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 <mutex>
33 : #include <set>
34 : #include <queue>
35 : #include <string>
36 : #include <tuple>
37 : #include <utility>
38 : #include <vector>
39 :
40 : // Must be included after standard includes, otherwise VS2015 fails when
41 : // including <ctime>
42 : #include "netcdfdataset.h"
43 : #include "netcdfdrivercore.h"
44 : #include "netcdfsg.h"
45 : #include "netcdfuffd.h"
46 :
47 : #include "netcdf_mem.h"
48 :
49 : #include "cpl_conv.h"
50 : #include "cpl_error.h"
51 : #include "cpl_float.h"
52 : #include "cpl_json.h"
53 : #include "cpl_minixml.h"
54 : #include "cpl_multiproc.h"
55 : #include "cpl_progress.h"
56 : #include "cpl_time.h"
57 : #include "gdal.h"
58 : #include "gdal_frmts.h"
59 : #include "gdal_priv_templates.hpp"
60 : #include "ogr_core.h"
61 : #include "ogr_srs_api.h"
62 :
63 : // netCDF 4.8 switched to expecting filenames in UTF-8 on Windows
64 : // But with netCDF 4.9 and https://github.com/Unidata/netcdf-c/pull/2277/,
65 : // this is apparently back to expecting filenames in current codepage...
66 : // Detect netCDF 4.8 with NC_ENCZARR
67 : // Detect netCDF 4.9 with NC_NOATTCREORD
68 : #if defined(NC_ENCZARR) && !defined(NC_NOATTCREORD)
69 : #define NETCDF_USES_UTF8
70 : #endif
71 :
72 : // Internal function declarations.
73 :
74 : static bool NCDFIsGDALVersionGTE(const char *pszVersion, int nTarget);
75 :
76 : static void
77 : NCDFAddGDALHistory(int fpImage, const char *pszFilename, bool bWriteGDALVersion,
78 : bool bWriteGDALHistory, const char *pszOldHist,
79 : const char *pszFunctionName,
80 : const char *pszCFVersion = GDAL_DEFAULT_NCDF_CONVENTIONS);
81 :
82 : static void NCDFAddHistory(int fpImage, const char *pszAddHist,
83 : const char *pszOldHist);
84 :
85 : static CPLErr NCDFSafeStrcat(char **ppszDest, const char *pszSrc,
86 : size_t *nDestSize);
87 :
88 : // Var / attribute helper functions.
89 : static CPLErr NCDFPutAttr(int nCdfId, int nVarId, const char *pszAttrName,
90 : const char *pszValue);
91 :
92 : // Replace this where used.
93 : static CPLErr NCDFGet1DVar(int nCdfId, int nVarId, char **pszValue);
94 : static CPLErr NCDFPut1DVar(int nCdfId, int nVarId, const char *pszValue);
95 :
96 : // Replace this where used.
97 : static char **NCDFTokenizeArray(const char *pszValue);
98 : static void CopyMetadata(GDALDataset *poSrcDS, GDALRasterBand *poSrcBand,
99 : GDALRasterBand *poDstBand, int fpImage, int CDFVarID,
100 : const char *pszMatchPrefix = nullptr);
101 :
102 : // NetCDF-4 groups helper functions.
103 : // They all work also for NetCDF-3 files which are considered as
104 : // NetCDF-4 file with only one group.
105 : static CPLErr NCDFOpenSubDataset(int nCdfId, const char *pszSubdatasetName,
106 : int *pnGroupId, int *pnVarId);
107 : static CPLErr NCDFGetVisibleDims(int nGroupId, int *pnDims, int **ppanDimIds);
108 : static CPLErr NCDFGetSubGroups(int nGroupId, int *pnSubGroups,
109 : int **ppanSubGroupIds);
110 : static CPLErr NCDFGetGroupFullName(int nGroupId, char **ppszFullName,
111 : bool bNC3Compat = true);
112 : static CPLErr NCDFGetVarFullName(int nGroupId, int nVarId, char **ppszFullName,
113 : bool bNC3Compat = true);
114 : static CPLErr NCDFGetRootGroup(int nStartGroupId, int *pnRootGroupId);
115 :
116 : static CPLErr NCDFResolveVarFullName(int nStartGroupId, const char *pszVar,
117 : char **ppszFullName,
118 : bool bMandatory = false);
119 : static CPLErr NCDFResolveAttInt(int nStartGroupId, int nStartVarId,
120 : const char *pszAtt, int *pnAtt,
121 : bool bMandatory = false);
122 : static CPLErr NCDFGetCoordAndBoundVarFullNames(int nCdfId, char ***ppapszVars);
123 :
124 : // Uncomment this for more debug output.
125 : // #define NCDF_DEBUG 1
126 :
127 : CPLMutex *hNCMutex = nullptr;
128 :
129 : // Workaround https://github.com/OSGeo/gdal/issues/6253
130 : // Having 2 netCDF handles on the same file doesn't work in a multi-threaded
131 : // way. Apparently having the same handle works better (this is OK since
132 : // we have a global mutex on the netCDF library)
133 : static std::map<std::string, int> goMapNameToNetCDFId;
134 : static std::map<int, std::pair<std::string, int>> goMapNetCDFIdToKeyAndCount;
135 :
136 667 : int GDAL_nc_open(const char *pszFilename, int nMode, int *pID)
137 : {
138 1334 : std::string osKey(pszFilename);
139 667 : osKey += "#####";
140 667 : osKey += std::to_string(nMode);
141 667 : auto oIter = goMapNameToNetCDFId.find(osKey);
142 667 : if (oIter == goMapNameToNetCDFId.end())
143 : {
144 618 : int ret = nc_open(pszFilename, nMode, pID);
145 618 : if (ret != NC_NOERR)
146 3 : return ret;
147 615 : goMapNameToNetCDFId[osKey] = *pID;
148 615 : goMapNetCDFIdToKeyAndCount[*pID] =
149 1230 : std::pair<std::string, int>(osKey, 1);
150 615 : return ret;
151 : }
152 : else
153 : {
154 49 : *pID = oIter->second;
155 49 : goMapNetCDFIdToKeyAndCount[oIter->second].second++;
156 49 : return NC_NOERR;
157 : }
158 : }
159 :
160 923 : int GDAL_nc_close(int cdfid)
161 : {
162 923 : int ret = NC_NOERR;
163 923 : auto oIter = goMapNetCDFIdToKeyAndCount.find(cdfid);
164 923 : if (oIter != goMapNetCDFIdToKeyAndCount.end())
165 : {
166 664 : if (--oIter->second.second == 0)
167 : {
168 615 : ret = nc_close(cdfid);
169 615 : goMapNameToNetCDFId.erase(oIter->second.first);
170 615 : goMapNetCDFIdToKeyAndCount.erase(oIter);
171 : }
172 : }
173 : else
174 : {
175 : // we can go here if file opened with nc_open_mem() or nc_create()
176 259 : ret = nc_close(cdfid);
177 : }
178 923 : return ret;
179 : }
180 :
181 : /************************************************************************/
182 : /* ==================================================================== */
183 : /* netCDFRasterBand */
184 : /* ==================================================================== */
185 : /************************************************************************/
186 :
187 : class netCDFRasterBand final : public GDALPamRasterBand
188 : {
189 : friend class netCDFDataset;
190 :
191 : nc_type nc_datatype;
192 : int cdfid;
193 : int nZId;
194 : int nZDim;
195 : int nLevel;
196 : int nBandXPos;
197 : int nBandYPos;
198 : int *panBandZPos;
199 : int *panBandZLev;
200 : bool m_bNoDataSet = false;
201 : double m_dfNoDataValue = 0;
202 : bool m_bNoDataSetAsInt64 = false;
203 : int64_t m_nNodataValueInt64 = 0;
204 : bool m_bNoDataSetAsUInt64 = false;
205 : uint64_t m_nNodataValueUInt64 = 0;
206 : bool bValidRangeValid = false;
207 : double adfValidRange[2]{0, 0};
208 : bool m_bHaveScale = false;
209 : bool m_bHaveOffset = false;
210 : double m_dfScale = 1;
211 : double m_dfOffset = 0;
212 : CPLString m_osUnitType{};
213 : bool bSignedData;
214 : bool bCheckLongitude;
215 : bool m_bCreateMetadataFromOtherVarsDone = false;
216 :
217 : void CreateMetadataFromAttributes();
218 : void CreateMetadataFromOtherVars();
219 :
220 : template <class T>
221 : void CheckData(void *pImage, void *pImageNC, size_t nTmpBlockXSize,
222 : size_t nTmpBlockYSize, bool bCheckIsNan = false);
223 : template <class T>
224 : void CheckDataCpx(void *pImage, void *pImageNC, size_t nTmpBlockXSize,
225 : size_t nTmpBlockYSize, bool bCheckIsNan = false);
226 : void SetBlockSize();
227 :
228 : bool FetchNetcdfChunk(size_t xstart, size_t ystart, void *pImage);
229 :
230 : void SetNoDataValueNoUpdate(double dfNoData);
231 : void SetNoDataValueNoUpdate(int64_t nNoData);
232 : void SetNoDataValueNoUpdate(uint64_t nNoData);
233 :
234 : void SetOffsetNoUpdate(double dfVal);
235 : void SetScaleNoUpdate(double dfVal);
236 : void SetUnitTypeNoUpdate(const char *pszNewValue);
237 :
238 : protected:
239 : CPLXMLNode *SerializeToXML(const char *pszUnused) override;
240 :
241 : public:
242 : struct CONSTRUCTOR_OPEN
243 : {
244 : };
245 :
246 : struct CONSTRUCTOR_CREATE
247 : {
248 : };
249 :
250 : netCDFRasterBand(const CONSTRUCTOR_OPEN &, netCDFDataset *poDS,
251 : int nGroupId, int nZId, int nZDim, int nLevel,
252 : const int *panBandZLen, const int *panBandPos, int nBand);
253 : netCDFRasterBand(const CONSTRUCTOR_CREATE &, netCDFDataset *poDS,
254 : GDALDataType eType, int nBand, bool bSigned = true,
255 : const char *pszBandName = nullptr,
256 : const char *pszLongName = nullptr, int nZId = -1,
257 : int nZDim = 2, int nLevel = 0,
258 : const int *panBandZLev = nullptr,
259 : const int *panBandZPos = nullptr,
260 : const int *paDimIds = nullptr);
261 : virtual ~netCDFRasterBand();
262 :
263 : virtual double GetNoDataValue(int *) override;
264 : virtual int64_t GetNoDataValueAsInt64(int *pbSuccess = nullptr) override;
265 : virtual uint64_t GetNoDataValueAsUInt64(int *pbSuccess = nullptr) override;
266 : virtual CPLErr SetNoDataValue(double) override;
267 : virtual CPLErr SetNoDataValueAsInt64(int64_t nNoData) override;
268 : virtual CPLErr SetNoDataValueAsUInt64(uint64_t nNoData) override;
269 : // virtual CPLErr DeleteNoDataValue();
270 : virtual double GetOffset(int *) override;
271 : virtual CPLErr SetOffset(double) override;
272 : virtual double GetScale(int *) override;
273 : virtual CPLErr SetScale(double) override;
274 : virtual const char *GetUnitType() override;
275 : virtual CPLErr SetUnitType(const char *) override;
276 : virtual CPLErr IReadBlock(int, int, void *) override;
277 : virtual CPLErr IWriteBlock(int, int, void *) override;
278 :
279 : char **GetMetadata(const char *pszDomain = "") override;
280 : const char *GetMetadataItem(const char *pszName,
281 : const char *pszDomain = "") override;
282 :
283 : virtual CPLErr SetMetadataItem(const char *pszName, const char *pszValue,
284 : const char *pszDomain = "") override;
285 : virtual CPLErr SetMetadata(char **papszMD,
286 : const char *pszDomain = "") override;
287 : };
288 :
289 : /************************************************************************/
290 : /* netCDFRasterBand() */
291 : /************************************************************************/
292 :
293 472 : netCDFRasterBand::netCDFRasterBand(const netCDFRasterBand::CONSTRUCTOR_OPEN &,
294 : netCDFDataset *poNCDFDS, int nGroupId,
295 : int nZIdIn, int nZDimIn, int nLevelIn,
296 : const int *panBandZLevIn,
297 472 : const int *panBandZPosIn, int nBandIn)
298 : : nc_datatype(NC_NAT), cdfid(nGroupId), nZId(nZIdIn), nZDim(nZDimIn),
299 472 : nLevel(nLevelIn), nBandXPos(panBandZPosIn[0]),
300 472 : nBandYPos(nZDim == 1 ? -1 : panBandZPosIn[1]), panBandZPos(nullptr),
301 : panBandZLev(nullptr),
302 : bSignedData(true), // Default signed, except for Byte.
303 944 : bCheckLongitude(false)
304 : {
305 472 : poDS = poNCDFDS;
306 472 : nBand = nBandIn;
307 :
308 : // Take care of all other dimensions.
309 472 : if (nZDim > 2)
310 : {
311 168 : panBandZPos = static_cast<int *>(CPLCalloc(nZDim - 1, sizeof(int)));
312 168 : panBandZLev = static_cast<int *>(CPLCalloc(nZDim - 1, sizeof(int)));
313 :
314 462 : for (int i = 0; i < nZDim - 2; i++)
315 : {
316 294 : panBandZPos[i] = panBandZPosIn[i + 2];
317 294 : panBandZLev[i] = panBandZLevIn[i];
318 : }
319 : }
320 :
321 472 : nRasterXSize = poDS->GetRasterXSize();
322 472 : nRasterYSize = poDS->GetRasterYSize();
323 472 : nBlockXSize = poDS->GetRasterXSize();
324 472 : nBlockYSize = 1;
325 :
326 : // Get the type of the "z" variable, our target raster array.
327 472 : if (nc_inq_var(cdfid, nZId, nullptr, &nc_datatype, nullptr, nullptr,
328 472 : nullptr) != NC_NOERR)
329 : {
330 0 : CPLError(CE_Failure, CPLE_AppDefined, "Error in nc_var_inq() on 'z'.");
331 0 : return;
332 : }
333 :
334 472 : if (NCDFIsUserDefinedType(cdfid, nc_datatype))
335 : {
336 : // First enquire and check that the number of fields is 2
337 : size_t nfields, compoundsize;
338 5 : if (nc_inq_compound(cdfid, nc_datatype, nullptr, &compoundsize,
339 5 : &nfields) != NC_NOERR)
340 : {
341 0 : CPLError(CE_Failure, CPLE_AppDefined,
342 : "Error in nc_inq_compound() on 'z'.");
343 0 : return;
344 : }
345 :
346 5 : if (nfields != 2)
347 : {
348 0 : CPLError(CE_Failure, CPLE_AppDefined,
349 : "Unsupported data type encountered in nc_inq_compound() "
350 : "on 'z'.");
351 0 : return;
352 : }
353 :
354 : // Now check that that two types are the same in the struct.
355 : nc_type field_type1, field_type2;
356 : int field_dims1, field_dims2;
357 5 : if (nc_inq_compound_field(cdfid, nc_datatype, 0, nullptr, nullptr,
358 : &field_type1, &field_dims1,
359 5 : nullptr) != NC_NOERR)
360 : {
361 0 : CPLError(
362 : CE_Failure, CPLE_AppDefined,
363 : "Error in querying Field 1 in nc_inq_compound_field() on 'z'.");
364 0 : return;
365 : }
366 :
367 5 : if (nc_inq_compound_field(cdfid, nc_datatype, 0, nullptr, nullptr,
368 : &field_type2, &field_dims2,
369 5 : nullptr) != NC_NOERR)
370 : {
371 0 : CPLError(
372 : CE_Failure, CPLE_AppDefined,
373 : "Error in querying Field 2 in nc_inq_compound_field() on 'z'.");
374 0 : return;
375 : }
376 :
377 5 : if ((field_type1 != field_type2) || (field_dims1 != field_dims2) ||
378 5 : (field_dims1 != 0))
379 : {
380 0 : CPLError(CE_Failure, CPLE_AppDefined,
381 : "Error in interpreting compound data type on 'z'.");
382 0 : return;
383 : }
384 :
385 5 : if (field_type1 == NC_SHORT)
386 0 : eDataType = GDT_CInt16;
387 5 : else if (field_type1 == NC_INT)
388 0 : eDataType = GDT_CInt32;
389 5 : else if (field_type1 == NC_FLOAT)
390 4 : eDataType = GDT_CFloat32;
391 1 : else if (field_type1 == NC_DOUBLE)
392 1 : eDataType = GDT_CFloat64;
393 : else
394 : {
395 0 : CPLError(CE_Failure, CPLE_AppDefined,
396 : "Unsupported netCDF compound data type encountered.");
397 0 : return;
398 : }
399 : }
400 : else
401 : {
402 467 : if (nc_datatype == NC_BYTE)
403 145 : eDataType = GDT_Byte;
404 322 : else if (nc_datatype == NC_CHAR)
405 0 : eDataType = GDT_Byte;
406 322 : else if (nc_datatype == NC_SHORT)
407 41 : eDataType = GDT_Int16;
408 281 : else if (nc_datatype == NC_INT)
409 89 : eDataType = GDT_Int32;
410 192 : else if (nc_datatype == NC_FLOAT)
411 115 : eDataType = GDT_Float32;
412 77 : else if (nc_datatype == NC_DOUBLE)
413 40 : eDataType = GDT_Float64;
414 37 : else if (nc_datatype == NC_UBYTE)
415 15 : eDataType = GDT_Byte;
416 22 : else if (nc_datatype == NC_USHORT)
417 4 : eDataType = GDT_UInt16;
418 18 : else if (nc_datatype == NC_UINT)
419 3 : eDataType = GDT_UInt32;
420 15 : else if (nc_datatype == NC_INT64)
421 8 : eDataType = GDT_Int64;
422 7 : else if (nc_datatype == NC_UINT64)
423 7 : eDataType = GDT_UInt64;
424 : else
425 : {
426 0 : if (nBand == 1)
427 0 : CPLError(CE_Warning, CPLE_AppDefined,
428 : "Unsupported netCDF datatype (%d), treat as Float32.",
429 0 : static_cast<int>(nc_datatype));
430 0 : eDataType = GDT_Float32;
431 0 : nc_datatype = NC_FLOAT;
432 : }
433 : }
434 :
435 : // Find and set No Data for this variable.
436 472 : nc_type atttype = NC_NAT;
437 472 : size_t attlen = 0;
438 472 : const char *pszNoValueName = nullptr;
439 :
440 : // Find attribute name, either _FillValue or missing_value.
441 472 : int status = nc_inq_att(cdfid, nZId, NCDF_FillValue, &atttype, &attlen);
442 472 : if (status == NC_NOERR)
443 : {
444 248 : pszNoValueName = NCDF_FillValue;
445 : }
446 : else
447 : {
448 224 : status = nc_inq_att(cdfid, nZId, "missing_value", &atttype, &attlen);
449 224 : if (status == NC_NOERR)
450 : {
451 12 : pszNoValueName = "missing_value";
452 : }
453 : }
454 :
455 : // Fetch missing value.
456 472 : double dfNoData = 0.0;
457 472 : bool bGotNoData = false;
458 472 : int64_t nNoDataAsInt64 = 0;
459 472 : bool bGotNoDataAsInt64 = false;
460 472 : uint64_t nNoDataAsUInt64 = 0;
461 472 : bool bGotNoDataAsUInt64 = false;
462 472 : if (status == NC_NOERR)
463 : {
464 260 : nc_type nAttrType = NC_NAT;
465 260 : size_t nAttrLen = 0;
466 260 : status = nc_inq_att(cdfid, nZId, pszNoValueName, &nAttrType, &nAttrLen);
467 260 : if (status == NC_NOERR && nAttrLen == 1 && nAttrType == NC_INT64)
468 : {
469 : long long v;
470 7 : nc_get_att_longlong(cdfid, nZId, pszNoValueName, &v);
471 7 : bGotNoData = true;
472 7 : bGotNoDataAsInt64 = true;
473 7 : nNoDataAsInt64 = static_cast<int64_t>(v);
474 : }
475 253 : else if (status == NC_NOERR && nAttrLen == 1 && nAttrType == NC_UINT64)
476 : {
477 : unsigned long long v;
478 7 : nc_get_att_ulonglong(cdfid, nZId, pszNoValueName, &v);
479 7 : bGotNoData = true;
480 7 : bGotNoDataAsUInt64 = true;
481 7 : nNoDataAsUInt64 = static_cast<uint64_t>(v);
482 : }
483 246 : else if (NCDFGetAttr(cdfid, nZId, pszNoValueName, &dfNoData) == CE_None)
484 : {
485 245 : bGotNoData = true;
486 : }
487 : }
488 :
489 : // If NoData was not found, use the default value, but for non-Byte types
490 : // as it is not recommended:
491 : // https://www.unidata.ucar.edu/software/netcdf/docs/attribute_conventions.html
492 472 : nc_type vartype = NC_NAT;
493 472 : if (!bGotNoData)
494 : {
495 213 : nc_inq_vartype(cdfid, nZId, &vartype);
496 213 : if (vartype == NC_INT64)
497 : {
498 : nNoDataAsInt64 =
499 1 : NCDFGetDefaultNoDataValueAsInt64(cdfid, nZId, bGotNoData);
500 1 : bGotNoDataAsInt64 = bGotNoData;
501 : }
502 212 : else if (vartype == NC_UINT64)
503 : {
504 : nNoDataAsUInt64 =
505 0 : NCDFGetDefaultNoDataValueAsUInt64(cdfid, nZId, bGotNoData);
506 0 : bGotNoDataAsUInt64 = bGotNoData;
507 : }
508 212 : else if (vartype != NC_CHAR && vartype != NC_BYTE &&
509 90 : vartype != NC_UBYTE)
510 : {
511 81 : dfNoData =
512 81 : NCDFGetDefaultNoDataValue(cdfid, nZId, vartype, bGotNoData);
513 81 : if (bGotNoData)
514 : {
515 70 : CPLDebug("GDAL_netCDF",
516 : "did not get nodata value for variable #%d, using "
517 : "default %f",
518 : nZId, dfNoData);
519 : }
520 : }
521 : }
522 :
523 472 : bool bHasUnderscoreUnsignedAttr = false;
524 472 : bool bUnderscoreUnsignedAttrVal = false;
525 : {
526 472 : char *pszTemp = nullptr;
527 472 : if (NCDFGetAttr(cdfid, nZId, "_Unsigned", &pszTemp) == CE_None)
528 : {
529 137 : if (EQUAL(pszTemp, "true"))
530 : {
531 129 : bHasUnderscoreUnsignedAttr = true;
532 129 : bUnderscoreUnsignedAttrVal = true;
533 : }
534 8 : else if (EQUAL(pszTemp, "false"))
535 : {
536 8 : bHasUnderscoreUnsignedAttr = true;
537 8 : bUnderscoreUnsignedAttrVal = false;
538 : }
539 137 : CPLFree(pszTemp);
540 : }
541 : }
542 :
543 : // Look for valid_range or valid_min/valid_max.
544 :
545 : // First look for valid_range.
546 472 : if (CPLFetchBool(poNCDFDS->GetOpenOptions(), "HONOUR_VALID_RANGE", true))
547 : {
548 470 : char *pszValidRange = nullptr;
549 470 : if (NCDFGetAttr(cdfid, nZId, "valid_range", &pszValidRange) ==
550 130 : CE_None &&
551 600 : pszValidRange[0] == '{' &&
552 130 : pszValidRange[strlen(pszValidRange) - 1] == '}')
553 : {
554 : const std::string osValidRange =
555 390 : std::string(pszValidRange).substr(1, strlen(pszValidRange) - 2);
556 : const CPLStringList aosValidRange(
557 260 : CSLTokenizeString2(osValidRange.c_str(), ",", 0));
558 130 : if (aosValidRange.size() == 2 &&
559 260 : CPLGetValueType(aosValidRange[0]) != CPL_VALUE_STRING &&
560 130 : CPLGetValueType(aosValidRange[1]) != CPL_VALUE_STRING)
561 : {
562 130 : bValidRangeValid = true;
563 130 : adfValidRange[0] = CPLAtof(aosValidRange[0]);
564 130 : adfValidRange[1] = CPLAtof(aosValidRange[1]);
565 : }
566 : }
567 470 : CPLFree(pszValidRange);
568 :
569 : // If not found look for valid_min and valid_max.
570 470 : if (!bValidRangeValid)
571 : {
572 340 : double dfMin = 0;
573 340 : double dfMax = 0;
574 355 : if (NCDFGetAttr(cdfid, nZId, "valid_min", &dfMin) == CE_None &&
575 15 : NCDFGetAttr(cdfid, nZId, "valid_max", &dfMax) == CE_None)
576 : {
577 8 : adfValidRange[0] = dfMin;
578 8 : adfValidRange[1] = dfMax;
579 8 : bValidRangeValid = true;
580 : }
581 : }
582 :
583 470 : if (bValidRangeValid &&
584 138 : (adfValidRange[0] < 0 || adfValidRange[1] < 0) &&
585 17 : nc_datatype == NC_SHORT && bHasUnderscoreUnsignedAttr &&
586 : bUnderscoreUnsignedAttrVal)
587 : {
588 2 : if (adfValidRange[0] < 0)
589 0 : adfValidRange[0] += 65536;
590 2 : if (adfValidRange[1] < 0)
591 2 : adfValidRange[1] += 65536;
592 2 : if (adfValidRange[0] <= adfValidRange[1])
593 : {
594 : // Updating metadata item
595 2 : GDALPamRasterBand::SetMetadataItem(
596 : "valid_range",
597 2 : CPLSPrintf("{%d,%d}", static_cast<int>(adfValidRange[0]),
598 2 : static_cast<int>(adfValidRange[1])));
599 : }
600 : }
601 :
602 470 : if (bValidRangeValid && adfValidRange[0] > adfValidRange[1])
603 : {
604 0 : CPLError(CE_Warning, CPLE_AppDefined,
605 : "netCDFDataset::valid_range: min > max:\n"
606 : " min: %lf\n max: %lf\n",
607 : adfValidRange[0], adfValidRange[1]);
608 0 : bValidRangeValid = false;
609 0 : adfValidRange[0] = 0.0;
610 0 : adfValidRange[1] = 0.0;
611 : }
612 : }
613 :
614 : // Special For Byte Bands: check for signed/unsigned byte.
615 472 : if (nc_datatype == NC_BYTE)
616 : {
617 : // netcdf uses signed byte by default, but GDAL uses unsigned by default
618 : // This may cause unexpected results, but is needed for back-compat.
619 145 : if (poNCDFDS->bIsGdalFile)
620 124 : bSignedData = false;
621 : else
622 21 : bSignedData = true;
623 :
624 : // For NC4 format NC_BYTE is (normally) signed, NC_UBYTE is unsigned.
625 : // But in case a NC3 file was converted automatically and has hints
626 : // that it is unsigned, take them into account
627 145 : if (poNCDFDS->eFormat == NCDF_FORMAT_NC4)
628 : {
629 3 : bSignedData = true;
630 : }
631 :
632 : // If we got valid_range, test for signed/unsigned range.
633 : // https://docs.unidata.ucar.edu/netcdf-c/current/attribute_conventions.html
634 145 : if (bValidRangeValid)
635 : {
636 : // If we got valid_range={0,255}, treat as unsigned.
637 126 : if (adfValidRange[0] == 0 && adfValidRange[1] == 255)
638 : {
639 118 : bSignedData = false;
640 : // Reset valid_range.
641 118 : bValidRangeValid = false;
642 : }
643 : // If we got valid_range={-128,127}, treat as signed.
644 8 : else if (adfValidRange[0] == -128 && adfValidRange[1] == 127)
645 : {
646 8 : bSignedData = true;
647 : // Reset valid_range.
648 8 : bValidRangeValid = false;
649 : }
650 : }
651 : // Else test for _Unsigned.
652 : // https://docs.unidata.ucar.edu/nug/current/best_practices.html
653 : else
654 : {
655 19 : if (bHasUnderscoreUnsignedAttr)
656 7 : bSignedData = !bUnderscoreUnsignedAttrVal;
657 : }
658 :
659 145 : if (bSignedData)
660 : {
661 20 : eDataType = GDT_Int8;
662 : }
663 125 : else if (dfNoData < 0)
664 : {
665 : // Fix nodata value as it was stored signed.
666 6 : dfNoData += 256;
667 6 : if (pszNoValueName)
668 : {
669 : // Updating metadata item
670 6 : GDALPamRasterBand::SetMetadataItem(
671 : pszNoValueName,
672 : CPLSPrintf("%d", static_cast<int>(dfNoData)));
673 : }
674 : }
675 : }
676 327 : else if (nc_datatype == NC_SHORT)
677 : {
678 41 : if (bHasUnderscoreUnsignedAttr)
679 : {
680 4 : bSignedData = !bUnderscoreUnsignedAttrVal;
681 4 : if (!bSignedData)
682 4 : eDataType = GDT_UInt16;
683 : }
684 :
685 : // Fix nodata value as it was stored signed.
686 41 : if (!bSignedData && dfNoData < 0)
687 : {
688 4 : dfNoData += 65536;
689 4 : if (pszNoValueName)
690 : {
691 : // Updating metadata item
692 4 : GDALPamRasterBand::SetMetadataItem(
693 : pszNoValueName,
694 : CPLSPrintf("%d", static_cast<int>(dfNoData)));
695 : }
696 : }
697 : }
698 :
699 286 : else if (nc_datatype == NC_UBYTE || nc_datatype == NC_USHORT ||
700 267 : nc_datatype == NC_UINT || nc_datatype == NC_UINT64)
701 : {
702 29 : bSignedData = false;
703 : }
704 :
705 472 : CPLDebug("GDAL_netCDF", "netcdf type=%d gdal type=%d signedByte=%d",
706 472 : nc_datatype, eDataType, static_cast<int>(bSignedData));
707 :
708 472 : if (bGotNoData)
709 : {
710 : // Set nodata value.
711 330 : if (bGotNoDataAsInt64)
712 : {
713 8 : if (eDataType == GDT_Int64)
714 : {
715 8 : SetNoDataValueNoUpdate(nNoDataAsInt64);
716 : }
717 0 : else if (eDataType == GDT_UInt64 && nNoDataAsInt64 >= 0)
718 : {
719 0 : SetNoDataValueNoUpdate(static_cast<uint64_t>(nNoDataAsInt64));
720 : }
721 : else
722 : {
723 0 : SetNoDataValueNoUpdate(static_cast<double>(nNoDataAsInt64));
724 : }
725 : }
726 322 : else if (bGotNoDataAsUInt64)
727 : {
728 7 : if (eDataType == GDT_UInt64)
729 : {
730 7 : SetNoDataValueNoUpdate(nNoDataAsUInt64);
731 : }
732 0 : else if (eDataType == GDT_Int64 &&
733 : nNoDataAsUInt64 <=
734 0 : static_cast<uint64_t>(
735 0 : std::numeric_limits<int64_t>::max()))
736 : {
737 0 : SetNoDataValueNoUpdate(static_cast<int64_t>(nNoDataAsUInt64));
738 : }
739 : else
740 : {
741 0 : SetNoDataValueNoUpdate(static_cast<double>(nNoDataAsUInt64));
742 : }
743 : }
744 : else
745 : {
746 : #ifdef NCDF_DEBUG
747 : CPLDebug("GDAL_netCDF", "SetNoDataValue(%f) read", dfNoData);
748 : #endif
749 315 : if (eDataType == GDT_Int64 && GDALIsValueExactAs<int64_t>(dfNoData))
750 : {
751 0 : SetNoDataValueNoUpdate(static_cast<int64_t>(dfNoData));
752 : }
753 315 : else if (eDataType == GDT_UInt64 &&
754 0 : GDALIsValueExactAs<uint64_t>(dfNoData))
755 : {
756 0 : SetNoDataValueNoUpdate(static_cast<uint64_t>(dfNoData));
757 : }
758 : else
759 : {
760 315 : SetNoDataValueNoUpdate(dfNoData);
761 : }
762 : }
763 : }
764 :
765 472 : CreateMetadataFromAttributes();
766 :
767 : // Attempt to fetch the scale_factor and add_offset attributes for the
768 : // variable and set them. If these values are not available, set
769 : // offset to 0 and scale to 1.
770 472 : if (nc_inq_attid(cdfid, nZId, CF_ADD_OFFSET, nullptr) == NC_NOERR)
771 : {
772 16 : double dfOffset = 0;
773 16 : status = nc_get_att_double(cdfid, nZId, CF_ADD_OFFSET, &dfOffset);
774 16 : CPLDebug("GDAL_netCDF", "got add_offset=%.16g, status=%d", dfOffset,
775 : status);
776 16 : SetOffsetNoUpdate(dfOffset);
777 : }
778 :
779 472 : bool bHasScale = false;
780 472 : if (nc_inq_attid(cdfid, nZId, CF_SCALE_FACTOR, nullptr) == NC_NOERR)
781 : {
782 20 : bHasScale = true;
783 20 : double dfScale = 1;
784 20 : status = nc_get_att_double(cdfid, nZId, CF_SCALE_FACTOR, &dfScale);
785 20 : CPLDebug("GDAL_netCDF", "got scale_factor=%.16g, status=%d", dfScale,
786 : status);
787 20 : SetScaleNoUpdate(dfScale);
788 : }
789 :
790 12 : if (bValidRangeValid && GDALDataTypeIsInteger(eDataType) &&
791 4 : eDataType != GDT_Int64 && eDataType != GDT_UInt64 &&
792 4 : (std::fabs(std::round(adfValidRange[0]) - adfValidRange[0]) > 1e-5 ||
793 484 : std::fabs(std::round(adfValidRange[1]) - adfValidRange[1]) > 1e-5) &&
794 1 : CSLFetchNameValue(poNCDFDS->GetOpenOptions(), "HONOUR_VALID_RANGE") ==
795 : nullptr)
796 : {
797 1 : CPLError(CE_Warning, CPLE_AppDefined,
798 : "validity range = %f, %f contains floating-point values, "
799 : "whereas data type is integer. valid_range is thus likely "
800 : "wrong%s. Ignoring it.",
801 : adfValidRange[0], adfValidRange[1],
802 : bHasScale ? " (likely scaled using scale_factor/add_factor "
803 : "whereas it should be using the packed data type)"
804 : : "");
805 1 : bValidRangeValid = false;
806 1 : adfValidRange[0] = 0.0;
807 1 : adfValidRange[1] = 0.0;
808 : }
809 :
810 : // Should we check for longitude values > 360?
811 472 : bCheckLongitude =
812 944 : CPLTestBool(CPLGetConfigOption("GDAL_NETCDF_CENTERLONG_180", "YES")) &&
813 472 : NCDFIsVarLongitude(cdfid, nZId, nullptr);
814 :
815 : // Attempt to fetch the units attribute for the variable and set it.
816 472 : SetUnitTypeNoUpdate(netCDFRasterBand::GetMetadataItem(CF_UNITS));
817 :
818 472 : SetBlockSize();
819 : }
820 :
821 654 : void netCDFRasterBand::SetBlockSize()
822 : {
823 : // Check for variable chunking (netcdf-4 only).
824 : // GDAL block size should be set to hdf5 chunk size.
825 654 : int nTmpFormat = 0;
826 654 : int status = nc_inq_format(cdfid, &nTmpFormat);
827 654 : NetCDFFormatEnum eTmpFormat = static_cast<NetCDFFormatEnum>(nTmpFormat);
828 654 : if ((status == NC_NOERR) &&
829 561 : (eTmpFormat == NCDF_FORMAT_NC4 || eTmpFormat == NCDF_FORMAT_NC4C))
830 : {
831 109 : size_t chunksize[MAX_NC_DIMS] = {};
832 : // Check for chunksize and set it as the blocksize (optimizes read).
833 109 : status = nc_inq_var_chunking(cdfid, nZId, &nTmpFormat, chunksize);
834 109 : if ((status == NC_NOERR) && (nTmpFormat == NC_CHUNKED))
835 : {
836 13 : nBlockXSize = (int)chunksize[nZDim - 1];
837 13 : if (nZDim >= 2)
838 13 : nBlockYSize = (int)chunksize[nZDim - 2];
839 : else
840 0 : nBlockYSize = 1;
841 : }
842 : }
843 :
844 : // Deal with bottom-up datasets and nBlockYSize != 1.
845 654 : auto poGDS = static_cast<netCDFDataset *>(poDS);
846 654 : if (poGDS->bBottomUp && nBlockYSize != 1 && poGDS->poChunkCache == nullptr)
847 : {
848 5 : if (poGDS->eAccess == GA_ReadOnly)
849 : {
850 : // Try to cache 1 or 2 'rows' of netCDF chunks along the whole
851 : // width of the raster
852 5 : size_t nChunks =
853 5 : static_cast<size_t>(DIV_ROUND_UP(nRasterXSize, nBlockXSize));
854 5 : if ((nRasterYSize % nBlockYSize) != 0)
855 1 : nChunks *= 2;
856 : const size_t nChunkSize =
857 5 : static_cast<size_t>(GDALGetDataTypeSizeBytes(eDataType)) *
858 5 : nBlockXSize * nBlockYSize;
859 5 : constexpr size_t MAX_CACHE_SIZE = 100 * 1024 * 1024;
860 5 : nChunks = std::min(nChunks, MAX_CACHE_SIZE / nChunkSize);
861 5 : if (nChunks)
862 : {
863 5 : poGDS->poChunkCache.reset(
864 5 : new netCDFDataset::ChunkCacheType(nChunks));
865 : }
866 : }
867 : else
868 : {
869 0 : nBlockYSize = 1;
870 : }
871 : }
872 654 : }
873 :
874 : // Constructor in create mode.
875 : // If nZId and following variables are not passed, the band will have 2
876 : // dimensions.
877 : // TODO: Get metadata, missing val from band #1 if nZDim > 2.
878 182 : netCDFRasterBand::netCDFRasterBand(
879 : const netCDFRasterBand::CONSTRUCTOR_CREATE &, netCDFDataset *poNCDFDS,
880 : const GDALDataType eTypeIn, int nBandIn, bool bSigned,
881 : const char *pszBandName, const char *pszLongName, int nZIdIn, int nZDimIn,
882 : int nLevelIn, const int *panBandZLevIn, const int *panBandZPosIn,
883 182 : const int *paDimIds)
884 182 : : nc_datatype(NC_NAT), cdfid(poNCDFDS->GetCDFID()), nZId(nZIdIn),
885 : nZDim(nZDimIn), nLevel(nLevelIn), nBandXPos(1), nBandYPos(0),
886 : panBandZPos(nullptr), panBandZLev(nullptr), bSignedData(bSigned),
887 182 : bCheckLongitude(false), m_bCreateMetadataFromOtherVarsDone(true)
888 : {
889 182 : poDS = poNCDFDS;
890 182 : nBand = nBandIn;
891 :
892 182 : nRasterXSize = poDS->GetRasterXSize();
893 182 : nRasterYSize = poDS->GetRasterYSize();
894 182 : nBlockXSize = poDS->GetRasterXSize();
895 182 : nBlockYSize = 1;
896 :
897 182 : if (poDS->GetAccess() != GA_Update)
898 : {
899 0 : CPLError(CE_Failure, CPLE_NotSupported,
900 : "Dataset is not in update mode, "
901 : "wrong netCDFRasterBand constructor");
902 0 : return;
903 : }
904 :
905 : // Take care of all other dimensions.
906 182 : if (nZDim > 2 && paDimIds != nullptr)
907 : {
908 27 : nBandXPos = panBandZPosIn[0];
909 27 : nBandYPos = panBandZPosIn[1];
910 :
911 27 : panBandZPos = static_cast<int *>(CPLCalloc(nZDim - 1, sizeof(int)));
912 27 : panBandZLev = static_cast<int *>(CPLCalloc(nZDim - 1, sizeof(int)));
913 :
914 76 : for (int i = 0; i < nZDim - 2; i++)
915 : {
916 49 : panBandZPos[i] = panBandZPosIn[i + 2];
917 49 : panBandZLev[i] = panBandZLevIn[i];
918 : }
919 : }
920 :
921 : // Get the type of the "z" variable, our target raster array.
922 182 : eDataType = eTypeIn;
923 :
924 182 : switch (eDataType)
925 : {
926 77 : case GDT_Byte:
927 77 : nc_datatype = NC_BYTE;
928 : // NC_UBYTE (unsigned byte) is only available for NC4.
929 77 : if (poNCDFDS->eFormat == NCDF_FORMAT_NC4)
930 3 : nc_datatype = NC_UBYTE;
931 77 : break;
932 7 : case GDT_Int8:
933 7 : nc_datatype = NC_BYTE;
934 7 : break;
935 11 : case GDT_Int16:
936 11 : nc_datatype = NC_SHORT;
937 11 : break;
938 24 : case GDT_Int32:
939 24 : nc_datatype = NC_INT;
940 24 : break;
941 13 : case GDT_Float32:
942 13 : nc_datatype = NC_FLOAT;
943 13 : break;
944 8 : case GDT_Float64:
945 8 : nc_datatype = NC_DOUBLE;
946 8 : break;
947 7 : case GDT_Int64:
948 7 : if (poNCDFDS->eFormat == NCDF_FORMAT_NC4)
949 : {
950 7 : nc_datatype = NC_INT64;
951 : }
952 : else
953 : {
954 0 : if (nBand == 1)
955 0 : CPLError(
956 : CE_Warning, CPLE_AppDefined,
957 : "Unsupported GDAL datatype %s, treat as NC_DOUBLE.",
958 : "Int64");
959 0 : nc_datatype = NC_DOUBLE;
960 0 : eDataType = GDT_Float64;
961 : }
962 7 : break;
963 7 : case GDT_UInt64:
964 7 : if (poNCDFDS->eFormat == NCDF_FORMAT_NC4)
965 : {
966 7 : nc_datatype = NC_UINT64;
967 : }
968 : else
969 : {
970 0 : if (nBand == 1)
971 0 : CPLError(
972 : CE_Warning, CPLE_AppDefined,
973 : "Unsupported GDAL datatype %s, treat as NC_DOUBLE.",
974 : "UInt64");
975 0 : nc_datatype = NC_DOUBLE;
976 0 : eDataType = GDT_Float64;
977 : }
978 7 : break;
979 6 : case GDT_UInt16:
980 6 : if (poNCDFDS->eFormat == NCDF_FORMAT_NC4)
981 : {
982 6 : nc_datatype = NC_USHORT;
983 6 : break;
984 : }
985 : [[fallthrough]];
986 : case GDT_UInt32:
987 6 : if (poNCDFDS->eFormat == NCDF_FORMAT_NC4)
988 : {
989 6 : nc_datatype = NC_UINT;
990 6 : break;
991 : }
992 : [[fallthrough]];
993 : default:
994 16 : if (nBand == 1)
995 8 : CPLError(CE_Warning, CPLE_AppDefined,
996 : "Unsupported GDAL datatype (%d), treat as NC_FLOAT.",
997 8 : static_cast<int>(eDataType));
998 16 : nc_datatype = NC_FLOAT;
999 16 : eDataType = GDT_Float32;
1000 16 : break;
1001 : }
1002 :
1003 : // Define the variable if necessary (if nZId == -1).
