AppDefined,
12337 : "The dataset has several variables that could be "
12338 : "identified as vector fields, but not all share the same "
12339 : "primary dimension. Consequently they will be ignored.");
12340 : }
12341 : else
12342 : {
12343 50 : if (nVarTimeId >= 0 &&
12344 50 : oMapDimIdToCount.find(nVarTimeDimId) != oMapDimIdToCount.end())
12345 : {
12346 1 : anPotentialVectorVarID.push_back(nVarTimeId);
12347 : }
12348 49 : CreateGrpVectorLayers(nCdfId, osFeatureType, anPotentialVectorVarID,
12349 : oMapDimIdToCount, nVarXId, nVarYId, nVarZId,
12350 : nProfileDimId, nParentIndexVarID,
12351 : bKeepRasters);
12352 : }
12353 : }
12354 :
12355 : // Recurse on sub-groups.
12356 521 : int nSubGroups = 0;
12357 521 : int *panSubGroupIds = nullptr;
12358 521 : NCDFGetSubGroups(nCdfId, &nSubGroups, &panSubGroupIds);
12359 553 : for (int i = 0; i < nSubGroups; i++)
12360 : {
12361 32 : FilterVars(panSubGroupIds[i], bKeepRasters, bKeepVectors,
12362 : papszIgnoreVars, pnRasterVars, pnGroupId, pnVarId,
12363 : pnIgnoredVars, oMap2DDimsToGroupAndVar);
12364 : }
12365 521 : CPLFree(panSubGroupIds);
12366 :
12367 521 : return CE_None;
12368 : }
12369 :
12370 : // Create vector layers from given potentially identified vector variables
12371 : // resulting from the scanning of a NetCDF (or group) ID.
12372 49 : CPLErr netCDFDataset::CreateGrpVectorLayers(
12373 : int nCdfId, const CPLString &osFeatureType,
12374 : const std::vector<int> &anPotentialVectorVarID,
12375 : const std::map<int, int> &oMapDimIdToCount, int nVarXId, int nVarYId,
12376 : int nVarZId, int nProfileDimId, int nParentIndexVarID, bool bKeepRasters)
12377 : {
12378 49 : char *pszGroupName = nullptr;
12379 49 : NCDFGetGroupFullName(nCdfId, &pszGroupName);
12380 49 : if (pszGroupName == nullptr || pszGroupName[0] == '\0')
12381 : {
12382 47 : CPLFree(pszGroupName);
12383 47 : pszGroupName = CPLStrdup(CPLGetBasenameSafe(osFilename).c_str());
12384 : }
12385 49 : OGRwkbGeometryType eGType = wkbUnknown;
12386 : CPLString osLayerName = CSLFetchNameValueDef(
12387 98 : papszMetadata, "NC_GLOBAL#ogr_layer_name", pszGroupName);
12388 49 : CPLFree(pszGroupName);
12389 49 : papszMetadata =
12390 49 : CSLSetNameValue(papszMetadata, "NC_GLOBAL#ogr_layer_name", nullptr);
12391 :
12392 49 : if (EQUAL(osFeatureType, "point") || EQUAL(osFeatureType, "profile"))
12393 : {
12394 33 : papszMetadata =
12395 33 : CSLSetNameValue(papszMetadata, "NC_GLOBAL#featureType", nullptr);
12396 33 : eGType = wkbPoint;
12397 : }
12398 :
12399 : const char *pszLayerType =
12400 49 : CSLFetchNameValue(papszMetadata, "NC_GLOBAL#ogr_layer_type");
12401 49 : if (pszLayerType != nullptr)
12402 : {
12403 9 : eGType = OGRFromOGCGeomType(pszLayerType);
12404 9 : papszMetadata =
12405 9 : CSLSetNameValue(papszMetadata, "NC_GLOBAL#ogr_layer_type", nullptr);
12406 : }
12407 :
12408 : CPLString osGeometryField =
12409 98 : CSLFetchNameValueDef(papszMetadata, "NC_GLOBAL#ogr_geometry_field", "");
12410 49 : papszMetadata =
12411 49 : CSLSetNameValue(papszMetadata, "NC_GLOBAL#ogr_geometry_field", nullptr);
12412 :
12413 49 : int nFirstVarId = -1;
12414 49 : int nVectorDim = oMapDimIdToCount.rbegin()->first;
12415 49 : if (EQUAL(osFeatureType, "profile") && oMapDimIdToCount.size() == 2)
12416 : {
12417 13 : if (nVectorDim == nProfileDimId)
12418 0 : nVectorDim = oMapDimIdToCount.begin()->first;
12419 : }
12420 : else
12421 : {
12422 36 : nProfileDimId = -1;
12423 : }
12424 62 : for (size_t j = 0; j < anPotentialVectorVarID.size(); j++)
12425 : {
12426 62 : int anDimIds[2] = {-1, -1};
12427 62 : nc_inq_vardimid(nCdfId, anPotentialVectorVarID[j], anDimIds);
12428 62 : if (nVectorDim == anDimIds[0])
12429 : {
12430 49 : nFirstVarId = anPotentialVectorVarID[j];
12431 49 : break;
12432 : }
12433 : }
12434 :
12435 : // In case where coordinates are explicitly specified for one of the
12436 : // field/variable, use them in priority over the ones that might have been
12437 : // identified above.