1004 182 : bool bDefineVar = false;
1005 :
1006 182 : if (nZId == -1)
1007 : {
1008 160 : bDefineVar = true;
1009 :
1010 : // Make sure we are in define mode.
1011 160 : static_cast<netCDFDataset *>(poDS)->SetDefineMode(true);
1012 :
1013 : char szTempPrivate[256 + 1];
1014 160 : const char *pszTemp = nullptr;
1015 160 : if (!pszBandName || EQUAL(pszBandName, ""))
1016 : {
1017 138 : snprintf(szTempPrivate, sizeof(szTempPrivate), "Band%d", nBand);
1018 138 : pszTemp = szTempPrivate;
1019 : }
1020 : else
1021 : {
1022 22 : pszTemp = pszBandName;
1023 : }
1024 :
1025 : int status;
1026 160 : if (nZDim > 2 && paDimIds != nullptr)
1027 : {
1028 5 : status =
1029 5 : nc_def_var(cdfid, pszTemp, nc_datatype, nZDim, paDimIds, &nZId);
1030 : }
1031 : else
1032 : {
1033 155 : int anBandDims[2] = {poNCDFDS->nYDimID, poNCDFDS->nXDimID};
1034 : status =
1035 155 : nc_def_var(cdfid, pszTemp, nc_datatype, 2, anBandDims, &nZId);
1036 : }
1037 160 : NCDF_ERR(status);
1038 160 : CPLDebug("GDAL_netCDF", "nc_def_var(%d,%s,%d) id=%d", cdfid, pszTemp,
1039 : nc_datatype, nZId);
1040 :
1041 160 : if (!pszLongName || EQUAL(pszLongName, ""))
1042 : {
1043 153 : snprintf(szTempPrivate, sizeof(szTempPrivate),
1044 : "GDAL Band Number %d", nBand);
1045 153 : pszTemp = szTempPrivate;
1046 : }
1047 : else
1048 : {
1049 7 : pszTemp = pszLongName;
1050 : }
1051 : status =
1052 160 : nc_put_att_text(cdfid, nZId, CF_LNG_NAME, strlen(pszTemp), pszTemp);
1053 160 : NCDF_ERR(status);
1054 :
1055 160 : poNCDFDS->DefVarDeflate(nZId, true);
1056 : }
1057 :
1058 : // For Byte data add signed/unsigned info.
1059 182 : if (eDataType == GDT_Byte || eDataType == GDT_Int8)
1060 : {
1061 84 : if (bDefineVar)
1062 : {
1063 : // Only add attributes if creating variable.
1064 : // For unsigned NC_BYTE (except NC4 format),
1065 : // add valid_range and _Unsigned ( defined in CF-1 and NUG ).
1066 76 : if (nc_datatype == NC_BYTE && poNCDFDS->eFormat != NCDF_FORMAT_NC4)
1067 : {
1068 73 : CPLDebug("GDAL_netCDF",
1069 : "adding valid_range attributes for Byte Band");
1070 73 : short l_adfValidRange[2] = {0, 0};
1071 : int status;
1072 73 : if (bSignedData || eDataType == GDT_Int8)
1073 : {
1074 7 : l_adfValidRange[0] = -128;
1075 7 : l_adfValidRange[1] = 127;
1076 7 : status =
1077 7 : nc_put_att_text(cdfid, nZId, "_Unsigned", 5, "false");
1078 : }
1079 : else
1080 : {
1081 66 : l_adfValidRange[0] = 0;
1082 66 : l_adfValidRange[1] = 255;
1083 : status =
1084 66 : nc_put_att_text(cdfid, nZId, "_Unsigned", 4, "true");
1085 : }
1086 73 : NCDF_ERR(status);
1087 73 : status = nc_put_att_short(cdfid, nZId, "valid_range", NC_SHORT,
1088 : 2, l_adfValidRange);
1089 73 : NCDF_ERR(status);
1090 : }
1091 : }
1092 : }
1093 :
1094 182 : if (nc_datatype != NC_BYTE && nc_datatype != NC_CHAR &&
1095 101 : nc_datatype != NC_UBYTE)
1096 : {
1097 : // Set default nodata.
1098 98 : bool bIgnored = false;
1099 : double dfNoData =
1100 98 : NCDFGetDefaultNoDataValue(cdfid, nZId, nc_datatype, bIgnored);
1101 : #ifdef NCDF_DEBUG
1102 : CPLDebug("GDAL_netCDF", "SetNoDataValue(%f) default", dfNoData);
1103 : #endif
1104 98 : netCDFRasterBand::SetNoDataValue(dfNoData);
1105 : }
1106 :
1107 182 : SetBlockSize();
1108 : }
1109 :
1110 : /************************************************************************/
1111 : /* ~netCDFRasterBand() */
1112 : /************************************************************************/
1113 :
1114 1308 : netCDFRasterBand::~netCDFRasterBand()
1115 : {
1116 654 : netCDFRasterBand::FlushCache(true);
1117 654 : CPLFree(panBandZPos);
1118 654 : CPLFree(panBandZLev);
1119 1308 : }
1120 :
1121 : /************************************************************************/
1122 : /* GetMetadata() */
1123 : /************************************************************************/
1124 :
1125 50 : char **netCDFRasterBand::GetMetadata(const char *pszDomain)
1126 : {
1127 50 : if (!m_bCreateMetadataFromOtherVarsDone)
1128 48 : CreateMetadataFromOtherVars();
1129 50 : return GDALPamRasterBand::GetMetadata(pszDomain);
1130 : }
1131 :
1132 : /************************************************************************/
1133 : /* GetMetadataItem() */
1134 : /************************************************************************/
1135 :
1136 546 : const char *netCDFRasterBand::GetMetadataItem(const char *pszName,
1137 : const char *pszDomain)
1138 : {
1139 546 : if (!m_bCreateMetadataFromOtherVarsDone &&
1140 530 : STARTS_WITH(pszName, "NETCDF_DIM_") &&
1141 1 : (!pszDomain || pszDomain[0] == 0))
1142 1 : CreateMetadataFromOtherVars();
1143 546 : return GDALPamRasterBand::GetMetadataItem(pszName, pszDomain);
1144 : }
1145 :
1146 : /************************************************************************/
1147 : /* SetMetadataItem() */
1148 : /************************************************************************/
1149 :
1150 7 : CPLErr netCDFRasterBand::SetMetadataItem(const char *pszName,
1151 : const char *pszValue,
1152 : const char *pszDomain)
1153 : {
1154 9 : if (GetAccess() == GA_Update &&
1155 9 : (pszDomain == nullptr || pszDomain[0] == '\0') && pszValue != nullptr)
1156 : {
1157 : // Same logic as in CopyMetadata()
1158 :
1159 2 : const char *const papszIgnoreBand[] = {
1160 : CF_ADD_OFFSET, CF_SCALE_FACTOR, "valid_range", "_Unsigned",
1161 : NCDF_FillValue, "coordinates", nullptr};
1162 : // Do not copy varname, stats, NETCDF_DIM_*, nodata
1163 : // and items in papszIgnoreBand.
1164 6 : if (STARTS_WITH(pszName, "NETCDF_VARNAME") ||
1165 2 : STARTS_WITH(pszName, "STATISTICS_") ||
1166 2 : STARTS_WITH(pszName, "NETCDF_DIM_") ||
1167 2 : STARTS_WITH(pszName, "missing_value") ||
1168 6 : STARTS_WITH(pszName, "_FillValue") ||
1169 2 : CSLFindString(papszIgnoreBand, pszName) != -1)
1170 : {
1171 : // do nothing
1172 : }
1173 : else
1174 : {
1175 2 : cpl::down_cast<netCDFDataset *>(poDS)->SetDefineMode(true);
1176 :
1177 2 : if (!NCDFPutAttr(cdfid, nZId, pszName, pszValue))
1178 2 : return CE_Failure;
1179 : }
1180 : }
1181 :
1182 5 : return GDALPamRasterBand::SetMetadataItem(pszName, pszValue, pszDomain);
1183 : }
1184 :
1185 : /************************************************************************/
1186 : /* SetMetadata() */
1187 : /************************************************************************/
1188 :
1189 2 : CPLErr netCDFRasterBand::SetMetadata(char **papszMD, const char *pszDomain)
1190 : {
1191 4 : if (GetAccess() == GA_Update &&
1192 2 : (pszDomain == nullptr || pszDomain[0] == '\0'))
1193 : {
1194 : // We don't handle metadata item removal for now
1195 4 : for (const char *const *papszIter = papszMD; papszIter && *papszIter;
1196 : ++papszIter)
1197 : {
1198 2 : char *pszName = nullptr;
1199 2 : const char *pszValue = CPLParseNameValue(*papszIter, &pszName);
1200 2 : if (pszName && pszValue)
1201 2 : SetMetadataItem(pszName, pszValue);
1202 2 : CPLFree(pszName);
1203 : }
1204 : }
1205 2 : return GDALPamRasterBand::SetMetadata(papszMD, pszDomain);
1206 : }
1207 :
1208 : /************************************************************************/
1209 : /* GetOffset() */
1210 : /************************************************************************/
1211 50 : double netCDFRasterBand::GetOffset(int *pbSuccess)
1212 : {
1213 50 : if (pbSuccess != nullptr)
1214 45 : *pbSuccess = static_cast<int>(m_bHaveOffset);
1215 :
1216 50 : return m_dfOffset;
1217 : }
1218 :
1219 : /************************************************************************/
1220 : /* SetOffset() */
1221 : /************************************************************************/
1222 1 : CPLErr netCDFRasterBand::SetOffset(double dfNewOffset)
1223 : {
1224 2 : CPLMutexHolderD(&hNCMutex);
1225 :
1226 : // Write value if in update mode.
1227 1 : if (poDS->GetAccess() == GA_Update)
1228 : {
1229 : // Make sure we are in define mode.
1230 1 : static_cast<netCDFDataset *>(poDS)->SetDefineMode(true);
1231 :
1232 1 : const int status = nc_put_att_double(cdfid, nZId, CF_ADD_OFFSET,
1233 : NC_DOUBLE, 1, &dfNewOffset);
1234 :
1235 1 : NCDF_ERR(status);
1236 1 : if (status == NC_NOERR)
1237 : {
1238 1 : SetOffsetNoUpdate(dfNewOffset);
1239 1 : return CE_None;
1240 : }
1241 :
1242 0 : return CE_Failure;
1243 : }
1244 :
1245 0 : SetOffsetNoUpdate(dfNewOffset);
1246 0 : return CE_None;
1247 : }
1248 :
1249 : /************************************************************************/
1250 : /* SetOffsetNoUpdate() */
1251 : /************************************************************************/
1252 17 : void netCDFRasterBand::SetOffsetNoUpdate(double dfVal)
1253 : {
1254 17 : m_dfOffset = dfVal;
1255 17 : m_bHaveOffset = true;
1256 17 : }
1257 :
1258 : /************************************************************************/
1259 : /* GetScale() */
1260 : /************************************************************************/
1261 50 : double netCDFRasterBand::GetScale(int *pbSuccess)
1262 : {
1263 50 : if (pbSuccess != nullptr)
1264 45 : *pbSuccess = static_cast<int>(m_bHaveScale);
1265 :
1266 50 : return m_dfScale;
1267 : }
1268 :
1269 : /************************************************************************/
1270 : /* SetScale() */
1271 : /************************************************************************/
1272 1 : CPLErr netCDFRasterBand::SetScale(double dfNewScale)
1273 : {
1274 2 : CPLMutexHolderD(&hNCMutex);
1275 :
1276 : // Write value if in update mode.
1277 1 : if (poDS->GetAccess() == GA_Update)
1278 : {
1279 : // Make sure we are in define mode.
1280 1 : static_cast<netCDFDataset *>(poDS)->SetDefineMode(true);
1281 :
1282 1 : const int status = nc_put_att_double(cdfid, nZId, CF_SCALE_FACTOR,
1283 : NC_DOUBLE, 1, &dfNewScale);
1284 :
1285 1 : NCDF_ERR(status);
1286 1 : if (status == NC_NOERR)
1287 : {
1288 1 : SetScaleNoUpdate(dfNewScale);
1289 1 : return CE_None;
1290 : }
1291 :
1292 0 : return CE_Failure;
1293 : }
1294 :
1295 0 : SetScaleNoUpdate(dfNewScale);
1296 0 : return CE_None;
1297 : }
1298 :
1299 : /************************************************************************/
1300 : /* SetScaleNoUpdate() */
1301 : /************************************************************************/
1302 21 : void netCDFRasterBand::SetScaleNoUpdate(double dfVal)
1303 : {
1304 21 : m_dfScale = dfVal;
1305 21 : m_bHaveScale = true;
1306 21 : }
1307 :
1308 : /************************************************************************/
1309 : /* GetUnitType() */
1310 : /************************************************************************/
1311 :
1312 22 : const char *netCDFRasterBand::GetUnitType()
1313 :
1314 : {
1315 22 : if (!m_osUnitType.empty())
1316 6 : return m_osUnitType;
1317 :
1318 16 : return GDALRasterBand::GetUnitType();
1319 : }
1320 :
1321 : /************************************************************************/
1322 : /* SetUnitType() */
1323 : /************************************************************************/
1324 :
1325 1 : CPLErr netCDFRasterBand::SetUnitType(const char *pszNewValue)
1326 :
1327 : {
1328 2 : CPLMutexHolderD(&hNCMutex);
1329 :
1330 2 : const std::string osUnitType = (pszNewValue != nullptr ? pszNewValue : "");
1331 :
1332 1 : if (!osUnitType.empty())
1333 : {
1334 : // Write value if in update mode.
1335 1 : if (poDS->GetAccess() == GA_Update)
1336 : {
1337 : // Make sure we are in define mode.
1338 1 : static_cast<netCDFDataset *>(poDS)->SetDefineMode(TRUE);
1339 :
1340 1 : const int status = nc_put_att_text(
1341 : cdfid, nZId, CF_UNITS, osUnitType.size(), osUnitType.c_str());
1342 :
1343 1 : NCDF_ERR(status);
1344 1 : if (status == NC_NOERR)
1345 : {
1346 1 : SetUnitTypeNoUpdate(pszNewValue);
1347 1 : return CE_None;
1348 : }
1349 :
1350 0 : return CE_Failure;
1351 : }
1352 : }
1353 :
1354 0 : SetUnitTypeNoUpdate(pszNewValue);
1355 :
1356 0 : return CE_None;
1357 : }
1358 :
1359 : /************************************************************************/
1360 : /* SetUnitTypeNoUpdate() */
1361 : /************************************************************************/
1362 :
1363 473 : void netCDFRasterBand::SetUnitTypeNoUpdate(const char *pszNewValue)
1364 : {
1365 473 : m_osUnitType = (pszNewValue != nullptr ? pszNewValue : "");
1366 473 : }
1367 :
1368 : /************************************************************************/
1369 : /* GetNoDataValue() */
1370 : /************************************************************************/
1371 :
1372 155 : double netCDFRasterBand::GetNoDataValue(int *pbSuccess)
1373 :
1374 : {
1375 155 : if (m_bNoDataSetAsInt64)
1376 : {
1377 0 : if (pbSuccess)
1378 0 : *pbSuccess = TRUE;
1379 0 : return GDALGetNoDataValueCastToDouble(m_nNodataValueInt64);
1380 : }
1381 :
1382 155 : if (m_bNoDataSetAsUInt64)
1383 : {
1384 0 : if (pbSuccess)
1385 0 : *pbSuccess = TRUE;
1386 0 : return GDALGetNoDataValueCastToDouble(m_nNodataValueUInt64);
1387 : }
1388 :
1389 155 : if (m_bNoDataSet)
1390 : {
1391 118 : if (pbSuccess)
1392 102 : *pbSuccess = TRUE;
1393 118 : return m_dfNoDataValue;
1394 : }
1395 :
1396 37 : return GDALPamRasterBand::GetNoDataValue(pbSuccess);
1397 : }
1398 :
1399 : /************************************************************************/
1400 : /* GetNoDataValueAsInt64() */
1401 : /************************************************************************/
1402 :
1403 4 : int64_t netCDFRasterBand::GetNoDataValueAsInt64(int *pbSuccess)
1404 :
1405 : {
1406 4 : if (m_bNoDataSetAsInt64)
1407 : {
1408 4 : if (pbSuccess)
1409 4 : *pbSuccess = TRUE;
1410 :
1411 4 : return m_nNodataValueInt64;
1412 : }
1413 :
1414 0 : return GDALPamRasterBand::GetNoDataValueAsInt64(pbSuccess);
1415 : }
1416 :
1417 : /************************************************************************/
1418 : /* GetNoDataValueAsUInt64() */
1419 : /************************************************************************/
1420 :
1421 4 : uint64_t netCDFRasterBand::GetNoDataValueAsUInt64(int *pbSuccess)
1422 :
1423 : {
1424 4 : if (m_bNoDataSetAsUInt64)
1425 : {
1426 4 : if (pbSuccess)
1427 4 : *pbSuccess = TRUE;
1428 :
1429 4 : return m_nNodataValueUInt64;
1430 : }
1431 :
1432 0 : return GDALPamRasterBand::GetNoDataValueAsUInt64(pbSuccess);
1433 : }
1434 :
1435 : /************************************************************************/
1436 : /* SetNoDataValue() */
1437 : /************************************************************************/
1438 :
1439 134 : CPLErr netCDFRasterBand::SetNoDataValue(double dfNoData)
1440 :
1441 : {
1442 268 : CPLMutexHolderD(&hNCMutex);
1443 :
1444 : // If already set to new value, don't do anything.
1445 134 : if (m_bNoDataSet && CPLIsEqual(dfNoData, m_dfNoDataValue))
1446 19 : return CE_None;
1447 :
1448 : // Write value if in update mode.
1449 115 : if (poDS->GetAccess() == GA_Update)
1450 : {
1451 : // netcdf-4 does not allow to set _FillValue after leaving define mode,
1452 : // but it is ok if variable has not been written to, so only print
1453 : // debug. See bug #4484.
1454 125 : if (m_bNoDataSet &&
1455 10 : !reinterpret_cast<netCDFDataset *>(poDS)->GetDefineMode())
1456 : {
1457 0 : CPLDebug("GDAL_netCDF",
1458 : "Setting NoDataValue to %.17g (previously set to %.17g) "
1459 : "but file is no longer in define mode (id #%d, band #%d)",
1460 : dfNoData, m_dfNoDataValue, cdfid, nBand);
1461 : }
1462 : #ifdef NCDF_DEBUG
1463 : else
1464 : {
1465 : CPLDebug("GDAL_netCDF",
1466 : "Setting NoDataValue to %.17g (id #%d, band #%d)",
1467 : dfNoData, cdfid, nBand);
1468 : }
1469 : #endif
1470 : // Make sure we are in define mode.
1471 115 : reinterpret_cast<netCDFDataset *>(poDS)->SetDefineMode(true);
1472 :
1473 : int status;
1474 115 : if (eDataType == GDT_Byte)
1475 : {
1476 6 : if (bSignedData)
1477 : {
1478 0 : signed char cNoDataValue = static_cast<signed char>(dfNoData);
1479 0 : status = nc_put_att_schar(cdfid, nZId, NCDF_FillValue,
1480 : nc_datatype, 1, &cNoDataValue);
1481 : }
1482 : else
1483 : {
1484 6 : const unsigned char ucNoDataValue =
1485 6 : static_cast<unsigned char>(dfNoData);
1486 6 : status = nc_put_att_uchar(cdfid, nZId, NCDF_FillValue,
1487 : nc_datatype, 1, &ucNoDataValue);
1488 : }
1489 : }
1490 109 : else if (eDataType == GDT_Int16)
1491 : {
1492 14 : short nsNoDataValue = static_cast<short>(dfNoData);
1493 14 : status = nc_put_att_short(cdfid, nZId, NCDF_FillValue, nc_datatype,
1494 : 1, &nsNoDataValue);
1495 : }
1496 95 : else if (eDataType == GDT_Int32)
1497 : {
1498 27 : int nNoDataValue = static_cast<int>(dfNoData);
1499 27 : status = nc_put_att_int(cdfid, nZId, NCDF_FillValue, nc_datatype, 1,
1500 : &nNoDataValue);
1501 : }
1502 68 : else if (eDataType == GDT_Float32)
1503 : {
1504 31 : float fNoDataValue = static_cast<float>(dfNoData);
1505 31 : status = nc_put_att_float(cdfid, nZId, NCDF_FillValue, nc_datatype,
1506 : 1, &fNoDataValue);
1507 : }
1508 37 : else if (eDataType == GDT_UInt16 &&
1509 6 : reinterpret_cast<netCDFDataset *>(poDS)->eFormat ==
1510 : NCDF_FORMAT_NC4)
1511 : {
1512 6 : unsigned short usNoDataValue =
1513 6 : static_cast<unsigned short>(dfNoData);
1514 6 : status = nc_put_att_ushort(cdfid, nZId, NCDF_FillValue, nc_datatype,
1515 6 : 1, &usNoDataValue);
1516 : }
1517 31 : else if (eDataType == GDT_UInt32 &&
1518 7 : reinterpret_cast<netCDFDataset *>(poDS)->eFormat ==
1519 : NCDF_FORMAT_NC4)
1520 : {
1521 7 : unsigned int unNoDataValue = static_cast<unsigned int>(dfNoData);
1522 7 : status = nc_put_att_uint(cdfid, nZId, NCDF_FillValue, nc_datatype,
1523 7 : 1, &unNoDataValue);
1524 : }
1525 : else
1526 : {
1527 24 : status = nc_put_att_double(cdfid, nZId, NCDF_FillValue, nc_datatype,
1528 : 1, &dfNoData);
1529 : }
1530 :
1531 115 : NCDF_ERR(status);
1532 :
1533 : // Update status if write worked.
1534 115 : if (status == NC_NOERR)
1535 : {
1536 115 : SetNoDataValueNoUpdate(dfNoData);
1537 115 : return CE_None;
1538 : }
1539 :
1540 0 : return CE_Failure;
1541 : }
1542 :
1543 0 : SetNoDataValueNoUpdate(dfNoData);
1544 0 : return CE_None;
1545 : }
1546 :
1547 : /************************************************************************/
1548 : /* SetNoDataValueNoUpdate() */
1549 : /************************************************************************/
1550 :
1551 430 : void netCDFRasterBand::SetNoDataValueNoUpdate(double dfNoData)
1552 : {
1553 430 : m_dfNoDataValue = dfNoData;
1554 430 : m_bNoDataSet = true;
1555 430 : m_bNoDataSetAsInt64 = false;
1556 430 : m_bNoDataSetAsUInt64 = false;
1557 430 : }
1558 :
1559 : /************************************************************************/
1560 : /* SetNoDataValueAsInt64() */
1561 : /************************************************************************/
1562 :
1563 3 : CPLErr netCDFRasterBand::SetNoDataValueAsInt64(int64_t nNoData)
1564 :
1565 : {
1566 6 : CPLMutexHolderD(&hNCMutex);
1567 :
1568 : // If already set to new value, don't do anything.
1569 3 : if (m_bNoDataSetAsInt64 && nNoData == m_nNodataValueInt64)
1570 0 : return CE_None;
1571 :
1572 : // Write value if in update mode.
1573 3 : if (poDS->GetAccess() == GA_Update)
1574 : {
1575 : // netcdf-4 does not allow to set NCDF_FillValue after leaving define mode,
1576 : // but it is ok if variable has not been written to, so only print
1577 : // debug. See bug #4484.
1578 3 : if (m_bNoDataSetAsInt64 &&
1579 0 : !reinterpret_cast<netCDFDataset *>(poDS)->GetDefineMode())
1580 : {
1581 0 : CPLDebug("GDAL_netCDF",
1582 : "Setting NoDataValue to " CPL_FRMT_GIB
1583 : " (previously set to " CPL_FRMT_GIB ") "
1584 : "but file is no longer in define mode (id #%d, band #%d)",
1585 : static_cast<GIntBig>(nNoData),
1586 0 : static_cast<GIntBig>(m_nNodataValueInt64), cdfid, nBand);
1587 : }
1588 : #ifdef NCDF_DEBUG
1589 : else
1590 : {
1591 : CPLDebug("GDAL_netCDF",
1592 : "Setting NoDataValue to " CPL_FRMT_GIB
1593 : " (id #%d, band #%d)",
1594 : static_cast<GIntBig>(nNoData), cdfid, nBand);
1595 : }
1596 : #endif
1597 : // Make sure we are in define mode.
1598 3 : reinterpret_cast<netCDFDataset *>(poDS)->SetDefineMode(true);
1599 :
1600 : int status;
1601 3 : if (eDataType == GDT_Int64 &&
1602 3 : reinterpret_cast<netCDFDataset *>(poDS)->eFormat == NCDF_FORMAT_NC4)
1603 : {
1604 3 : long long tmp = static_cast<long long>(nNoData);
1605 3 : status = nc_put_att_longlong(cdfid, nZId, NCDF_FillValue,
1606 3 : nc_datatype, 1, &tmp);
1607 : }
1608 : else
1609 : {
1610 0 : double dfNoData = static_cast<double>(nNoData);
1611 0 : status = nc_put_att_double(cdfid, nZId, NCDF_FillValue, nc_datatype,
1612 : 1, &dfNoData);
1613 : }
1614 :
1615 3 : NCDF_ERR(status);
1616 :
1617 : // Update status if write worked.
1618 3 : if (status == NC_NOERR)
1619 : {
1620 3 : SetNoDataValueNoUpdate(nNoData);
1621 3 : return CE_None;
1622 : }
1623 :
1624 0 : return CE_Failure;
1625 : }
1626 :
1627 0 : SetNoDataValueNoUpdate(nNoData);
1628 0 : return CE_None;
1629 : }
1630 :
1631 : /************************************************************************/
1632 : /* SetNoDataValueNoUpdate() */
1633 : /************************************************************************/
1634 :
1635 11 : void netCDFRasterBand::SetNoDataValueNoUpdate(int64_t nNoData)
1636 : {
1637 11 : m_nNodataValueInt64 = nNoData;
1638 11 : m_bNoDataSet = false;
1639 11 : m_bNoDataSetAsInt64 = true;
1640 11 : m_bNoDataSetAsUInt64 = false;
1641 11 : }
1642 :
1643 : /************************************************************************/
1644 : /* SetNoDataValueAsUInt64() */
1645 : /************************************************************************/
1646 :
1647 3 : CPLErr netCDFRasterBand::SetNoDataValueAsUInt64(uint64_t nNoData)
1648 :
1649 : {
1650 6 : CPLMutexHolderD(&hNCMutex);
1651 :
1652 : // If already set to new value, don't do anything.
1653 3 : if (m_bNoDataSetAsUInt64 && nNoData == m_nNodataValueUInt64)
1654 0 : return CE_None;
1655 :
1656 : // Write value if in update mode.
1657 3 : if (poDS->GetAccess() == GA_Update)
1658 : {
1659 : // netcdf-4 does not allow to set _FillValue after leaving define mode,
1660 : // but it is ok if variable has not been written to, so only print
1661 : // debug. See bug #4484.
1662 3 : if (m_bNoDataSetAsUInt64 &&
1663 0 : !reinterpret_cast<netCDFDataset *>(poDS)->GetDefineMode())
1664 : {
1665 0 : CPLDebug("GDAL_netCDF",
1666 : "Setting NoDataValue to " CPL_FRMT_GUIB
1667 : " (previously set to " CPL_FRMT_GUIB ") "
1668 : "but file is no longer in define mode (id #%d, band #%d)",
1669 : static_cast<GUIntBig>(nNoData),
1670 0 : static_cast<GUIntBig>(m_nNodataValueUInt64), cdfid, nBand);
1671 : }
1672 : #ifdef NCDF_DEBUG
1673 : else
1674 : {
1675 : CPLDebug("GDAL_netCDF",
1676 : "Setting NoDataValue to " CPL_FRMT_GUIB
1677 : " (id #%d, band #%d)",
1678 : static_cast<GUIntBig>(nNoData), cdfid, nBand);
1679 : }
1680 : #endif
1681 : // Make sure we are in define mode.
1682 3 : reinterpret_cast<netCDFDataset *>(poDS)->SetDefineMode(true);
1683 :
1684 : int status;
1685 3 : if (eDataType == GDT_UInt64 &&
1686 3 : reinterpret_cast<netCDFDataset *>(poDS)->eFormat == NCDF_FORMAT_NC4)
1687 : {
1688 3 : unsigned long long tmp = static_cast<long long>(nNoData);
1689 3 : status = nc_put_att_ulonglong(cdfid, nZId, NCDF_FillValue,
1690 3 : nc_datatype, 1, &tmp);
1691 : }
1692 : else
1693 : {
1694 0 : double dfNoData = static_cast<double>(nNoData);
1695 0 : status = nc_put_att_double(cdfid, nZId, NCDF_FillValue, nc_datatype,
1696 : 1, &dfNoData);
1697 : }
1698 :
1699 3 : NCDF_ERR(status);
1700 :
1701 : // Update status if write worked.
1702 3 : if (status == NC_NOERR)
1703 : {
1704 3 : SetNoDataValueNoUpdate(nNoData);
1705 3 : return CE_None;
1706 : }
1707 :
1708 0 : return CE_Failure;
1709 : }
1710 :
1711 0 : SetNoDataValueNoUpdate(nNoData);
1712 0 : return CE_None;
1713 : }
1714 :
1715 : /************************************************************************/
1716 : /* SetNoDataValueNoUpdate() */
1717 : /************************************************************************/
1718 :
1719 10 : void netCDFRasterBand::SetNoDataValueNoUpdate(uint64_t nNoData)
1720 : {
1721 10 : m_nNodataValueUInt64 = nNoData;
1722 10 : m_bNoDataSet = false;
1723 10 : m_bNoDataSetAsInt64 = false;
1724 10 : m_bNoDataSetAsUInt64 = true;
1725 10 : }
1726 :
1727 : /************************************************************************/
1728 : /* DeleteNoDataValue() */
1729 : /************************************************************************/
1730 :
1731 : #ifdef notdef
1732 : CPLErr netCDFRasterBand::DeleteNoDataValue()
1733 :
1734 : {
1735 : CPLMutexHolderD(&hNCMutex);
1736 :
1737 : if (!bNoDataSet)
1738 : return CE_None;
1739 :
1740 : // Write value if in update mode.
1741 : if (poDS->GetAccess() == GA_Update)
1742 : {
1743 : // Make sure we are in define mode.
1744 : static_cast<netCDFDataset *>(poDS)->SetDefineMode(true);
1745 :
1746 : status = nc_del_att(cdfid, nZId, NCDF_FillValue);
1747 :
1748 : NCDF_ERR(status);
1749 :
1750 : // Update status if write worked.
1751 : if (status == NC_NOERR)
1752 : {
1753 : dfNoDataValue = 0.0;
1754 : bNoDataSet = false;
1755 : return CE_None;
1756 : }
1757 :
1758 : return CE_Failure;
1759 : }
1760 :
1761 : dfNoDataValue = 0.0;
1762 : bNoDataSet = false;
1763 : return CE_None;
1764 : }
1765 : #endif
1766 :
1767 : /************************************************************************/
1768 : /* SerializeToXML() */
1769 : /************************************************************************/
1770 :
1771 5 : CPLXMLNode *netCDFRasterBand::SerializeToXML(const char * /* pszUnused */)
1772 : {
1773 : // Overridden from GDALPamDataset to add only band histogram
1774 : // and statistics. See bug #4244.
1775 5 : if (psPam == nullptr)
1776 0 : return nullptr;
1777 :
1778 : // Setup root node and attributes.
1779 : CPLXMLNode *psTree =
1780 5 : CPLCreateXMLNode(nullptr, CXT_Element, "PAMRasterBand");
1781 :
1782 5 : if (GetBand() > 0)
1783 : {
1784 10 : CPLString oFmt;
1785 5 : CPLSetXMLValue(psTree, "#band", oFmt.Printf("%d", GetBand()));
1786 : }
1787 :
1788 : // Histograms.
1789 5 : if (psPam->psSavedHistograms != nullptr)
1790 1 : CPLAddXMLChild(psTree, CPLCloneXMLTree(psPam->psSavedHistograms));
1791 :
1792 : // Metadata (statistics only).
1793 5 : GDALMultiDomainMetadata oMDMDStats;
1794 5 : const char *papszMDStats[] = {"STATISTICS_MINIMUM", "STATISTICS_MAXIMUM",
1795 : "STATISTICS_MEAN", "STATISTICS_STDDEV",
1796 : nullptr};
1797 25 : for (int i = 0; i < CSLCount(papszMDStats); i++)
1798 : {
1799 20 : const char *pszMDI = GetMetadataItem(papszMDStats[i]);
1800 20 : if (pszMDI)
1801 4 : oMDMDStats.SetMetadataItem(papszMDStats[i], pszMDI);
1802 : }
1803 5 : CPLXMLNode *psMD = oMDMDStats.Serialize();
1804 :
1805 5 : if (psMD != nullptr)
1806 : {
1807 1 : if (psMD->psChild == nullptr)
1808 0 : CPLDestroyXMLNode(psMD);
1809 : else
1810 1 : CPLAddXMLChild(psTree, psMD);
1811 : }
1812 :
1813 : // We don't want to return anything if we had no metadata to attach.
1814 5 : if (psTree->psChild == nullptr || psTree->psChild->psNext == nullptr)
1815 : {
1816 3 : CPLDestroyXMLNode(psTree);
1817 3 : psTree = nullptr;
1818 : }
1819 :
1820 5 : return psTree;
1821 : }
1822 :
1823 : /************************************************************************/
1824 : /* Get1DVariableIndexedByDimension() */
1825 : /************************************************************************/
1826 :
1827 79 : static int Get1DVariableIndexedByDimension(int cdfid, int nDimId,
1828 : const char *pszDimName,
1829 : bool bVerboseError, int *pnGroupID)
1830 : {
1831 79 : *pnGroupID = -1;
1832 79 : int nVarID = -1;
1833 : // First try to find a variable whose name is identical to the dimension
1834 : // name, and check that it is indeed indexed by this dimension
1835 79 : if (NCDFResolveVar(cdfid, pszDimName, pnGroupID, &nVarID) == CE_None)
1836 : {
1837 65 : int nDimCountOfVariable = 0;
1838 65 : nc_inq_varndims(*pnGroupID, nVarID, &nDimCountOfVariable);
1839 65 : if (nDimCountOfVariable == 1)
1840 : {
1841 65 : int nDimIdOfVariable = -1;
1842 65 : nc_inq_vardimid(*pnGroupID, nVarID, &nDimIdOfVariable);
1843 65 : if (nDimIdOfVariable == nDimId)
1844 : {
1845 65 : return nVarID;
1846 : }
1847 : }
1848 : }
1849 :
1850 : // Otherwise iterate over the variables to find potential candidates
1851 : // TODO: should be modified to search also in other groups using the same
1852 : // logic than in NCDFResolveVar(), but maybe not needed if it's a
1853 : // very rare case? and I think this is not CF compliant.
1854 14 : int nvars = 0;
1855 14 : CPL_IGNORE_RET_VAL(nc_inq(cdfid, nullptr, &nvars, nullptr, nullptr));
1856 :
1857 14 : int nCountCandidateVars = 0;
1858 14 : int nCandidateVarID = -1;
1859 65 : for (int k = 0; k < nvars; k++)
1860 : {
1861 51 : int nDimCountOfVariable = 0;
1862 51 : nc_inq_varndims(cdfid, k, &nDimCountOfVariable);
1863 51 : if (nDimCountOfVariable == 1)
1864 : {
1865 27 : int nDimIdOfVariable = -1;
1866 27 : nc_inq_vardimid(cdfid, k, &nDimIdOfVariable);
1867 27 : if (nDimIdOfVariable == nDimId)
1868 : {
1869 7 : nCountCandidateVars++;
1870 7 : nCandidateVarID = k;
1871 : }
1872 : }
1873 : }
1874 14 : if (nCountCandidateVars > 1)
1875 : {
1876 1 : if (bVerboseError)
1877 : {
1878 1 : CPLError(CE_Warning, CPLE_AppDefined,
1879 : "Several 1D variables are indexed by dimension %s",
1880 : pszDimName);
1881 : }
1882 1 : *pnGroupID = -1;
1883 1 : return -1;
1884 : }
1885 13 : else if (nCandidateVarID < 0)
1886 : {
1887 8 : if (bVerboseError)
1888 : {
1889 8 : CPLError(CE_Warning, CPLE_AppDefined,
1890 : "No 1D variable is indexed by dimension %s", pszDimName);
1891 : }
1892 : }
1893 13 : *pnGroupID = cdfid;
1894 13 : return nCandidateVarID;
1895 : }
1896 :
1897 : /************************************************************************/
1898 : /* CreateMetadataFromAttributes() */
1899 : /************************************************************************/
1900 :
1901 472 : void netCDFRasterBand::CreateMetadataFromAttributes()
1902 : {
1903 472 : char szVarName[NC_MAX_NAME + 1] = {};
1904 472 : int status = nc_inq_varname(cdfid, nZId, szVarName);
1905 472 : NCDF_ERR(status);
1906 :
1907 472 : GDALPamRasterBand::SetMetadataItem("NETCDF_VARNAME", szVarName);
1908 :
1909 : // Get attribute metadata.
1910 472 : int nAtt = 0;
1911 472 : NCDF_ERR(nc_inq_varnatts(cdfid, nZId, &nAtt));
1912 :
1913 2018 : for (int i = 0; i < nAtt; i++)
1914 : {
1915 1546 : char szMetaName[NC_MAX_NAME + 1] = {};
1916 1546 : status = nc_inq_attname(cdfid, nZId, i, szMetaName);
1917 1546 : if (status != NC_NOERR)
1918 12 : continue;
1919 :
1920 1546 : if (GDALPamRasterBand::GetMetadataItem(szMetaName) != nullptr)
1921 : {
1922 12 : continue;
1923 : }
1924 :
1925 1534 : char *pszMetaValue = nullptr;
1926 1534 : if (NCDFGetAttr(cdfid, nZId, szMetaName, &pszMetaValue) == CE_None)
1927 : {
1928 1534 : GDALPamRasterBand::SetMetadataItem(szMetaName, pszMetaValue);
1929 : }
1930 : else
1931 : {
1932 0 : CPLDebug("GDAL_netCDF", "invalid Band metadata %s", szMetaName);
1933 : }
1934 :
1935 1534 : if (pszMetaValue)
1936 : {
1937 1534 : CPLFree(pszMetaValue);
1938 1534 : pszMetaValue = nullptr;
1939 : }
1940 : }
1941 472 : }
1942 :
1943 : /************************************************************************/
1944 : /* CreateMetadataFromOtherVars() */
1945 : /************************************************************************/
1946 :
1947 49 : void netCDFRasterBand::CreateMetadataFromOtherVars()
1948 :
1949 : {
1950 49 : CPLAssert(!m_bCreateMetadataFromOtherVarsDone);
1951 49 : m_bCreateMetadataFromOtherVarsDone = true;
1952 :
1953 49 : netCDFDataset *l_poDS = reinterpret_cast<netCDFDataset *>(poDS);
1954 49 : const int nPamFlagsBackup = l_poDS->nPamFlags;
1955 :
1956 : // Compute all dimensions from Band number and save in Metadata.
1957 49 : int nd = 0;
1958 49 : nc_inq_varndims(cdfid, nZId, &nd);
1959 : // Compute multidimention band position.
1960 : //
1961 : // BandPosition = (Total - sum(PastBandLevels) - 1)/sum(remainingLevels)
1962 : // if Data[2,3,4,x,y]
1963 : //
1964 : // BandPos0 = (nBand) / (3*4)
1965 : // BandPos1 = (nBand - BandPos0*(3*4)) / (4)
1966 : // BandPos2 = (nBand - BandPos0*(3*4)) % (4)
1967 :
1968 49 : int Sum = 1;
1969 49 : if (nd == 3)
1970 : {
1971 5 : Sum *= panBandZLev[0];
1972 : }
1973 :
1974 : // Loop over non-spatial dimensions.
1975 49 : int Taken = 0;
1976 :
1977 89 : for (int i = 0; i < nd - 2; i++)
1978 : {
1979 : int result;
1980 40 : if (i != nd - 2 - 1)
1981 : {
1982 18 : Sum = 1;
1983 37 : for (int j = i + 1; j < nd - 2; j++)
1984 : {
1985 19 : Sum *= panBandZLev[j];
1986 : }
1987 18 : result = static_cast<int>((nLevel - Taken) / Sum);
1988 : }
1989 : else
1990 : {
1991 22 : result = static_cast<int>((nLevel - Taken) % Sum);
1992 : }
1993 :
1994 40 : char szName[NC_MAX_NAME + 1] = {};
1995 40 : snprintf(szName, sizeof(szName), "%s",
1996 40 : l_poDS->papszDimName[l_poDS->m_anDimIds[panBandZPos[i]]]);
1997 :
1998 : char szMetaName[NC_MAX_NAME + 1 + 32];
1999 40 : snprintf(szMetaName, sizeof(szMetaName), "NETCDF_DIM_%s", szName);
2000 :
2001 40 : const int nGroupID = l_poDS->m_anExtraDimGroupIds[i];
2002 40 : const int nVarID = l_poDS->m_anExtraDimVarIds[i];
2003 40 : if (nVarID < 0)
2004 : {
2005 2 : GDALPamRasterBand::SetMetadataItem(szMetaName,
2006 : CPLSPrintf("%d", result + 1));
2007 : }
2008 : else
2009 : {
2010 : // TODO: Make sure all the status checks make sense.
2011 :
2012 38 : nc_type nVarType = NC_NAT;
2013 38 : /* status = */ nc_inq_vartype(nGroupID, nVarID, &nVarType);
2014 :
2015 38 : int nDims = 0;
2016 38 : /* status = */ nc_inq_varndims(nGroupID, nVarID, &nDims);
2017 :
2018 38 : char szMetaTemp[256] = {};
2019 38 : if (nDims == 1)
2020 : {
2021 38 : size_t count[1] = {1};
2022 38 : size_t start[1] = {static_cast<size_t>(result)};
2023 :
2024 38 : switch (nVarType)
2025 : {
2026 0 : case NC_BYTE:
2027 : // TODO: Check for signed/unsigned byte.
2028 : signed char cData;
2029 0 : /* status = */ nc_get_vara_schar(nGroupID, nVarID,
2030 : start, count, &cData);
2031 0 : snprintf(szMetaTemp, sizeof(szMetaTemp), "%d", cData);
2032 0 : break;
2033 0 : case NC_SHORT:
2034 : short sData;
2035 0 : /* status = */ nc_get_vara_short(nGroupID, nVarID,
2036 : start, count, &sData);
2037 0 : snprintf(szMetaTemp, sizeof(szMetaTemp), "%d", sData);
2038 0 : break;
2039 19 : case NC_INT:
2040 : {
2041 : int nData;
2042 19 : /* status = */ nc_get_vara_int(nGroupID, nVarID, start,
2043 : count, &nData);
2044 19 : snprintf(szMetaTemp, sizeof(szMetaTemp), "%d", nData);
2045 19 : break;
2046 : }
2047 0 : case NC_FLOAT:
2048 : float fData;
2049 0 : /* status = */ nc_get_vara_float(nGroupID, nVarID,
2050 : start, count, &fData);
2051 0 : CPLsnprintf(szMetaTemp, sizeof(szMetaTemp), "%.8g",
2052 : fData);
2053 0 : break;
2054 18 : case NC_DOUBLE:
2055 : double dfData;
2056 18 : /* status = */ nc_get_vara_double(
2057 : nGroupID, nVarID, start, count, &dfData);
2058 18 : CPLsnprintf(szMetaTemp, sizeof(szMetaTemp), "%.16g",
2059 : dfData);
2060 18 : break;
2061 0 : case NC_UBYTE:
2062 : unsigned char ucData;
2063 0 : /* status = */ nc_get_vara_uchar(nGroupID, nVarID,
2064 : start, count, &ucData);
2065 0 : snprintf(szMetaTemp, sizeof(szMetaTemp), "%u", ucData);
2066 0 : break;
2067 0 : case NC_USHORT:
2068 : unsigned short usData;
2069 0 : /* status = */ nc_get_vara_ushort(
2070 : nGroupID, nVarID, start, count, &usData);
2071 0 : snprintf(szMetaTemp, sizeof(szMetaTemp), "%u", usData);
2072 0 : break;
2073 0 : case NC_UINT:
2074 : {
2075 : unsigned int unData;
2076 0 : /* status = */ nc_get_vara_uint(nGroupID, nVarID, start,
2077 : count, &unData);
2078 0 : snprintf(szMetaTemp, sizeof(szMetaTemp), "%u", unData);
2079 0 : break;
2080 : }
2081 1 : case NC_INT64:
2082 : {
2083 : long long nData;
2084 1 : /* status = */ nc_get_vara_longlong(
2085 : nGroupID, nVarID, start, count, &nData);
2086 1 : snprintf(szMetaTemp, sizeof(szMetaTemp), CPL_FRMT_GIB,
2087 : nData);
2088 1 : break;
2089 : }
2090 0 : case NC_UINT64:
2091 : {
2092 : unsigned long long unData;
2093 0 : /* status = */ nc_get_vara_ulonglong(
2094 : nGroupID, nVarID, start, count, &unData);
2095 0 : snprintf(szMetaTemp, sizeof(szMetaTemp), CPL_FRMT_GUIB,
2096 : unData);
2097 0 : break;
2098 : }
2099 0 : default:
2100 0 : CPLDebug("GDAL_netCDF", "invalid dim %s, type=%d",
2101 : szMetaTemp, nVarType);
2102 0 : break;
2103 : }
2104 : }
2105 : else
2106 : {
2107 0 : snprintf(szMetaTemp, sizeof(szMetaTemp), "%d", result + 1);
2108 : }
2109 :
2110 : // Save dimension value.
2111 : // NOTE: removed #original_units as not part of CF-1.
2112 :
2113 38 : GDALPamRasterBand::SetMetadataItem(szMetaName, szMetaTemp);
2114 : }
2115 :
2116 : // Avoid int32 overflow. Perhaps something more sensible to do here ?
2117 40 : if (result > 0 && Sum > INT_MAX / result)
2118 0 : break;
2119 40 : if (Taken > INT_MAX - result * Sum)
2120 0 : break;
2121 :
2122 40 : Taken += result * Sum;
2123 : } // End loop non-spatial dimensions.
2124 :
2125 49 : l_poDS->nPamFlags = nPamFlagsBackup;
2126 49 : }
2127 :
2128 : /************************************************************************/
2129 : /* CheckData() */
2130 : /************************************************************************/
2131 : template <class T>
2132 5732 : void netCDFRasterBand::CheckData(void *pImage, void *pImageNC,
2133 : size_t nTmpBlockXSize, size_t nTmpBlockYSize,
2134 : bool bCheckIsNan)
2135 : {
2136 5732 : CPLAssert(pImage != nullptr && pImageNC != nullptr);
2137 :
2138 : // If this block is not a full block (in the x axis), we need to re-arrange
2139 : // the data this is because partial blocks are not arranged the same way in
2140 : // netcdf and gdal.
2141 5732 : if (nTmpBlockXSize != static_cast<size_t>(nBlockXSize))
2142 : {
2143 6 : T *ptrWrite = static_cast<T *>(pImage);
2144 6 : T *ptrRead = static_cast<T *>(pImageNC);
2145 29 : for (size_t j = 0; j < nTmpBlockYSize;
2146 23 : j++, ptrWrite += nBlockXSize, ptrRead += nTmpBlockXSize)
2147 : {
2148 23 : memmove(ptrWrite, ptrRead, nTmpBlockXSize * sizeof(T));
2149 : }
2150 : }
2151 :
2152 : // Is valid data checking needed or requested?
2153 5732 : if (bValidRangeValid || bCheckIsNan)
2154 : {
2155 1265 : T *ptrImage = static_cast<T *>(pImage);
2156 2584 : for (size_t j = 0; j < nTmpBlockYSize; j++)
2157 : {
2158 : // k moves along the gdal block, skipping the out-of-range pixels.
2159 1319 : size_t k = j * nBlockXSize;
2160 96938 : for (size_t i = 0; i < nTmpBlockXSize; i++, k++)
2161 : {
2162 : // Check for nodata and nan.
2163 95619 : if (CPLIsEqual((double)ptrImage[k], m_dfNoDataValue))
2164 6301 : continue;
2165 89318 : if (bCheckIsNan && std::isnan((double)ptrImage[k]))
2166 : {
2167 5737 : ptrImage[k] = (T)m_dfNoDataValue;
2168 5737 : continue;
2169 : }
2170 : // Check for valid_range.
2171 83581 : if (bValidRangeValid)
2172 : {
2173 40986 : if (((adfValidRange[0] != m_dfNoDataValue) &&
2174 40986 : (ptrImage[k] < (T)adfValidRange[0])) ||
2175 40983 : ((adfValidRange[1] != m_dfNoDataValue) &&
2176 40983 : (ptrImage[k] > (T)adfValidRange[1])))
2177 : {
2178 4 : ptrImage[k] = (T)m_dfNoDataValue;
2179 : }
2180 : }
2181 : }
2182 : }
2183 : }
2184 :
2185 : // If minimum longitude is > 180, subtract 360 from all.
2186 : // If not, disable checking for further calls (check just once).
2187 : // Only check first and last block elements since lon must be monotonic.
2188 5732 : const bool bIsSigned = std::numeric_limits<T>::is_signed;
2189 5419 : if (bCheckLongitude && bIsSigned &&
2190 9 : !CPLIsEqual((double)((T *)pImage)[0], m_dfNoDataValue) &&
2191 8 : !CPLIsEqual((double)((T *)pImage)[nTmpBlockXSize - 1],
2192 2714 : m_dfNoDataValue) &&
2193 8 : std::min(((T *)pImage)[0], ((T *)pImage)[nTmpBlockXSize - 1]) > 180.0)
2194 : {
2195 0 : T *ptrImage = static_cast<T *>(pImage);
2196 0 : for (size_t j = 0; j < nTmpBlockYSize; j++)
2197 : {
2198 0 : size_t k = j * nBlockXSize;
2199 0 : for (size_t i = 0; i < nTmpBlockXSize; i++, k++)
2200 : {
2201 0 : if (!CPLIsEqual((double)ptrImage[k], m_dfNoDataValue))
2202 0 : ptrImage[k] = static_cast<T>(ptrImage[k] - 360);
2203 : }
2204 : }
2205 : }
2206 : else
2207 : {
2208 5732 : bCheckLongitude = false;
2209 : }
2210 5732 : }
2211 :
2212 : /************************************************************************/
2213 : /* CheckDataCpx() */
2214 : /************************************************************************/
2215 : template <class T>
2216 25 : void netCDFRasterBand::CheckDataCpx(void *pImage, void *pImageNC,
2217 : size_t nTmpBlockXSize,
2218 : size_t nTmpBlockYSize, bool bCheckIsNan)
2219 : {
2220 25 : CPLAssert(pImage != nullptr && pImageNC != nullptr);
2221 :
2222 : // If this block is not a full block (in the x axis), we need to re-arrange
2223 : // the data this is because partial blocks are not arranged the same way in
2224 : // netcdf and gdal.
2225 25 : if (nTmpBlockXSize != static_cast<size_t>(nBlockXSize))
2226 : {
2227 0 : T *ptrWrite = static_cast<T *>(pImage);
2228 0 : T *ptrRead = static_cast<T *>(pImageNC);
2229 0 : for (size_t j = 0; j < nTmpBlockYSize; j++,
2230 0 : ptrWrite += (2 * nBlockXSize),
2231 0 : ptrRead += (2 * nTmpBlockXSize))
2232 : {
2233 0 : memmove(ptrWrite, ptrRead, nTmpBlockXSize * sizeof(T) * 2);
2234 : }
2235 : }
2236 :
2237 : // Is valid data checking needed or requested?
2238 25 : if (bValidRangeValid || bCheckIsNan)
2239 : {
2240 0 : T *ptrImage = static_cast<T *>(pImage);
2241 0 : for (size_t j = 0; j < nTmpBlockYSize; j++)
2242 : {
2243 : // k moves along the gdal block, skipping the out-of-range pixels.
2244 0 : size_t k = 2 * j * nBlockXSize;
2245 0 : for (size_t i = 0; i < (2 * nTmpBlockXSize); i++, k++)
2246 : {
2247 : // Check for nodata and nan.
2248 0 : if (CPLIsEqual((double)ptrImage[k], m_dfNoDataValue))
2249 0 : continue;
2250 0 : if (bCheckIsNan && std::isnan((double)ptrImage[k]))
2251 : {
2252 0 : ptrImage[k] = (T)m_dfNoDataValue;
2253 0 : continue;
2254 : }
2255 : // Check for valid_range.
2256 0 : if (bValidRangeValid)
2257 : {
2258 0 : if (((adfValidRange[0] != m_dfNoDataValue) &&
2259 0 : (ptrImage[k] < (T)adfValidRange[0])) ||
2260 0 : ((adfValidRange[1] != m_dfNoDataValue) &&
2261 0 : (ptrImage[k] > (T)adfValidRange[1])))
2262 : {
2263 0 : ptrImage[k] = (T)m_dfNoDataValue;
2264 : }
2265 : }
2266 : }
2267 : }
2268 : }
2269 25 : }
2270 :
2271 : /************************************************************************/
2272 : /* FetchNetcdfChunk() */
2273 : /************************************************************************/
2274 :
2275 5757 : bool netCDFRasterBand::FetchNetcdfChunk(size_t xstart, size_t ystart,
2276 : void *pImage)
2277 : {
2278 5757 : size_t start[MAX_NC_DIMS] = {};
2279 5757 : size_t edge[MAX_NC_DIMS] = {};
2280 :
2281 5757 : start[nBandXPos] = xstart;
2282 5757 : edge[nBandXPos] = nBlockXSize;
2283 5757 : if ((start[nBandXPos] + edge[nBandXPos]) > (size_t)nRasterXSize)
2284 6 : edge[nBandXPos] = nRasterXSize - start[nBandXPos];
2285 5757 : if (nBandYPos >= 0)
2286 : {
2287 5753 : start[nBandYPos] = ystart;
2288 5753 : edge[nBandYPos] = nBlockYSize;
2289 5753 : if ((start[nBandYPos] + edge[nBandYPos]) > (size_t)nRasterYSize)
2290 4 : edge[nBandYPos] = nRasterYSize - start[nBandYPos];
2291 : }
2292 5757 : const size_t nYChunkSize = nBandYPos < 0 ? 1 : edge[nBandYPos];
2293 :
2294 : #ifdef NCDF_DEBUG
2295 : CPLDebug("GDAL_netCDF", "start={%ld,%ld} edge={%ld,%ld} bBottomUp=%d",
2296 : start[nBandXPos], nBandYPos < 0 ? 0 : start[nBandYPos],
2297 : edge[nBandXPos], nYChunkSize, ((netCDFDataset *)poDS)->bBottomUp);
2298 : #endif
2299 :
2300 5757 : int nd = 0;
2301 5757 : nc_inq_varndims(cdfid, nZId, &nd);
2302 5757 : if (nd == 3)
2303 : {
2304 1078 : start[panBandZPos[0]] = nLevel; // z
2305 1078 : edge[panBandZPos[0]] = 1;
2306 : }
2307 :
2308 : // Compute multidimention band position.
2309 : //
2310 : // BandPosition = (Total - sum(PastBandLevels) - 1)/sum(remainingLevels)
2311 : // if Data[2,3,4,x,y]
2312 : //
2313 : // BandPos0 = (nBand) / (3*4)
2314 : // BandPos1 = (nBand - (3*4)) / (4)
2315 : // BandPos2 = (nBand - (3*4)) % (4)
2316 5757 : if (nd > 3)
2317 : {
2318 160 : int Sum = -1;
2319 160 : int Taken = 0;
2320 480 : for (int i = 0; i < nd - 2; i++)
2321 : {
2322 320 : if (i != nd - 2 - 1)
2323 : {
2324 160 : Sum = 1;
2325 320 : for (int j = i + 1; j < nd - 2; j++)
2326 : {
2327 160 : Sum *= panBandZLev[j];
2328 : }
2329 160 : start[panBandZPos[i]] = (int)((nLevel - Taken) / Sum);
2330 160 : edge[panBandZPos[i]] = 1;
2331 : }
2332 : else
2333 : {
2334 160 : start[panBandZPos[i]] = (int)((nLevel - Taken) % Sum);
2335 160 : edge[panBandZPos[i]] = 1;
2336 : }
2337 320 : Taken += static_cast<int>(start[panBandZPos[i]]) * Sum;
2338 : }
2339 : }
2340 :
2341 : // Make sure we are in data mode.
2342 5757 : static_cast<netCDFDataset *>(poDS)->SetDefineMode(false);
2343 :
2344 : // If this block is not a full block in the x axis, we need to
2345 : // re-arrange the data because partial blocks are not arranged the
2346 : // same way in netcdf and gdal, so we first we read the netcdf data at
2347 : // the end of the gdal block buffer then re-arrange rows in CheckData().
2348 5757 : void *pImageNC = pImage;
2349 5757 : if (edge[nBandXPos] != static_cast<size_t>(nBlockXSize))
2350 : {
2351 6 : pImageNC = static_cast<GByte *>(pImage) +
2352 6 : ((static_cast<size_t>(nBlockXSize) * nBlockYSize -
2353 12 : edge[nBandXPos] * nYChunkSize) *
2354 6 : GDALGetDataTypeSizeBytes(eDataType));
2355 : }
2356 :
2357 : // Read data according to type.
2358 : int status;
2359 5757 : if (eDataType == GDT_Byte)
2360 : {
2361 3005 : if (bSignedData)
2362 : {
2363 0 : status = nc_get_vara_schar(cdfid, nZId, start, edge,
2364 : static_cast<signed char *>(pImageNC));
2365 0 : if (status == NC_NOERR)
2366 0 : CheckData<signed char>(pImage, pImageNC, edge[nBandXPos],
2367 : nYChunkSize, false);
2368 : }
2369 : else
2370 : {
2371 3005 : status = nc_get_vara_uchar(cdfid, nZId, start, edge,
2372 : static_cast<unsigned char *>(pImageNC));
2373 3005 : if (status == NC_NOERR)
2374 3005 : CheckData<unsigned char>(pImage, pImageNC, edge[nBandXPos],
2375 : nYChunkSize, false);
2376 : }
2377 : }
2378 2752 : else if (eDataType == GDT_Int8)
2379 : {
2380 60 : status = nc_get_vara_schar(cdfid, nZId, start, edge,
2381 : static_cast<signed char *>(pImageNC));
2382 60 : if (status == NC_NOERR)
2383 60 : CheckData<signed char>(pImage, pImageNC, edge[nBandXPos],
2384 : nYChunkSize, false);
2385 : }
2386 2692 : else if (nc_datatype == NC_SHORT)
2387 : {
2388 465 : status = nc_get_vara_short(cdfid, nZId, start, edge,
2389 : static_cast<short *>(pImageNC));
2390 465 : if (status == NC_NOERR)
2391 : {
2392 465 : if (eDataType == GDT_Int16)
2393 : {
2394 462 : CheckData<GInt16>(pImage, pImageNC, edge[nBandXPos],
2395 : nYChunkSize, false);
2396 : }
2397 : else
2398 : {
2399 3 : CheckData<GUInt16>(pImage, pImageNC, edge[nBandXPos],
2400 : nYChunkSize, false);
2401 : }
2402 : }
2403 : }
2404 2227 : else if (eDataType == GDT_Int32)
2405 : {
2406 : #if SIZEOF_UNSIGNED_LONG == 4
2407 : status = nc_get_vara_long(cdfid, nZId, start, edge,
2408 : static_cast<long *>(pImageNC));
2409 : if (status == NC_NOERR)
2410 : CheckData<long>(pImage, pImageNC, edge[nBandXPos], nYChunkSize,
2411 : false);
2412 : #else
2413 912 : status = nc_get_vara_int(cdfid, nZId, start, edge,
2414 : static_cast<int *>(pImageNC));
2415 912 : if (status == NC_NOERR)
2416 912 : CheckData<int>(pImage, pImageNC, edge[nBandXPos], nYChunkSize,
2417 : false);
2418 : #endif
2419 : }
2420 1315 : else if (eDataType == GDT_Float32)
2421 : {
2422 1178 : status = nc_get_vara_float(cdfid, nZId, start, edge,
2423 : static_cast<float *>(pImageNC));
2424 1178 : if (status == NC_NOERR)
2425 1178 : CheckData<float>(pImage, pImageNC, edge[nBandXPos], nYChunkSize,
2426 : true);
2427 : }
2428 137 : else if (eDataType == GDT_Float64)
2429 : {
2430 86 : status = nc_get_vara_double(cdfid, nZId, start, edge,
2431 : static_cast<double *>(pImageNC));
2432 86 : if (status == NC_NOERR)
2433 86 : CheckData<double>(pImage, pImageNC, edge[nBandXPos], nYChunkSize,
2434 : true);
2435 : }
2436 51 : else if (eDataType == GDT_UInt16)
2437 : {
2438 6 : status = nc_get_vara_ushort(cdfid, nZId, start, edge,
2439 : static_cast<unsigned short *>(pImageNC));
2440 6 : if (status == NC_NOERR)
2441 6 : CheckData<unsigned short>(pImage, pImageNC, edge[nBandXPos],
2442 : nYChunkSize, false);
2443 : }
2444 45 : else if (eDataType == GDT_UInt32)
2445 : {
2446 6 : status = nc_get_vara_uint(cdfid, nZId, start, edge,
2447 : static_cast<unsigned int *>(pImageNC));
2448 6 : if (status == NC_NOERR)
2449 6 : CheckData<unsigned int>(pImage, pImageNC, edge[nBandXPos],
2450 : nYChunkSize, false);
2451 : }
2452 39 : else if (eDataType == GDT_Int64)
2453 : {
2454 7 : status = nc_get_vara_longlong(cdfid, nZId, start, edge,
2455 : static_cast<long long *>(pImageNC));
2456 7 : if (status == NC_NOERR)
2457 7 : CheckData<std::int64_t>(pImage, pImageNC, edge[nBandXPos],
2458 : nYChunkSize, false);
2459 : }
2460 32 : else if (eDataType == GDT_UInt64)
2461 : {
2462 : status =
2463 7 : nc_get_vara_ulonglong(cdfid, nZId, start, edge,
2464 : static_cast<unsigned long long *>(pImageNC));
2465 7 : if (status == NC_NOERR)
2466 7 : CheckData<std::uint64_t>(pImage, pImageNC, edge[nBandXPos],
2467 : nYChunkSize, false);
2468 : }
2469 25 : else if (eDataType == GDT_CInt16)
2470 : {
2471 0 : status = nc_get_vara(cdfid, nZId, start, edge, pImageNC);
2472 0 : if (status == NC_NOERR)
2473 0 : CheckDataCpx<short>(pImage, pImageNC, edge[nBandXPos], nYChunkSize,
2474 : false);
2475 : }
2476 25 : else if (eDataType == GDT_CInt32)
2477 : {
2478 0 : status = nc_get_vara(cdfid, nZId, start, edge, pImageNC);
2479 0 : if (status == NC_NOERR)
2480 0 : CheckDataCpx<int>(pImage, pImageNC, edge[nBandXPos], nYChunkSize,
2481 : false);
2482 : }
2483 25 : else if (eDataType == GDT_CFloat32)
2484 : {
2485 20 : status = nc_get_vara(cdfid, nZId, start, edge, pImageNC);
2486 20 : if (status == NC_NOERR)
2487 20 : CheckDataCpx<float>(pImage, pImageNC, edge[nBandXPos], nYChunkSize,
2488 : false);
2489 : }
2490 5 : else if (eDataType == GDT_CFloat64)
2491 : {
2492 5 : status = nc_get_vara(cdfid, nZId, start, edge, pImageNC);
2493 5 : if (status == NC_NOERR)
2494 5 : CheckDataCpx<double>(pImage, pImageNC, edge[nBandXPos], nYChunkSize,
2495 : false);
2496 : }
2497 :
2498 : else
2499 0 : status = NC_EBADTYPE;
2500 :
2501 5757 : if (status != NC_NOERR)
2502 : {
2503 0 : CPLError(CE_Failure, CPLE_AppDefined,
2504 : "netCDF chunk fetch failed: #%d (%s)", status,
2505 : nc_strerror(status));
2506 0 : return false;
2507 : }
2508 5757 : return true;
2509 : }
2510 :
2511 : /************************************************************************/
2512 : /* IReadBlock() */
2513 : /************************************************************************/
2514 :
2515 5757 : CPLErr netCDFRasterBand::IReadBlock(int nBlockXOff, int nBlockYOff,
2516 : void *pImage)
2517 :
2518 : {
2519 11514 : CPLMutexHolderD(&hNCMutex);
2520 :
2521 : // Locate X, Y and Z position in the array.
2522 :
2523 5757 : size_t xstart = static_cast<size_t>(nBlockXOff) * nBlockXSize;
2524 5757 : size_t ystart = 0;
2525 :
2526 : // Check y order.
2527 5757 : if (nBandYPos >= 0)
2528 : {
2529 5753 : auto poGDS = static_cast<netCDFDataset *>(poDS);
2530 5753 : if (poGDS->bBottomUp)
2531 : {
2532 4838 : if (nBlockYSize == 1)
2533 : {
2534 4825 : ystart = nRasterYSize - 1 - nBlockYOff;
2535 : }
2536 : else
2537 : {
2538 : // in GDAL space
2539 13 : ystart = static_cast<size_t>(nBlockYOff) * nBlockYSize;
2540 : const size_t yend =
2541 26 : std::min(ystart + nBlockYSize - 1,
2542 13 : static_cast<size_t>(nRasterYSize - 1));
2543 : // in netCDF space
2544 13 : const size_t nFirstChunkLine = nRasterYSize - 1 - yend;
2545 13 : const size_t nLastChunkLine = nRasterYSize - 1 - ystart;
2546 13 : const size_t nFirstChunkBlock = nFirstChunkLine / nBlockYSize;
2547 13 : const size_t nLastChunkBlock = nLastChunkLine / nBlockYSize;
2548 :
2549 : const auto firstKey = netCDFDataset::ChunkKey(
2550 13 : nBlockXOff, nFirstChunkBlock, nBand);
2551 : const auto secondKey =
2552 13 : netCDFDataset::ChunkKey(nBlockXOff, nLastChunkBlock, nBand);
2553 :
2554 : // Retrieve data from the one or 2 needed netCDF chunks
2555 13 : std::shared_ptr<std::vector<GByte>> firstChunk;
2556 13 : std::shared_ptr<std::vector<GByte>> secondChunk;
2557 13 : if (poGDS->poChunkCache)
2558 : {
2559 13 : poGDS->poChunkCache->tryGet(firstKey, firstChunk);
2560 13 : if (firstKey != secondKey)
2561 6 : poGDS->poChunkCache->tryGet(secondKey, secondChunk);
2562 : }
2563 : const size_t nChunkLineSize =
2564 13 : static_cast<size_t>(GDALGetDataTypeSizeBytes(eDataType)) *
2565 13 : nBlockXSize;
2566 13 : const size_t nChunkSize = nChunkLineSize * nBlockYSize;
2567 13 : if (!firstChunk)
2568 : {
2569 11 : firstChunk.reset(new std::vector<GByte>(nChunkSize));
2570 11 : if (!FetchNetcdfChunk(xstart,
2571 11 : nFirstChunkBlock * nBlockYSize,
2572 11 : firstChunk.get()->data()))
2573 0 : return CE_Failure;
2574 11 : if (poGDS->poChunkCache)
2575 11 : poGDS->poChunkCache->insert(firstKey, firstChunk);
2576 : }
2577 13 : if (!secondChunk && firstKey != secondKey)
2578 : {
2579 2 : secondChunk.reset(new std::vector<GByte>(nChunkSize));
2580 2 : if (!FetchNetcdfChunk(xstart, nLastChunkBlock * nBlockYSize,
2581 2 : secondChunk.get()->data()))
2582 0 : return CE_Failure;
2583 2 : if (poGDS->poChunkCache)
2584 2 : poGDS->poChunkCache->insert(secondKey, secondChunk);
2585 : }
2586 :
2587 : // Assemble netCDF chunks into GDAL block
2588 13 : GByte *pabyImage = static_cast<GByte *>(pImage);
2589 13 : const size_t nFirstChunkBlockLine =
2590 13 : nFirstChunkBlock * nBlockYSize;
2591 13 : const size_t nLastChunkBlockLine =
2592 13 : nLastChunkBlock * nBlockYSize;
2593 146 : for (size_t iLine = ystart; iLine <= yend; iLine++)
2594 : {
2595 133 : const size_t nLineFromBottom = nRasterYSize - 1 - iLine;
2596 133 : const size_t nChunkY = nLineFromBottom / nBlockYSize;
2597 133 : if (nChunkY == nFirstChunkBlock)
2598 : {
2599 121 : memcpy(pabyImage + nChunkLineSize * (iLine - ystart),
2600 121 : firstChunk.get()->data() +
2601 121 : (nLineFromBottom - nFirstChunkBlockLine) *
2602 : nChunkLineSize,
2603 : nChunkLineSize);
2604 : }
2605 : else
2606 : {
2607 12 : CPLAssert(nChunkY == nLastChunkBlock);
2608 12 : assert(secondChunk);
2609 12 : memcpy(pabyImage + nChunkLineSize * (iLine - ystart),
2610 12 : secondChunk.get()->data() +
2611 12 : (nLineFromBottom - nLastChunkBlockLine) *
2612 : nChunkLineSize,
2613 : nChunkLineSize);
2614 : }
2615 : }
2616 13 : return CE_None;
2617 : }
2618 : }
2619 : else
2620 : {
2621 915 : ystart = static_cast<size_t>(nBlockYOff) * nBlockYSize;
2622 : }
2623 : }
2624 :
2625 5744 : return FetchNetcdfChunk(xstart, ystart, pImage) ? CE_None : CE_Failure;
2626 : }
2627 :
2628 : /************************************************************************/
2629 : /* IWriteBlock() */
2630 : /************************************************************************/
2631 :
2632 6401 : CPLErr netCDFRasterBand::IWriteBlock(CPL_UNUSED int nBlockXOff, int nBlockYOff,
2633 : void *pImage)
2634 : {
2635 12802 : CPLMutexHolderD(&hNCMutex);
2636 :
2637 : #ifdef NCDF_DEBUG
2638 : if (nBlockYOff == 0 || (nBlockYOff == nRasterYSize - 1))
2639 : CPLDebug("GDAL_netCDF",
2640 : "netCDFRasterBand::IWriteBlock( %d, %d, ...) nBand=%d",
2641 : nBlockXOff, nBlockYOff, nBand);
2642 : #endif
2643 :
2644 6401 : int nd = 0;
2645 6401 : nc_inq_varndims(cdfid, nZId, &nd);
2646 :
2647 : // Locate X, Y and Z position in the array.
2648 :
2649 : size_t start[MAX_NC_DIMS];
2650 6401 : memset(start, 0, sizeof(start));
2651 6401 : start[nBandXPos] = static_cast<size_t>(nBlockXOff) * nBlockXSize;
2652 :
2653 : // check y order.
2654 6401 : if (static_cast<netCDFDataset *>(poDS)->bBottomUp)
2655 : {
2656 6377 : if (nBlockYSize == 1)
2657 : {
2658 6377 : start[nBandYPos] = nRasterYSize - 1 - nBlockYOff;
2659 : }
2660 : else
2661 : {
2662 0 : CPLError(CE_Failure, CPLE_AppDefined,
2663 : "nBlockYSize = %d, only 1 supported when "
2664 : "writing bottom-up dataset",
2665 : nBlockYSize);
2666 0 : return CE_Failure;
2667 : }
2668 : }
2669 : else
2670 : {
2671 24 : start[nBandYPos] = static_cast<size_t>(nBlockYOff) * nBlockYSize; // y
2672 : }
2673 :
2674 6401 : size_t edge[MAX_NC_DIMS] = {};
2675 :
2676 6401 : edge[nBandXPos] = nBlockXSize;
2677 6401 : if ((start[nBandXPos] + edge[nBandXPos]) > (size_t)nRasterXSize)
2678 0 : edge[nBandXPos] = nRasterXSize - start[nBandXPos];
2679 6401 : edge[nBandYPos] = nBlockYSize;
2680 6401 : if ((start[nBandYPos] + edge[nBandYPos]) > (size_t)nRasterYSize)
2681 0 : edge[nBandYPos] = nRasterYSize - start[nBandYPos];
2682 :
2683 6401 : if (nd == 3)
2684 : {
2685 610 : start[panBandZPos[0]] = nLevel; // z
2686 610 : edge[panBandZPos[0]] = 1;
2687 : }
2688 :
2689 : // Compute multidimention band position.
2690 : //
2691 : // BandPosition = (Total - sum(PastBandLevels) - 1)/sum(remainingLevels)
2692 : // if Data[2,3,4,x,y]
2693 : //
2694 : // BandPos0 = (nBand) / (3*4)
2695 : // BandPos1 = (nBand - (3*4)) / (4)
2696 : // BandPos2 = (nBand - (3*4)) % (4)
2697 6401 : if (nd > 3)
2698 : {
2699 178 : int Sum = -1;
2700 178 : int Taken = 0;
2701 534 : for (int i = 0; i < nd - 2; i++)
2702 : {
2703 356 : if (i != nd - 2 - 1)
2704 : {
2705 178 : Sum = 1;
2706 356 : for (int j = i + 1; j < nd - 2; j++)
2707 : {
2708 178 : Sum *= panBandZLev[j];
2709 : }
2710 178 : start[panBandZPos[i]] = (int)((nLevel - Taken) / Sum);
2711 178 : edge[panBandZPos[i]] = 1;
2712 : }
2713 : else
2714 : {
2715 178 : start[panBandZPos[i]] = (int)((nLevel - Taken) % Sum);
2716 178 : edge[panBandZPos[i]] = 1;
2717 : }
2718 356 : Taken += static_cast<int>(start[panBandZPos[i]]) * Sum;
2719 : }
2720 : }
2721 :
2722 : // Make sure we are in data mode.
2723 6401 : static_cast<netCDFDataset *>(poDS)->SetDefineMode(false);
2724 :
2725 : // Copy data according to type.
2726 6401 : int status = 0;
2727 6401 : if (eDataType == GDT_Byte)
2728 : {
2729 5842 : if (bSignedData)
2730 0 : status = nc_put_vara_schar(cdfid, nZId, start, edge,
2731 : static_cast<signed char *>(pImage));
2732 : else
2733 5842 : status = nc_put_vara_uchar(cdfid, nZId, start, edge,
2734 : static_cast<unsigned char *>(pImage));
2735 : }
2736 559 : else if (eDataType == GDT_Int8)
2737 : {
2738 40 : status = nc_put_vara_schar(cdfid, nZId, start, edge,
2739 : static_cast<signed char *>(pImage));
2740 : }
2741 519 : else if (nc_datatype == NC_SHORT)
2742 : {
2743 101 : status = nc_put_vara_short(cdfid, nZId, start, edge,
2744 : static_cast<short *>(pImage));
2745 : }
2746 418 : else if (eDataType == GDT_Int32)
2747 : {
2748 210 : status = nc_put_vara_int(cdfid, nZId, start, edge,
2749 : static_cast<int *>(pImage));
2750 : }
2751 208 : else if (eDataType == GDT_Float32)
2752 : {
2753 128 : status = nc_put_vara_float(cdfid, nZId, start, edge,
2754 : static_cast<float *>(pImage));
2755 : }
2756 80 : else if (eDataType == GDT_Float64)
2757 : {
2758 50 : status = nc_put_vara_double(cdfid, nZId, start, edge,
2759 : static_cast<double *>(pImage));
2760 : }
2761 30 : else if (eDataType == GDT_UInt16 &&
2762 12 : static_cast<netCDFDataset *>(poDS)->eFormat == NCDF_FORMAT_NC4)
2763 : {
2764 12 : status = nc_put_vara_ushort(cdfid, nZId, start, edge,
2765 : static_cast<unsigned short *>(pImage));
2766 : }
2767 18 : else if (eDataType == GDT_UInt32 &&
2768 12 : static_cast<netCDFDataset *>(poDS)->eFormat == NCDF_FORMAT_NC4)
2769 : {
2770 12 : status = nc_put_vara_uint(cdfid, nZId, start, edge,
2771 : static_cast<unsigned int *>(pImage));
2772 : }
2773 6 : else if (eDataType == GDT_UInt64 &&
2774 3 : static_cast<netCDFDataset *>(poDS)->eFormat == NCDF_FORMAT_NC4)
2775 : {
2776 3 : status =
2777 3 : nc_put_vara_ulonglong(cdfid, nZId, start, edge,
2778 : static_cast<unsigned long long *>(pImage));
2779 : }
2780 3 : else if (eDataType == GDT_Int64 &&
2781 3 : static_cast<netCDFDataset *>(poDS)->eFormat == NCDF_FORMAT_NC4)
2782 : {
2783 3 : status = nc_put_vara_longlong(cdfid, nZId, start, edge,
2784 : static_cast<long long *>(pImage));
2785 : }
2786 : else
2787 : {
2788 0 : CPLError(CE_Failure, CPLE_NotSupported,
2789 : "The NetCDF driver does not support GDAL data type %d",
2790 0 : eDataType);
2791 0 : status = NC_EBADTYPE;
2792 : }
2793 6401 : NCDF_ERR(status);
2794 :
2795 6401 : if (status != NC_NOERR)
2796 : {
2797 0 : CPLError(CE_Failure, CPLE_AppDefined,
2798 : "netCDF scanline write failed: %s", nc_strerror(status));
2799 0 : return CE_Failure;
2800 : }
2801 :
2802 6401 : return CE_None;
2803 : }
2804 :
2805 : /************************************************************************/
2806 : /* ==================================================================== */
2807 : /* netCDFDataset */
2808 : /* ==================================================================== */
2809 : /************************************************************************/
2810 :
2811 : /************************************************************************/
2812 : /* netCDFDataset() */
2813 : /************************************************************************/
2814 :
2815 1004 : netCDFDataset::netCDFDataset()
2816 : :
2817 : // Basic dataset vars.
2818 : #ifdef ENABLE_NCDUMP
2819 : bFileToDestroyAtClosing(false),
2820 : #endif
2821 : cdfid(-1), nSubDatasets(0), papszSubDatasets(nullptr),
2822 : papszMetadata(nullptr), bBottomUp(true), eFormat(NCDF_FORMAT_NONE),
2823 : bIsGdalFile(false), bIsGdalCfFile(false), pszCFProjection(nullptr),
2824 : pszCFCoordinates(nullptr), nCFVersion(1.6), bSGSupport(false),
2825 1004 : eMultipleLayerBehavior(SINGLE_LAYER), logCount(0), vcdf(this, cdfid),
2826 1004 : GeometryScribe(vcdf, this->generateLogName()),
2827 1004 : FieldScribe(vcdf, this->generateLogName()),
2828 2008 : bufManager(CPLGetUsablePhysicalRAM() / 5),
2829 :
2830 : // projection/GT.
2831 : nXDimID(-1), nYDimID(-1), bIsProjected(false),
2832 : bIsGeographic(false), // Can be not projected, and also not geographic
2833 : // State vars.
2834 : bDefineMode(true), bAddedGridMappingRef(false),
2835 :
2836 : // Create vars.
2837 : papszCreationOptions(nullptr), eCompress(NCDF_COMPRESS_NONE),
2838 : nZLevel(NCDF_DEFLATE_LEVEL), bChunking(false), nCreateMode(NC_CLOBBER),
2839 3012 : bSignedData(true)
2840 : {
2841 1004 : m_oSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
2842 :
2843 : // Set buffers
2844 1004 : bufManager.addBuffer(&(GeometryScribe.getMemBuffer()));
2845 1004 : bufManager.addBuffer(&(FieldScribe.getMemBuffer()));
2846 1004 : }
2847 :
2848 : /************************************************************************/
2849 : /* ~netCDFDataset() */
2850 : /************************************************************************/
2851 :
2852 1934 : netCDFDataset::~netCDFDataset()
2853 :
2854 : {
2855 1004 : netCDFDataset::Close();
2856 1934 : }
2857 :
2858 : /************************************************************************/
2859 : /* Close() */
2860 : /************************************************************************/
2861 :
2862 1750 : CPLErr netCDFDataset::Close()
2863 : {
2864 1750 : CPLErr eErr = CE_None;
2865 1750 : if (nOpenFlags != OPEN_FLAGS_CLOSED)
2866 : {
2867 2008 : CPLMutexHolderD(&hNCMutex);
2868 :
2869 : #ifdef NCDF_DEBUG
2870 : CPLDebug("GDAL_netCDF",
2871 : "netCDFDataset::~netCDFDataset(), cdfid=%d filename=%s", cdfid,
2872 : osFilename.c_str());
2873 : #endif
2874 :
2875 : // Write data related to geotransform
2876 1235 : if (GetAccess() == GA_Update && !m_bAddedProjectionVarsData &&
2877 231 : (m_bHasProjection || m_bHasGeoTransform))
2878 : {
2879 : // Ensure projection is written if GeoTransform OR Projection are
2880 : // missing.
2881 37 : if (!m_bAddedProjectionVarsDefs)
2882 : {
2883 2 : AddProjectionVars(true, nullptr, nullptr);
2884 : }
2885 37 : AddProjectionVars(false, nullptr, nullptr);
2886 : }
2887 :
2888 1004 : if (netCDFDataset::FlushCache(true) != CE_None)
2889 0 : eErr = CE_Failure;
2890 :
2891 1004 : if (GetAccess() == GA_Update && !SGCommitPendingTransaction())
2892 0 : eErr = CE_Failure;
2893 :
2894 1006 : for (size_t i = 0; i < apoVectorDatasets.size(); i++)
2895 2 : delete apoVectorDatasets[i];
2896 :
2897 : // Make sure projection variable is written to band variable.
2898 1004 : if (GetAccess() == GA_Update && !bAddedGridMappingRef)
2899 : {
2900 248 : if (!AddGridMappingRef())
2901 0 : eErr = CE_Failure;
2902 : }
2903 :
2904 1004 : CSLDestroy(papszMetadata);
2905 1004 : CSLDestroy(papszSubDatasets);
2906 1004 : CSLDestroy(papszCreationOptions);
2907 :
2908 1004 : CPLFree(pszCFProjection);
2909 :
2910 1004 : if (cdfid > 0)
2911 : {
2912 : #ifdef NCDF_DEBUG
2913 : CPLDebug("GDAL_netCDF", "calling nc_close( %d)", cdfid);
2914 : #endif
2915 658 : int status = GDAL_nc_close(cdfid);
2916 : #ifdef ENABLE_UFFD
2917 658 : NETCDF_UFFD_UNMAP(pCtx);
2918 : #endif
2919 658 : NCDF_ERR(status);
2920 658 : if (status != NC_NOERR)
2921 0 : eErr = CE_Failure;
2922 : }
2923 :
2924 1004 : if (fpVSIMEM)
2925 15 : VSIFCloseL(fpVSIMEM);
2926 :
2927 : #ifdef ENABLE_NCDUMP
2928 1004 : if (bFileToDestroyAtClosing)
2929 0 : VSIUnlink(osFilename);
2930 : #endif
2931 :
2932 1004 : if (GDALPamDataset::Close() != CE_None)
2933 0 : eErr = CE_Failure;
2934 : }
2935 1750 : return eErr;
2936 : }
2937 :
2938 : /************************************************************************/
2939 : /* SetDefineMode() */
2940 : /************************************************************************/
2941 14226 : bool netCDFDataset::SetDefineMode(bool bNewDefineMode)
2942 : {
2943 : // Do nothing if already in new define mode
2944 : // or if dataset is in read-only mode or if dataset is true NC4 dataset.