12438 49 : char *pszCoordinates = nullptr;
12439 49 : if (NCDFGetAttr(nCdfId, nFirstVarId, "coordinates", &pszCoordinates) ==
12440 : CE_None)
12441 : {
12442 34 : char **papszTokens = NCDFTokenizeCoordinatesAttribute(pszCFCoordinates);
12443 34 : for (int i = 0; papszTokens != nullptr && papszTokens[i] != nullptr;
12444 : i++)
12445 : {
12446 0 : if (NCDFIsVarLongitude(nCdfId, -1, papszTokens[i]) ||
12447 0 : NCDFIsVarProjectionX(nCdfId, -1, papszTokens[i]))
12448 : {
12449 0 : nVarXId = -1;
12450 0 : CPL_IGNORE_RET_VAL(
12451 0 : nc_inq_varid(nCdfId, papszTokens[i], &nVarXId));
12452 : }
12453 0 : else if (NCDFIsVarLatitude(nCdfId, -1, papszTokens[i]) ||
12454 0 : NCDFIsVarProjectionY(nCdfId, -1, papszTokens[i]))
12455 : {
12456 0 : nVarYId = -1;
12457 0 : CPL_IGNORE_RET_VAL(
12458 0 : nc_inq_varid(nCdfId, papszTokens[i], &nVarYId));
12459 : }
12460 0 : else if (NCDFIsVarVerticalCoord(nCdfId, -1, papszTokens[i]))
12461 : {
12462 0 : nVarZId = -1;
12463 0 : CPL_IGNORE_RET_VAL(
12464 0 : nc_inq_varid(nCdfId, papszTokens[i], &nVarZId));
12465 : }
12466 : }
12467 34 : CSLDestroy(papszTokens);
12468 : }
12469 49 : CPLFree(pszCoordinates);
12470 :
12471 : // Check that the X,Y,Z vars share 1D and share the same dimension as
12472 : // attribute variables.