2945 14785 : if (bDefineMode == bNewDefineMode || GetAccess() == GA_ReadOnly ||
2946 559 : eFormat == NCDF_FORMAT_NC4)
2947 13814 : return true;
2948 :
2949 412 : CPLDebug("GDAL_netCDF", "SetDefineMode(%d) old=%d",
2950 412 : static_cast<int>(bNewDefineMode), static_cast<int>(bDefineMode));
2951 :
2952 412 : bDefineMode = bNewDefineMode;
2953 :
2954 : int status;
2955 412 : if (bDefineMode)
2956 143 : status = nc_redef(cdfid);
2957 : else
2958 269 : status = nc_enddef(cdfid);
2959 :
2960 412 : NCDF_ERR(status);
2961 412 : return status == NC_NOERR;
2962 : }
2963 :
2964 : /************************************************************************/
2965 : /* GetMetadataDomainList() */
2966 : /************************************************************************/
2967 :
2968 27 : char **netCDFDataset::GetMetadataDomainList()
2969 : {
2970 27 : char **papszDomains = BuildMetadataDomainList(
2971 : GDALDataset::GetMetadataDomainList(), TRUE, "SUBDATASETS", nullptr);
2972 28 : for (const auto &kv : m_oMapDomainToJSon)
2973 1 : papszDomains = CSLAddString(papszDomains, ("json:" + kv.first).c_str());
2974 27 : return papszDomains;
2975 : }
2976 :
2977 : /************************************************************************/
2978 : /* GetMetadata() */
2979 : /************************************************************************/
2980 368 : char **netCDFDataset::GetMetadata(const char *pszDomain)
2981 : {
2982 368 : if (pszDomain != nullptr && STARTS_WITH_CI(pszDomain, "SUBDATASETS"))
2983 38 : return papszSubDatasets;
2984 :
2985 330 : if (pszDomain != nullptr && STARTS_WITH(pszDomain, "json:"))
2986 : {
2987 1 : auto iter = m_oMapDomainToJSon.find(pszDomain + strlen("json:"));
2988 1 : if (iter != m_oMapDomainToJSon.end())
2989 1 : return iter->second.List();
2990 : }
2991 :
2992 329 : return GDALDataset::GetMetadata(pszDomain);
2993 : }
2994 :
2995 : /************************************************************************/
2996 : /* SetMetadataItem() */
2997 : /************************************************************************/
2998 :
2999 43 : CPLErr netCDFDataset::SetMetadataItem(const char *pszName, const char *pszValue,
3000 : const char *pszDomain)
3001 : {
3002 85 : if (GetAccess() == GA_Update &&
3003 85 : (pszDomain == nullptr || pszDomain[0] == '\0') && pszValue != nullptr)
3004 : {
3005 42 : std::string osName(pszName);
3006 :
3007 : // Same logic as in CopyMetadata()
3008 42 : if (STARTS_WITH(osName.c_str(), "NC_GLOBAL#"))
3009 8 : osName = osName.substr(strlen("NC_GLOBAL#"));
3010 34 : else if (strchr(osName.c_str(), '#') == nullptr)
3011 5 : osName = "GDAL_" + osName;
3012 :
3013 84 : if (STARTS_WITH(osName.c_str(), "NETCDF_DIM_") ||
3014 42 : strchr(osName.c_str(), '#') != nullptr)
3015 : {
3016 : // do nothing
3017 29 : return CE_None;
3018 : }
3019 : else
3020 : {
3021 13 : SetDefineMode(true);
3022 :
3023 13 : if (!NCDFPutAttr(cdfid, NC_GLOBAL, osName.c_str(), pszValue))
3024 13 : return CE_Failure;
3025 : }
3026 : }
3027 :
3028 1 : return GDALPamDataset::SetMetadataItem(pszName, pszValue, pszDomain);
3029 : }
3030 :
3031 : /************************************************************************/
3032 : /* SetMetadata() */
3033 : /************************************************************************/
3034 :
3035 8 : CPLErr netCDFDataset::SetMetadata(char **papszMD, const char *pszDomain)
3036 : {
3037 13 : if (GetAccess() == GA_Update &&
3038 5 : (pszDomain == nullptr || pszDomain[0] == '\0'))
3039 : {
3040 : // We don't handle metadata item removal for now
3041 50 : for (const char *const *papszIter = papszMD; papszIter && *papszIter;
3042 : ++papszIter)
3043 : {
3044 42 : char *pszName = nullptr;
3045 42 : const char *pszValue = CPLParseNameValue(*papszIter, &pszName);
3046 42 : if (pszName && pszValue)
3047 42 : SetMetadataItem(pszName, pszValue);
3048 42 : CPLFree(pszName);
3049 : }
3050 8 : return CE_None;
3051 : }
3052 0 : return GDALPamDataset::SetMetadata(papszMD, pszDomain);
3053 : }
3054 :
3055 : /************************************************************************/
3056 : /* GetSpatialRef() */
3057 : /************************************************************************/
3058 :
3059 184 : const OGRSpatialReference *netCDFDataset::GetSpatialRef() const
3060 : {
3061 184 : if (m_bHasProjection)
3062 74 : return m_oSRS.IsEmpty() ? nullptr : &m_oSRS;
3063 :
3064 110 : return GDALPamDataset::GetSpatialRef();
3065 : }
3066 :
3067 : /************************************************************************/
3068 : /* FetchCopyParam() */
3069 : /************************************************************************/
3070 :
3071 436 : double netCDFDataset::FetchCopyParam(const char *pszGridMappingValue,
3072 : const char *pszParam, double dfDefault,
3073 : bool *pbFound)
3074 :
3075 : {
3076 : char *pszTemp =
3077 436 : CPLStrdup(CPLSPrintf("%s#%s", pszGridMappingValue, pszParam));
3078 436 : const char *pszValue = CSLFetchNameValue(papszMetadata, pszTemp);
3079 436 : CPLFree(pszTemp);
3080 :
3081 436 : if (pbFound)
3082 : {
3083 436 : *pbFound = (pszValue != nullptr);
3084 : }
3085 :
3086 436 : if (pszValue)
3087 : {
3088 0 : return CPLAtofM(pszValue);
3089 : }
3090 :
3091 436 : return dfDefault;
3092 : }
3093 :
3094 : /************************************************************************/
3095 : /* FetchStandardParallels() */
3096 : /************************************************************************/
3097 :
3098 : std::vector<std::string>
3099 0 : netCDFDataset::FetchStandardParallels(const char *pszGridMappingValue)
3100 : {
3101 : // cf-1.0 tags
3102 0 : const char *pszValue = FetchAttr(pszGridMappingValue, CF_PP_STD_PARALLEL);
3103 :
3104 0 : std::vector<std::string> ret;
3105 0 : if (pszValue != nullptr)
3106 : {
3107 0 : CPLStringList aosValues;
3108 0 : if (pszValue[0] != '{' &&
3109 0 : CPLString(pszValue).Trim().find(' ') != std::string::npos)
3110 : {
3111 : // Some files like
3112 : // ftp://data.knmi.nl/download/KNW-NetCDF-3D/1.0/noversion/2013/11/14/KNW-1.0_H37-ERA_NL_20131114.nc
3113 : // do not use standard formatting for arrays, but just space
3114 : // separated syntax
3115 0 : aosValues = CSLTokenizeString2(pszValue, " ", 0);
3116 : }
3117 : else
3118 : {
3119 0 : aosValues = NCDFTokenizeArray(pszValue);
3120 : }
3121 0 : for (int i = 0; i < aosValues.size(); i++)
3122 : {
3123 0 : ret.push_back(aosValues[i]);
3124 : }
3125 : }
3126 : // Try gdal tags.
3127 : else
3128 : {
3129 0 : pszValue = FetchAttr(pszGridMappingValue, CF_PP_STD_PARALLEL_1);
3130 :
3131 0 : if (pszValue != nullptr)
3132 0 : ret.push_back(pszValue);
3133 :
3134 0 : pszValue = FetchAttr(pszGridMappingValue, CF_PP_STD_PARALLEL_2);
3135 :
3136 0 : if (pszValue != nullptr)
3137 0 : ret.push_back(pszValue);
3138 : }
3139 :
3140 0 : return ret;
3141 : }
3142 :
3143 : /************************************************************************/
3144 : /* FetchAttr() */
3145 : /************************************************************************/
3146 :
3147 3703 : const char *netCDFDataset::FetchAttr(const char *pszVarFullName,
3148 : const char *pszAttr)
3149 :
3150 : {
3151 3703 : char *pszKey = CPLStrdup(CPLSPrintf("%s#%s", pszVarFullName, pszAttr));
3152 3703 : const char *pszValue = CSLFetchNameValue(papszMetadata, pszKey);
3153 3703 : CPLFree(pszKey);
3154 3703 : return pszValue;
3155 : }
3156 :
3157 2454 : const char *netCDFDataset::FetchAttr(int nGroupId, int nVarId,
3158 : const char *pszAttr)
3159 :
3160 : {
3161 2454 : char *pszVarFullName = nullptr;
3162 2454 : NCDFGetVarFullName(nGroupId, nVarId, &pszVarFullName);
3163 2454 : const char *pszValue = FetchAttr(pszVarFullName, pszAttr);
3164 2454 : CPLFree(pszVarFullName);
3165 2454 : return pszValue;
3166 : }
3167 :
3168 : /************************************************************************/
3169 : /* IsDifferenceBelow() */
3170 : /************************************************************************/
3171 :
3172 1085 : static bool IsDifferenceBelow(double dfA, double dfB, double dfError)
3173 : {
3174 1085 : const double dfAbsDiff = fabs(dfA - dfB);
3175 1085 : return dfAbsDiff <= dfError;
3176 : }
3177 :
3178 : /************************************************************************/
3179 : /* SetProjectionFromVar() */
3180 : /************************************************************************/
3181 514 : void netCDFDataset::SetProjectionFromVar(
3182 : int nGroupId, int nVarId, bool bReadSRSOnly, const char *pszGivenGM,
3183 : std::string *returnProjStr, nccfdriver::SGeometry_Reader *sg,
3184 : std::vector<std::string> *paosRemovedMDItems)
3185 : {
3186 514 : bool bGotGeogCS = false;
3187 514 : bool bGotCfSRS = false;
3188 514 : bool bGotCfWktSRS = false;
3189 514 : bool bGotGdalSRS = false;
3190 514 : bool bGotCfGT = false;
3191 514 : bool bGotGdalGT = false;
3192 :
3193 : // These values from CF metadata.
3194 514 : OGRSpatialReference oSRS;
3195 514 : oSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
3196 514 : size_t xdim = nRasterXSize;
3197 514 : size_t ydim = nRasterYSize;
3198 :
3199 : // These values from GDAL metadata.
3200 514 : const char *pszWKT = nullptr;
3201 514 : const char *pszGeoTransform = nullptr;
3202 :
3203 514 : netCDFDataset *poDS = this; // Perhaps this should be removed for clarity.
3204 :
3205 514 : CPLDebug("GDAL_netCDF", "\n=====\nSetProjectionFromVar( %d, %d)", nGroupId,
3206 : nVarId);
3207 :
3208 : // Get x/y range information.
3209 :
3210 : // Temp variables to use in SetGeoTransform() and SetProjection().
3211 514 : GDALGeoTransform tmpGT;
3212 :
3213 : // Look for grid_mapping metadata.
3214 514 : const char *pszValue = pszGivenGM;
3215 514 : CPLString osTmpGridMapping; // let is in this outer scope as pszValue may
3216 : // point to it
3217 514 : if (pszValue == nullptr)
3218 : {
3219 471 : pszValue = FetchAttr(nGroupId, nVarId, CF_GRD_MAPPING);
3220 471 : if (pszValue && strchr(pszValue, ':') && strchr(pszValue, ' '))
3221 : {
3222 : // Expanded form of grid_mapping
3223 : // e.g. "crsOSGB: x y crsWGS84: lat lon"
3224 : // Pickup the grid_mapping whose coordinates are dimensions of the
3225 : // variable
3226 6 : CPLStringList aosTokens(CSLTokenizeString2(pszValue, " ", 0));
3227 3 : if ((aosTokens.size() % 3) == 0)
3228 : {
3229 3 : for (int i = 0; i < aosTokens.size() / 3; i++)
3230 : {
3231 3 : if (CSLFindString(poDS->papszDimName,
3232 9 : aosTokens[3 * i + 1]) >= 0 &&
3233 3 : CSLFindString(poDS->papszDimName,
3234 3 : aosTokens[3 * i + 2]) >= 0)
3235 : {
3236 3 : osTmpGridMapping = aosTokens[3 * i];
3237 6 : if (!osTmpGridMapping.empty() &&
3238 3 : osTmpGridMapping.back() == ':')
3239 : {
3240 3 : osTmpGridMapping.resize(osTmpGridMapping.size() -
3241 : 1);
3242 : }
3243 3 : pszValue = osTmpGridMapping.c_str();
3244 3 : break;
3245 : }
3246 : }
3247 : }
3248 : }
3249 : }
3250 514 : char *pszGridMappingValue = CPLStrdup(pszValue ? pszValue : "");
3251 :
3252 514 : if (!EQUAL(pszGridMappingValue, ""))
3253 : {
3254 : // Read grid_mapping metadata.
3255 219 : int nProjGroupID = -1;
3256 219 : int nProjVarID = -1;
3257 219 : if (NCDFResolveVar(nGroupId, pszGridMappingValue, &nProjGroupID,
3258 219 : &nProjVarID) == CE_None)
3259 : {
3260 218 : poDS->ReadAttributes(nProjGroupID, nProjVarID);
3261 :
3262 : // Look for GDAL spatial_ref and GeoTransform within grid_mapping.
3263 218 : CPLFree(pszGridMappingValue);
3264 218 : pszGridMappingValue = nullptr;
3265 218 : NCDFGetVarFullName(nProjGroupID, nProjVarID, &pszGridMappingValue);
3266 218 : if (pszGridMappingValue)
3267 : {
3268 218 : CPLDebug("GDAL_netCDF", "got grid_mapping %s",
3269 : pszGridMappingValue);
3270 218 : pszWKT = FetchAttr(pszGridMappingValue, NCDF_SPATIAL_REF);
3271 218 : if (!pszWKT)
3272 : {
3273 34 : pszWKT = FetchAttr(pszGridMappingValue, NCDF_CRS_WKT);
3274 : }
3275 : else
3276 : {
3277 184 : bGotGdalSRS = true;
3278 184 : CPLDebug("GDAL_netCDF", "setting WKT from GDAL");
3279 : }
3280 218 : if (pszWKT)
3281 : {
3282 188 : if (!bGotGdalSRS)
3283 : {
3284 4 : bGotCfWktSRS = true;
3285 4 : CPLDebug("GDAL_netCDF", "setting WKT from CF");
3286 : }
3287 188 : if (returnProjStr != nullptr)
3288 : {
3289 41 : (*returnProjStr) = std::string(pszWKT);
3290 : }
3291 : else
3292 : {
3293 147 : m_bAddedProjectionVarsDefs = true;
3294 147 : m_bAddedProjectionVarsData = true;
3295 294 : OGRSpatialReference oSRSTmp;
3296 147 : oSRSTmp.SetAxisMappingStrategy(
3297 : OAMS_TRADITIONAL_GIS_ORDER);
3298 147 : oSRSTmp.importFromWkt(pszWKT);
3299 147 : SetSpatialRefNoUpdate(&oSRSTmp);
3300 : }
3301 : pszGeoTransform =
3302 188 : FetchAttr(pszGridMappingValue, NCDF_GEOTRANSFORM);
3303 : }
3304 : }
3305 : else
3306 : {
3307 0 : pszGridMappingValue = CPLStrdup("");
3308 : }
3309 : }
3310 : }
3311 :
3312 : // Get information about the file.
3313 : //
3314 : // Was this file created by the GDAL netcdf driver?
3315 : // Was this file created by the newer (CF-conformant) driver?
3316 : //
3317 : // 1) If GDAL netcdf metadata is set, and version >= 1.9,
3318 : // it was created with the new driver
3319 : // 2) Else, if spatial_ref and GeoTransform are present in the
3320 : // grid_mapping variable, it was created by the old driver
3321 514 : pszValue = FetchAttr("NC_GLOBAL", "GDAL");
3322 :
3323 514 : if (pszValue && NCDFIsGDALVersionGTE(pszValue, 1900))
3324 : {
3325 241 : bIsGdalFile = true;
3326 241 : bIsGdalCfFile = true;
3327 : }
3328 273 : else if (pszWKT != nullptr && pszGeoTransform != nullptr)
3329 : {
3330 17 : bIsGdalFile = true;
3331 17 : bIsGdalCfFile = false;
3332 : }
3333 :
3334 : // Set default bottom-up default value.
3335 : // Y axis dimension and absence of GT can modify this value.
3336 : // Override with Config option GDAL_NETCDF_BOTTOMUP.
3337 :
3338 : // New driver is bottom-up by default.
3339 514 : if ((bIsGdalFile && !bIsGdalCfFile) || bSwitchedXY)
3340 19 : poDS->bBottomUp = false;
3341 : else
3342 495 : poDS->bBottomUp = true;
3343 :
3344 514 : CPLDebug("GDAL_netCDF",
3345 : "bIsGdalFile=%d bIsGdalCfFile=%d bSwitchedXY=%d bBottomUp=%d",
3346 514 : static_cast<int>(bIsGdalFile), static_cast<int>(bIsGdalCfFile),
3347 514 : static_cast<int>(bSwitchedXY), static_cast<int>(bBottomUp));
3348 :
3349 : // Read projection coordinates.
3350 :
3351 514 : int nGroupDimXID = -1;
3352 514 : int nVarDimXID = -1;
3353 514 : int nGroupDimYID = -1;
3354 514 : int nVarDimYID = -1;
3355 514 : if (sg != nullptr)
3356 : {
3357 43 : nGroupDimXID = sg->get_ncID();
3358 43 : nGroupDimYID = sg->get_ncID();
3359 43 : nVarDimXID = sg->getNodeCoordVars()[0];
3360 43 : nVarDimYID = sg->getNodeCoordVars()[1];
3361 : }
3362 :
3363 514 : if (!bReadSRSOnly)
3364 : {
3365 348 : NCDFResolveVar(nGroupId, poDS->papszDimName[nXDimID], &nGroupDimXID,
3366 : &nVarDimXID);
3367 348 : NCDFResolveVar(nGroupId, poDS->papszDimName[nYDimID], &nGroupDimYID,
3368 : &nVarDimYID);
3369 : // TODO: if above resolving fails we should also search for coordinate
3370 : // variables without same name than dimension using the same resolving
3371 : // logic. This should handle for example NASA Ocean Color L2 products.
3372 :
3373 : const bool bIgnoreXYAxisNameChecks =
3374 696 : CPLTestBool(CSLFetchNameValueDef(
3375 348 : papszOpenOptions, "IGNORE_XY_AXIS_NAME_CHECKS",
3376 : CPLGetConfigOption("GDAL_NETCDF_IGNORE_XY_AXIS_NAME_CHECKS",
3377 348 : "NO"))) ||
3378 : // Dataset from https://github.com/OSGeo/gdal/issues/4075 has a res
3379 : // and transform attributes
3380 348 : (FetchAttr(nGroupId, nVarId, "res") != nullptr &&
3381 696 : FetchAttr(nGroupId, nVarId, "transform") != nullptr) ||
3382 347 : FetchAttr(nGroupId, NC_GLOBAL, "GMT_version") != nullptr;
3383 :
3384 : // Check that they are 1D or 2D variables
3385 348 : if (nVarDimXID >= 0)
3386 : {
3387 254 : int ndims = -1;
3388 254 : nc_inq_varndims(nGroupId, nVarDimXID, &ndims);
3389 254 : if (ndims == 0 || ndims > 2)
3390 0 : nVarDimXID = -1;
3391 254 : else if (!bIgnoreXYAxisNameChecks)
3392 : {
3393 252 : if (!NCDFIsVarLongitude(nGroupId, nVarDimXID, nullptr) &&
3394 162 : !NCDFIsVarProjectionX(nGroupId, nVarDimXID, nullptr) &&
3395 : // In case of inversion of X/Y
3396 446 : !NCDFIsVarLatitude(nGroupId, nVarDimXID, nullptr) &&
3397 32 : !NCDFIsVarProjectionY(nGroupId, nVarDimXID, nullptr))
3398 : {
3399 : char szVarNameX[NC_MAX_NAME + 1];
3400 32 : CPL_IGNORE_RET_VAL(
3401 32 : nc_inq_varname(nGroupId, nVarDimXID, szVarNameX));
3402 32 : if (!(ndims == 1 &&
3403 31 : (EQUAL(szVarNameX, CF_LONGITUDE_STD_NAME) ||
3404 30 : EQUAL(szVarNameX, CF_LONGITUDE_VAR_NAME))))
3405 : {
3406 31 : CPLDebug(
3407 : "netCDF",
3408 : "Georeferencing ignored due to non-specific "
3409 : "enough X axis name. "
3410 : "Set GDAL_NETCDF_IGNORE_XY_AXIS_NAME_CHECKS=YES "
3411 : "as configuration option to bypass this check");
3412 31 : nVarDimXID = -1;
3413 : }
3414 : }
3415 : }
3416 : }
3417 :
3418 348 : if (nVarDimYID >= 0)
3419 : {
3420 256 : int ndims = -1;
3421 256 : nc_inq_varndims(nGroupId, nVarDimYID, &ndims);
3422 256 : if (ndims == 0 || ndims > 2)
3423 1 : nVarDimYID = -1;
3424 255 : else if (!bIgnoreXYAxisNameChecks)
3425 : {
3426 253 : if (!NCDFIsVarLatitude(nGroupId, nVarDimYID, nullptr) &&
3427 163 : !NCDFIsVarProjectionY(nGroupId, nVarDimYID, nullptr) &&
3428 : // In case of inversion of X/Y
3429 449 : !NCDFIsVarLongitude(nGroupId, nVarDimYID, nullptr) &&
3430 33 : !NCDFIsVarProjectionX(nGroupId, nVarDimYID, nullptr))
3431 : {
3432 : char szVarNameY[NC_MAX_NAME + 1];
3433 33 : CPL_IGNORE_RET_VAL(
3434 33 : nc_inq_varname(nGroupId, nVarDimYID, szVarNameY));
3435 33 : if (!(ndims == 1 &&
3436 33 : (EQUAL(szVarNameY, CF_LATITUDE_STD_NAME) ||
3437 32 : EQUAL(szVarNameY, CF_LATITUDE_VAR_NAME))))
3438 : {
3439 32 : CPLDebug(
3440 : "netCDF",
3441 : "Georeferencing ignored due to non-specific "
3442 : "enough Y axis name. "
3443 : "Set GDAL_NETCDF_IGNORE_XY_AXIS_NAME_CHECKS=YES "
3444 : "as configuration option to bypass this check");
3445 32 : nVarDimYID = -1;
3446 : }
3447 : }
3448 : }
3449 : }
3450 :
3451 348 : if ((nVarDimXID >= 0 && xdim == 1) || (nVarDimXID >= 0 && ydim == 1))
3452 : {
3453 0 : CPLError(CE_Warning, CPLE_AppDefined,
3454 : "1-pixel width/height files not supported, "
3455 : "xdim: %ld ydim: %ld",
3456 : static_cast<long>(xdim), static_cast<long>(ydim));
3457 0 : nVarDimXID = -1;
3458 0 : nVarDimYID = -1;
3459 : }
3460 : }
3461 :
3462 514 : const char *pszUnits = nullptr;
3463 514 : if ((nVarDimXID != -1) && (nVarDimYID != -1) && xdim > 0 && ydim > 0)
3464 : {
3465 266 : const char *pszUnitsX = FetchAttr(nGroupDimXID, nVarDimXID, "units");
3466 266 : const char *pszUnitsY = FetchAttr(nGroupDimYID, nVarDimYID, "units");
3467 : // Normalize degrees_east/degrees_north to degrees
3468 : // Cf https://github.com/OSGeo/gdal/issues/11009
3469 266 : if (pszUnitsX && EQUAL(pszUnitsX, "degrees_east"))
3470 79 : pszUnitsX = "degrees";
3471 266 : if (pszUnitsY && EQUAL(pszUnitsY, "degrees_north"))
3472 79 : pszUnitsY = "degrees";
3473 :
3474 266 : if (pszUnitsX && pszUnitsY)
3475 : {
3476 219 : if (EQUAL(pszUnitsX, pszUnitsY))
3477 216 : pszUnits = pszUnitsX;
3478 3 : else if (!pszWKT && !EQUAL(pszGridMappingValue, ""))
3479 : {
3480 0 : CPLError(CE_Failure, CPLE_AppDefined,
3481 : "X axis unit (%s) is different from Y axis "
3482 : "unit (%s). SRS will ignore axis unit and be "
3483 : "likely wrong.",
3484 : pszUnitsX, pszUnitsY);
3485 : }
3486 : }
3487 47 : else if (pszUnitsX && !pszWKT && !EQUAL(pszGridMappingValue, ""))
3488 : {
3489 0 : CPLError(CE_Failure, CPLE_AppDefined,
3490 : "X axis unit is defined, but not Y one ."
3491 : "SRS will ignore axis unit and be likely wrong.");
3492 : }
3493 47 : else if (pszUnitsY && !pszWKT && !EQUAL(pszGridMappingValue, ""))
3494 : {
3495 0 : CPLError(CE_Failure, CPLE_AppDefined,
3496 : "Y axis unit is defined, but not X one ."
3497 : "SRS will ignore axis unit and be likely wrong.");
3498 : }
3499 : }
3500 :
3501 514 : if (!pszWKT && !EQUAL(pszGridMappingValue, ""))
3502 : {
3503 31 : CPLStringList aosGridMappingKeyValues;
3504 31 : const size_t nLenGridMappingValue = strlen(pszGridMappingValue);
3505 789 : for (const char *const *papszIter = papszMetadata;
3506 789 : papszIter && *papszIter; ++papszIter)
3507 : {
3508 758 : if (STARTS_WITH(*papszIter, pszGridMappingValue) &&
3509 236 : (*papszIter)[nLenGridMappingValue] == '#')
3510 : {
3511 236 : char *pszKey = nullptr;
3512 472 : pszValue = CPLParseNameValue(
3513 236 : *papszIter + nLenGridMappingValue + 1, &pszKey);
3514 236 : if (pszKey && pszValue)
3515 236 : aosGridMappingKeyValues.SetNameValue(pszKey, pszValue);
3516 236 : CPLFree(pszKey);
3517 : }
3518 : }
3519 :
3520 31 : bGotGeogCS = aosGridMappingKeyValues.FetchNameValue(
3521 : CF_PP_SEMI_MAJOR_AXIS) != nullptr;
3522 :
3523 31 : oSRS.importFromCF1(aosGridMappingKeyValues.List(), pszUnits);
3524 31 : bGotCfSRS = oSRS.IsGeographic() || oSRS.IsProjected();
3525 : }
3526 : else
3527 : {
3528 : // Dataset from https://github.com/OSGeo/gdal/issues/4075 has a "crs"
3529 : // attribute hold on the variable of interest that contains a PROJ.4
3530 : // string
3531 483 : pszValue = FetchAttr(nGroupId, nVarId, "crs");
3532 484 : if (pszValue &&
3533 1 : (strstr(pszValue, "+proj=") != nullptr ||
3534 0 : strstr(pszValue, "GEOGCS") != nullptr ||
3535 0 : strstr(pszValue, "PROJCS") != nullptr ||
3536 484 : strstr(pszValue, "EPSG:") != nullptr) &&
3537 1 : oSRS.SetFromUserInput(pszValue) == OGRERR_NONE)
3538 : {
3539 1 : bGotCfSRS = true;
3540 : }
3541 : }
3542 :
3543 : // Set Projection from CF.
3544 514 : double dfLinearUnitsConvFactor = 1.0;
3545 514 : if ((bGotGeogCS || bGotCfSRS))
3546 : {
3547 31 : if ((nVarDimXID != -1) && (nVarDimYID != -1) && xdim > 0 && ydim > 0)
3548 : {
3549 : // Set SRS Units.
3550 :
3551 : // Check units for x and y.
3552 28 : if (oSRS.IsProjected())
3553 : {
3554 25 : dfLinearUnitsConvFactor = oSRS.GetLinearUnits(nullptr);
3555 :
3556 : // If the user doesn't ask to preserve the axis unit,
3557 : // then normalize to metre
3558 31 : if (dfLinearUnitsConvFactor != 1.0 &&
3559 6 : !CPLFetchBool(GetOpenOptions(), "PRESERVE_AXIS_UNIT_IN_CRS",
3560 : false))
3561 : {
3562 5 : oSRS.SetLinearUnits("metre", 1.0);
3563 5 : oSRS.SetAuthority("PROJCS|UNIT", "EPSG", 9001);
3564 : }
3565 : else
3566 : {
3567 20 : dfLinearUnitsConvFactor = 1.0;
3568 : }
3569 : }
3570 : }
3571 :
3572 : // Set projection.
3573 31 : char *pszTempProjection = nullptr;
3574 31 : oSRS.exportToWkt(&pszTempProjection);
3575 31 : if (pszTempProjection)
3576 : {
3577 31 : CPLDebug("GDAL_netCDF", "setting WKT from CF");
3578 31 : if (returnProjStr != nullptr)
3579 : {
3580 2 : (*returnProjStr) = std::string(pszTempProjection);
3581 : }
3582 : else
3583 : {
3584 29 : m_bAddedProjectionVarsDefs = true;
3585 29 : m_bAddedProjectionVarsData = true;
3586 29 : SetSpatialRefNoUpdate(&oSRS);
3587 : }
3588 : }
3589 31 : CPLFree(pszTempProjection);
3590 : }
3591 :
3592 514 : if (!bReadSRSOnly && (nVarDimXID != -1) && (nVarDimYID != -1) && xdim > 0 &&
3593 : ydim > 0)
3594 : {
3595 : double *pdfXCoord =
3596 223 : static_cast<double *>(CPLCalloc(xdim, sizeof(double)));
3597 : double *pdfYCoord =
3598 223 : static_cast<double *>(CPLCalloc(ydim, sizeof(double)));
3599 :
3600 223 : size_t start[2] = {0, 0};
3601 223 : size_t edge[2] = {xdim, 0};
3602 223 : int status = nc_get_vara_double(nGroupDimXID, nVarDimXID, start, edge,
3603 : pdfXCoord);
3604 223 : NCDF_ERR(status);
3605 :
3606 223 : edge[0] = ydim;
3607 223 : status = nc_get_vara_double(nGroupDimYID, nVarDimYID, start, edge,
3608 : pdfYCoord);
3609 223 : NCDF_ERR(status);
3610 :
3611 223 : nc_type nc_var_dimx_datatype = NC_NAT;
3612 : status =
3613 223 : nc_inq_vartype(nGroupDimXID, nVarDimXID, &nc_var_dimx_datatype);
3614 223 : NCDF_ERR(status);
3615 :
3616 223 : nc_type nc_var_dimy_datatype = NC_NAT;
3617 : status =
3618 223 : nc_inq_vartype(nGroupDimYID, nVarDimYID, &nc_var_dimy_datatype);
3619 223 : NCDF_ERR(status);
3620 :
3621 223 : if (!poDS->bSwitchedXY)
3622 : {
3623 : // Convert ]180,540] longitude values to ]-180,0].
3624 311 : if (NCDFIsVarLongitude(nGroupDimXID, nVarDimXID, nullptr) &&
3625 90 : CPLTestBool(
3626 : CPLGetConfigOption("GDAL_NETCDF_CENTERLONG_180", "YES")))
3627 : {
3628 : // If minimum longitude is > 180, subtract 360 from all.
3629 : // Add a check on the maximum X value too, since
3630 : // NCDFIsVarLongitude() is not very specific by default (see
3631 : // https://github.com/OSGeo/gdal/issues/1440)
3632 97 : if (std::min(pdfXCoord[0], pdfXCoord[xdim - 1]) > 180.0 &&
3633 7 : std::max(pdfXCoord[0], pdfXCoord[xdim - 1]) <= 540)
3634 : {
3635 0 : CPLDebug(
3636 : "GDAL_netCDF",
3637 : "Offsetting longitudes from ]180,540] to ]-180,180]. "
3638 : "Can be disabled with GDAL_NETCDF_CENTERLONG_180=NO");
3639 0 : for (size_t i = 0; i < xdim; i++)
3640 0 : pdfXCoord[i] -= 360;
3641 : }
3642 : }
3643 : }
3644 :
3645 : // Is pixel spacing uniform across the map?
3646 :
3647 : // Check Longitude.
3648 :
3649 223 : bool bLonSpacingOK = false;
3650 223 : if (xdim == 2)
3651 : {
3652 28 : bLonSpacingOK = true;
3653 : }
3654 : else
3655 : {
3656 195 : bool bWestIsLeft = (pdfXCoord[0] < pdfXCoord[xdim - 1]);
3657 :
3658 : // fix longitudes if longitudes should increase from
3659 : // west to east, but west > east
3660 275 : if (NCDFIsVarLongitude(nGroupDimXID, nVarDimXID, nullptr) &&
3661 80 : !bWestIsLeft)
3662 : {
3663 2 : size_t ndecreases = 0;
3664 :
3665 : // there is lon wrap if longitudes increase
3666 : // with one single decrease
3667 107 : for (size_t i = 1; i < xdim; i++)
3668 : {
3669 105 : if (pdfXCoord[i] < pdfXCoord[i - 1])
3670 1 : ndecreases++;
3671 : }
3672 :
3673 2 : if (ndecreases == 1)
3674 : {
3675 1 : CPLDebug("GDAL_netCDF", "longitude wrap detected");
3676 4 : for (size_t i = 0; i < xdim; i++)
3677 : {
3678 3 : if (pdfXCoord[i] > pdfXCoord[xdim - 1])
3679 1 : pdfXCoord[i] -= 360;
3680 : }
3681 : }
3682 : }
3683 :
3684 195 : const double dfSpacingBegin = pdfXCoord[1] - pdfXCoord[0];
3685 195 : const double dfSpacingMiddle =
3686 195 : pdfXCoord[xdim / 2 + 1] - pdfXCoord[xdim / 2];
3687 195 : const double dfSpacingLast =
3688 195 : pdfXCoord[xdim - 1] - pdfXCoord[xdim - 2];
3689 :
3690 195 : CPLDebug("GDAL_netCDF",
3691 : "xdim: %ld dfSpacingBegin: %f dfSpacingMiddle: %f "
3692 : "dfSpacingLast: %f",
3693 : static_cast<long>(xdim), dfSpacingBegin, dfSpacingMiddle,
3694 : dfSpacingLast);
3695 : #ifdef NCDF_DEBUG
3696 : CPLDebug("GDAL_netCDF", "xcoords: %f %f %f %f %f %f", pdfXCoord[0],
3697 : pdfXCoord[1], pdfXCoord[xdim / 2],
3698 : pdfXCoord[(xdim / 2) + 1], pdfXCoord[xdim - 2],
3699 : pdfXCoord[xdim - 1]);
3700 : #endif
3701 :
3702 : // ftp://ftp.cdc.noaa.gov/Datasets/NARR/Dailies/monolevel/vwnd.10m.2015.nc
3703 : // requires a 0.02% tolerance, so let's settle for 0.05%
3704 :
3705 : // For float variables, increase to 0.2% (as seen in
3706 : // https://github.com/OSGeo/gdal/issues/3663)
3707 195 : const double dfEpsRel =
3708 195 : nc_var_dimx_datatype == NC_FLOAT ? 0.002 : 0.0005;
3709 :
3710 : const double dfEps =
3711 : dfEpsRel *
3712 390 : std::max(fabs(dfSpacingBegin),
3713 195 : std::max(fabs(dfSpacingMiddle), fabs(dfSpacingLast)));
3714 384 : if (IsDifferenceBelow(dfSpacingBegin, dfSpacingLast, dfEps) &&
3715 384 : IsDifferenceBelow(dfSpacingBegin, dfSpacingMiddle, dfEps) &&
3716 189 : IsDifferenceBelow(dfSpacingMiddle, dfSpacingLast, dfEps))
3717 : {
3718 189 : bLonSpacingOK = true;
3719 : }
3720 6 : else if (CPLTestBool(CPLGetConfigOption(
3721 : "GDAL_NETCDF_IGNORE_EQUALLY_SPACED_XY_CHECK", "NO")))
3722 : {
3723 0 : bLonSpacingOK = true;
3724 0 : CPLDebug(
3725 : "GDAL_netCDF",
3726 : "Longitude/X is not equally spaced, but will be considered "
3727 : "as such because of "
3728 : "GDAL_NETCDF_IGNORE_EQUALLY_SPACED_XY_CHECK");
3729 : }
3730 : }
3731 :
3732 223 : if (bLonSpacingOK == false)
3733 : {
3734 6 : CPLDebug(
3735 : "GDAL_netCDF", "%s",
3736 : "Longitude/X is not equally spaced (with a 0.05% tolerance). "
3737 : "You may set the "
3738 : "GDAL_NETCDF_IGNORE_EQUALLY_SPACED_XY_CHECK configuration "
3739 : "option to YES to ignore this check");
3740 : }
3741 :
3742 : // Check Latitude.
3743 223 : bool bLatSpacingOK = false;
3744 :
3745 223 : if (ydim == 2)
3746 : {
3747 48 : bLatSpacingOK = true;
3748 : }
3749 : else
3750 : {
3751 175 : const double dfSpacingBegin = pdfYCoord[1] - pdfYCoord[0];
3752 175 : const double dfSpacingMiddle =
3753 175 : pdfYCoord[ydim / 2 + 1] - pdfYCoord[ydim / 2];
3754 :
3755 175 : const double dfSpacingLast =
3756 175 : pdfYCoord[ydim - 1] - pdfYCoord[ydim - 2];
3757 :
3758 175 : CPLDebug("GDAL_netCDF",
3759 : "ydim: %ld dfSpacingBegin: %f dfSpacingMiddle: %f "
3760 : "dfSpacingLast: %f",
3761 : (long)ydim, dfSpacingBegin, dfSpacingMiddle,
3762 : dfSpacingLast);
3763 : #ifdef NCDF_DEBUG
3764 : CPLDebug("GDAL_netCDF", "ycoords: %f %f %f %f %f %f", pdfYCoord[0],
3765 : pdfYCoord[1], pdfYCoord[ydim / 2],
3766 : pdfYCoord[(ydim / 2) + 1], pdfYCoord[ydim - 2],
3767 : pdfYCoord[ydim - 1]);
3768 : #endif
3769 :
3770 175 : const double dfEpsRel =
3771 175 : nc_var_dimy_datatype == NC_FLOAT ? 0.002 : 0.0005;
3772 :
3773 : const double dfEps =
3774 : dfEpsRel *
3775 350 : std::max(fabs(dfSpacingBegin),
3776 175 : std::max(fabs(dfSpacingMiddle), fabs(dfSpacingLast)));
3777 348 : if (IsDifferenceBelow(dfSpacingBegin, dfSpacingLast, dfEps) &&
3778 348 : IsDifferenceBelow(dfSpacingBegin, dfSpacingMiddle, dfEps) &&
3779 164 : IsDifferenceBelow(dfSpacingMiddle, dfSpacingLast, dfEps))
3780 : {
3781 164 : bLatSpacingOK = true;
3782 : }
3783 11 : else if (CPLTestBool(CPLGetConfigOption(
3784 : "GDAL_NETCDF_IGNORE_EQUALLY_SPACED_XY_CHECK", "NO")))
3785 : {
3786 0 : bLatSpacingOK = true;
3787 0 : CPLDebug(
3788 : "GDAL_netCDF",
3789 : "Latitude/Y is not equally spaced, but will be considered "
3790 : "as such because of "
3791 : "GDAL_NETCDF_IGNORE_EQUALLY_SPACED_XY_CHECK");
3792 : }
3793 11 : else if (!oSRS.IsProjected() &&
3794 11 : fabs(dfSpacingBegin - dfSpacingLast) <= 0.1 &&
3795 30 : fabs(dfSpacingBegin - dfSpacingMiddle) <= 0.1 &&
3796 8 : fabs(dfSpacingMiddle - dfSpacingLast) <= 0.1)
3797 : {
3798 8 : bLatSpacingOK = true;
3799 8 : CPLError(CE_Warning, CPLE_AppDefined,
3800 : "Latitude grid not spaced evenly. "
3801 : "Setting projection for grid spacing is "
3802 : "within 0.1 degrees threshold.");
3803 :
3804 8 : CPLDebug("GDAL_netCDF",
3805 : "Latitude grid not spaced evenly, but within 0.1 "
3806 : "degree threshold (probably a Gaussian grid). "
3807 : "Saving original latitude values in Y_VALUES "
3808 : "geolocation metadata");
3809 8 : Set1DGeolocation(nGroupDimYID, nVarDimYID, "Y");
3810 : }
3811 :
3812 175 : if (bLatSpacingOK == false)
3813 : {
3814 3 : CPLDebug(
3815 : "GDAL_netCDF", "%s",
3816 : "Latitude/Y is not equally spaced (with a 0.05% "
3817 : "tolerance). "
3818 : "You may set the "
3819 : "GDAL_NETCDF_IGNORE_EQUALLY_SPACED_XY_CHECK configuration "
3820 : "option to YES to ignore this check");
3821 : }
3822 : }
3823 :
3824 223 : if (bLonSpacingOK && bLatSpacingOK)
3825 : {
3826 : // We have gridded data so we can set the Georeferencing info.
3827 :
3828 : // Enable GeoTransform.
3829 :
3830 : // In the following "actual_range" and "node_offset"
3831 : // are attributes used by netCDF files created by GMT.
3832 : // If we find them we know how to proceed. Else, use
3833 : // the original algorithm.
3834 216 : bGotCfGT = true;
3835 :
3836 216 : int node_offset = 0;
3837 216 : NCDFResolveAttInt(nGroupId, NC_GLOBAL, "node_offset", &node_offset);
3838 :
3839 216 : double adfActualRange[2] = {0.0, 0.0};
3840 216 : double xMinMax[2] = {0.0, 0.0};
3841 216 : double yMinMax[2] = {0.0, 0.0};
3842 :
3843 : const auto RoundMinMaxForFloatVals =
3844 58 : [](double &dfMin, double &dfMax, int nIntervals)
3845 : {
3846 : // Helps for a case where longitudes range from
3847 : // -179.99 to 180.0 with a 0.01 degree spacing.
3848 : // However as this is encoded in a float array,
3849 : // -179.99 is actually read as -179.99000549316406 as
3850 : // a double. Try to detect that and correct the rounding
3851 :
3852 87 : const auto IsAlmostInteger = [](double dfVal)
3853 : {
3854 87 : constexpr double THRESHOLD_INTEGER = 1e-3;
3855 87 : return std::fabs(dfVal - std::round(dfVal)) <=
3856 87 : THRESHOLD_INTEGER;
3857 : };
3858 :
3859 58 : const double dfSpacing = (dfMax - dfMin) / nIntervals;
3860 58 : if (dfSpacing > 0)
3861 : {
3862 47 : const double dfInvSpacing = 1.0 / dfSpacing;
3863 47 : if (IsAlmostInteger(dfInvSpacing))
3864 : {
3865 20 : const double dfRoundedSpacing =
3866 20 : 1.0 / std::round(dfInvSpacing);
3867 20 : const double dfMinDivRoundedSpacing =
3868 20 : dfMin / dfRoundedSpacing;
3869 20 : const double dfMaxDivRoundedSpacing =
3870 20 : dfMax / dfRoundedSpacing;
3871 40 : if (IsAlmostInteger(dfMinDivRoundedSpacing) &&
3872 20 : IsAlmostInteger(dfMaxDivRoundedSpacing))
3873 : {
3874 20 : const double dfRoundedMin =
3875 20 : std::round(dfMinDivRoundedSpacing) *
3876 : dfRoundedSpacing;
3877 20 : const double dfRoundedMax =
3878 20 : std::round(dfMaxDivRoundedSpacing) *
3879 : dfRoundedSpacing;
3880 20 : if (static_cast<float>(dfMin) ==
3881 20 : static_cast<float>(dfRoundedMin) &&
3882 8 : static_cast<float>(dfMax) ==
3883 8 : static_cast<float>(dfRoundedMax))
3884 : {
3885 7 : dfMin = dfRoundedMin;
3886 7 : dfMax = dfRoundedMax;
3887 : }
3888 : }
3889 : }
3890 : }
3891 58 : };
3892 :
3893 216 : if (!nc_get_att_double(nGroupDimXID, nVarDimXID, "actual_range",
3894 : adfActualRange))
3895 : {
3896 3 : xMinMax[0] = adfActualRange[0];
3897 3 : xMinMax[1] = adfActualRange[1];
3898 :
3899 : // Present xMinMax[] in the same order as padfXCoord
3900 3 : if ((xMinMax[0] - xMinMax[1]) *
3901 3 : (pdfXCoord[0] - pdfXCoord[xdim - 1]) <
3902 : 0)
3903 : {
3904 0 : std::swap(xMinMax[0], xMinMax[1]);
3905 : }
3906 : }
3907 : else
3908 : {
3909 213 : xMinMax[0] = pdfXCoord[0];
3910 213 : xMinMax[1] = pdfXCoord[xdim - 1];
3911 213 : node_offset = 0;
3912 :
3913 213 : if (nc_var_dimx_datatype == NC_FLOAT)
3914 : {
3915 29 : RoundMinMaxForFloatVals(xMinMax[0], xMinMax[1],
3916 29 : poDS->nRasterXSize - 1);
3917 : }
3918 : }
3919 :
3920 216 : if (!nc_get_att_double(nGroupDimYID, nVarDimYID, "actual_range",
3921 : adfActualRange))
3922 : {
3923 3 : yMinMax[0] = adfActualRange[0];
3924 3 : yMinMax[1] = adfActualRange[1];
3925 :
3926 : // Present yMinMax[] in the same order as pdfYCoord
3927 3 : if ((yMinMax[0] - yMinMax[1]) *
3928 3 : (pdfYCoord[0] - pdfYCoord[ydim - 1]) <
3929 : 0)
3930 : {
3931 1 : std::swap(yMinMax[0], yMinMax[1]);
3932 : }
3933 : }
3934 : else
3935 : {
3936 213 : yMinMax[0] = pdfYCoord[0];
3937 213 : yMinMax[1] = pdfYCoord[ydim - 1];
3938 213 : node_offset = 0;
3939 :
3940 213 : if (nc_var_dimy_datatype == NC_FLOAT)
3941 : {
3942 29 : RoundMinMaxForFloatVals(yMinMax[0], yMinMax[1],
3943 29 : poDS->nRasterYSize - 1);
3944 : }
3945 : }
3946 :
3947 216 : double dfCoordOffset = 0.0;
3948 216 : double dfCoordScale = 1.0;
3949 216 : if (!nc_get_att_double(nGroupId, nVarDimXID, CF_ADD_OFFSET,
3950 220 : &dfCoordOffset) &&
3951 4 : !nc_get_att_double(nGroupId, nVarDimXID, CF_SCALE_FACTOR,
3952 : &dfCoordScale))
3953 : {
3954 4 : xMinMax[0] = dfCoordOffset + xMinMax[0] * dfCoordScale;
3955 4 : xMinMax[1] = dfCoordOffset + xMinMax[1] * dfCoordScale;
3956 : }
3957 :
3958 216 : if (!nc_get_att_double(nGroupId, nVarDimYID, CF_ADD_OFFSET,
3959 220 : &dfCoordOffset) &&
3960 4 : !nc_get_att_double(nGroupId, nVarDimYID, CF_SCALE_FACTOR,
3961 : &dfCoordScale))
3962 : {
3963 4 : yMinMax[0] = dfCoordOffset + yMinMax[0] * dfCoordScale;
3964 4 : yMinMax[1] = dfCoordOffset + yMinMax[1] * dfCoordScale;
3965 : }
3966 :
3967 : // Check for reverse order of y-coordinate.
3968 216 : if (!bSwitchedXY)
3969 : {
3970 214 : poDS->bBottomUp = (yMinMax[0] <= yMinMax[1]);
3971 214 : CPLDebug("GDAL_netCDF", "set bBottomUp = %d from Y axis",
3972 214 : static_cast<int>(poDS->bBottomUp));
3973 214 : if (!poDS->bBottomUp)
3974 : {
3975 32 : std::swap(yMinMax[0], yMinMax[1]);
3976 : }
3977 : }
3978 :
3979 : // Geostationary satellites can specify units in (micro)radians
3980 : // So we check if they do, and if so convert to linear units
3981 : // (meters)
3982 216 : const char *pszProjName = oSRS.GetAttrValue("PROJECTION");
3983 216 : if (pszProjName != nullptr)
3984 : {
3985 24 : if (EQUAL(pszProjName, SRS_PT_GEOSTATIONARY_SATELLITE))
3986 : {
3987 : double satelliteHeight =
3988 3 : oSRS.GetProjParm(SRS_PP_SATELLITE_HEIGHT, 1.0);
3989 3 : size_t nAttlen = 0;
3990 : char szUnits[NC_MAX_NAME + 1];
3991 3 : szUnits[0] = '\0';
3992 3 : nc_type nAttype = NC_NAT;
3993 3 : nc_inq_att(nGroupId, nVarDimXID, "units", &nAttype,
3994 : &nAttlen);
3995 6 : if (nAttlen < sizeof(szUnits) &&
3996 3 : nc_get_att_text(nGroupId, nVarDimXID, "units",
3997 : szUnits) == NC_NOERR)
3998 : {
3999 3 : szUnits[nAttlen] = '\0';
4000 3 : if (EQUAL(szUnits, "microradian"))
4001 : {
4002 1 : xMinMax[0] =
4003 1 : xMinMax[0] * satelliteHeight * 0.000001;
4004 1 : xMinMax[1] =
4005 1 : xMinMax[1] * satelliteHeight * 0.000001;
4006 : }
4007 2 : else if (EQUAL(szUnits, "rad") ||
4008 1 : EQUAL(szUnits, "radian"))
4009 : {
4010 2 : xMinMax[0] = xMinMax[0] * satelliteHeight;
4011 2 : xMinMax[1] = xMinMax[1] * satelliteHeight;
4012 : }
4013 : }
4014 3 : szUnits[0] = '\0';
4015 3 : nc_inq_att(nGroupId, nVarDimYID, "units", &nAttype,
4016 : &nAttlen);
4017 6 : if (nAttlen < sizeof(szUnits) &&
4018 3 : nc_get_att_text(nGroupId, nVarDimYID, "units",
4019 : szUnits) == NC_NOERR)
4020 : {
4021 3 : szUnits[nAttlen] = '\0';
4022 3 : if (EQUAL(szUnits, "microradian"))
4023 : {
4024 1 : yMinMax[0] =
4025 1 : yMinMax[0] * satelliteHeight * 0.000001;
4026 1 : yMinMax[1] =
4027 1 : yMinMax[1] * satelliteHeight * 0.000001;
4028 : }
4029 2 : else if (EQUAL(szUnits, "rad") ||
4030 1 : EQUAL(szUnits, "radian"))
4031 : {
4032 2 : yMinMax[0] = yMinMax[0] * satelliteHeight;
4033 2 : yMinMax[1] = yMinMax[1] * satelliteHeight;
4034 : }
4035 : }
4036 : }
4037 : }
4038 :
4039 216 : tmpGT[0] = xMinMax[0];
4040 432 : tmpGT[1] = (xMinMax[1] - xMinMax[0]) /
4041 216 : (poDS->nRasterXSize + (node_offset - 1));
4042 216 : tmpGT[2] = 0;
4043 216 : if (bSwitchedXY)
4044 : {
4045 2 : tmpGT[3] = yMinMax[0];
4046 2 : tmpGT[4] = 0;
4047 2 : tmpGT[5] = (yMinMax[1] - yMinMax[0]) /
4048 2 : (poDS->nRasterYSize + (node_offset - 1));
4049 : }
4050 : else
4051 : {
4052 214 : tmpGT[3] = yMinMax[1];
4053 214 : tmpGT[4] = 0;
4054 214 : tmpGT[5] = (yMinMax[0] - yMinMax[1]) /
4055 214 : (poDS->nRasterYSize + (node_offset - 1));
4056 : }
4057 :
4058 : // Compute the center of the pixel.
4059 216 : if (!node_offset)
4060 : {
4061 : // Otherwise its already the pixel center.
4062 216 : tmpGT[0] -= (tmpGT[1] / 2);
4063 216 : tmpGT[3] -= (tmpGT[5] / 2);
4064 : }
4065 : }
4066 :
4067 : const auto AreSRSEqualThroughProj4String =
4068 2 : [](const OGRSpatialReference &oSRS1,
4069 : const OGRSpatialReference &oSRS2)
4070 : {
4071 2 : char *pszProj4Str1 = nullptr;
4072 2 : oSRS1.exportToProj4(&pszProj4Str1);
4073 :
4074 2 : char *pszProj4Str2 = nullptr;
4075 2 : oSRS2.exportToProj4(&pszProj4Str2);
4076 :
4077 : {
4078 2 : char *pszTmp = strstr(pszProj4Str1, "+datum=");
4079 2 : if (pszTmp)
4080 0 : memcpy(pszTmp, "+ellps=", strlen("+ellps="));
4081 : }
4082 :
4083 : {
4084 2 : char *pszTmp = strstr(pszProj4Str2, "+datum=");
4085 2 : if (pszTmp)
4086 2 : memcpy(pszTmp, "+ellps=", strlen("+ellps="));
4087 : }
4088 :
4089 2 : bool bRet = false;
4090 2 : if (pszProj4Str1 && pszProj4Str2 &&
4091 2 : EQUAL(pszProj4Str1, pszProj4Str2))
4092 : {
4093 1 : bRet = true;
4094 : }
4095 :
4096 2 : CPLFree(pszProj4Str1);
4097 2 : CPLFree(pszProj4Str2);
4098 2 : return bRet;
4099 : };
4100 :
4101 223 : if (dfLinearUnitsConvFactor != 1.0)
4102 : {
4103 35 : for (int i = 0; i < 6; ++i)
4104 30 : tmpGT[i] *= dfLinearUnitsConvFactor;
4105 :
4106 5 : if (paosRemovedMDItems)
4107 : {
4108 : char szVarNameX[NC_MAX_NAME + 1];
4109 5 : CPL_IGNORE_RET_VAL(
4110 5 : nc_inq_varname(nGroupId, nVarDimXID, szVarNameX));
4111 :
4112 : char szVarNameY[NC_MAX_NAME + 1];
4113 5 : CPL_IGNORE_RET_VAL(
4114 5 : nc_inq_varname(nGroupId, nVarDimYID, szVarNameY));
4115 :
4116 5 : paosRemovedMDItems->push_back(
4117 : CPLSPrintf("%s#units", szVarNameX));
4118 5 : paosRemovedMDItems->push_back(
4119 : CPLSPrintf("%s#units", szVarNameY));
4120 : }
4121 : }
4122 :
4123 : // If there is a global "geospatial_bounds_crs" attribute, check that it
4124 : // is consistent with the SRS, and if so, use it as the SRS
4125 : const char *pszGBCRS =
4126 223 : FetchAttr(nGroupId, NC_GLOBAL, "geospatial_bounds_crs");
4127 223 : if (pszGBCRS && STARTS_WITH(pszGBCRS, "EPSG:"))
4128 : {
4129 4 : OGRSpatialReference oSRSFromGBCRS;
4130 2 : oSRSFromGBCRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
4131 2 : if (oSRSFromGBCRS.SetFromUserInput(
4132 : pszGBCRS,
4133 : OGRSpatialReference::
4134 4 : SET_FROM_USER_INPUT_LIMITATIONS_get()) == OGRERR_NONE &&
4135 2 : AreSRSEqualThroughProj4String(oSRS, oSRSFromGBCRS))
4136 : {
4137 1 : oSRS = std::move(oSRSFromGBCRS);
4138 1 : SetSpatialRefNoUpdate(&oSRS);
4139 : }
4140 : }
4141 :
4142 223 : CPLFree(pdfXCoord);
4143 223 : CPLFree(pdfYCoord);
4144 : } // end if(has dims)
4145 :
4146 : // Process custom GeoTransform GDAL value.
4147 514 : if (!EQUAL(pszGridMappingValue, ""))
4148 : {
4149 219 : if (pszGeoTransform != nullptr)
4150 : {
4151 : CPLStringList aosGeoTransform(
4152 220 : CSLTokenizeString2(pszGeoTransform, " ", CSLT_HONOURSTRINGS));
4153 110 : if (aosGeoTransform.size() == 6)
4154 : {
4155 110 : GDALGeoTransform gtFromAttribute;
4156 770 : for (int i = 0; i < 6; i++)
4157 : {
4158 660 : gtFromAttribute[i] = CPLAtof(aosGeoTransform[i]);
4159 : }
4160 :
4161 110 : if (bGotCfGT)
4162 : {
4163 94 : constexpr double GT_RELERROR_WARN_THRESHOLD = 1e-6;
4164 94 : double dfMaxAbsoluteError = 0.0;
4165 658 : for (int i = 0; i < 6; i++)
4166 : {
4167 : double dfAbsoluteError =
4168 564 : std::abs(tmpGT[i] - gtFromAttribute[i]);
4169 564 : if (dfAbsoluteError >
4170 564 : std::abs(gtFromAttribute[i] *
4171 : GT_RELERROR_WARN_THRESHOLD))
4172 : {
4173 2 : dfMaxAbsoluteError =
4174 2 : std::max(dfMaxAbsoluteError, dfAbsoluteError);
4175 : }
4176 : }
4177 :
4178 94 : if (dfMaxAbsoluteError > 0)
4179 : {
4180 2 : CPLError(CE_Warning, CPLE_AppDefined,
4181 : "GeoTransform read from attribute of %s "
4182 : "variable differs from value calculated from "
4183 : "dimension variables (max diff = %g). Using "
4184 : "value from attribute.",
4185 : pszGridMappingValue, dfMaxAbsoluteError);
4186 : }
4187 : }
4188 :
4189 110 : tmpGT = std::move(gtFromAttribute);
4190 110 : bGotGdalGT = true;
4191 : }
4192 : }
4193 : else
4194 : {
4195 : // Look for corner array values.
4196 : // CPLDebug("GDAL_netCDF",
4197 : // "looking for geotransform corners");
4198 109 : bool bGotNN = false;
4199 109 : double dfNN = FetchCopyParam(pszGridMappingValue,
4200 : "Northernmost_Northing", 0, &bGotNN);
4201 :
4202 109 : bool bGotSN = false;
4203 109 : double dfSN = FetchCopyParam(pszGridMappingValue,
4204 : "Southernmost_Northing", 0, &bGotSN);
4205 :
4206 109 : bool bGotEE = false;
4207 109 : double dfEE = FetchCopyParam(pszGridMappingValue,
4208 : "Easternmost_Easting", 0, &bGotEE);
4209 :
4210 109 : bool bGotWE = false;
4211 109 : double dfWE = FetchCopyParam(pszGridMappingValue,
4212 : "Westernmost_Easting", 0, &bGotWE);
4213 :
4214 : // Only set the GeoTransform if we got all the values.
4215 109 : if (bGotNN && bGotSN && bGotEE && bGotWE)
4216 : {
4217 0 : bGotGdalGT = true;
4218 :
4219 0 : tmpGT[0] = dfWE;
4220 0 : tmpGT[1] = (dfEE - dfWE) / (poDS->GetRasterXSize() - 1);
4221 0 : tmpGT[2] = 0.0;
4222 0 : tmpGT[3] = dfNN;
4223 0 : tmpGT[4] = 0.0;
4224 0 : tmpGT[5] = (dfSN - dfNN) / (poDS->GetRasterYSize() - 1);
4225 : // Compute the center of the pixel.
4226 0 : tmpGT[0] = dfWE - (tmpGT[1] / 2);
4227 0 : tmpGT[3] = dfNN - (tmpGT[5] / 2);
4228 : }
4229 : } // (pszGeoTransform != NULL)
4230 :
4231 219 : if (bGotGdalSRS && !bGotGdalGT)
4232 74 : CPLDebug("GDAL_netCDF", "Got SRS but no geotransform from GDAL!");
4233 : }
4234 :
4235 514 : if (!pszWKT && !bGotCfSRS)
4236 : {
4237 : // Some netCDF files have a srid attribute (#6613) like
4238 : // urn:ogc:def:crs:EPSG::6931
4239 295 : const char *pszSRID = FetchAttr(pszGridMappingValue, "srid");
4240 295 : if (pszSRID != nullptr)
4241 : {
4242 0 : oSRS.Clear();
4243 0 : if (oSRS.SetFromUserInput(
4244 : pszSRID,
4245 : OGRSpatialReference::
4246 0 : SET_FROM_USER_INPUT_LIMITATIONS_get()) == OGRERR_NONE)
4247 : {
4248 0 : char *pszWKTExport = nullptr;
4249 0 : CPLDebug("GDAL_netCDF", "Got SRS from %s", pszSRID);
4250 0 : oSRS.exportToWkt(&pszWKTExport);
4251 0 : if (returnProjStr != nullptr)
4252 : {
4253 0 : (*returnProjStr) = std::string(pszWKTExport);
4254 : }
4255 : else
4256 : {
4257 0 : m_bAddedProjectionVarsDefs = true;
4258 0 : m_bAddedProjectionVarsData = true;
4259 0 : SetSpatialRefNoUpdate(&oSRS);
4260 : }
4261 0 : CPLFree(pszWKTExport);
4262 : }
4263 : }
4264 : }
4265 :
4266 514 : CPLFree(pszGridMappingValue);
4267 :
4268 514 : if (bReadSRSOnly)
4269 166 : return;
4270 :
4271 : // Determines the SRS to be used by the geolocation array, if any
4272 696 : std::string osGeolocWKT = SRS_WKT_WGS84_LAT_LONG;
4273 348 : if (!m_oSRS.IsEmpty())
4274 : {
4275 262 : OGRSpatialReference oGeogCRS;
4276 131 : oGeogCRS.CopyGeogCSFrom(&m_oSRS);
4277 131 : char *pszWKTTmp = nullptr;
4278 131 : const char *const apszOptions[] = {"FORMAT=WKT2_2019", nullptr};
4279 131 : if (oGeogCRS.exportToWkt(&pszWKTTmp, apszOptions) == OGRERR_NONE)
4280 : {
4281 131 : osGeolocWKT = pszWKTTmp;
4282 : }
4283 131 : CPLFree(pszWKTTmp);
4284 : }
4285 :
4286 : // Process geolocation arrays from CF "coordinates" attribute.
4287 696 : std::string osGeolocXName, osGeolocYName;
4288 348 : if (ProcessCFGeolocation(nGroupId, nVarId, osGeolocWKT, osGeolocXName,
4289 348 : osGeolocYName))
4290 : {
4291 52 : bool bCanCancelGT = true;
4292 52 : if ((nVarDimXID != -1) && (nVarDimYID != -1))
4293 : {
4294 : char szVarNameX[NC_MAX_NAME + 1];
4295 44 : CPL_IGNORE_RET_VAL(
4296 44 : nc_inq_varname(nGroupId, nVarDimXID, szVarNameX));
4297 : char szVarNameY[NC_MAX_NAME + 1];
4298 44 : CPL_IGNORE_RET_VAL(
4299 44 : nc_inq_varname(nGroupId, nVarDimYID, szVarNameY));
4300 44 : bCanCancelGT =
4301 44 : !(osGeolocXName == szVarNameX && osGeolocYName == szVarNameY);
4302 : }
4303 86 : if (bCanCancelGT && !m_oSRS.IsGeographic() && !m_oSRS.IsProjected() &&
4304 34 : !bSwitchedXY)
4305 : {
4306 32 : bGotCfGT = false;
4307 : }
4308 : }
4309 120 : else if (!bGotCfGT && !bReadSRSOnly && (nVarDimXID != -1) &&
4310 419 : (nVarDimYID != -1) && xdim > 0 && ydim > 0 &&
4311 3 : ((!bSwitchedXY &&
4312 3 : NCDFIsVarLongitude(nGroupId, nVarDimXID, nullptr) &&
4313 1 : NCDFIsVarLatitude(nGroupId, nVarDimYID, nullptr)) ||
4314 2 : (bSwitchedXY &&
4315 0 : NCDFIsVarLongitude(nGroupId, nVarDimYID, nullptr) &&
4316 0 : NCDFIsVarLatitude(nGroupId, nVarDimXID, nullptr))))
4317 : {
4318 : // Case of autotest/gdrivers/data/netcdf/GLMELT_4X5.OCN.nc
4319 : // which is indexed by lat, lon variables, but lat has irregular
4320 : // spacing.
4321 1 : const char *pszGeolocXFullName = poDS->papszDimName[poDS->nXDimID];
4322 1 : const char *pszGeolocYFullName = poDS->papszDimName[poDS->nYDimID];
4323 1 : if (bSwitchedXY)
4324 : {
4325 0 : std::swap(pszGeolocXFullName, pszGeolocYFullName);
4326 0 : GDALPamDataset::SetMetadataItem("SWAP_XY", "YES", "GEOLOCATION");
4327 : }
4328 :
4329 1 : CPLDebug("GDAL_netCDF", "using variables %s and %s for GEOLOCATION",
4330 : pszGeolocXFullName, pszGeolocYFullName);
4331 :
4332 1 : GDALPamDataset::SetMetadataItem("SRS", osGeolocWKT.c_str(),
4333 : "GEOLOCATION");
4334 :
4335 2 : CPLString osTMP;
4336 1 : osTMP.Printf("NETCDF:\"%s\":%s", osFilename.c_str(),
4337 1 : pszGeolocXFullName);
4338 :
4339 1 : GDALPamDataset::SetMetadataItem("X_DATASET", osTMP, "GEOLOCATION");
4340 1 : GDALPamDataset::SetMetadataItem("X_BAND", "1", "GEOLOCATION");
4341 1 : osTMP.Printf("NETCDF:\"%s\":%s", osFilename.c_str(),
4342 1 : pszGeolocYFullName);
4343 :
4344 1 : GDALPamDataset::SetMetadataItem("Y_DATASET", osTMP, "GEOLOCATION");
4345 1 : GDALPamDataset::SetMetadataItem("Y_BAND", "1", "GEOLOCATION");
4346 :
4347 1 : GDALPamDataset::SetMetadataItem("PIXEL_OFFSET", "0", "GEOLOCATION");
4348 1 : GDALPamDataset::SetMetadataItem("PIXEL_STEP", "1", "GEOLOCATION");
4349 :
4350 1 : GDALPamDataset::SetMetadataItem("LINE_OFFSET", "0", "GEOLOCATION");
4351 1 : GDALPamDataset::SetMetadataItem("LINE_STEP", "1", "GEOLOCATION");
4352 :
4353 1 : GDALPamDataset::SetMetadataItem("GEOREFERENCING_CONVENTION",
4354 : "PIXEL_CENTER", "GEOLOCATION");
4355 : }
4356 :
4357 : // Set GeoTransform if we got a complete one - after projection has been set
4358 348 : if (bGotCfGT || bGotGdalGT)
4359 : {
4360 198 : m_bAddedProjectionVarsDefs = true;
4361 198 : m_bAddedProjectionVarsData = true;
4362 198 : SetGeoTransformNoUpdate(tmpGT);
4363 : }
4364 :
4365 : // Debugging reports.
4366 348 : CPLDebug("GDAL_netCDF",
4367 : "bGotGeogCS=%d bGotCfSRS=%d bGotCfGT=%d bGotCfWktSRS=%d "
4368 : "bGotGdalSRS=%d bGotGdalGT=%d",
4369 : static_cast<int>(bGotGeogCS), static_cast<int>(bGotCfSRS),
4370 : static_cast<int>(bGotCfGT), static_cast<int>(bGotCfWktSRS),
4371 : static_cast<int>(bGotGdalSRS), static_cast<int>(bGotGdalGT));
4372 :
4373 348 : if (!bGotCfGT && !bGotGdalGT)
4374 150 : CPLDebug("GDAL_netCDF", "did not get geotransform from CF nor GDAL!");
4375 :
4376 348 : if (!bGotGeogCS && !bGotCfSRS && !bGotGdalSRS && !bGotCfGT && !bGotCfWktSRS)
4377 150 : CPLDebug("GDAL_netCDF", "did not get projection from CF nor GDAL!");
4378 :
4379 : // wish of 6195
4380 : // we don't have CS/SRS, but we do have GT, and we live in -180,360 -90,90
4381 348 : if (!bGotGeogCS && !bGotCfSRS && !bGotGdalSRS && !bGotCfWktSRS)
4382 : {
4383 217 : if (bGotCfGT || bGotGdalGT)
4384 : {
4385 134 : bool bAssumedLongLat = CPLTestBool(CSLFetchNameValueDef(
4386 67 : papszOpenOptions, "ASSUME_LONGLAT",
4387 : CPLGetConfigOption("GDAL_NETCDF_ASSUME_LONGLAT", "NO")));
4388 :
4389 2 : if (bAssumedLongLat && tmpGT[0] >= -180 && tmpGT[0] < 360 &&
4390 2 : (tmpGT[0] + tmpGT[1] * poDS->GetRasterXSize()) <= 360 &&
4391 71 : tmpGT[3] <= 90 && tmpGT[3] > -90 &&
4392 2 : (tmpGT[3] + tmpGT[5] * poDS->GetRasterYSize()) >= -90)
4393 : {
4394 :
4395 2 : poDS->bIsGeographic = true;
4396 2 : char *pszTempProjection = nullptr;
4397 : // seems odd to use 4326 so OGC:CRS84
4398 2 : oSRS.SetFromUserInput("OGC:CRS84");
4399 2 : oSRS.exportToWkt(&pszTempProjection);
4400 2 : if (returnProjStr != nullptr)
4401 : {
4402 0 : (*returnProjStr) = std::string(pszTempProjection);
4403 : }
4404 : else
4405 : {
4406 2 : m_bAddedProjectionVarsDefs = true;
4407 2 : m_bAddedProjectionVarsData = true;
4408 2 : SetSpatialRefNoUpdate(&oSRS);
4409 : }
4410 2 : CPLFree(pszTempProjection);
4411 :
4412 2 : CPLDebug("netCDF",
4413 : "Assumed Longitude Latitude CRS 'OGC:CRS84' because "
4414 : "none otherwise available and geotransform within "
4415 : "suitable bounds. "
4416 : "Set GDAL_NETCDF_ASSUME_LONGLAT=NO as configuration "
4417 : "option or "
4418 : " ASSUME_LONGLAT=NO as open option to bypass this "
4419 : "assumption.");
4420 : }
4421 : }
4422 : }
4423 :
4424 : // Search for Well-known GeogCS if got only CF WKT
4425 : // Disabled for now, as a named datum also include control points
4426 : // (see mailing list and bug#4281
4427 : // For example, WGS84 vs. GDA94 (EPSG:3577) - AEA in netcdf_cf.py
4428 :
4429 : // Disabled for now, but could be set in a config option.
4430 : #if 0
4431 : bool bLookForWellKnownGCS = false; // This could be a Config Option.
4432 :
4433 : if( bLookForWellKnownGCS && bGotCfSRS && !bGotGdalSRS )
4434 : {
4435 : // ET - Could use a more exhaustive method by scanning all EPSG codes in
4436 : // data/gcs.csv as proposed by Even in the gdal-dev mailing list "help
4437 : // for comparing two WKT".
4438 : // This code could be contributed to a new function.
4439 : // OGRSpatialReference * OGRSpatialReference::FindMatchingGeogCS(
4440 : // const OGRSpatialReference *poOther) */
4441 : CPLDebug("GDAL_netCDF", "Searching for Well-known GeogCS");
4442 : const char *pszWKGCSList[] = { "WGS84", "WGS72", "NAD27", "NAD83" };
4443 : char *pszWKGCS = NULL;
4444 : oSRS.exportToPrettyWkt(&pszWKGCS);
4445 : for( size_t i = 0; i < sizeof(pszWKGCSList) / 8; i++ )
4446 : {
4447 : pszWKGCS = CPLStrdup(pszWKGCSList[i]);
4448 : OGRSpatialReference oSRSTmp;
4449 : oSRSTmp.SetWellKnownGeogCS(pszWKGCSList[i]);
4450 : // Set datum to unknown, bug #4281.
4451 : if( oSRSTmp.GetAttrNode("DATUM" ) )
4452 : oSRSTmp.GetAttrNode("DATUM")->GetChild(0)->SetValue("unknown");
4453 : // Could use OGRSpatialReference::StripCTParms(), but let's keep
4454 : // TOWGS84.
4455 : oSRSTmp.GetRoot()->StripNodes("AXIS");
4456 : oSRSTmp.GetRoot()->StripNodes("AUTHORITY");
4457 : oSRSTmp.GetRoot()->StripNodes("EXTENSION");
4458 :
4459 : oSRSTmp.exportToPrettyWkt(&pszWKGCS);
4460 : if( oSRS.IsSameGeogCS(&oSRSTmp) )
4461 : {
4462 : oSRS.SetWellKnownGeogCS(pszWKGCSList[i]);
4463 : oSRS.exportToWkt(&(pszTempProjection));
4464 : SetProjection(pszTempProjection);
4465 : CPLFree(pszTempProjection);
4466 : }
4467 : }
4468 : }
4469 : #endif
4470 : }
4471 :
4472 123 : void netCDFDataset::SetProjectionFromVar(int nGroupId, int nVarId,
4473 : bool bReadSRSOnly)
4474 : {
4475 123 : SetProjectionFromVar(nGroupId, nVarId, bReadSRSOnly, nullptr, nullptr,
4476 : nullptr, nullptr);
4477 123 : }
4478 :
4479 285 : bool netCDFDataset::ProcessNASAL2OceanGeoLocation(int nGroupId, int nVarId)
4480 : {
4481 : // Cf https://oceancolor.gsfc.nasa.gov/docs/format/l2nc/
4482 : // and https://github.com/OSGeo/gdal/issues/7605
4483 :
4484 : // Check for a structure like:
4485 : /* netcdf SNPP_VIIRS.20230406T024200.L2.OC.NRT {
4486 : dimensions:
4487 : number_of_lines = 3248 ;
4488 : pixels_per_line = 3200 ;
4489 : [...]
4490 : pixel_control_points = 3200 ;
4491 : [...]
4492 : group: geophysical_data {
4493 : variables:
4494 : short aot_862(number_of_lines, pixels_per_line) ; <-- nVarId
4495 : [...]
4496 : }
4497 : group: navigation_data {
4498 : variables:
4499 : float longitude(number_of_lines, pixel_control_points) ;
4500 : [...]
4501 : float latitude(number_of_lines, pixel_control_points) ;
4502 : [...]
4503 : }
4504 : }
4505 : */
4506 : // Note that the longitude and latitude arrays are not indexed by the
4507 : // same dimensions. Handle only the case where
4508 : // pixel_control_points == pixels_per_line
4509 : // If there was a subsampling of the geolocation arrays, we'd need to
4510 : // add more logic.
4511 :
4512 570 : std::string osGroupName;
4513 285 : osGroupName.resize(NC_MAX_NAME);
4514 285 : NCDF_ERR(nc_inq_grpname(nGroupId, &osGroupName[0]));
4515 285 : osGroupName.resize(strlen(osGroupName.data()));
4516 285 : if (osGroupName != "geophysical_data")
4517 284 : return false;
4518 :
4519 1 : int nVarDims = 0;
4520 1 : NCDF_ERR(nc_inq_varndims(nGroupId, nVarId, &nVarDims));
4521 1 : if (nVarDims != 2)
4522 0 : return false;
4523 :
4524 1 : int nNavigationDataGrpId = 0;
4525 1 : if (nc_inq_grp_ncid(cdfid, "navigation_data", &nNavigationDataGrpId) !=
4526 : NC_NOERR)
4527 0 : return false;
4528 :
4529 : std::array<int, 2> anVarDimIds;
4530 1 : NCDF_ERR(nc_inq_vardimid(nGroupId, nVarId, anVarDimIds.data()));
4531 :
4532 1 : int nLongitudeId = 0;
4533 1 : int nLatitudeId = 0;
4534 1 : if (nc_inq_varid(nNavigationDataGrpId, "longitude", &nLongitudeId) !=
4535 2 : NC_NOERR ||
4536 1 : nc_inq_varid(nNavigationDataGrpId, "latitude", &nLatitudeId) !=
4537 : NC_NOERR)
4538 : {
4539 0 : return false;
4540 : }
4541 :
4542 1 : int nDimsLongitude = 0;
4543 1 : NCDF_ERR(
4544 : nc_inq_varndims(nNavigationDataGrpId, nLongitudeId, &nDimsLongitude));
4545 1 : int nDimsLatitude = 0;
4546 1 : NCDF_ERR(
4547 : nc_inq_varndims(nNavigationDataGrpId, nLatitudeId, &nDimsLatitude));
4548 1 : if (!(nDimsLongitude == 2 && nDimsLatitude == 2))
4549 : {
4550 0 : return false;
4551 : }
4552 :
4553 : std::array<int, 2> anDimLongitudeIds;
4554 1 : NCDF_ERR(nc_inq_vardimid(nNavigationDataGrpId, nLongitudeId,
4555 : anDimLongitudeIds.data()));
4556 : std::array<int, 2> anDimLatitudeIds;
4557 1 : NCDF_ERR(nc_inq_vardimid(nNavigationDataGrpId, nLatitudeId,
4558 : anDimLatitudeIds.data()));
4559 1 : if (anDimLongitudeIds != anDimLatitudeIds)
4560 : {
4561 0 : return false;
4562 : }
4563 :
4564 : std::array<size_t, 2> anSizeVarDimIds;
4565 : std::array<size_t, 2> anSizeLongLatIds;
4566 2 : if (!(nc_inq_dimlen(cdfid, anVarDimIds[0], &anSizeVarDimIds[0]) ==
4567 1 : NC_NOERR &&
4568 1 : nc_inq_dimlen(cdfid, anVarDimIds[1], &anSizeVarDimIds[1]) ==
4569 1 : NC_NOERR &&
4570 1 : nc_inq_dimlen(cdfid, anDimLongitudeIds[0], &anSizeLongLatIds[0]) ==
4571 1 : NC_NOERR &&
4572 1 : nc_inq_dimlen(cdfid, anDimLongitudeIds[1], &anSizeLongLatIds[1]) ==
4573 : NC_NOERR &&
4574 1 : anSizeVarDimIds == anSizeLongLatIds))
4575 : {
4576 0 : return false;
4577 : }
4578 :
4579 1 : const char *pszGeolocXFullName = "/navigation_data/longitude";
4580 1 : const char *pszGeolocYFullName = "/navigation_data/latitude";
4581 :
4582 1 : if (bSwitchedXY)
4583 : {
4584 0 : std::swap(pszGeolocXFullName, pszGeolocYFullName);
4585 0 : GDALPamDataset::SetMetadataItem("SWAP_XY", "YES", "GEOLOCATION");
4586 : }
4587 :
4588 1 : CPLDebug("GDAL_netCDF", "using variables %s and %s for GEOLOCATION",
4589 : pszGeolocXFullName, pszGeolocYFullName);
4590 :
4591 1 : GDALPamDataset::SetMetadataItem("SRS", SRS_WKT_WGS84_LAT_LONG,
4592 : "GEOLOCATION");
4593 :
4594 1 : CPLString osTMP;
4595 1 : osTMP.Printf("NETCDF:\"%s\":%s", osFilename.c_str(), pszGeolocXFullName);
4596 :
4597 1 : GDALPamDataset::SetMetadataItem("X_DATASET", osTMP, "GEOLOCATION");
4598 1 : GDALPamDataset::SetMetadataItem("X_BAND", "1", "GEOLOCATION");
4599 1 : osTMP.Printf("NETCDF:\"%s\":%s", osFilename.c_str(), pszGeolocYFullName);
4600 :
4601 1 : GDALPamDataset::SetMetadataItem("Y_DATASET", osTMP, "GEOLOCATION");
4602 1 : GDALPamDataset::SetMetadataItem("Y_BAND", "1", "GEOLOCATION");
4603 :
4604 1 : GDALPamDataset::SetMetadataItem("PIXEL_OFFSET", "0", "GEOLOCATION");
4605 1 : GDALPamDataset::SetMetadataItem("PIXEL_STEP", "1", "GEOLOCATION");
4606 :
4607 1 : GDALPamDataset::SetMetadataItem("LINE_OFFSET", "0", "GEOLOCATION");
4608 1 : GDALPamDataset::SetMetadataItem("LINE_STEP", "1", "GEOLOCATION");
4609 :
4610 1 : GDALPamDataset::SetMetadataItem("GEOREFERENCING_CONVENTION", "PIXEL_CENTER",
4611 : "GEOLOCATION");
4612 1 : return true;
4613 : }
4614 :
4615 284 : bool netCDFDataset::ProcessNASAEMITGeoLocation(int nGroupId, int nVarId)
4616 : {
4617 : // Cf https://earth.jpl.nasa.gov/emit/data/data-portal/coverage-and-forecasts/
4618 :
4619 : // Check for a structure like:
4620 : /* netcdf EMIT_L2A_RFL_001_20220903T163129_2224611_012 {
4621 : dimensions:
4622 : downtrack = 1280 ;
4623 : crosstrack = 1242 ;
4624 : bands = 285 ;
4625 : [...]
4626 :
4627 : variables:
4628 : float reflectance(downtrack, crosstrack, bands) ;
4629 :
4630 : group: location {
4631 : variables:
4632 : double lon(downtrack, crosstrack) ;
4633 : lon:_FillValue = -9999. ;
4634 : lon:long_name = "Longitude (WGS-84)" ;
4635 : lon:units = "degrees east" ;
4636 : double lat(downtrack, crosstrack) ;
4637 : lat:_FillValue = -9999. ;
4638 : lat:long_name = "Latitude (WGS-84)" ;
4639 : lat:units = "degrees north" ;
4640 : } // group location
4641 :
4642 : }
4643 : or
4644 : netcdf EMIT_L2B_MIN_001_20231024T055538_2329704_040 {
4645 : dimensions:
4646 : downtrack = 1664 ;
4647 : crosstrack = 1242 ;
4648 : [...]
4649 : variables:
4650 : float group_1_band_depth(downtrack, crosstrack) ;
4651 : group_1_band_depth:_FillValue = -9999.f ;
4652 : group_1_band_depth:long_name = "Group 1 Band Depth" ;
4653 : group_1_band_depth:units = "unitless" ;
4654 : [...]