12473 49 : if (nVarXId >= 0 && nVarYId >= 0)
12474 : {
12475 38 : int nVarDimCount = -1;
12476 38 : int nVarDimId = -1;
12477 38 : if (nc_inq_varndims(nCdfId, nVarXId, &nVarDimCount) != NC_NOERR ||
12478 38 : nVarDimCount != 1 ||
12479 38 : nc_inq_vardimid(nCdfId, nVarXId, &nVarDimId) != NC_NOERR ||
12480 38 : nVarDimId != ((nProfileDimId >= 0) ? nProfileDimId : nVectorDim) ||
12481 35 : nc_inq_varndims(nCdfId, nVarYId, &nVarDimCount) != NC_NOERR ||
12482 35 : nVarDimCount != 1 ||
12483 111 : nc_inq_vardimid(nCdfId, nVarYId, &nVarDimId) != NC_NOERR ||
12484 35 : nVarDimId != ((nProfileDimId >= 0) ? nProfileDimId : nVectorDim))
12485 : {
12486 3 : nVarXId = nVarYId = -1;
12487 : }
12488 69 : else if (nVarZId >= 0 &&
12489 34 : (nc_inq_varndims(nCdfId, nVarZId, &nVarDimCount) != NC_NOERR ||
12490 34 : nVarDimCount != 1 ||
12491 34 : nc_inq_vardimid(nCdfId, nVarZId, &nVarDimId) != NC_NOERR ||
12492 34 : nVarDimId != nVectorDim))
12493 : {
12494 0 : nVarZId = -1;
12495 : }
12496 : }
12497 :
12498 49 : if (eGType == wkbUnknown && nVarXId >= 0 && nVarYId >= 0)
12499 : {
12500 2 : eGType = wkbPoint;
12501 : }
12502 49 : if (eGType == wkbPoint && nVarXId >= 0 && nVarYId >= 0 && nVarZId >= 0)
12503 : {
12504 34 : eGType = wkbPoint25D;
12505 : }
12506 49 : if (eGType == wkbUnknown && osGeometryField.empty())
12507 : {
12508 5 : eGType = wkbNone;
12509 : }
12510 :
12511 : // Read projection info
12512 49 : char **papszMetadataBackup = CSLDuplicate(papszMetadata);
12513 49 : ReadAttributes(nCdfId, nFirstVarId);
12514 49 : if (!this->bSGSupport)
12515 49 : SetProjectionFromVar(nCdfId, nFirstVarId, true);
12516 49 : const char *pszValue = FetchAttr(nCdfId, nFirstVarId, CF_GRD_MAPPING);
12517 49 : char *pszGridMapping = (pszValue ? CPLStrdup(pszValue) : nullptr);
12518 49 : CSLDestroy(papszMetadata);
12519 49 : papszMetadata = papszMetadataBackup;
12520 :
12521 49 : OGRSpatialReference *poSRS = nullptr;
12522 49 : if (!m_oSRS.IsEmpty())
12523 : {
12524 21 : poSRS = m_oSRS.Clone();
12525 : }
12526 : // Reset if there's a 2D raster
12527 49 : m_bHasProjection = false;
12528 49 : m_bHasGeoTransform = false;
12529 :
12530 49 : if (!bKeepRasters)
12531 : {
12532 : // Strip out uninteresting metadata.
12533 45 : papszMetadata =
12534 45 : CSLSetNameValue(papszMetadata, "NC_GLOBAL#Conventions", nullptr);
12535 45 : papszMetadata =
12536 45 : CSLSetNameValue(papszMetadata, "NC_GLOBAL#GDAL", nullptr);
12537 45 : papszMetadata =
12538 45 : CSLSetNameValue(papszMetadata, "NC_GLOBAL#history", nullptr);
12539 : }
12540 :
12541 : std::shared_ptr<netCDFLayer> poLayer(
12542 49 : new netCDFLayer(this, nCdfId, osLayerName, eGType, poSRS));
12543 49 : if (poSRS != nullptr)
12544 21 : poSRS->Release();
12545 49 : poLayer->SetRecordDimID(nVectorDim);
12546 49 : if (wkbFlatten(eGType) == wkbPoint && nVarXId >= 0 && nVarYId >= 0)
12547 : {
12548 35 : poLayer->SetXYZVars(nVarXId, nVarYId, nVarZId);
12549 : }
12550 14 : else if (!osGeometryField.empty())
12551 : {
12552 9 : poLayer->SetWKTGeometryField(osGeometryField);
12553 : }
12554 49 : if (pszGridMapping != nullptr)
12555 : {
12556 21 : poLayer->SetGridMapping(pszGridMapping);
12557 21 : CPLFree(pszGridMapping);
12558 : }
12559 49 : poLayer->SetProfile(nProfileDimId, nParentIndexVarID);
12560 :
12561 574 : for (size_t j = 0; j < anPotentialVectorVarID.size(); j++)
12562 : {
12563 525 : int anDimIds[2] = {-1, -1};
12564 525 : nc_inq_vardimid(nCdfId, anPotentialVectorVarID[j], anDimIds);
12565 525 : if (anDimIds[0] == nVectorDim ||
12566 24 : (nProfileDimId >= 0 && anDimIds[0] == nProfileDimId))
12567 : {
12568 : #ifdef NCDF_DEBUG
12569 : char szTemp2[NC_MAX_NAME + 1] = {};
12570 : CPL_IGNORE_RET_VAL(
12571 : nc_inq_varname(nCdfId, anPotentialVectorVarID[j], szTemp2));
12572 : CPLDebug("GDAL_netCDF", "Variable %s is a vector field", szTemp2);
12573 : #endif
12574 525 : poLayer->AddField(anPotentialVectorVarID[j]);
12575 : }
12576 : }
12577 :
12578 49 : if (poLayer->GetLayerDefn()->GetFieldCount() != 0 ||
12579 0 : poLayer->GetGeomType() != wkbNone)
12580 : {
12581 49 : papoLayers.push_back(poLayer);
12582 : }
12583 :
12584 98 : return CE_None;
12585 : }
12586 :
12587 : // Get all coordinate and boundary variables full names referenced in
12588 : // a given a NetCDF (or group) ID and its sub-groups.