4655 : group: location {
4656 : variables:
4657 : double lon(downtrack, crosstrack) ;
4658 : lon:_FillValue = -9999. ;
4659 : lon:long_name = "Longitude (WGS-84)" ;
4660 : lon:units = "degrees east" ;
4661 : double lat(downtrack, crosstrack) ;
4662 : lat:_FillValue = -9999. ;
4663 : lat:long_name = "Latitude (WGS-84)" ;
4664 : lat:units = "degrees north" ;
4665 : }
4666 : */
4667 :
4668 284 : int nVarDims = 0;
4669 284 : NCDF_ERR(nc_inq_varndims(nGroupId, nVarId, &nVarDims));
4670 284 : if (nVarDims != 2 && nVarDims != 3)
4671 14 : return false;
4672 :
4673 270 : int nLocationGrpId = 0;
4674 270 : if (nc_inq_grp_ncid(cdfid, "location", &nLocationGrpId) != NC_NOERR)
4675 58 : return false;
4676 :
4677 : std::array<int, 3> anVarDimIds;
4678 212 : NCDF_ERR(nc_inq_vardimid(nGroupId, nVarId, anVarDimIds.data()));
4679 212 : if (nYDimID != anVarDimIds[0] || nXDimID != anVarDimIds[1])
4680 21 : return false;
4681 :
4682 191 : int nLongitudeId = 0;
4683 191 : int nLatitudeId = 0;
4684 229 : if (nc_inq_varid(nLocationGrpId, "lon", &nLongitudeId) != NC_NOERR ||
4685 38 : nc_inq_varid(nLocationGrpId, "lat", &nLatitudeId) != NC_NOERR)
4686 : {
4687 153 : return false;
4688 : }
4689 :
4690 38 : int nDimsLongitude = 0;
4691 38 : NCDF_ERR(nc_inq_varndims(nLocationGrpId, nLongitudeId, &nDimsLongitude));
4692 38 : int nDimsLatitude = 0;
4693 38 : NCDF_ERR(nc_inq_varndims(nLocationGrpId, nLatitudeId, &nDimsLatitude));
4694 38 : if (!(nDimsLongitude == 2 && nDimsLatitude == 2))
4695 : {
4696 34 : return false;
4697 : }
4698 :
4699 : std::array<int, 2> anDimLongitudeIds;
4700 4 : NCDF_ERR(nc_inq_vardimid(nLocationGrpId, nLongitudeId,
4701 : anDimLongitudeIds.data()));
4702 : std::array<int, 2> anDimLatitudeIds;
4703 4 : NCDF_ERR(
4704 : nc_inq_vardimid(nLocationGrpId, nLatitudeId, anDimLatitudeIds.data()));
4705 4 : if (anDimLongitudeIds != anDimLatitudeIds)
4706 : {
4707 0 : return false;
4708 : }
4709 :
4710 8 : if (anDimLongitudeIds[0] != anVarDimIds[0] ||
4711 4 : anDimLongitudeIds[1] != anVarDimIds[1])
4712 : {
4713 0 : return false;
4714 : }
4715 :
4716 4 : const char *pszGeolocXFullName = "/location/lon";
4717 4 : const char *pszGeolocYFullName = "/location/lat";
4718 :
4719 4 : CPLDebug("GDAL_netCDF", "using variables %s and %s for GEOLOCATION",
4720 : pszGeolocXFullName, pszGeolocYFullName);
4721 :
4722 4 : GDALPamDataset::SetMetadataItem("SRS", SRS_WKT_WGS84_LAT_LONG,
4723 : "GEOLOCATION");
4724 :
4725 4 : CPLString osTMP;
4726 4 : osTMP.Printf("NETCDF:\"%s\":%s", osFilename.c_str(), pszGeolocXFullName);
4727 :
4728 4 : GDALPamDataset::SetMetadataItem("X_DATASET", osTMP, "GEOLOCATION");
4729 4 : GDALPamDataset::SetMetadataItem("X_BAND", "1", "GEOLOCATION");
4730 4 : osTMP.Printf("NETCDF:\"%s\":%s", osFilename.c_str(), pszGeolocYFullName);
4731 :
4732 4 : GDALPamDataset::SetMetadataItem("Y_DATASET", osTMP, "GEOLOCATION");
4733 4 : GDALPamDataset::SetMetadataItem("Y_BAND", "1", "GEOLOCATION");
4734 :
4735 4 : GDALPamDataset::SetMetadataItem("PIXEL_OFFSET", "0", "GEOLOCATION");
4736 4 : GDALPamDataset::SetMetadataItem("PIXEL_STEP", "1", "GEOLOCATION");
4737 :
4738 4 : GDALPamDataset::SetMetadataItem("LINE_OFFSET", "0", "GEOLOCATION");
4739 4 : GDALPamDataset::SetMetadataItem("LINE_STEP", "1", "GEOLOCATION");
4740 :
4741 4 : GDALPamDataset::SetMetadataItem("GEOREFERENCING_CONVENTION", "PIXEL_CENTER",
4742 : "GEOLOCATION");
4743 4 : return true;
4744 : }
4745 :
4746 348 : int netCDFDataset::ProcessCFGeolocation(int nGroupId, int nVarId,
4747 : const std::string &osGeolocWKT,
4748 : std::string &osGeolocXNameOut,
4749 : std::string &osGeolocYNameOut)
4750 : {
4751 348 : bool bAddGeoloc = false;
4752 348 : char *pszCoordinates = nullptr;
4753 :
4754 : // If there is no explicit "coordinates" attribute, check if there are
4755 : // "lon" and "lat" 2D variables whose dimensions are the last
4756 : // 2 ones of the variable of interest.
4757 348 : if (NCDFGetAttr(nGroupId, nVarId, "coordinates", &pszCoordinates) !=
4758 : CE_None)
4759 : {
4760 302 : CPLFree(pszCoordinates);
4761 302 : pszCoordinates = nullptr;
4762 :
4763 302 : int nVarDims = 0;
4764 302 : NCDF_ERR(nc_inq_varndims(nGroupId, nVarId, &nVarDims));
4765 302 : if (nVarDims >= 2)
4766 : {
4767 604 : std::vector<int> anVarDimIds(nVarDims);
4768 302 : NCDF_ERR(nc_inq_vardimid(nGroupId, nVarId, anVarDimIds.data()));
4769 :
4770 302 : int nLongitudeId = 0;
4771 302 : int nLatitudeId = 0;
4772 370 : if (nc_inq_varid(nGroupId, "lon", &nLongitudeId) == NC_NOERR &&
4773 68 : nc_inq_varid(nGroupId, "lat", &nLatitudeId) == NC_NOERR)
4774 : {
4775 68 : int nDimsLongitude = 0;
4776 68 : NCDF_ERR(
4777 : nc_inq_varndims(nGroupId, nLongitudeId, &nDimsLongitude));
4778 68 : int nDimsLatitude = 0;
4779 68 : NCDF_ERR(
4780 : nc_inq_varndims(nGroupId, nLatitudeId, &nDimsLatitude));
4781 68 : if (nDimsLongitude == 2 && nDimsLatitude == 2)
4782 : {
4783 34 : std::vector<int> anDimLongitudeIds(2);
4784 17 : NCDF_ERR(nc_inq_vardimid(nGroupId, nLongitudeId,
4785 : anDimLongitudeIds.data()));
4786 34 : std::vector<int> anDimLatitudeIds(2);
4787 17 : NCDF_ERR(nc_inq_vardimid(nGroupId, nLatitudeId,
4788 : anDimLatitudeIds.data()));
4789 17 : if (anDimLongitudeIds == anDimLatitudeIds &&
4790 34 : anVarDimIds[anVarDimIds.size() - 2] ==
4791 51 : anDimLongitudeIds[0] &&
4792 34 : anVarDimIds[anVarDimIds.size() - 1] ==
4793 17 : anDimLongitudeIds[1])
4794 : {
4795 17 : pszCoordinates = CPLStrdup("lon lat");
4796 : }
4797 : }
4798 : }
4799 : }
4800 : }
4801 :
4802 348 : if (pszCoordinates)
4803 : {
4804 : // Get X and Y geolocation names from coordinates attribute.
4805 : const CPLStringList aosCoordinates(
4806 126 : NCDFTokenizeCoordinatesAttribute(pszCoordinates));
4807 63 : if (aosCoordinates.size() >= 2)
4808 : {
4809 : char szGeolocXName[NC_MAX_NAME + 1];
4810 : char szGeolocYName[NC_MAX_NAME + 1];
4811 60 : szGeolocXName[0] = '\0';
4812 60 : szGeolocYName[0] = '\0';
4813 :
4814 : // Test that each variable is longitude/latitude.
4815 193 : for (int i = 0; i < aosCoordinates.size(); i++)
4816 : {
4817 133 : if (NCDFIsVarLongitude(nGroupId, -1, aosCoordinates[i]))
4818 : {
4819 49 : int nOtherGroupId = -1;
4820 49 : int nOtherVarId = -1;
4821 : // Check that the variable actually exists
4822 : // Needed on Sentinel-3 products
4823 49 : if (NCDFResolveVar(nGroupId, aosCoordinates[i],
4824 49 : &nOtherGroupId, &nOtherVarId) == CE_None)
4825 : {
4826 47 : snprintf(szGeolocXName, sizeof(szGeolocXName), "%s",
4827 : aosCoordinates[i]);
4828 : }
4829 : }
4830 84 : else if (NCDFIsVarLatitude(nGroupId, -1, aosCoordinates[i]))
4831 : {
4832 49 : int nOtherGroupId = -1;
4833 49 : int nOtherVarId = -1;
4834 : // Check that the variable actually exists
4835 : // Needed on Sentinel-3 products
4836 49 : if (NCDFResolveVar(nGroupId, aosCoordinates[i],
4837 49 : &nOtherGroupId, &nOtherVarId) == CE_None)
4838 : {
4839 47 : snprintf(szGeolocYName, sizeof(szGeolocYName), "%s",
4840 : aosCoordinates[i]);
4841 : }
4842 : }
4843 : }
4844 : // Add GEOLOCATION metadata.
4845 60 : if (!EQUAL(szGeolocXName, "") && !EQUAL(szGeolocYName, ""))
4846 : {
4847 47 : osGeolocXNameOut = szGeolocXName;
4848 47 : osGeolocYNameOut = szGeolocYName;
4849 :
4850 47 : char *pszGeolocXFullName = nullptr;
4851 47 : char *pszGeolocYFullName = nullptr;
4852 47 : if (NCDFResolveVarFullName(nGroupId, szGeolocXName,
4853 94 : &pszGeolocXFullName) == CE_None &&
4854 47 : NCDFResolveVarFullName(nGroupId, szGeolocYName,
4855 : &pszGeolocYFullName) == CE_None)
4856 : {
4857 47 : if (bSwitchedXY)
4858 : {
4859 2 : std::swap(pszGeolocXFullName, pszGeolocYFullName);
4860 2 : GDALPamDataset::SetMetadataItem("SWAP_XY", "YES",
4861 : "GEOLOCATION");
4862 : }
4863 :
4864 47 : bAddGeoloc = true;
4865 47 : CPLDebug("GDAL_netCDF",
4866 : "using variables %s and %s for GEOLOCATION",
4867 : pszGeolocXFullName, pszGeolocYFullName);
4868 :
4869 47 : GDALPamDataset::SetMetadataItem("SRS", osGeolocWKT.c_str(),
4870 : "GEOLOCATION");
4871 :
4872 94 : CPLString osTMP;
4873 47 : osTMP.Printf("NETCDF:\"%s\":%s", osFilename.c_str(),
4874 47 : pszGeolocXFullName);
4875 :
4876 47 : GDALPamDataset::SetMetadataItem("X_DATASET", osTMP,
4877 : "GEOLOCATION");
4878 47 : GDALPamDataset::SetMetadataItem("X_BAND", "1",
4879 : "GEOLOCATION");
4880 47 : osTMP.Printf("NETCDF:\"%s\":%s", osFilename.c_str(),
4881 47 : pszGeolocYFullName);
4882 :
4883 47 : GDALPamDataset::SetMetadataItem("Y_DATASET", osTMP,
4884 : "GEOLOCATION");
4885 47 : GDALPamDataset::SetMetadataItem("Y_BAND", "1",
4886 : "GEOLOCATION");
4887 :
4888 47 : GDALPamDataset::SetMetadataItem("PIXEL_OFFSET", "0",
4889 : "GEOLOCATION");
4890 47 : GDALPamDataset::SetMetadataItem("PIXEL_STEP", "1",
4891 : "GEOLOCATION");
4892 :
4893 47 : GDALPamDataset::SetMetadataItem("LINE_OFFSET", "0",
4894 : "GEOLOCATION");
4895 47 : GDALPamDataset::SetMetadataItem("LINE_STEP", "1",
4896 : "GEOLOCATION");
4897 :
4898 47 : GDALPamDataset::SetMetadataItem("GEOREFERENCING_CONVENTION",
4899 : "PIXEL_CENTER",
4900 : "GEOLOCATION");
4901 : }
4902 : else
4903 : {
4904 0 : CPLDebug("GDAL_netCDF",
4905 : "cannot resolve location of "
4906 : "lat/lon variables specified by the coordinates "
4907 : "attribute [%s]",
4908 : pszCoordinates);
4909 : }
4910 47 : CPLFree(pszGeolocXFullName);
4911 47 : CPLFree(pszGeolocYFullName);
4912 : }
4913 : else
4914 : {
4915 13 : CPLDebug("GDAL_netCDF",
4916 : "coordinates attribute [%s] is unsupported",
4917 : pszCoordinates);
4918 : }
4919 : }
4920 : else
4921 : {
4922 3 : CPLDebug("GDAL_netCDF",
4923 : "coordinates attribute [%s] with %d element(s) is "
4924 : "unsupported",
4925 : pszCoordinates, aosCoordinates.size());
4926 : }
4927 : }
4928 :
4929 : else
4930 : {
4931 285 : bAddGeoloc = ProcessNASAL2OceanGeoLocation(nGroupId, nVarId);
4932 :
4933 285 : if (!bAddGeoloc)
4934 284 : bAddGeoloc = ProcessNASAEMITGeoLocation(nGroupId, nVarId);
4935 : }
4936 :
4937 348 : CPLFree(pszCoordinates);
4938 :
4939 348 : return bAddGeoloc;
4940 : }
4941 :
4942 8 : CPLErr netCDFDataset::Set1DGeolocation(int nGroupId, int nVarId,
4943 : const char *szDimName)
4944 : {
4945 : // Get values.
4946 8 : char *pszVarValues = nullptr;
4947 8 : CPLErr eErr = NCDFGet1DVar(nGroupId, nVarId, &pszVarValues);
4948 8 : if (eErr != CE_None)
4949 0 : return eErr;
4950 :
4951 : // Write metadata.
4952 8 : char szTemp[NC_MAX_NAME + 1 + 32] = {};
4953 8 : snprintf(szTemp, sizeof(szTemp), "%s_VALUES", szDimName);
4954 8 : GDALPamDataset::SetMetadataItem(szTemp, pszVarValues, "GEOLOCATION2");
4955 :
4956 8 : CPLFree(pszVarValues);
4957 :
4958 8 : return CE_None;
4959 : }
4960 :
4961 0 : double *netCDFDataset::Get1DGeolocation(CPL_UNUSED const char *szDimName,
4962 : int &nVarLen)
4963 : {
4964 0 : nVarLen = 0;
4965 :
4966 : // Get Y_VALUES as tokens.
4967 : char **papszValues =
4968 0 : NCDFTokenizeArray(GetMetadataItem("Y_VALUES", "GEOLOCATION2"));
4969 0 : if (papszValues == nullptr)
4970 0 : return nullptr;
4971 :
4972 : // Initialize and fill array.
4973 0 : nVarLen = CSLCount(papszValues);
4974 : double *pdfVarValues =
4975 0 : static_cast<double *>(CPLCalloc(nVarLen, sizeof(double)));
4976 :
4977 0 : for (int i = 0, j = 0; i < nVarLen; i++)
4978 : {
4979 0 : if (!bBottomUp)
4980 0 : j = nVarLen - 1 - i;
4981 : else
4982 0 : j = i; // Invert latitude values.
4983 0 : char *pszTemp = nullptr;
4984 0 : pdfVarValues[j] = CPLStrtod(papszValues[i], &pszTemp);
4985 : }
4986 0 : CSLDestroy(papszValues);
4987 :
4988 0 : return pdfVarValues;
4989 : }
4990 :
4991 : /************************************************************************/
4992 : /* SetSpatialRefNoUpdate() */
4993 : /************************************************************************/
4994 :
4995 255 : void netCDFDataset::SetSpatialRefNoUpdate(const OGRSpatialReference *poSRS)
4996 : {
4997 255 : m_oSRS.Clear();
4998 255 : if (poSRS)
4999 248 : m_oSRS = *poSRS;
5000 255 : m_bHasProjection = true;
5001 255 : }
5002 :
5003 : /************************************************************************/
5004 : /* SetSpatialRef() */
5005 : /************************************************************************/
5006 :
5007 76 : CPLErr netCDFDataset::SetSpatialRef(const OGRSpatialReference *poSRS)
5008 : {
5009 152 : CPLMutexHolderD(&hNCMutex);
5010 :
5011 76 : if (GetAccess() != GA_Update || m_bHasProjection)
5012 : {
5013 0 : CPLError(CE_Failure, CPLE_AppDefined,
5014 : "netCDFDataset::_SetProjection() should only be called once "
5015 : "in update mode!");
5016 0 : return CE_Failure;
5017 : }
5018 :
5019 76 : if (m_bHasGeoTransform)
5020 : {
5021 32 : SetSpatialRefNoUpdate(poSRS);
5022 :
5023 : // For NC4/NC4C, writing both projection variables and data,
5024 : // followed by redefining nodata value, cancels the projection
5025 : // info from the Band variable, so for now only write the
5026 : // variable definitions, and write data at the end.
5027 : // See https://trac.osgeo.org/gdal/ticket/7245
5028 32 : return AddProjectionVars(true, nullptr, nullptr);
5029 : }
5030 :
5031 44 : SetSpatialRefNoUpdate(poSRS);
5032 :
5033 44 : return CE_None;
5034 : }
5035 :
5036 : /************************************************************************/
5037 : /* SetGeoTransformNoUpdate() */
5038 : /************************************************************************/
5039 :
5040 275 : void netCDFDataset::SetGeoTransformNoUpdate(const GDALGeoTransform >)
5041 : {
5042 275 : m_gt = gt;
5043 275 : m_bHasGeoTransform = true;
5044 275 : }
5045 :
5046 : /************************************************************************/
5047 : /* SetGeoTransform() */
5048 : /************************************************************************/
5049 :
5050 77 : CPLErr netCDFDataset::SetGeoTransform(const GDALGeoTransform >)
5051 : {
5052 154 : CPLMutexHolderD(&hNCMutex);
5053 :
5054 77 : if (GetAccess() != GA_Update || m_bHasGeoTransform)
5055 : {
5056 0 : CPLError(CE_Failure, CPLE_AppDefined,
5057 : "netCDFDataset::SetGeoTransform() should only be called once "
5058 : "in update mode!");
5059 0 : return CE_Failure;
5060 : }
5061 :
5062 77 : CPLDebug("GDAL_netCDF", "SetGeoTransform(%f,%f,%f,%f,%f,%f)", gt[0], gt[1],
5063 : gt[2], gt[3], gt[4], gt[5]);
5064 :
5065 77 : SetGeoTransformNoUpdate(gt);
5066 :
5067 77 : if (m_bHasProjection)
5068 : {
5069 :
5070 : // For NC4/NC4C, writing both projection variables and data,
5071 : // followed by redefining nodata value, cancels the projection
5072 : // info from the Band variable, so for now only write the
5073 : // variable definitions, and write data at the end.
5074 : // See https://trac.osgeo.org/gdal/ticket/7245
5075 3 : return AddProjectionVars(true, nullptr, nullptr);
5076 : }
5077 :
5078 74 : return CE_None;
5079 : }
5080 :
5081 : /************************************************************************/
5082 : /* NCDFWriteSRSVariable() */
5083 : /************************************************************************/
5084 :
5085 128 : int NCDFWriteSRSVariable(int cdfid, const OGRSpatialReference *poSRS,
5086 : char **ppszCFProjection, bool bWriteGDALTags,
5087 : const std::string &srsVarName)
5088 : {
5089 128 : char *pszCFProjection = nullptr;
5090 128 : char **papszKeyValues = nullptr;
5091 128 : poSRS->exportToCF1(&pszCFProjection, &papszKeyValues, nullptr, nullptr);
5092 :
5093 128 : if (bWriteGDALTags)
5094 : {
5095 127 : const char *pszWKT = CSLFetchNameValue(papszKeyValues, NCDF_CRS_WKT);
5096 127 : if (pszWKT)
5097 : {
5098 : // SPATIAL_REF is deprecated. Will be removed in GDAL 4.
5099 127 : papszKeyValues =
5100 127 : CSLSetNameValue(papszKeyValues, NCDF_SPATIAL_REF, pszWKT);
5101 : }
5102 : }
5103 :
5104 128 : const int nValues = CSLCount(papszKeyValues);
5105 :
5106 : int NCDFVarID;
5107 256 : std::string varNameRadix(pszCFProjection);
5108 128 : int nCounter = 2;
5109 : while (true)
5110 : {
5111 130 : NCDFVarID = -1;
5112 130 : nc_inq_varid(cdfid, pszCFProjection, &NCDFVarID);
5113 130 : if (NCDFVarID < 0)
5114 125 : break;
5115 :
5116 5 : int nbAttr = 0;
5117 5 : NCDF_ERR(nc_inq_varnatts(cdfid, NCDFVarID, &nbAttr));
5118 5 : bool bSame = nbAttr == nValues;
5119 41 : for (int i = 0; bSame && (i < nbAttr); i++)
5120 : {
5121 : char szAttrName[NC_MAX_NAME + 1];
5122 38 : szAttrName[0] = 0;
5123 38 : NCDF_ERR(nc_inq_attname(cdfid, NCDFVarID, i, szAttrName));
5124 :
5125 : const char *pszValue =
5126 38 : CSLFetchNameValue(papszKeyValues, szAttrName);
5127 38 : if (!pszValue)
5128 : {
5129 0 : bSame = false;
5130 2 : break;
5131 : }
5132 :
5133 38 : nc_type atttype = NC_NAT;
5134 38 : size_t attlen = 0;
5135 38 : NCDF_ERR(
5136 : nc_inq_att(cdfid, NCDFVarID, szAttrName, &atttype, &attlen));
5137 38 : if (atttype != NC_CHAR && atttype != NC_DOUBLE)
5138 : {
5139 0 : bSame = false;
5140 0 : break;
5141 : }
5142 38 : if (atttype == NC_CHAR)
5143 : {
5144 15 : if (CPLGetValueType(pszValue) != CPL_VALUE_STRING)
5145 : {
5146 0 : bSame = false;
5147 0 : break;
5148 : }
5149 15 : std::string val;
5150 15 : val.resize(attlen);
5151 15 : nc_get_att_text(cdfid, NCDFVarID, szAttrName, &val[0]);
5152 15 : if (val != pszValue)
5153 : {
5154 0 : bSame = false;
5155 0 : break;
5156 : }
5157 : }
5158 : else
5159 : {
5160 : const CPLStringList aosTokens(
5161 23 : CSLTokenizeString2(pszValue, ",", 0));
5162 23 : if (static_cast<size_t>(aosTokens.size()) != attlen)
5163 : {
5164 0 : bSame = false;
5165 0 : break;
5166 : }
5167 : double vals[2];
5168 23 : nc_get_att_double(cdfid, NCDFVarID, szAttrName, vals);
5169 44 : if (vals[0] != CPLAtof(aosTokens[0]) ||
5170 21 : (attlen == 2 && vals[1] != CPLAtof(aosTokens[1])))
5171 : {
5172 2 : bSame = false;
5173 2 : break;
5174 : }
5175 : }
5176 : }
5177 5 : if (bSame)
5178 : {
5179 3 : *ppszCFProjection = pszCFProjection;
5180 3 : CSLDestroy(papszKeyValues);
5181 3 : return NCDFVarID;
5182 : }
5183 2 : CPLFree(pszCFProjection);
5184 2 : pszCFProjection =
5185 2 : CPLStrdup(CPLSPrintf("%s_%d", varNameRadix.c_str(), nCounter));
5186 2 : nCounter++;
5187 2 : }
5188 :
5189 125 : *ppszCFProjection = pszCFProjection;
5190 :
5191 : const char *pszVarName;
5192 :
5193 125 : if (srsVarName != "")
5194 : {
5195 38 : pszVarName = srsVarName.c_str();
5196 : }
5197 : else
5198 : {
5199 87 : pszVarName = pszCFProjection;
5200 : }
5201 :
5202 125 : int status = nc_def_var(cdfid, pszVarName, NC_CHAR, 0, nullptr, &NCDFVarID);
5203 125 : NCDF_ERR(status);
5204 1199 : for (int i = 0; i < nValues; ++i)
5205 : {
5206 1074 : char *pszKey = nullptr;
5207 1074 : const char *pszValue = CPLParseNameValue(papszKeyValues[i], &pszKey);
5208 1074 : if (pszKey && pszValue)
5209 : {
5210 2148 : const CPLStringList aosTokens(CSLTokenizeString2(pszValue, ",", 0));
5211 1074 : double adfValues[2] = {0, 0};
5212 1074 : const int nDoubleCount = std::min(2, aosTokens.size());
5213 1074 : if (!(aosTokens.size() == 2 &&
5214 2147 : CPLGetValueType(aosTokens[0]) != CPL_VALUE_STRING) &&
5215 1073 : CPLGetValueType(pszValue) == CPL_VALUE_STRING)
5216 : {
5217 499 : status = nc_put_att_text(cdfid, NCDFVarID, pszKey,
5218 : strlen(pszValue), pszValue);
5219 : }
5220 : else
5221 : {
5222 1151 : for (int j = 0; j < nDoubleCount; ++j)
5223 576 : adfValues[j] = CPLAtof(aosTokens[j]);
5224 575 : status = nc_put_att_double(cdfid, NCDFVarID, pszKey, NC_DOUBLE,
5225 : nDoubleCount, adfValues);
5226 : }
5227 1074 : NCDF_ERR(status);
5228 : }
5229 1074 : CPLFree(pszKey);
5230 : }
5231 :
5232 125 : CSLDestroy(papszKeyValues);
5233 125 : return NCDFVarID;
5234 : }
5235 :
5236 : /************************************************************************/
5237 : /* NCDFWriteLonLatVarsAttributes() */
5238 : /************************************************************************/
5239 :
5240 101 : void NCDFWriteLonLatVarsAttributes(nccfdriver::netCDFVID &vcdf, int nVarLonID,
5241 : int nVarLatID)
5242 : {
5243 :
5244 : try
5245 : {
5246 101 : vcdf.nc_put_vatt_text(nVarLatID, CF_STD_NAME, CF_LATITUDE_STD_NAME);
5247 101 : vcdf.nc_put_vatt_text(nVarLatID, CF_LNG_NAME, CF_LATITUDE_LNG_NAME);
5248 101 : vcdf.nc_put_vatt_text(nVarLatID, CF_UNITS, CF_DEGREES_NORTH);
5249 101 : vcdf.nc_put_vatt_text(nVarLonID, CF_STD_NAME, CF_LONGITUDE_STD_NAME);
5250 101 : vcdf.nc_put_vatt_text(nVarLonID, CF_LNG_NAME, CF_LONGITUDE_LNG_NAME);
5251 101 : vcdf.nc_put_vatt_text(nVarLonID, CF_UNITS, CF_DEGREES_EAST);
5252 : }
5253 0 : catch (nccfdriver::SG_Exception &e)
5254 : {
5255 0 : CPLError(CE_Failure, CPLE_FileIO, "%s", e.get_err_msg());
5256 : }
5257 101 : }
5258 :
5259 : /************************************************************************/
5260 : /* NCDFWriteRLonRLatVarsAttributes() */
5261 : /************************************************************************/
5262 :
5263 0 : void NCDFWriteRLonRLatVarsAttributes(nccfdriver::netCDFVID &vcdf,
5264 : int nVarRLonID, int nVarRLatID)
5265 : {
5266 : try
5267 : {
5268 0 : vcdf.nc_put_vatt_text(nVarRLatID, CF_STD_NAME, "grid_latitude");
5269 0 : vcdf.nc_put_vatt_text(nVarRLatID, CF_LNG_NAME,
5270 : "latitude in rotated pole grid");
5271 0 : vcdf.nc_put_vatt_text(nVarRLatID, CF_UNITS, "degrees");
5272 0 : vcdf.nc_put_vatt_text(nVarRLatID, CF_AXIS, "Y");
5273 :
5274 0 : vcdf.nc_put_vatt_text(nVarRLonID, CF_STD_NAME, "grid_longitude");
5275 0 : vcdf.nc_put_vatt_text(nVarRLonID, CF_LNG_NAME,
5276 : "longitude in rotated pole grid");
5277 0 : vcdf.nc_put_vatt_text(nVarRLonID, CF_UNITS, "degrees");
5278 0 : vcdf.nc_put_vatt_text(nVarRLonID, CF_AXIS, "X");
5279 : }
5280 0 : catch (nccfdriver::SG_Exception &e)
5281 : {
5282 0 : CPLError(CE_Failure, CPLE_FileIO, "%s", e.get_err_msg());
5283 : }
5284 0 : }
5285 :
5286 : /************************************************************************/
5287 : /* NCDFGetProjectedCFUnit() */
5288 : /************************************************************************/
5289 :
5290 40 : std::string NCDFGetProjectedCFUnit(const OGRSpatialReference *poSRS)
5291 : {
5292 40 : char *pszUnitsToWrite = nullptr;
5293 40 : poSRS->exportToCF1(nullptr, nullptr, &pszUnitsToWrite, nullptr);
5294 40 : std::string osRet = pszUnitsToWrite ? pszUnitsToWrite : std::string();
5295 40 : CPLFree(pszUnitsToWrite);
5296 80 : return osRet;
5297 : }
5298 :
5299 : /************************************************************************/
5300 : /* NCDFWriteXYVarsAttributes() */
5301 : /************************************************************************/
5302 :
5303 29 : void NCDFWriteXYVarsAttributes(nccfdriver::netCDFVID &vcdf, int nVarXID,
5304 : int nVarYID, const OGRSpatialReference *poSRS)
5305 : {
5306 58 : const std::string osUnitsToWrite = NCDFGetProjectedCFUnit(poSRS);
5307 :
5308 : try
5309 : {
5310 29 : vcdf.nc_put_vatt_text(nVarXID, CF_STD_NAME, CF_PROJ_X_COORD);
5311 29 : vcdf.nc_put_vatt_text(nVarXID, CF_LNG_NAME, CF_PROJ_X_COORD_LONG_NAME);
5312 29 : if (!osUnitsToWrite.empty())
5313 29 : vcdf.nc_put_vatt_text(nVarXID, CF_UNITS, osUnitsToWrite.c_str());
5314 29 : vcdf.nc_put_vatt_text(nVarYID, CF_STD_NAME, CF_PROJ_Y_COORD);
5315 29 : vcdf.nc_put_vatt_text(nVarYID, CF_LNG_NAME, CF_PROJ_Y_COORD_LONG_NAME);
5316 29 : if (!osUnitsToWrite.empty())
5317 29 : vcdf.nc_put_vatt_text(nVarYID, CF_UNITS, osUnitsToWrite.c_str());
5318 : }
5319 0 : catch (nccfdriver::SG_Exception &e)
5320 : {
5321 0 : CPLError(CE_Failure, CPLE_FileIO, "%s", e.get_err_msg());
5322 : }
5323 29 : }
5324 :
5325 : /************************************************************************/
5326 : /* AddProjectionVars() */
5327 : /************************************************************************/
5328 :
5329 164 : CPLErr netCDFDataset::AddProjectionVars(bool bDefsOnly,
5330 : GDALProgressFunc pfnProgress,
5331 : void *pProgressData)
5332 : {
5333 164 : if (nCFVersion >= 1.8)
5334 0 : return CE_None; // do nothing
5335 :
5336 164 : bool bWriteGridMapping = false;
5337 164 : bool bWriteLonLat = false;
5338 164 : bool bHasGeoloc = false;
5339 164 : bool bWriteGDALTags = false;
5340 164 : bool bWriteGeoTransform = false;
5341 :
5342 : // For GEOLOCATION information.
5343 164 : GDALDatasetH hDS_X = nullptr;
5344 164 : GDALRasterBandH hBand_X = nullptr;
5345 164 : GDALDatasetH hDS_Y = nullptr;
5346 164 : GDALRasterBandH hBand_Y = nullptr;
5347 :
5348 328 : OGRSpatialReference oSRS(m_oSRS);
5349 164 : if (!m_oSRS.IsEmpty())
5350 : {
5351 138 : if (oSRS.IsProjected())
5352 50 : bIsProjected = true;
5353 88 : else if (oSRS.IsGeographic())
5354 88 : bIsGeographic = true;
5355 : }
5356 :
5357 164 : if (bDefsOnly)
5358 : {
5359 82 : char *pszProjection = nullptr;
5360 82 : m_oSRS.exportToWkt(&pszProjection);
5361 82 : CPLDebug("GDAL_netCDF",
5362 : "SetProjection, WKT now = [%s]\nprojected: %d geographic: %d",
5363 82 : pszProjection ? pszProjection : "(null)",
5364 82 : static_cast<int>(bIsProjected),
5365 82 : static_cast<int>(bIsGeographic));
5366 82 : CPLFree(pszProjection);
5367 :
5368 82 : if (!m_bHasGeoTransform)
5369 5 : CPLDebug("GDAL_netCDF",
5370 : "netCDFDataset::AddProjectionVars() called, "
5371 : "but GeoTransform has not yet been defined!");
5372 :
5373 82 : if (!m_bHasProjection)
5374 6 : CPLDebug("GDAL_netCDF",
5375 : "netCDFDataset::AddProjectionVars() called, "
5376 : "but Projection has not yet been defined!");
5377 : }
5378 :
5379 : // Check GEOLOCATION information.
5380 164 : char **papszGeolocationInfo = netCDFDataset::GetMetadata("GEOLOCATION");
5381 164 : if (papszGeolocationInfo != nullptr)
5382 : {
5383 : // Look for geolocation datasets.
5384 : const char *pszDSName =
5385 10 : CSLFetchNameValue(papszGeolocationInfo, "X_DATASET");
5386 10 : if (pszDSName != nullptr)
5387 10 : hDS_X = GDALOpenShared(pszDSName, GA_ReadOnly);
5388 10 : pszDSName = CSLFetchNameValue(papszGeolocationInfo, "Y_DATASET");
5389 10 : if (pszDSName != nullptr)
5390 10 : hDS_Y = GDALOpenShared(pszDSName, GA_ReadOnly);
5391 :
5392 10 : if (hDS_X != nullptr && hDS_Y != nullptr)
5393 : {
5394 10 : int nBand = std::max(1, atoi(CSLFetchNameValueDef(
5395 10 : papszGeolocationInfo, "X_BAND", "0")));
5396 10 : hBand_X = GDALGetRasterBand(hDS_X, nBand);
5397 10 : nBand = std::max(1, atoi(CSLFetchNameValueDef(papszGeolocationInfo,
5398 10 : "Y_BAND", "0")));
5399 10 : hBand_Y = GDALGetRasterBand(hDS_Y, nBand);
5400 :
5401 : // If geoloc bands are found, do basic validation based on their
5402 : // dimensions.
5403 10 : if (hBand_X != nullptr && hBand_Y != nullptr)
5404 : {
5405 10 : int nXSize_XBand = GDALGetRasterXSize(hDS_X);
5406 10 : int nYSize_XBand = GDALGetRasterYSize(hDS_X);
5407 10 : int nXSize_YBand = GDALGetRasterXSize(hDS_Y);
5408 10 : int nYSize_YBand = GDALGetRasterYSize(hDS_Y);
5409 :
5410 : // TODO 1D geolocation arrays not implemented.
5411 10 : if (nYSize_XBand == 1 && nYSize_YBand == 1)
5412 : {
5413 0 : bHasGeoloc = false;
5414 0 : CPLDebug("GDAL_netCDF",
5415 : "1D GEOLOCATION arrays not supported yet");
5416 : }
5417 : // 2D bands must have same sizes as the raster bands.
5418 10 : else if (nXSize_XBand != nRasterXSize ||
5419 10 : nYSize_XBand != nRasterYSize ||
5420 10 : nXSize_YBand != nRasterXSize ||
5421 10 : nYSize_YBand != nRasterYSize)
5422 : {
5423 0 : bHasGeoloc = false;
5424 0 : CPLDebug("GDAL_netCDF",
5425 : "GEOLOCATION array sizes (%dx%d %dx%d) differ "
5426 : "from raster (%dx%d), not supported",
5427 : nXSize_XBand, nYSize_XBand, nXSize_YBand,
5428 : nYSize_YBand, nRasterXSize, nRasterYSize);
5429 : }
5430 : else
5431 : {
5432 10 : bHasGeoloc = true;
5433 10 : CPLDebug("GDAL_netCDF",
5434 : "dataset has GEOLOCATION information, will try to "
5435 : "write it");
5436 : }
5437 : }
5438 : }
5439 : }
5440 :
5441 : // Process projection options.
5442 164 : if (bIsProjected)
5443 : {
5444 : bool bIsCfProjection =
5445 50 : oSRS.exportToCF1(nullptr, nullptr, nullptr, nullptr) == OGRERR_NONE;
5446 50 : bWriteGridMapping = true;
5447 50 : bWriteGDALTags = CPL_TO_BOOL(
5448 50 : CSLFetchBoolean(papszCreationOptions, "WRITE_GDAL_TAGS", TRUE));
5449 : // Force WRITE_GDAL_TAGS if is not a CF projection.
5450 50 : if (!bWriteGDALTags && !bIsCfProjection)
5451 0 : bWriteGDALTags = true;
5452 50 : if (bWriteGDALTags)
5453 50 : bWriteGeoTransform = true;
5454 :
5455 : // Write lon/lat: default is NO, except if has geolocation.
5456 : // With IF_NEEDED: write if has geoloc or is not CF projection.
5457 : const char *pszValue =
5458 50 : CSLFetchNameValue(papszCreationOptions, "WRITE_LONLAT");
5459 50 : if (pszValue)
5460 : {
5461 2 : if (EQUAL(pszValue, "IF_NEEDED"))
5462 : {
5463 0 : bWriteLonLat = bHasGeoloc || !bIsCfProjection;
5464 : }
5465 : else
5466 : {
5467 2 : bWriteLonLat = CPLTestBool(pszValue);
5468 : }
5469 : }
5470 : else
5471 : {
5472 48 : bWriteLonLat = bHasGeoloc;
5473 : }
5474 :
5475 : // Save value of pszCFCoordinates for later.
5476 50 : if (bWriteLonLat)
5477 : {
5478 4 : pszCFCoordinates = NCDF_LONLAT;
5479 : }
5480 : }
5481 : else
5482 : {
5483 : // Files without a Datum will not have a grid_mapping variable and
5484 : // geographic information.
5485 114 : bWriteGridMapping = bIsGeographic;
5486 :
5487 114 : if (bHasGeoloc)
5488 : {
5489 8 : bWriteLonLat = true;
5490 : }
5491 : else
5492 : {
5493 106 : bWriteGDALTags = CPL_TO_BOOL(CSLFetchBoolean(
5494 106 : papszCreationOptions, "WRITE_GDAL_TAGS", bWriteGridMapping));
5495 106 : if (bWriteGDALTags)
5496 88 : bWriteGeoTransform = true;
5497 :
5498 106 : const char *pszValue = CSLFetchNameValueDef(papszCreationOptions,
5499 : "WRITE_LONLAT", "YES");
5500 106 : if (EQUAL(pszValue, "IF_NEEDED"))
5501 0 : bWriteLonLat = true;
5502 : else
5503 106 : bWriteLonLat = CPLTestBool(pszValue);
5504 : // Don't write lon/lat if no source geotransform.
5505 106 : if (!m_bHasGeoTransform)
5506 0 : bWriteLonLat = false;
5507 : // If we don't write lon/lat, set dimnames to X/Y and write gdal
5508 : // tags.
5509 106 : if (!bWriteLonLat)
5510 : {
5511 0 : CPLError(CE_Warning, CPLE_AppDefined,
5512 : "creating geographic file without lon/lat values!");
5513 0 : if (m_bHasGeoTransform)
5514 : {
5515 0 : bWriteGDALTags = true; // Not desirable if no geotransform.
5516 0 : bWriteGeoTransform = true;
5517 : }
5518 : }
5519 : }
5520 : }
5521 :
5522 : // Make sure we write grid_mapping if we need to write GDAL tags.
5523 164 : if (bWriteGDALTags)
5524 138 : bWriteGridMapping = true;
5525 :
5526 : // bottom-up value: new driver is bottom-up by default.
5527 : // Override with WRITE_BOTTOMUP.
5528 164 : bBottomUp = CPL_TO_BOOL(
5529 164 : CSLFetchBoolean(papszCreationOptions, "WRITE_BOTTOMUP", TRUE));
5530 :
5531 164 : if (bDefsOnly)
5532 : {
5533 82 : CPLDebug(
5534 : "GDAL_netCDF",
5535 : "bIsProjected=%d bIsGeographic=%d bWriteGridMapping=%d "
5536 : "bWriteGDALTags=%d bWriteLonLat=%d bBottomUp=%d bHasGeoloc=%d",
5537 82 : static_cast<int>(bIsProjected), static_cast<int>(bIsGeographic),
5538 : static_cast<int>(bWriteGridMapping),
5539 : static_cast<int>(bWriteGDALTags), static_cast<int>(bWriteLonLat),
5540 82 : static_cast<int>(bBottomUp), static_cast<int>(bHasGeoloc));
5541 : }
5542 :
5543 : // Exit if nothing to do.
5544 164 : if (!bIsProjected && !bWriteLonLat)
5545 0 : return CE_None;
5546 :
5547 : // Define dimension names.
5548 :
5549 164 : constexpr const char *ROTATED_POLE_VAR_NAME = "rotated_pole";
5550 :
5551 164 : if (bDefsOnly)
5552 : {
5553 82 : int nVarLonID = -1;
5554 82 : int nVarLatID = -1;
5555 82 : int nVarXID = -1;
5556 82 : int nVarYID = -1;
5557 :
5558 82 : m_bAddedProjectionVarsDefs = true;
5559 :
5560 : // Make sure we are in define mode.
5561 82 : SetDefineMode(true);
5562 :
5563 : // Write projection attributes.
5564 82 : if (bWriteGridMapping)
5565 : {
5566 69 : const int NCDFVarID = NCDFWriteSRSVariable(
5567 : cdfid, &oSRS, &pszCFProjection, bWriteGDALTags);
5568 69 : if (NCDFVarID < 0)
5569 0 : return CE_Failure;
5570 :
5571 : // Optional GDAL custom projection tags.
5572 69 : if (bWriteGDALTags)
5573 : {
5574 138 : CPLString osGeoTransform;
5575 483 : for (int i = 0; i < 6; i++)
5576 : {
5577 414 : osGeoTransform += CPLSPrintf("%.17g ", m_gt[i]);
5578 : }
5579 69 : CPLDebug("GDAL_netCDF", "szGeoTransform = %s",
5580 : osGeoTransform.c_str());
5581 :
5582 : // if( strlen(pszProj4Defn) > 0 ) {
5583 : // nc_put_att_text(cdfid, NCDFVarID, "proj4",
5584 : // strlen(pszProj4Defn), pszProj4Defn);
5585 : // }
5586 :
5587 : // For now, write the geotransform for back-compat or else
5588 : // the old (1.8.1) driver overrides the CF geotransform with
5589 : // empty values from dfNN, dfSN, dfEE, dfWE;
5590 :
5591 : // TODO: fix this in 1.8 branch, and then remove this here.