12589 : // These variables are identified in other variable's
12590 : // "coordinates" and "bounds" attribute.
12591 : // Searching coordinate and boundary variables may need to explore
12592 : // parents groups (or other groups in case of reference given in form of an
12593 : // absolute path).
12594 : // See CF sections 5.2, 5.6 and 7.1
12595 522 : static CPLErr NCDFGetCoordAndBoundVarFullNames(int nCdfId, char ***ppapszVars)
12596 : {
12597 522 : int nVars = 0;
12598 522 : NCDF_ERR(nc_inq(nCdfId, nullptr, &nVars, nullptr, nullptr));
12599 :
12600 3192 : for (int v = 0; v < nVars; v++)
12601 : {
12602 2670 : char *pszTemp = nullptr;
12603 2670 : char **papszTokens = nullptr;
12604 2670 : if (NCDFGetAttr(nCdfId, v, "coordinates", &pszTemp) == CE_None)
12605 445 : papszTokens = NCDFTokenizeCoordinatesAttribute(pszTemp);
12606 2670 : CPLFree(pszTemp);
12607 2670 : pszTemp = nullptr;
12608 2670 : if (NCDFGetAttr(nCdfId, v, "bounds", &pszTemp) == CE_None &&
12609 2670 : pszTemp != nullptr && !EQUAL(pszTemp, ""))
12610 17 : papszTokens = CSLAddString(papszTokens, pszTemp);
12611 2670 : CPLFree(pszTemp);
12612 3956 : for (int i = 0; papszTokens != nullptr && papszTokens[i] != nullptr;
12613 : i++)
12614 : {
12615 1286 : char *pszVarFullName = nullptr;
12616 1286 : if (NCDFResolveVarFullName(nCdfId, papszTokens[i],
12617 1286 : &pszVarFullName) == CE_None)
12618 1260 : *ppapszVars = CSLAddString(*ppapszVars, pszVarFullName);
12619 1286 : CPLFree(pszVarFullName);
12620 : }
12621 2670 : CSLDestroy(papszTokens);
12622 : }
12623 :
12624 : // Recurse on sub-groups.
12625 : int nSubGroups;
12626 522 : int *panSubGroupIds = nullptr;
12627 522 : NCDFGetSubGroups(nCdfId, &nSubGroups, &panSubGroupIds);
12628 554 : for (int i = 0; i < nSubGroups; i++)
12629 : {
12630 32 : NCDFGetCoordAndBoundVarFullNames(panSubGroupIds[i], ppapszVars);
12631 : }
12632 522 : CPLFree(panSubGroupIds);
12633 :
12634 522 : return CE_None;
12635 : }
12636 :
12637 : // Check if give type is user defined
12638 918 : bool NCDFIsUserDefinedType(int /*ncid*/, int type)
12639 : {
12640 918 : return type >= NC_FIRSTUSERTYPEID;
12641 : }
12642 :
12643 558 : char **NCDFTokenizeCoordinatesAttribute(const char *pszCoordinates)
12644 : {
12645 : // CF conventions use space as the separator for variable names in the
12646 : // coordinates attribute, but some products such as
12647 : // https://sentinel.esa.int/web/sentinel/technical-guides/sentinel-3-synergy/products-algorithms/level-2-aod-algorithms-and-products/level-2-aod-products-description
12648 : // use comma.
12649 558 : return CSLTokenizeString2(pszCoordinates, ", ", 0);
12650 : }
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