5592 69 : if (bWriteGeoTransform && m_bHasGeoTransform)
5593 : {
5594 : {
5595 68 : const int status = nc_put_att_text(
5596 : cdfid, NCDFVarID, NCDF_GEOTRANSFORM,
5597 : osGeoTransform.size(), osGeoTransform.c_str());
5598 68 : NCDF_ERR(status);
5599 : }
5600 : }
5601 : }
5602 :
5603 : // Write projection variable to band variable.
5604 : // Need to call later if there are no bands.
5605 69 : AddGridMappingRef();
5606 : } // end if( bWriteGridMapping )
5607 :
5608 : // Write CF Projection vars.
5609 :
5610 82 : const bool bIsRotatedPole =
5611 151 : pszCFProjection != nullptr &&
5612 69 : EQUAL(pszCFProjection, ROTATED_POLE_VAR_NAME);
5613 82 : if (bIsRotatedPole)
5614 : {
5615 : // Rename dims to rlat/rlon.
5616 : papszDimName
5617 0 : .Clear(); // If we add other dims one day, this has to change
5618 0 : papszDimName.AddString(NCDF_DIMNAME_RLAT);
5619 0 : papszDimName.AddString(NCDF_DIMNAME_RLON);
5620 :
5621 0 : int status = nc_rename_dim(cdfid, nYDimID, NCDF_DIMNAME_RLAT);
5622 0 : NCDF_ERR(status);
5623 0 : status = nc_rename_dim(cdfid, nXDimID, NCDF_DIMNAME_RLON);
5624 0 : NCDF_ERR(status);
5625 : }
5626 : // Rename dimensions if lon/lat.
5627 82 : else if (!bIsProjected && !bHasGeoloc)
5628 : {
5629 : // Rename dims to lat/lon.
5630 : papszDimName
5631 53 : .Clear(); // If we add other dims one day, this has to change
5632 53 : papszDimName.AddString(NCDF_DIMNAME_LAT);
5633 53 : papszDimName.AddString(NCDF_DIMNAME_LON);
5634 :
5635 53 : int status = nc_rename_dim(cdfid, nYDimID, NCDF_DIMNAME_LAT);
5636 53 : NCDF_ERR(status);
5637 53 : status = nc_rename_dim(cdfid, nXDimID, NCDF_DIMNAME_LON);
5638 53 : NCDF_ERR(status);
5639 : }
5640 :
5641 : // Write X/Y attributes.
5642 : else /* if( bIsProjected || bHasGeoloc ) */
5643 : {
5644 : // X
5645 : int anXDims[1];
5646 29 : anXDims[0] = nXDimID;
5647 29 : CPLDebug("GDAL_netCDF", "nc_def_var(%d,%s,%d)", cdfid,
5648 : CF_PROJ_X_VAR_NAME, NC_DOUBLE);
5649 29 : int status = nc_def_var(cdfid, CF_PROJ_X_VAR_NAME, NC_DOUBLE, 1,
5650 : anXDims, &nVarXID);
5651 29 : NCDF_ERR(status);
5652 :
5653 : // Y
5654 : int anYDims[1];
5655 29 : anYDims[0] = nYDimID;
5656 29 : CPLDebug("GDAL_netCDF", "nc_def_var(%d,%s,%d)", cdfid,
5657 : CF_PROJ_Y_VAR_NAME, NC_DOUBLE);
5658 29 : status = nc_def_var(cdfid, CF_PROJ_Y_VAR_NAME, NC_DOUBLE, 1,
5659 : anYDims, &nVarYID);
5660 29 : NCDF_ERR(status);
5661 :
5662 29 : if (bIsProjected)
5663 : {
5664 25 : NCDFWriteXYVarsAttributes(this->vcdf, nVarXID, nVarYID, &oSRS);
5665 : }
5666 : else
5667 : {
5668 4 : CPLAssert(bHasGeoloc);
5669 : try
5670 : {
5671 4 : vcdf.nc_put_vatt_text(nVarXID, CF_AXIS, CF_SG_X_AXIS);
5672 4 : vcdf.nc_put_vatt_text(nVarXID, CF_LNG_NAME,
5673 : "x-coordinate in Cartesian system");
5674 4 : vcdf.nc_put_vatt_text(nVarXID, CF_UNITS, "m");
5675 4 : vcdf.nc_put_vatt_text(nVarYID, CF_AXIS, CF_SG_Y_AXIS);
5676 4 : vcdf.nc_put_vatt_text(nVarYID, CF_LNG_NAME,
5677 : "y-coordinate in Cartesian system");
5678 4 : vcdf.nc_put_vatt_text(nVarYID, CF_UNITS, "m");
5679 :
5680 4 : pszCFCoordinates = NCDF_LONLAT;
5681 : }
5682 0 : catch (nccfdriver::SG_Exception &e)
5683 : {
5684 0 : CPLError(CE_Failure, CPLE_FileIO, "%s", e.get_err_msg());
5685 0 : return CE_Failure;
5686 : }
5687 : }
5688 : }
5689 :
5690 : // Write lat/lon attributes if needed.
5691 82 : if (bWriteLonLat)
5692 : {
5693 59 : int *panLatDims = nullptr;
5694 59 : int *panLonDims = nullptr;
5695 59 : int nLatDims = -1;
5696 59 : int nLonDims = -1;
5697 :
5698 : // Get information.
5699 59 : if (bHasGeoloc)
5700 : {
5701 : // Geoloc
5702 5 : nLatDims = 2;
5703 : panLatDims =
5704 5 : static_cast<int *>(CPLCalloc(nLatDims, sizeof(int)));
5705 5 : panLatDims[0] = nYDimID;
5706 5 : panLatDims[1] = nXDimID;
5707 5 : nLonDims = 2;
5708 : panLonDims =
5709 5 : static_cast<int *>(CPLCalloc(nLonDims, sizeof(int)));
5710 5 : panLonDims[0] = nYDimID;
5711 5 : panLonDims[1] = nXDimID;
5712 : }
5713 54 : else if (bIsProjected)
5714 : {
5715 : // Projected
5716 1 : nLatDims = 2;
5717 : panLatDims =
5718 1 : static_cast<int *>(CPLCalloc(nLatDims, sizeof(int)));
5719 1 : panLatDims[0] = nYDimID;
5720 1 : panLatDims[1] = nXDimID;
5721 1 : nLonDims = 2;
5722 : panLonDims =
5723 1 : static_cast<int *>(CPLCalloc(nLonDims, sizeof(int)));
5724 1 : panLonDims[0] = nYDimID;
5725 1 : panLonDims[1] = nXDimID;
5726 : }
5727 : else
5728 : {
5729 : // Geographic
5730 53 : nLatDims = 1;
5731 : panLatDims =
5732 53 : static_cast<int *>(CPLCalloc(nLatDims, sizeof(int)));
5733 53 : panLatDims[0] = nYDimID;
5734 53 : nLonDims = 1;
5735 : panLonDims =
5736 53 : static_cast<int *>(CPLCalloc(nLonDims, sizeof(int)));
5737 53 : panLonDims[0] = nXDimID;
5738 : }
5739 :
5740 59 : nc_type eLonLatType = NC_NAT;
5741 59 : if (bIsProjected)
5742 : {
5743 2 : eLonLatType = NC_FLOAT;
5744 4 : const char *pszValue = CSLFetchNameValueDef(
5745 2 : papszCreationOptions, "TYPE_LONLAT", "FLOAT");
5746 2 : if (EQUAL(pszValue, "DOUBLE"))
5747 0 : eLonLatType = NC_DOUBLE;
5748 : }
5749 : else
5750 : {
5751 57 : eLonLatType = NC_DOUBLE;
5752 114 : const char *pszValue = CSLFetchNameValueDef(
5753 57 : papszCreationOptions, "TYPE_LONLAT", "DOUBLE");
5754 57 : if (EQUAL(pszValue, "FLOAT"))
5755 0 : eLonLatType = NC_FLOAT;
5756 : }
5757 :
5758 : // Def vars and attributes.
5759 : {
5760 59 : const char *pszVarName =
5761 59 : bIsRotatedPole ? NCDF_DIMNAME_RLAT : CF_LATITUDE_VAR_NAME;
5762 59 : int status = nc_def_var(cdfid, pszVarName, eLonLatType,
5763 : nLatDims, panLatDims, &nVarLatID);
5764 59 : CPLDebug("GDAL_netCDF", "nc_def_var(%d,%s,%d,%d,-,-) got id %d",
5765 : cdfid, pszVarName, eLonLatType, nLatDims, nVarLatID);
5766 59 : NCDF_ERR(status);
5767 59 : DefVarDeflate(nVarLatID, false); // Don't set chunking.
5768 : }
5769 :
5770 : {
5771 59 : const char *pszVarName =
5772 59 : bIsRotatedPole ? NCDF_DIMNAME_RLON : CF_LONGITUDE_VAR_NAME;
5773 59 : int status = nc_def_var(cdfid, pszVarName, eLonLatType,
5774 : nLonDims, panLonDims, &nVarLonID);
5775 59 : CPLDebug("GDAL_netCDF", "nc_def_var(%d,%s,%d,%d,-,-) got id %d",
5776 : cdfid, pszVarName, eLonLatType, nLatDims, nVarLonID);
5777 59 : NCDF_ERR(status);
5778 59 : DefVarDeflate(nVarLonID, false); // Don't set chunking.
5779 : }
5780 :
5781 59 : if (bIsRotatedPole)
5782 0 : NCDFWriteRLonRLatVarsAttributes(this->vcdf, nVarLonID,
5783 : nVarLatID);
5784 : else
5785 59 : NCDFWriteLonLatVarsAttributes(this->vcdf, nVarLonID, nVarLatID);
5786 :
5787 59 : CPLFree(panLatDims);
5788 59 : CPLFree(panLonDims);
5789 : }
5790 : }
5791 :
5792 164 : if (!bDefsOnly)
5793 : {
5794 82 : m_bAddedProjectionVarsData = true;
5795 :
5796 82 : int nVarXID = -1;
5797 82 : int nVarYID = -1;
5798 :
5799 82 : nc_inq_varid(cdfid, CF_PROJ_X_VAR_NAME, &nVarXID);
5800 82 : nc_inq_varid(cdfid, CF_PROJ_Y_VAR_NAME, &nVarYID);
5801 :
5802 82 : int nVarLonID = -1;
5803 82 : int nVarLatID = -1;
5804 :
5805 82 : const bool bIsRotatedPole =
5806 151 : pszCFProjection != nullptr &&
5807 69 : EQUAL(pszCFProjection, ROTATED_POLE_VAR_NAME);
5808 82 : nc_inq_varid(cdfid,
5809 : bIsRotatedPole ? NCDF_DIMNAME_RLON : CF_LONGITUDE_VAR_NAME,
5810 : &nVarLonID);
5811 82 : nc_inq_varid(cdfid,
5812 : bIsRotatedPole ? NCDF_DIMNAME_RLAT : CF_LATITUDE_VAR_NAME,
5813 : &nVarLatID);
5814 :
5815 : // Get projection values.
5816 :
5817 82 : double *padLonVal = nullptr;
5818 82 : double *padLatVal = nullptr;
5819 :
5820 82 : if (bIsProjected)
5821 : {
5822 25 : OGRSpatialReference *poLatLonSRS = nullptr;
5823 25 : OGRCoordinateTransformation *poTransform = nullptr;
5824 :
5825 : size_t startX[1];
5826 : size_t countX[1];
5827 : size_t startY[1];
5828 : size_t countY[1];
5829 :
5830 25 : CPLDebug("GDAL_netCDF", "Getting (X,Y) values");
5831 :
5832 : double *padXVal =
5833 25 : static_cast<double *>(CPLMalloc(nRasterXSize * sizeof(double)));
5834 : double *padYVal =
5835 25 : static_cast<double *>(CPLMalloc(nRasterYSize * sizeof(double)));
5836 :
5837 : // Get Y values.
5838 25 : const double dfY0 = (!bBottomUp) ? m_gt[3] :
5839 : // Invert latitude values.
5840 25 : m_gt[3] + (m_gt[5] * nRasterYSize);
5841 25 : const double dfDY = m_gt[5];
5842 :
5843 1456 : for (int j = 0; j < nRasterYSize; j++)
5844 : {
5845 : // The data point is centered inside the pixel.
5846 1431 : if (!bBottomUp)
5847 0 : padYVal[j] = dfY0 + (j + 0.5) * dfDY;
5848 : else // Invert latitude values.
5849 1431 : padYVal[j] = dfY0 - (j + 0.5) * dfDY;
5850 : }
5851 25 : startX[0] = 0;
5852 25 : countX[0] = nRasterXSize;
5853 :
5854 : // Get X values.
5855 25 : const double dfX0 = m_gt[0];
5856 25 : const double dfDX = m_gt[1];
5857 :
5858 1477 : for (int i = 0; i < nRasterXSize; i++)
5859 : {
5860 : // The data point is centered inside the pixel.
5861 1452 : padXVal[i] = dfX0 + (i + 0.5) * dfDX;
5862 : }
5863 25 : startY[0] = 0;
5864 25 : countY[0] = nRasterYSize;
5865 :
5866 : // Write X/Y values.
5867 :
5868 : // Make sure we are in data mode.
5869 25 : SetDefineMode(false);
5870 :
5871 25 : CPLDebug("GDAL_netCDF", "Writing X values");
5872 : int status =
5873 25 : nc_put_vara_double(cdfid, nVarXID, startX, countX, padXVal);
5874 25 : NCDF_ERR(status);
5875 :
5876 25 : CPLDebug("GDAL_netCDF", "Writing Y values");
5877 : status =
5878 25 : nc_put_vara_double(cdfid, nVarYID, startY, countY, padYVal);
5879 25 : NCDF_ERR(status);
5880 :
5881 25 : if (pfnProgress)
5882 21 : pfnProgress(0.20, nullptr, pProgressData);
5883 :
5884 : // Write lon/lat arrays (CF coordinates) if requested.
5885 :
5886 : // Get OGR transform if GEOLOCATION is not available.
5887 25 : if (bWriteLonLat && !bHasGeoloc)
5888 : {
5889 1 : poLatLonSRS = m_oSRS.CloneGeogCS();
5890 1 : if (poLatLonSRS != nullptr)
5891 : {
5892 1 : poLatLonSRS->SetAxisMappingStrategy(
5893 : OAMS_TRADITIONAL_GIS_ORDER);
5894 : poTransform =
5895 1 : OGRCreateCoordinateTransformation(&m_oSRS, poLatLonSRS);
5896 : }
5897 : // If no OGR transform, then don't write CF lon/lat.
5898 1 : if (poTransform == nullptr)
5899 : {
5900 0 : CPLError(CE_Failure, CPLE_AppDefined,
5901 : "Unable to get Coordinate Transform");
5902 0 : bWriteLonLat = false;
5903 : }
5904 : }
5905 :
5906 25 : if (bWriteLonLat)
5907 : {
5908 2 : if (!bHasGeoloc)
5909 1 : CPLDebug("GDAL_netCDF", "Transforming (X,Y)->(lon,lat)");
5910 : else
5911 1 : CPLDebug("GDAL_netCDF",
5912 : "Writing (lon,lat) from GEOLOCATION arrays");
5913 :
5914 2 : bool bOK = true;
5915 2 : double dfProgress = 0.2;
5916 :
5917 2 : size_t start[] = {0, 0};
5918 2 : size_t count[] = {1, (size_t)nRasterXSize};
5919 : padLatVal = static_cast<double *>(
5920 2 : CPLMalloc(nRasterXSize * sizeof(double)));
5921 : padLonVal = static_cast<double *>(
5922 2 : CPLMalloc(nRasterXSize * sizeof(double)));
5923 :
5924 61 : for (int j = 0; j < nRasterYSize && bOK && status == NC_NOERR;
5925 : j++)
5926 : {
5927 59 : start[0] = j;
5928 :
5929 : // Get values from geotransform.
5930 59 : if (!bHasGeoloc)
5931 : {
5932 : // Fill values to transform.
5933 420 : for (int i = 0; i < nRasterXSize; i++)
5934 : {
5935 400 : padLatVal[i] = padYVal[j];
5936 400 : padLonVal[i] = padXVal[i];
5937 : }
5938 :
5939 : // Do the transform.
5940 20 : bOK = CPL_TO_BOOL(poTransform->Transform(
5941 20 : nRasterXSize, padLonVal, padLatVal, nullptr));
5942 20 : if (!bOK)
5943 : {
5944 0 : CPLError(CE_Failure, CPLE_AppDefined,
5945 : "Unable to Transform (X,Y) to (lon,lat).");
5946 : }
5947 : }
5948 : // Get values from geoloc arrays.
5949 : else
5950 : {
5951 39 : CPLErr eErr = GDALRasterIO(
5952 : hBand_Y, GF_Read, 0, j, nRasterXSize, 1, padLatVal,
5953 : nRasterXSize, 1, GDT_Float64, 0, 0);
5954 39 : if (eErr == CE_None)
5955 : {
5956 39 : eErr = GDALRasterIO(
5957 : hBand_X, GF_Read, 0, j, nRasterXSize, 1,
5958 : padLonVal, nRasterXSize, 1, GDT_Float64, 0, 0);
5959 : }
5960 :
5961 39 : if (eErr == CE_None)
5962 : {
5963 39 : bOK = true;
5964 : }
5965 : else
5966 : {
5967 0 : bOK = false;
5968 0 : CPLError(CE_Failure, CPLE_AppDefined,
5969 : "Unable to get scanline %d", j);
5970 : }
5971 : }
5972 :
5973 : // Write data.
5974 59 : if (bOK)
5975 : {
5976 59 : status = nc_put_vara_double(cdfid, nVarLatID, start,
5977 : count, padLatVal);
5978 59 : NCDF_ERR(status);
5979 59 : status = nc_put_vara_double(cdfid, nVarLonID, start,
5980 : count, padLonVal);
5981 59 : NCDF_ERR(status);
5982 : }
5983 :
5984 59 : if (pfnProgress && (nRasterYSize / 10) > 0 &&
5985 59 : (j % (nRasterYSize / 10) == 0))
5986 : {
5987 23 : dfProgress += 0.08;
5988 23 : pfnProgress(dfProgress, nullptr, pProgressData);
5989 : }
5990 : }
5991 : }
5992 :
5993 25 : if (poLatLonSRS != nullptr)
5994 1 : delete poLatLonSRS;
5995 25 : if (poTransform != nullptr)
5996 1 : delete poTransform;
5997 :
5998 25 : CPLFree(padXVal);
5999 25 : CPLFree(padYVal);
6000 : } // Projected
6001 :
6002 : // If not projected/geographic and has geoloc
6003 57 : else if (!bIsGeographic && bHasGeoloc)
6004 : {
6005 : // Use
6006 : // https://cfconventions.org/Data/cf-conventions/cf-conventions-1.9/cf-conventions.html#_two_dimensional_latitude_longitude_coordinate_variables
6007 :
6008 4 : bool bOK = true;
6009 4 : double dfProgress = 0.2;
6010 :
6011 : // Make sure we are in data mode.
6012 4 : SetDefineMode(false);
6013 :
6014 : size_t startX[1];
6015 : size_t countX[1];
6016 : size_t startY[1];
6017 : size_t countY[1];
6018 4 : startX[0] = 0;
6019 4 : countX[0] = nRasterXSize;
6020 :
6021 4 : startY[0] = 0;
6022 4 : countY[0] = nRasterYSize;
6023 :
6024 8 : std::vector<double> adfXVal(nRasterXSize);
6025 16 : for (int i = 0; i < nRasterXSize; i++)
6026 12 : adfXVal[i] = i;
6027 :
6028 8 : std::vector<double> adfYVal(nRasterYSize);
6029 12 : for (int i = 0; i < nRasterYSize; i++)
6030 8 : adfYVal[i] = bBottomUp ? nRasterYSize - 1 - i : i;
6031 :
6032 4 : CPLDebug("GDAL_netCDF", "Writing X values");
6033 4 : int status = nc_put_vara_double(cdfid, nVarXID, startX, countX,
6034 4 : adfXVal.data());
6035 4 : NCDF_ERR(status);
6036 :
6037 4 : CPLDebug("GDAL_netCDF", "Writing Y values");
6038 4 : status = nc_put_vara_double(cdfid, nVarYID, startY, countY,
6039 4 : adfYVal.data());
6040 4 : NCDF_ERR(status);
6041 :
6042 4 : if (pfnProgress)
6043 0 : pfnProgress(0.20, nullptr, pProgressData);
6044 :
6045 4 : size_t start[] = {0, 0};
6046 4 : size_t count[] = {1, (size_t)nRasterXSize};
6047 : padLatVal =
6048 4 : static_cast<double *>(CPLMalloc(nRasterXSize * sizeof(double)));
6049 : padLonVal =
6050 4 : static_cast<double *>(CPLMalloc(nRasterXSize * sizeof(double)));
6051 :
6052 12 : for (int j = 0; j < nRasterYSize && bOK && status == NC_NOERR; j++)
6053 : {
6054 8 : start[0] = j;
6055 :
6056 8 : CPLErr eErr = GDALRasterIO(hBand_Y, GF_Read, 0,
6057 8 : bBottomUp ? nRasterYSize - 1 - j : j,
6058 : nRasterXSize, 1, padLatVal,
6059 : nRasterXSize, 1, GDT_Float64, 0, 0);
6060 8 : if (eErr == CE_None)
6061 : {
6062 8 : eErr = GDALRasterIO(hBand_X, GF_Read, 0,
6063 8 : bBottomUp ? nRasterYSize - 1 - j : j,
6064 : nRasterXSize, 1, padLonVal,
6065 : nRasterXSize, 1, GDT_Float64, 0, 0);
6066 : }
6067 :
6068 8 : if (eErr == CE_None)
6069 : {
6070 8 : bOK = true;
6071 : }
6072 : else
6073 : {
6074 0 : bOK = false;
6075 0 : CPLError(CE_Failure, CPLE_AppDefined,
6076 : "Unable to get scanline %d", j);
6077 : }
6078 :
6079 : // Write data.
6080 8 : if (bOK)
6081 : {
6082 8 : status = nc_put_vara_double(cdfid, nVarLatID, start, count,
6083 : padLatVal);
6084 8 : NCDF_ERR(status);
6085 8 : status = nc_put_vara_double(cdfid, nVarLonID, start, count,
6086 : padLonVal);
6087 8 : NCDF_ERR(status);
6088 : }
6089 :
6090 8 : if (pfnProgress && (nRasterYSize / 10) > 0 &&
6091 0 : (j % (nRasterYSize / 10) == 0))
6092 : {
6093 0 : dfProgress += 0.08;
6094 0 : pfnProgress(dfProgress, nullptr, pProgressData);
6095 : }
6096 4 : }
6097 : }
6098 :
6099 : // If not projected, assume geographic to catch grids without Datum.
6100 53 : else if (bWriteLonLat)
6101 : {
6102 : // Get latitude values.
6103 53 : const double dfY0 = (!bBottomUp) ? m_gt[3] :
6104 : // Invert latitude values.
6105 53 : m_gt[3] + (m_gt[5] * nRasterYSize);
6106 53 : const double dfDY = m_gt[5];
6107 :
6108 : // Override lat values with the ones in GEOLOCATION/Y_VALUES.
6109 53 : if (netCDFDataset::GetMetadataItem("Y_VALUES", "GEOLOCATION") !=
6110 : nullptr)
6111 : {
6112 0 : int nTemp = 0;
6113 0 : padLatVal = Get1DGeolocation("Y_VALUES", nTemp);
6114 : // Make sure we got the correct amount, if not fallback to GT */
6115 : // could add test fabs(fabs(padLatVal[0]) - fabs(dfY0)) <= 0.1))
6116 0 : if (nTemp == nRasterYSize)
6117 : {
6118 0 : CPLDebug(
6119 : "GDAL_netCDF",
6120 : "Using Y_VALUES geolocation metadata for lat values");
6121 : }
6122 : else
6123 : {
6124 0 : CPLDebug("GDAL_netCDF",
6125 : "Got %d elements from Y_VALUES geolocation "
6126 : "metadata, need %d",
6127 : nTemp, nRasterYSize);
6128 0 : if (padLatVal)
6129 : {
6130 0 : CPLFree(padLatVal);
6131 0 : padLatVal = nullptr;
6132 : }
6133 : }
6134 : }
6135 :
6136 53 : if (padLatVal == nullptr)
6137 : {
6138 : padLatVal = static_cast<double *>(
6139 53 : CPLMalloc(nRasterYSize * sizeof(double)));
6140 7105 : for (int i = 0; i < nRasterYSize; i++)
6141 : {
6142 : // The data point is centered inside the pixel.
6143 7052 : if (!bBottomUp)
6144 0 : padLatVal[i] = dfY0 + (i + 0.5) * dfDY;
6145 : else // Invert latitude values.
6146 7052 : padLatVal[i] = dfY0 - (i + 0.5) * dfDY;
6147 : }
6148 : }
6149 :
6150 53 : size_t startLat[1] = {0};
6151 53 : size_t countLat[1] = {static_cast<size_t>(nRasterYSize)};
6152 :
6153 : // Get longitude values.
6154 53 : const double dfX0 = m_gt[0];
6155 53 : const double dfDX = m_gt[1];
6156 :
6157 : padLonVal =
6158 53 : static_cast<double *>(CPLMalloc(nRasterXSize * sizeof(double)));
6159 7157 : for (int i = 0; i < nRasterXSize; i++)
6160 : {
6161 : // The data point is centered inside the pixel.
6162 7104 : padLonVal[i] = dfX0 + (i + 0.5) * dfDX;
6163 : }
6164 :
6165 53 : size_t startLon[1] = {0};
6166 53 : size_t countLon[1] = {static_cast<size_t>(nRasterXSize)};
6167 :
6168 : // Write latitude and longitude values.
6169 :
6170 : // Make sure we are in data mode.
6171 53 : SetDefineMode(false);
6172 :
6173 : // Write values.
6174 53 : CPLDebug("GDAL_netCDF", "Writing lat values");
6175 :
6176 53 : int status = nc_put_vara_double(cdfid, nVarLatID, startLat,
6177 : countLat, padLatVal);
6178 53 : NCDF_ERR(status);
6179 :
6180 53 : CPLDebug("GDAL_netCDF", "Writing lon values");
6181 53 : status = nc_put_vara_double(cdfid, nVarLonID, startLon, countLon,
6182 : padLonVal);
6183 53 : NCDF_ERR(status);
6184 :
6185 : } // Not projected.
6186 :
6187 82 : CPLFree(padLatVal);
6188 82 : CPLFree(padLonVal);
6189 :
6190 82 : if (pfnProgress)
6191 41 : pfnProgress(1.00, nullptr, pProgressData);
6192 : }
6193 :
6194 164 : if (hDS_X != nullptr)
6195 : {
6196 10 : GDALClose(hDS_X);
6197 : }
6198 164 : if (hDS_Y != nullptr)
6199 : {
6200 10 : GDALClose(hDS_Y);
6201 : }
6202 :
6203 164 : return CE_None;
6204 : }
6205 :
6206 : // Write Projection variable to band variable.
6207 : // Moved from AddProjectionVars() for cases when bands are added after
6208 : // projection.
6209 375 : bool netCDFDataset::AddGridMappingRef()
6210 : {
6211 375 : bool bRet = true;
6212 375 : bool bOldDefineMode = bDefineMode;
6213 :
6214 566 : if ((GetAccess() == GA_Update) && (nBands >= 1) && (GetRasterBand(1)) &&
6215 191 : ((pszCFCoordinates != nullptr && !EQUAL(pszCFCoordinates, "")) ||
6216 185 : (pszCFProjection != nullptr && !EQUAL(pszCFProjection, ""))))
6217 : {
6218 73 : bAddedGridMappingRef = true;
6219 :
6220 : // Make sure we are in define mode.
6221 73 : SetDefineMode(true);
6222 :
6223 192 : for (int i = 1; i <= nBands; i++)
6224 : {
6225 : const int nVarId =
6226 119 : static_cast<netCDFRasterBand *>(GetRasterBand(i))->nZId;
6227 :
6228 119 : if (pszCFProjection != nullptr && !EQUAL(pszCFProjection, ""))
6229 : {
6230 : int status =
6231 230 : nc_put_att_text(cdfid, nVarId, CF_GRD_MAPPING,
6232 115 : strlen(pszCFProjection), pszCFProjection);
6233 115 : NCDF_ERR(status);
6234 115 : if (status != NC_NOERR)
6235 0 : bRet = false;
6236 : }
6237 119 : if (pszCFCoordinates != nullptr && !EQUAL(pszCFCoordinates, ""))
6238 : {
6239 : int status =
6240 6 : nc_put_att_text(cdfid, nVarId, CF_COORDINATES,
6241 : strlen(pszCFCoordinates), pszCFCoordinates);
6242 6 : NCDF_ERR(status);
6243 6 : if (status != NC_NOERR)
6244 0 : bRet = false;
6245 : }
6246 : }
6247 :
6248 : // Go back to previous define mode.
6249 73 : SetDefineMode(bOldDefineMode);
6250 : }
6251 375 : return bRet;
6252 : }
6253 :
6254 : /************************************************************************/
6255 : /* GetGeoTransform() */
6256 : /************************************************************************/
6257 :
6258 117 : CPLErr netCDFDataset::GetGeoTransform(GDALGeoTransform >) const
6259 :
6260 : {
6261 117 : gt = m_gt;
6262 117 : if (m_bHasGeoTransform)
6263 86 : return CE_None;
6264 :
6265 31 : return GDALPamDataset::GetGeoTransform(gt);
6266 : }
6267 :
6268 : /************************************************************************/
6269 : /* rint() */
6270 : /************************************************************************/
6271 :
6272 0 : double netCDFDataset::rint(double dfX)
6273 : {
6274 0 : return std::round(dfX);
6275 : }
6276 :
6277 : /************************************************************************/
6278 : /* NCDFReadIsoMetadata() */
6279 : /************************************************************************/
6280 :
6281 16 : static void NCDFReadMetadataAsJson(int cdfid, CPLJSONObject &obj)
6282 : {
6283 16 : int nbAttr = 0;
6284 16 : NCDF_ERR(nc_inq_varnatts(cdfid, NC_GLOBAL, &nbAttr));
6285 :
6286 32 : std::map<std::string, CPLJSONArray> oMapNameToArray;
6287 40 : for (int l = 0; l < nbAttr; l++)
6288 : {
6289 : char szAttrName[NC_MAX_NAME + 1];
6290 24 : szAttrName[0] = 0;
6291 24 : NCDF_ERR(nc_inq_attname(cdfid, NC_GLOBAL, l, szAttrName));
6292 :
6293 24 : char *pszMetaValue = nullptr;
6294 24 : if (NCDFGetAttr(cdfid, NC_GLOBAL, szAttrName, &pszMetaValue) == CE_None)
6295 : {
6296 24 : nc_type nAttrType = NC_NAT;
6297 24 : size_t nAttrLen = 0;
6298 :
6299 24 : NCDF_ERR(nc_inq_att(cdfid, NC_GLOBAL, szAttrName, &nAttrType,
6300 : &nAttrLen));
6301 :
6302 24 : std::string osAttrName(szAttrName);
6303 24 : const auto sharpPos = osAttrName.find('#');
6304 24 : if (sharpPos == std::string::npos)
6305 : {
6306 16 : if (nAttrType == NC_DOUBLE || nAttrType == NC_FLOAT)
6307 4 : obj.Add(osAttrName, CPLAtof(pszMetaValue));
6308 : else
6309 12 : obj.Add(osAttrName, pszMetaValue);
6310 : }
6311 : else
6312 : {
6313 8 : osAttrName.resize(sharpPos);
6314 8 : auto iter = oMapNameToArray.find(osAttrName);
6315 8 : if (iter == oMapNameToArray.end())
6316 : {
6317 8 : CPLJSONArray array;
6318 4 : obj.Add(osAttrName, array);
6319 4 : oMapNameToArray[osAttrName] = array;
6320 4 : array.Add(pszMetaValue);
6321 : }
6322 : else
6323 : {
6324 4 : iter->second.Add(pszMetaValue);
6325 : }
6326 : }
6327 24 : CPLFree(pszMetaValue);
6328 24 : pszMetaValue = nullptr;
6329 : }
6330 : }
6331 :
6332 16 : int nSubGroups = 0;
6333 16 : int *panSubGroupIds = nullptr;
6334 16 : NCDFGetSubGroups(cdfid, &nSubGroups, &panSubGroupIds);
6335 16 : oMapNameToArray.clear();
6336 28 : for (int i = 0; i < nSubGroups; i++)
6337 : {
6338 24 : CPLJSONObject subObj;
6339 12 : NCDFReadMetadataAsJson(panSubGroupIds[i], subObj);
6340 :
6341 24 : std::string osGroupName;
6342 12 : osGroupName.resize(NC_MAX_NAME);
6343 12 : NCDF_ERR(nc_inq_grpname(panSubGroupIds[i], &osGroupName[0]));
6344 12 : osGroupName.resize(strlen(osGroupName.data()));
6345 12 : const auto sharpPos = osGroupName.find('#');
6346 12 : if (sharpPos == std::string::npos)
6347 : {
6348 4 : obj.Add(osGroupName, subObj);
6349 : }
6350 : else
6351 : {
6352 8 : osGroupName.resize(sharpPos);
6353 8 : auto iter = oMapNameToArray.find(osGroupName);
6354 8 : if (iter == oMapNameToArray.end())
6355 : {
6356 8 : CPLJSONArray array;
6357 4 : obj.Add(osGroupName, array);
6358 4 : oMapNameToArray[osGroupName] = array;
6359 4 : array.Add(subObj);
6360 : }
6361 : else
6362 : {
6363 4 : iter->second.Add(subObj);
6364 : }
6365 : }
6366 : }
6367 16 : CPLFree(panSubGroupIds);
6368 16 : }
6369 :
6370 4 : std::string NCDFReadMetadataAsJson(int cdfid)
6371 : {
6372 8 : CPLJSONDocument oDoc;
6373 8 : CPLJSONObject oRoot = oDoc.GetRoot();
6374 4 : NCDFReadMetadataAsJson(cdfid, oRoot);
6375 8 : return oDoc.SaveAsString();
6376 : }
6377 :
6378 : /************************************************************************/
6379 : /* ReadAttributes() */
6380 : /************************************************************************/
6381 1795 : CPLErr netCDFDataset::ReadAttributes(int cdfidIn, int var)
6382 :
6383 : {
6384 1795 : char *pszVarFullName = nullptr;
6385 1795 : ERR_RET(NCDFGetVarFullName(cdfidIn, var, &pszVarFullName));
6386 :
6387 : // For metadata in Sentinel 5
6388 1795 : if (STARTS_WITH(pszVarFullName, "/METADATA/"))
6389 : {
6390 6 : for (const char *key :
6391 : {"ISO_METADATA", "ESA_METADATA", "EOP_METADATA", "QA_STATISTICS",
6392 8 : "GRANULE_DESCRIPTION", "ALGORITHM_SETTINGS"})
6393 : {
6394 14 : if (var == NC_GLOBAL &&
6395 7 : strcmp(pszVarFullName,
6396 : CPLSPrintf("/METADATA/%s/NC_GLOBAL", key)) == 0)
6397 : {
6398 1 : CPLFree(pszVarFullName);
6399 1 : CPLStringList aosList;
6400 2 : aosList.AddString(CPLString(NCDFReadMetadataAsJson(cdfidIn))
6401 1 : .replaceAll("\\/", '/'));
6402 1 : m_oMapDomainToJSon[key] = std::move(aosList);
6403 1 : return CE_None;
6404 : }
6405 : }
6406 : }
6407 1794 : if (STARTS_WITH(pszVarFullName, "/PRODUCT/SUPPORT_DATA/"))
6408 : {
6409 0 : CPLFree(pszVarFullName);
6410 0 : CPLStringList aosList;
6411 : aosList.AddString(
6412 0 : CPLString(NCDFReadMetadataAsJson(cdfidIn)).replaceAll("\\/", '/'));
6413 0 : m_oMapDomainToJSon["SUPPORT_DATA"] = std::move(aosList);
6414 0 : return CE_None;
6415 : }
6416 :
6417 1794 : size_t nMetaNameSize =
6418 1794 : sizeof(char) * (strlen(pszVarFullName) + 1 + NC_MAX_NAME + 1);
6419 1794 : char *pszMetaName = static_cast<char *>(CPLMalloc(nMetaNameSize));
6420 :
6421 1794 : int nbAttr = 0;
6422 1794 : NCDF_ERR(nc_inq_varnatts(cdfidIn, var, &nbAttr));
6423 :
6424 9029 : for (int l = 0; l < nbAttr; l++)
6425 : {
6426 : char szAttrName[NC_MAX_NAME + 1];
6427 7235 : szAttrName[0] = 0;
6428 7235 : NCDF_ERR(nc_inq_attname(cdfidIn, var, l, szAttrName));
6429 7235 : snprintf(pszMetaName, nMetaNameSize, "%s#%s", pszVarFullName,
6430 : szAttrName);
6431 :
6432 7235 : char *pszMetaTemp = nullptr;
6433 7235 : if (NCDFGetAttr(cdfidIn, var, szAttrName, &pszMetaTemp) == CE_None)
6434 : {
6435 7234 : papszMetadata =
6436 7234 : CSLSetNameValue(papszMetadata, pszMetaName, pszMetaTemp);
6437 7234 : CPLFree(pszMetaTemp);
6438 7234 : pszMetaTemp = nullptr;
6439 : }
6440 : else
6441 : {
6442 1 : CPLDebug("GDAL_netCDF", "invalid metadata %s", pszMetaName);
6443 : }
6444 : }
6445 :
6446 1794 : CPLFree(pszVarFullName);
6447 1794 : CPLFree(pszMetaName);
6448 :
6449 1794 : if (var == NC_GLOBAL)
6450 : {
6451 : // Recurse on sub-groups.
6452 522 : int nSubGroups = 0;
6453 522 : int *panSubGroupIds = nullptr;
6454 522 : NCDFGetSubGroups(cdfidIn, &nSubGroups, &panSubGroupIds);
6455 552 : for (int i = 0; i < nSubGroups; i++)
6456 : {
6457 30 : ReadAttributes(panSubGroupIds[i], var);
6458 : }
6459 522 : CPLFree(panSubGroupIds);
6460 : }
6461 :
6462 1794 : return CE_None;
6463 : }
6464 :
6465 : /************************************************************************/
6466 : /* netCDFDataset::CreateSubDatasetList() */
6467 : /************************************************************************/
6468 51 : void netCDFDataset::CreateSubDatasetList(int nGroupId)
6469 : {
6470 : char szVarStdName[NC_MAX_NAME + 1];
6471 51 : int *ponDimIds = nullptr;
6472 : nc_type nAttype;
6473 : size_t nAttlen;
6474 :
6475 51 : netCDFDataset *poDS = this;
6476 :
6477 : int nVarCount;
6478 51 : nc_inq_nvars(nGroupId, &nVarCount);
6479 :
6480 51 : const bool bListAllArrays = CPLTestBool(
6481 51 : CSLFetchNameValueDef(papszOpenOptions, "LIST_ALL_ARRAYS", "NO"));
6482 :
6483 329 : for (int nVar = 0; nVar < nVarCount; nVar++)
6484 : {
6485 :
6486 : int nDims;
6487 278 : nc_inq_varndims(nGroupId, nVar, &nDims);
6488 :
6489 278 : if ((bListAllArrays && nDims > 0) || nDims >= 2)
6490 : {
6491 158 : ponDimIds = static_cast<int *>(CPLCalloc(nDims, sizeof(int)));
6492 158 : nc_inq_vardimid(nGroupId, nVar, ponDimIds);
6493 :
6494 : // Create Sub dataset list.
6495 158 : CPLString osDim;
6496 487 : for (int i = 0; i < nDims; i++)
6497 : {
6498 : size_t nDimLen;
6499 329 : nc_inq_dimlen(nGroupId, ponDimIds[i], &nDimLen);
6500 329 : if (!osDim.empty())
6501 171 : osDim += 'x';
6502 329 : osDim += CPLSPrintf("%d", (int)nDimLen);
6503 : }
6504 158 : CPLFree(ponDimIds);
6505 :
6506 : nc_type nVarType;
6507 158 : nc_inq_vartype(nGroupId, nVar, &nVarType);
6508 158 : const char *pszType = "";
6509 158 : switch (nVarType)
6510 : {
6511 38 : case NC_BYTE:
6512 38 : pszType = "8-bit integer";
6513 38 : break;
6514 2 : case NC_CHAR:
6515 2 : pszType = "8-bit character";
6516 2 : break;
6517 6 : case NC_SHORT:
6518 6 : pszType = "16-bit integer";
6519 6 : break;
6520 10 : case NC_INT:
6521 10 : pszType = "32-bit integer";
6522 10 : break;
6523 51 : case NC_FLOAT:
6524 51 : pszType = "32-bit floating-point";
6525 51 : break;
6526 33 : case NC_DOUBLE:
6527 33 : pszType = "64-bit floating-point";
6528 33 : break;
6529 4 : case NC_UBYTE:
6530 4 : pszType = "8-bit unsigned integer";
6531 4 : break;
6532 1 : case NC_USHORT:
6533 1 : pszType = "16-bit unsigned integer";
6534 1 : break;
6535 1 : case NC_UINT:
6536 1 : pszType = "32-bit unsigned integer";
6537 1 : break;
6538 1 : case NC_INT64:
6539 1 : pszType = "64-bit integer";
6540 1 : break;
6541 1 : case NC_UINT64:
6542 1 : pszType = "64-bit unsigned integer";
6543 1 : break;
6544 10 : default:
6545 10 : break;
6546 : }
6547 :
6548 158 : char *pszName = nullptr;
6549 158 : if (NCDFGetVarFullName(nGroupId, nVar, &pszName) != CE_None)
6550 0 : continue;
6551 :
6552 158 : nSubDatasets++;
6553 :
6554 158 : nAttlen = 0;
6555 158 : nc_inq_att(nGroupId, nVar, CF_STD_NAME, &nAttype, &nAttlen);
6556 316 : if (nAttlen < sizeof(szVarStdName) &&
6557 158 : nc_get_att_text(nGroupId, nVar, CF_STD_NAME, szVarStdName) ==
6558 : NC_NOERR)
6559 : {
6560 53 : szVarStdName[nAttlen] = '\0';
6561 : }
6562 : else
6563 : {
6564 105 : snprintf(szVarStdName, sizeof(szVarStdName), "%s", pszName);
6565 : }
6566 :
6567 : char szTemp[NC_MAX_NAME + 1];
6568 158 : snprintf(szTemp, sizeof(szTemp), "SUBDATASET_%d_NAME",
6569 : nSubDatasets);
6570 :
6571 158 : if (strchr(pszName, ' ') || strchr(pszName, ':'))
6572 : {
6573 1 : poDS->papszSubDatasets = CSLSetNameValue(
6574 : poDS->papszSubDatasets, szTemp,
6575 : CPLSPrintf("NETCDF:\"%s\":\"%s\"", poDS->osFilename.c_str(),
6576 : pszName));
6577 : }
6578 : else
6579 : {
6580 157 : poDS->papszSubDatasets = CSLSetNameValue(
6581 : poDS->papszSubDatasets, szTemp,
6582 : CPLSPrintf("NETCDF:\"%s\":%s", poDS->osFilename.c_str(),
6583 : pszName));
6584 : }
6585 :
6586 158 : CPLFree(pszName);
6587 :
6588 158 : snprintf(szTemp, sizeof(szTemp), "SUBDATASET_%d_DESC",
6589 : nSubDatasets);
6590 :
6591 158 : poDS->papszSubDatasets =
6592 158 : CSLSetNameValue(poDS->papszSubDatasets, szTemp,
6593 : CPLSPrintf("[%s] %s (%s)", osDim.c_str(),
6594 : szVarStdName, pszType));
6595 : }
6596 : }
6597 :
6598 : // Recurse on sub groups.
6599 51 : int nSubGroups = 0;
6600 51 : int *panSubGroupIds = nullptr;
6601 51 : NCDFGetSubGroups(nGroupId, &nSubGroups, &panSubGroupIds);
6602 56 : for (int i = 0; i < nSubGroups; i++)
6603 : {
6604 5 : CreateSubDatasetList(panSubGroupIds[i]);
6605 : }
6606 51 : CPLFree(panSubGroupIds);
6607 51 : }
6608 :
6609 : /************************************************************************/
6610 : /* TestCapability() */
6611 : /************************************************************************/
6612 :
6613 248 : int netCDFDataset::TestCapability(const char *pszCap)
6614 : {
6615 248 : if (EQUAL(pszCap, ODsCCreateLayer))
6616 : {
6617 223 : return eAccess == GA_Update && nBands == 0 &&
6618 218 : (eMultipleLayerBehavior != SINGLE_LAYER ||
6619 229 : this->GetLayerCount() == 0 || bSGSupport);
6620 : }
6621 136 : else if (EQUAL(pszCap, ODsCZGeometries))
6622 2 : return true;
6623 :
6624 134 : return false;
6625 : }
6626 :
6627 : /************************************************************************/
6628 : /* GetLayer() */
6629 : /************************************************************************/
6630 :
6631 384 : OGRLayer *netCDFDataset::GetLayer(int nIdx)
6632 : {
6633 384 : if (nIdx < 0 || nIdx >= this->GetLayerCount())
6634 2 : return nullptr;
6635 382 : return papoLayers[nIdx].get();
6636 : }
6637 :
6638 : /************************************************************************/
6639 : /* ICreateLayer() */
6640 : /************************************************************************/
6641 :
6642 59 : OGRLayer *netCDFDataset::ICreateLayer(const char *pszName,
6643 : const OGRGeomFieldDefn *poGeomFieldDefn,
6644 : CSLConstList papszOptions)
6645 : {
6646 59 : int nLayerCDFId = cdfid;
6647 59 : if (!TestCapability(ODsCCreateLayer))
6648 0 : return nullptr;
6649 :
6650 59 : const auto eGType = poGeomFieldDefn ? poGeomFieldDefn->GetType() : wkbNone;
6651 : const auto poSpatialRef =
6652 59 : poGeomFieldDefn ? poGeomFieldDefn->GetSpatialRef() : nullptr;
6653 :
6654 118 : CPLString osNetCDFLayerName(pszName);
6655 59 : const netCDFWriterConfigLayer *poLayerConfig = nullptr;
6656 59 : if (oWriterConfig.m_bIsValid)
6657 : {
6658 : std::map<CPLString, netCDFWriterConfigLayer>::const_iterator
6659 2 : oLayerIter = oWriterConfig.m_oLayers.find(pszName);
6660 2 : if (oLayerIter != oWriterConfig.m_oLayers.end())
6661 : {
6662 1 : poLayerConfig = &(oLayerIter->second);
6663 1 : osNetCDFLayerName = poLayerConfig->m_osNetCDFName;
6664 : }
6665 : }
6666 :
6667 59 : netCDFDataset *poLayerDataset = nullptr;
6668 59 : if (eMultipleLayerBehavior == SEPARATE_FILES)
6669 : {
6670 2 : char **papszDatasetOptions = nullptr;
6671 2 : papszDatasetOptions = CSLSetNameValue(
6672 : papszDatasetOptions, "CONFIG_FILE",
6673 2 : CSLFetchNameValue(papszCreationOptions, "CONFIG_FILE"));
6674 : papszDatasetOptions =
6675 2 : CSLSetNameValue(papszDatasetOptions, "FORMAT",
6676 2 : CSLFetchNameValue(papszCreationOptions, "FORMAT"));
6677 2 : papszDatasetOptions = CSLSetNameValue(
6678 : papszDatasetOptions, "WRITE_GDAL_TAGS",
6679 2 : CSLFetchNameValue(papszCreationOptions, "WRITE_GDAL_TAGS"));
6680 : const CPLString osLayerFilename(
6681 2 : CPLFormFilenameSafe(osFilename, osNetCDFLayerName, "nc"));
6682 2 : CPLAcquireMutex(hNCMutex, 1000.0);
6683 2 : poLayerDataset =
6684 2 : CreateLL(osLayerFilename, 0, 0, 0, papszDatasetOptions);
6685 2 : CPLReleaseMutex(hNCMutex);
6686 2 : CSLDestroy(papszDatasetOptions);
6687 2 : if (poLayerDataset == nullptr)
6688 0 : return nullptr;
6689 :
6690 2 : nLayerCDFId = poLayerDataset->cdfid;
6691 2 : NCDFAddGDALHistory(nLayerCDFId, osLayerFilename, bWriteGDALVersion,
6692 2 : bWriteGDALHistory, "", "Create",
6693 : NCDF_CONVENTIONS_CF_V1_6);
6694 : }
6695 57 : else if (eMultipleLayerBehavior == SEPARATE_GROUPS)
6696 : {
6697 2 : SetDefineMode(true);
6698 :
6699 2 : nLayerCDFId = -1;
6700 2 : int status = nc_def_grp(cdfid, osNetCDFLayerName, &nLayerCDFId);
6701 2 : NCDF_ERR(status);
6702 2 : if (status != NC_NOERR)
6703 0 : return nullptr;
6704 :
6705 2 : NCDFAddGDALHistory(nLayerCDFId, osFilename, bWriteGDALVersion,
6706 2 : bWriteGDALHistory, "", "Create",
6707 : NCDF_CONVENTIONS_CF_V1_6);
6708 : }
6709 :
6710 : // Make a clone to workaround a bug in released MapServer versions
6711 : // that destroys the passed SRS instead of releasing it .
6712 59 : OGRSpatialReference *poSRS = nullptr;
6713 59 : if (poSpatialRef)
6714 : {
6715 43 : poSRS = poSpatialRef->Clone();
6716 43 : poSRS->SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
6717 : }
6718 : std::shared_ptr<netCDFLayer> poLayer(
6719 59 : new netCDFLayer(poLayerDataset ? poLayerDataset : this, nLayerCDFId,
6720 118 : osNetCDFLayerName, eGType, poSRS));
6721 59 : if (poSRS != nullptr)
6722 43 : poSRS->Release();
6723 :
6724 : // Fetch layer creation options coming from config file
6725 59 : char **papszNewOptions = CSLDuplicate(papszOptions);
6726 59 : if (oWriterConfig.m_bIsValid)
6727 : {
6728 2 : std::map<CPLString, CPLString>::const_iterator oIter;
6729 3 : for (oIter = oWriterConfig.m_oLayerCreationOptions.begin();
6730 3 : oIter != oWriterConfig.m_oLayerCreationOptions.end(); ++oIter)
6731 : {
6732 : papszNewOptions =
6733 1 : CSLSetNameValue(papszNewOptions, oIter->first, oIter->second);
6734 : }
6735 2 : if (poLayerConfig != nullptr)
6736 : {
6737 3 : for (oIter = poLayerConfig->m_oLayerCreationOptions.begin();
6738 3 : oIter != poLayerConfig->m_oLayerCreationOptions.end(); ++oIter)
6739 : {
6740 2 : papszNewOptions = CSLSetNameValue(papszNewOptions, oIter->first,
6741 2 : oIter->second);
6742 : }
6743 : }
6744 : }
6745 :
6746 59 : const bool bRet = poLayer->Create(papszNewOptions, poLayerConfig);
6747 59 : CSLDestroy(papszNewOptions);
6748 :
6749 59 : if (!bRet)
6750 : {
6751 0 : return nullptr;
6752 : }
6753 :
6754 59 : if (poLayerDataset != nullptr)
6755 2 : apoVectorDatasets.push_back(poLayerDataset);
6756 :
6757 59 : papoLayers.push_back(poLayer);
6758 59 : return poLayer.get();
6759 : }
6760 :
6761 : /************************************************************************/
6762 : /* CloneAttributes() */
6763 : /************************************************************************/
6764 :
6765 137 : bool netCDFDataset::CloneAttributes(int old_cdfid, int new_cdfid, int nSrcVarId,
6766 : int nDstVarId)
6767 : {
6768 137 : int nAttCount = -1;
6769 137 : int status = nc_inq_varnatts(old_cdfid, nSrcVarId, &nAttCount);
6770 137 : NCDF_ERR(status);
6771 :
6772 693 : for (int i = 0; i < nAttCount; i++)
6773 : {
6774 : char szName[NC_MAX_NAME + 1];
6775 556 : szName[0] = 0;
6776 556 : status = nc_inq_attname(old_cdfid, nSrcVarId, i, szName);
6777 556 : NCDF_ERR(status);
6778 :
6779 : status =
6780 556 : nc_copy_att(old_cdfid, nSrcVarId, szName, new_cdfid, nDstVarId);
6781 556 : NCDF_ERR(status);
6782 556 : if (status != NC_NOERR)
6783 0 : return false;
6784 : }
6785 :
6786 137 : return true;
6787 : }
6788 :
6789 : /************************************************************************/
6790 : /* CloneVariableContent() */
6791 : /************************************************************************/
6792 :
6793 121 : bool netCDFDataset::CloneVariableContent(int old_cdfid, int new_cdfid,
6794 : int nSrcVarId, int nDstVarId)
6795 : {
6796 121 : int nVarDimCount = -1;
6797 121 : int status = nc_inq_varndims(old_cdfid, nSrcVarId, &nVarDimCount);
6798 121 : NCDF_ERR(status);
6799 121 : int anDimIds[] = {-1, 1};
6800 121 : status = nc_inq_vardimid(old_cdfid, nSrcVarId, anDimIds);
6801 121 : NCDF_ERR(status);
6802 121 : nc_type nc_datatype = NC_NAT;
6803 121 : status = nc_inq_vartype(old_cdfid, nSrcVarId, &nc_datatype);
6804 121 : NCDF_ERR(status);
6805 121 : size_t nTypeSize = 0;
6806 121 : switch (nc_datatype)
6807 : {
6808 35 : case NC_BYTE:
6809 : case NC_CHAR:
6810 35 : nTypeSize = 1;
6811 35 : break;
6812 4 : case NC_SHORT:
6813 4 : nTypeSize = 2;
6814 4 : break;
6815 24 : case NC_INT:
6816 24 : nTypeSize = 4;
6817 24 : break;
6818 4 : case NC_FLOAT:
6819 4 : nTypeSize = 4;
6820 4 : break;
6821 43 : case NC_DOUBLE:
6822 43 : nTypeSize = 8;
6823 43 : break;
6824 2 : case NC_UBYTE:
6825 2 : nTypeSize = 1;
6826 2 : break;
6827 2 : case NC_USHORT:
6828 2 : nTypeSize = 2;
6829 2 : break;
6830 2 : case NC_UINT:
6831 2 : nTypeSize = 4;
6832 2 : break;
6833 4 : case NC_INT64:
6834 : case NC_UINT64:
6835 4 : nTypeSize = 8;
6836 4 : break;
6837 1 : case NC_STRING:
6838 1 : nTypeSize = sizeof(char *);
6839 1 : break;
6840 0 : default:
6841 : {
6842 0 : CPLError(CE_Failure, CPLE_NotSupported, "Unsupported data type: %d",
6843 : nc_datatype);
6844 0 : return false;
6845 : }
6846 : }
6847 :
6848 121 : size_t nElems = 1;
6849 : size_t anStart[NC_MAX_DIMS];
6850 : size_t anCount[NC_MAX_DIMS];
6851 121 : size_t nRecords = 1;
6852 261 : for (int i = 0; i < nVarDimCount; i++)
6853 : {
6854 140 : anStart[i] = 0;
6855 140 : if (i == 0)
6856 : {
6857 116 : anCount[i] = 1;
6858 116 : status = nc_inq_dimlen(old_cdfid, anDimIds[i], &nRecords);
6859 116 : NCDF_ERR(status);
6860 : }
6861 : else
6862 : {
6863 24 : anCount[i] = 0;
6864 24 : status = nc_inq_dimlen(old_cdfid, anDimIds[i], &anCount[i]);
6865 24 : NCDF_ERR(status);
6866 24 : nElems *= anCount[i];
6867 : }
6868 : }
6869 :
6870 : /* Workaround in some cases a netCDF bug:
6871 : * https://github.com/Unidata/netcdf-c/pull/1442 */
6872 121 : if (nRecords > 0 && nRecords < 10 * 1000 * 1000 / (nElems * nTypeSize))
6873 : {
6874 119 : nElems *= nRecords;
6875 119 : anCount[0] = nRecords;
6876 119 : nRecords = 1;
6877 : }
6878 :
6879 121 : void *pBuffer = VSI_MALLOC2_VERBOSE(nElems, nTypeSize);
6880 121 : if (pBuffer == nullptr)
6881 0 : return false;
6882 :
6883 240 : for (size_t iRecord = 0; iRecord < nRecords; iRecord++)
6884 : {
6885 119 : anStart[0] = iRecord;
6886 :
6887 119 : switch (nc_datatype)
6888 : {
6889 5 : case NC_BYTE:
6890 : status =
6891 5 : nc_get_vara_schar(old_cdfid, nSrcVarId, anStart, anCount,
6892 : static_cast<signed char *>(pBuffer));
6893 5 : if (!status)
6894 5 : status = nc_put_vara_schar(
6895 : new_cdfid, nDstVarId, anStart, anCount,
6896 : static_cast<signed char *>(pBuffer));
6897 5 : break;
6898 28 : case NC_CHAR:
6899 : status =
6900 28 : nc_get_vara_text(old_cdfid, nSrcVarId, anStart, anCount,
6901 : static_cast<char *>(pBuffer));
6902 28 : if (!status)
6903 : status =
6904 28 : nc_put_vara_text(new_cdfid, nDstVarId, anStart, anCount,
6905 : static_cast<char *>(pBuffer));
6906 28 : break;
6907 4 : case NC_SHORT:
6908 : status =
6909 4 : nc_get_vara_short(old_cdfid, nSrcVarId, anStart, anCount,
6910 : static_cast<short *>(pBuffer));
6911 4 : if (!status)
6912 4 : status = nc_put_vara_short(new_cdfid, nDstVarId, anStart,
6913 : anCount,
6914 : static_cast<short *>(pBuffer));
6915 4 : break;
6916 24 : case NC_INT:
6917 24 : status = nc_get_vara_int(old_cdfid, nSrcVarId, anStart, anCount,
6918 : static_cast<int *>(pBuffer));
6919 24 : if (!status)
6920 : status =
6921 24 : nc_put_vara_int(new_cdfid, nDstVarId, anStart, anCount,
6922 : static_cast<int *>(pBuffer));
6923 24 : break;
6924 4 : case NC_FLOAT:
6925 : status =
6926 4 : nc_get_vara_float(old_cdfid, nSrcVarId, anStart, anCount,
6927 : static_cast<float *>(pBuffer));
6928 4 : if (!status)
6929 4 : status = nc_put_vara_float(new_cdfid, nDstVarId, anStart,
6930 : anCount,
6931 : static_cast<float *>(pBuffer));
6932 4 : break;
6933 43 : case NC_DOUBLE:
6934 : status =
6935 43 : nc_get_vara_double(old_cdfid, nSrcVarId, anStart, anCount,
6936 : static_cast<double *>(pBuffer));
6937 43 : if (!status)
6938 43 : status = nc_put_vara_double(new_cdfid, nDstVarId, anStart,
6939 : anCount,
6940 : static_cast<double *>(pBuffer));
6941 43 : break;
6942 1 : case NC_STRING:
6943 : status =
6944 1 : nc_get_vara_string(old_cdfid, nSrcVarId, anStart, anCount,
6945 : static_cast<char **>(pBuffer));
6946 1 : if (!status)
6947 : {
6948 1 : status = nc_put_vara_string(
6949 : new_cdfid, nDstVarId, anStart, anCount,
6950 : static_cast<const char **>(pBuffer));
6951 1 : nc_free_string(nElems, static_cast<char **>(pBuffer));
6952 : }
6953 1 : break;
6954 :
6955 2 : case NC_UBYTE:
6956 : status =
6957 2 : nc_get_vara_uchar(old_cdfid, nSrcVarId, anStart, anCount,
6958 : static_cast<unsigned char *>(pBuffer));
6959 2 : if (!status)
6960 2 : status = nc_put_vara_uchar(
6961 : new_cdfid, nDstVarId, anStart, anCount,
6962 : static_cast<unsigned char *>(pBuffer));
6963 2 : break;
6964 2 : case NC_USHORT:
6965 : status =
6966 2 : nc_get_vara_ushort(old_cdfid, nSrcVarId, anStart, anCount,
6967 : static_cast<unsigned short *>(pBuffer));
6968 2 : if (!status)
6969 2 : status = nc_put_vara_ushort(
6970 : new_cdfid, nDstVarId, anStart, anCount,
6971 : static_cast<unsigned short *>(pBuffer));
6972 2 : break;
6973 2 : case NC_UINT:
6974 : status =
6975 2 : nc_get_vara_uint(old_cdfid, nSrcVarId, anStart, anCount,
6976 : static_cast<unsigned int *>(pBuffer));
6977 2 : if (!status)
6978 : status =
6979 2 : nc_put_vara_uint(new_cdfid, nDstVarId, anStart, anCount,
6980 : static_cast<unsigned int *>(pBuffer));
6981 2 : break;
6982 2 : case NC_INT64:
6983 : status =
6984 2 : nc_get_vara_longlong(old_cdfid, nSrcVarId, anStart, anCount,
6985 : static_cast<long long *>(pBuffer));
6986 2 : if (!status)
6987 2 : status = nc_put_vara_longlong(
6988 : new_cdfid, nDstVarId, anStart, anCount,
6989 : static_cast<long long *>(pBuffer));
6990 2 : break;
6991 2 : case NC_UINT64:
6992 2 : status = nc_get_vara_ulonglong(
6993 : old_cdfid, nSrcVarId, anStart, anCount,
6994 : static_cast<unsigned long long *>(pBuffer));
6995 2 : if (!status)
6996 2 : status = nc_put_vara_ulonglong(
6997 : new_cdfid, nDstVarId, anStart, anCount,
6998 : static_cast<unsigned long long *>(pBuffer));
6999 2 : break;
7000 0 : default:
7001 0 : status = NC_EBADTYPE;
7002 : }
7003 :
7004 119 : NCDF_ERR(status);
7005 119 : if (status != NC_NOERR)
7006 : {
7007 0 : VSIFree(pBuffer);
7008 0 : return false;
7009 : }
7010 : }
7011 :
7012 121 : VSIFree(pBuffer);
7013 121 : return true;
7014 : }
7015 :
7016 : /************************************************************************/
7017 : /* NCDFIsUnlimitedDim() */
7018 : /************************************************************************/
7019 :
7020 58 : bool NCDFIsUnlimitedDim(bool bIsNC4, int cdfid, int nDimId)
7021 : {
7022 58 : if (bIsNC4)
7023 : {
7024 16 : int nUnlimitedDims = 0;
7025 16 : nc_inq_unlimdims(cdfid, &nUnlimitedDims, nullptr);
7026 16 : bool bFound = false;
7027 16 : if (nUnlimitedDims)
7028 : {
7029 : int *panUnlimitedDimIds =
7030 16 : static_cast<int *>(CPLMalloc(sizeof(int) * nUnlimitedDims));
7031 16 : nc_inq_unlimdims(cdfid, nullptr, panUnlimitedDimIds);
7032 30 : for (int i = 0; i < nUnlimitedDims; i++)
7033 : {
7034 22 : if (panUnlimitedDimIds[i] == nDimId)
7035 : {
7036 8 : bFound = true;
7037 8 : break;
7038 : }
7039 : }
7040 16 : CPLFree(panUnlimitedDimIds);
7041 : }
7042 16 : return bFound;
7043 : }
7044 : else
7045 : {
7046 42 : int nUnlimitedDimId = -1;
7047 42 : nc_inq(cdfid, nullptr, nullptr, nullptr, &nUnlimitedDimId);
7048 42 : return nDimId == nUnlimitedDimId;
7049 : }
7050 : }
7051 :
7052 : /************************************************************************/
7053 : /* CloneGrp() */
7054 : /************************************************************************/
7055 :
7056 16 : bool netCDFDataset::CloneGrp(int nOldGrpId, int nNewGrpId, bool bIsNC4,
7057 : int nLayerId, int nDimIdToGrow, size_t nNewSize)
7058 : {
7059 : // Clone dimensions
7060 16 : int nDimCount = -1;
7061 16 : int status = nc_inq_ndims(nOldGrpId, &nDimCount);
7062 16 : NCDF_ERR(status);
7063 16 : if (nDimCount < 0 || nDimCount > NC_MAX_DIMS)
7064 0 : return false;
7065 : int anDimIds[NC_MAX_DIMS];
7066 16 : int nUnlimiDimID = -1;
7067 16 : status = nc_inq_unlimdim(nOldGrpId, &nUnlimiDimID);
7068 16 : NCDF_ERR(status);
7069 16 : if (bIsNC4)
7070 : {
7071 : // In NC4, the dimension ids of a group are not necessarily in
7072 : // [0,nDimCount-1] range
7073 8 : int nDimCount2 = -1;
7074 8 : status = nc_inq_dimids(nOldGrpId, &nDimCount2, anDimIds, FALSE);
7075 8 : NCDF_ERR(status);
7076 8 : CPLAssert(nDimCount == nDimCount2);
7077 : }
7078 : else
7079 : {
7080 36 : for (int i = 0; i < nDimCount; i++)
7081 28 : anDimIds[i] = i;
7082 : }
7083 60 : for (int i = 0; i < nDimCount; i++)
7084 : {
7085 : char szDimName[NC_MAX_NAME + 1];
7086 44 : szDimName[0] = 0;
7087 44 : size_t nLen = 0;
7088 44 : const int nDimId = anDimIds[i];
7089 44 : status = nc_inq_dim(nOldGrpId, nDimId, szDimName, &nLen);
7090 44 : NCDF_ERR(status);
7091 44 : if (NCDFIsUnlimitedDim(bIsNC4, nOldGrpId, nDimId))
7092 16 : nLen = NC_UNLIMITED;
7093 28 : else if (nDimId == nDimIdToGrow && nOldGrpId == nLayerId)
7094 13 : nLen = nNewSize;
7095 44 : int nNewDimId = -1;
7096 44 : status = nc_def_dim(nNewGrpId, szDimName, nLen, &nNewDimId);
7097 44 : NCDF_ERR(status);
7098 44 : CPLAssert(nDimId == nNewDimId);
7099 44 : if (status != NC_NOERR)
7100 : {
7101 0 : return false;
7102 : }
7103 : }
7104 :
7105 : // Clone main attributes
7106 16 : if (!CloneAttributes(nOldGrpId, nNewGrpId, NC_GLOBAL, NC_GLOBAL))
7107 : {
7108 0 : return false;
7109 : }
7110 :
7111 : // Clone variable definitions
7112 16 : int nVarCount = -1;
7113 16 : status = nc_inq_nvars(nOldGrpId, &nVarCount);
7114 16 : NCDF_ERR(status);
7115 :
7116 137 : for (int i = 0; i < nVarCount; i++)
7117 : {
7118 : char szVarName[NC_MAX_NAME + 1];
7119 121 : szVarName[0] = 0;
7120 121 : status = nc_inq_varname(nOldGrpId, i, szVarName);
7121 121 : NCDF_ERR(status);
7122 121 : nc_type nc_datatype = NC_NAT;
7123 121 : status = nc_inq_vartype(nOldGrpId, i, &nc_datatype);
7124 121 : NCDF_ERR(status);
7125 121 : int nVarDimCount = -1;
7126 121 : status = nc_inq_varndims(nOldGrpId, i, &nVarDimCount);
7127 121 : NCDF_ERR(status);
7128 121 : status = nc_inq_vardimid(nOldGrpId, i, anDimIds);
7129 121 : NCDF_ERR(status);
7130 121 : int nNewVarId = -1;
7131 121 : status = nc_def_var(nNewGrpId, szVarName, nc_datatype, nVarDimCount,
7132 : anDimIds, &nNewVarId);
7133 121 : NCDF_ERR(status);
7134 121 : CPLAssert(i == nNewVarId);
7135 121 : if (status != NC_NOERR)
7136 : {
7137 0 : return false;
7138 : }
7139 :
7140 121 : if (!CloneAttributes(nOldGrpId, nNewGrpId, i, i))
7141 : {
7142 0 : return false;
7143 : }
7144 : }
7145 :
7146 16 : status = nc_enddef(nNewGrpId);
7147 16 : NCDF_ERR(status);
7148 16 : if (status != NC_NOERR)
7149 : {
7150 0 : return false;
7151 : }
7152 :
7153 : // Clone variable content
7154 137 : for (int i = 0; i < nVarCount; i++)
7155 : {
7156 121 : if (!CloneVariableContent(nOldGrpId, nNewGrpId, i, i))
7157 : {
7158 0 : return false;
7159 : }
7160 : }
7161 :
7162 16 : return true;
7163 : }
7164 :
7165 : /************************************************************************/
7166 : /* GrowDim() */
7167 : /************************************************************************/
7168 :
7169 13 : bool netCDFDataset::GrowDim(int nLayerId, int nDimIdToGrow, size_t nNewSize)
7170 : {
7171 : int nCreationMode;
7172 : // Set nCreationMode based on eFormat.
7173 13 : switch (eFormat)
7174 : {
7175 : #ifdef NETCDF_HAS_NC2
7176 0 : case NCDF_FORMAT_NC2:
7177 0 : nCreationMode = NC_CLOBBER | NC_64BIT_OFFSET;
7178 0 : break;
7179 : #endif
7180 5 : case NCDF_FORMAT_NC4:
7181 5 : nCreationMode = NC_CLOBBER | NC_NETCDF4;
7182 5 : break;
7183 0 : case NCDF_FORMAT_NC4C:
7184 0 : nCreationMode = NC_CLOBBER | NC_NETCDF4 | NC_CLASSIC_MODEL;
7185 0 : break;
7186 8 : case NCDF_FORMAT_NC:
7187 : default:
7188 8 : nCreationMode = NC_CLOBBER;
7189 8 : break;
7190 : }
7191 :
7192 13 : int new_cdfid = -1;
7193 26 : CPLString osTmpFilename(osFilename + ".tmp");
7194 26 : CPLString osFilenameForNCCreate(osTmpFilename);
7195 : #if defined(_WIN32) && !defined(NETCDF_USES_UTF8)
7196 : if (CPLTestBool(CPLGetConfigOption("GDAL_FILENAME_IS_UTF8", "YES")))
7197 : {
7198 : char *pszTemp =
7199 : CPLRecode(osFilenameForNCCreate, CPL_ENC_UTF8, "CP_ACP");
7200 : osFilenameForNCCreate = pszTemp;
7201 : CPLFree(pszTemp);
7202 : }
7203 : #endif
7204 13 : int status = nc_create(osFilenameForNCCreate, nCreationMode, &new_cdfid);
7205 13 : NCDF_ERR(status);
7206 13 : if (status != NC_NOERR)
7207 0 : return false;
7208 :
7209 13 : if (!CloneGrp(cdfid, new_cdfid, eFormat == NCDF_FORMAT_NC4, nLayerId,
7210 : nDimIdToGrow, nNewSize))
7211 : {
7212 0 : GDAL_nc_close(new_cdfid);
7213 0 : return false;
7214 : }
7215 :
7216 13 : int nGroupCount = 0;
7217 26 : std::vector<CPLString> oListGrpName;
7218 31 : if (eFormat == NCDF_FORMAT_NC4 &&
7219 18 : nc_inq_grps(cdfid, &nGroupCount, nullptr) == NC_NOERR &&
7220 5 : nGroupCount > 0)
7221 : {
7222 : int *panGroupIds =
7223 2 : static_cast<int *>(CPLMalloc(sizeof(int) * nGroupCount));
7224 2 : status = nc_inq_grps(cdfid, nullptr, panGroupIds);
7225 2 : NCDF_ERR(status);
7226 5 : for (int i = 0; i < nGroupCount; i++)
7227 : {
7228 : char szGroupName[NC_MAX_NAME + 1];
7229 3 : szGroupName[0] = 0;
7230 3 : NCDF_ERR(nc_inq_grpname(panGroupIds[i], szGroupName));
7231 3 : int nNewGrpId = -1;
7232 3 : status = nc_def_grp(new_cdfid, szGroupName, &nNewGrpId);
7233 3 : NCDF_ERR(status);
7234 3 : if (status != NC_NOERR)
7235 : {
7236 0 : CPLFree(panGroupIds);
7237 0 : GDAL_nc_close(new_cdfid);
7238 0 : return false;
7239 : }
7240 3 : if (!CloneGrp(panGroupIds[i], nNewGrpId, /*bIsNC4=*/true, nLayerId,
7241 : nDimIdToGrow, nNewSize))
7242 : {
7243 0 : CPLFree(panGroupIds);
7244 0 : GDAL_nc_close(new_cdfid);
7245 0 : return false;
7246 : }
7247 : }
7248 2 : CPLFree(panGroupIds);
7249 :
7250 5 : for (int i = 0; i < this->GetLayerCount(); i++)
7251 : {
7252 3 : auto poLayer = dynamic_cast<netCDFLayer *>(papoLayers[i].get());
7253 3 : if (poLayer)
7254 : {
7255 : char szGroupName[NC_MAX_NAME + 1];
7256 3 : szGroupName[0] = 0;
7257 3 : status = nc_inq_grpname(poLayer->GetCDFID(), szGroupName);
7258 3 : NCDF_ERR(status);
7259 3 : oListGrpName.push_back(szGroupName);
7260 : }
7261 : }
7262 : }
7263 :
7264 13 : GDAL_nc_close(cdfid);
7265 13 : cdfid = -1;
7266 13 : GDAL_nc_close(new_cdfid);
7267 :
7268 26 : CPLString osOriFilename(osFilename + ".ori");
7269 26 : if (VSIRename(osFilename, osOriFilename) != 0 ||
7270 13 : VSIRename(osTmpFilename, osFilename) != 0)
7271 : {
7272 0 : CPLError(CE_Failure, CPLE_FileIO, "Renaming of files failed");
7273 0 : return false;
7274 : }
7275 13 : VSIUnlink(osOriFilename);
7276 :
7277 26 : CPLString osFilenameForNCOpen(osFilename);
7278 : #if defined(_WIN32) && !defined(NETCDF_USES_UTF8)
7279 : if (CPLTestBool(CPLGetConfigOption("GDAL_FILENAME_IS_UTF8", "YES")))
7280 : {
7281 : char *pszTemp = CPLRecode(osFilenameForNCOpen, CPL_ENC_UTF8, "CP_ACP");
7282 : osFilenameForNCOpen = pszTemp;
7283 : CPLFree(pszTemp);
7284 : }
7285 : #endif
7286 13 : status = GDAL_nc_open(osFilenameForNCOpen, NC_WRITE, &cdfid);
7287 13 : NCDF_ERR(status);
7288 13 : if (status != NC_NOERR)
7289 0 : return false;
7290 13 : bDefineMode = false;
7291 :
7292 13 : if (!oListGrpName.empty())
7293 : {
7294 5 : for (int i = 0; i < this->GetLayerCount(); i++)
7295 : {
7296 3 : auto poLayer = dynamic_cast<netCDFLayer *>(papoLayers[i].get());
7297 3 : if (poLayer)
7298 : {
7299 3 : int nNewLayerCDFID = -1;
7300 3 : status = nc_inq_ncid(cdfid, oListGrpName[i].c_str(),
7301 : &nNewLayerCDFID);
7302 3 : NCDF_ERR(status);
7303 3 : poLayer->SetCDFID(nNewLayerCDFID);
7304 : }
7305 : }
7306 : }
7307 : else
7308 : {
7309 22 : for (int i = 0; i < this->GetLayerCount(); i++)
7310 : {
7311 11 : auto poLayer = dynamic_cast<netCDFLayer *>(papoLayers[i].get());
7312 11 : if (poLayer)
7313 11 : poLayer->SetCDFID(cdfid);
7314 : }
7315 : }
7316 :
7317 13 : return true;
7318 : }
7319 :
7320 : #ifdef ENABLE_NCDUMP
7321 :
7322 : /************************************************************************/
7323 : /* netCDFDatasetCreateTempFile() */
7324 : /************************************************************************/
7325 :
7326 : /* Create a netCDF file from a text dump (format of ncdump) */
7327 : /* Mostly to easy fuzzing of the driver, while still generating valid */
7328 : /* netCDF files. */
7329 : /* Note: not all data types are supported ! */
7330 4 : bool netCDFDatasetCreateTempFile(NetCDFFormatEnum eFormat,
7331 : const char *pszTmpFilename, VSILFILE *fpSrc)
7332 : {
7333 4 : CPL_IGNORE_RET_VAL(eFormat);
7334 4 : int nCreateMode = NC_CLOBBER;
7335 4 : if (eFormat == NCDF_FORMAT_NC4)
7336 1 : nCreateMode |= NC_NETCDF4;
7337 3 : else if (eFormat == NCDF_FORMAT_NC4C)
7338 0 : nCreateMode |= NC_NETCDF4 | NC_CLASSIC_MODEL;
7339 4 : int nCdfId = -1;
7340 4 : int status = nc_create(pszTmpFilename, nCreateMode, &nCdfId);
7341 4 : if (status != NC_NOERR)
7342 : {
7343 0 : return false;
7344 : }
7345 4 : VSIFSeekL(fpSrc, 0, SEEK_SET);
7346 : const char *pszLine;
7347 4 : constexpr int SECTION_NONE = 0;
7348 4 : constexpr int SECTION_DIMENSIONS = 1;
7349 4 : constexpr int SECTION_VARIABLES = 2;
7350 4 : constexpr int SECTION_DATA = 3;
7351 4 : int nActiveSection = SECTION_NONE;
7352 8 : std::map<CPLString, int> oMapDimToId;
7353 8 : std::map<int, int> oMapDimIdToDimLen;
7354 8 : std::map<CPLString, int> oMapVarToId;
7355 8 : std::map<int, std::vector<int>> oMapVarIdToVectorOfDimId;
7356 8 : std::map<int, int> oMapVarIdToType;
7357 4 : std::set<CPLString> oSetAttrDefined;
7358 4 : oMapVarToId[""] = -1;
7359 4 : size_t nTotalVarSize = 0;
7360 208 : while ((pszLine = CPLReadLineL(fpSrc)) != nullptr)
7361 : {
7362 204 : if (STARTS_WITH(pszLine, "dimensions:") &&
7363 : nActiveSection == SECTION_NONE)
7364 : {
7365 4 : nActiveSection = SECTION_DIMENSIONS;
7366 : }
7367 200 : else if (STARTS_WITH(pszLine, "variables:") &&
7368 : nActiveSection == SECTION_DIMENSIONS)
7369 : {
7370 4 : nActiveSection = SECTION_VARIABLES;
7371 : }
7372 196 : else if (STARTS_WITH(pszLine, "data:") &&
7373 : nActiveSection == SECTION_VARIABLES)
7374 : {
7375 4 : nActiveSection = SECTION_DATA;
7376 4 : status = nc_enddef(nCdfId);
7377 4 : if (status != NC_NOERR)
7378 : {
7379 0 : CPLDebug("netCDF", "nc_enddef() failed: %s",
7380 : nc_strerror(status));
7381 : }
7382 : }
7383 192 : else if (nActiveSection == SECTION_DIMENSIONS)
7384 : {
7385 9 : char **papszTokens = CSLTokenizeString2(pszLine, " \t=;", 0);
7386 9 : if (CSLCount(papszTokens) == 2)
7387 : {
7388 9 : const char *pszDimName = papszTokens[0];
7389 9 : bool bValidName = true;
7390 9 : if (STARTS_WITH(pszDimName, "_nc4_non_coord_"))
7391 : {
7392 : // This is an internal netcdf prefix. Using it may
7393 : // cause memory leaks.
7394 0 : bValidName = false;
7395 : }
7396 9 : if (!bValidName)
7397 : {
7398 0 : CPLDebug("netCDF",
7399 : "nc_def_dim(%s) failed: invalid name found",
7400 : pszDimName);
7401 0 : CSLDestroy(papszTokens);
7402 0 : continue;
7403 : }
7404 :
7405 : const bool bIsASCII =
7406 9 : CPLIsASCII(pszDimName, static_cast<size_t>(-1));
7407 9 : if (!bIsASCII)
7408 : {
7409 : // Workaround https://github.com/Unidata/netcdf-c/pull/450
7410 0 : CPLDebug("netCDF",
7411 : "nc_def_dim(%s) failed: rejected because "
7412 : "of non-ASCII characters",
7413 : pszDimName);
7414 0 : CSLDestroy(papszTokens);
7415 0 : continue;
7416 : }
7417 9 : int nDimSize = EQUAL(papszTokens[1], "UNLIMITED")
7418 : ? NC_UNLIMITED
7419 9 : : atoi(papszTokens[1]);
7420 9 : if (nDimSize >= 1000)
7421 1 : nDimSize = 1000; // to avoid very long processing
7422 9 : if (nDimSize >= 0)
7423 : {
7424 9 : int nDimId = -1;
7425 9 : status = nc_def_dim(nCdfId, pszDimName, nDimSize, &nDimId);
7426 9 : if (status != NC_NOERR)
7427 : {
7428 0 : CPLDebug("netCDF", "nc_def_dim(%s, %d) failed: %s",
7429 : pszDimName, nDimSize, nc_strerror(status));
7430 : }
7431 : else
7432 : {
7433 : #ifdef DEBUG_VERBOSE
7434 : CPLDebug("netCDF", "nc_def_dim(%s, %d) (%s) succeeded",
7435 : pszDimName, nDimSize, pszLine);
7436 : #endif
7437 9 : oMapDimToId[pszDimName] = nDimId;
7438 9 : oMapDimIdToDimLen[nDimId] = nDimSize;
7439 : }
7440 : }
7441 : }
7442 9 : CSLDestroy(papszTokens);
7443 : }
7444 183 : else if (nActiveSection == SECTION_VARIABLES)
7445 : {
7446 390 : while (*pszLine == ' ' || *pszLine == '\t')
7447 249 : pszLine++;
7448 141 : const char *pszColumn = strchr(pszLine, ':');
7449 141 : const char *pszEqual = strchr(pszLine, '=');
7450 141 : if (pszColumn == nullptr)
7451 : {
7452 21 : char **papszTokens = CSLTokenizeString2(pszLine, " \t=(),;", 0);
7453 21 : if (CSLCount(papszTokens) >= 2)
7454 : {
7455 17 : const char *pszVarName = papszTokens[1];
7456 17 : bool bValidName = true;
7457 17 : if (STARTS_WITH(pszVarName, "_nc4_non_coord_"))
7458 : {
7459 : // This is an internal netcdf prefix. Using it may
7460 : // cause memory leaks.
7461 0 : bValidName = false;
7462 : }
7463 138 : for (int i = 0; pszVarName[i]; i++)
7464 : {
7465 121 : if (!((pszVarName[i] >= 'a' && pszVarName[i] <= 'z') ||
7466 28 : (pszVarName[i] >= 'A' && pszVarName[i] <= 'Z') ||
7467 9 : (pszVarName[i] >= '0' && pszVarName[i] <= '9') ||
7468 6 : pszVarName[i] == '_'))
7469 : {
7470 0 : bValidName = false;
7471 : }
7472 : }
7473 17 : if (!bValidName)
7474 : {
7475 0 : CPLDebug(
7476 : "netCDF",
7477 : "nc_def_var(%s) failed: illegal character found",
7478 : pszVarName);
7479 0 : CSLDestroy(papszTokens);
7480 0 : continue;
7481 : }
7482 17 : if (oMapVarToId.find(pszVarName) != oMapVarToId.end())
7483 : {
7484 0 : CPLDebug("netCDF",
7485 : "nc_def_var(%s) failed: already defined",
7486 : pszVarName);
7487 0 : CSLDestroy(papszTokens);
7488 0 : continue;
7489 : }
7490 17 : const char *pszVarType = papszTokens[0];
7491 17 : int nc_datatype = NC_BYTE;
7492 17 : size_t nDataTypeSize = 1;
7493 17 : if (EQUAL(pszVarType, "char"))
7494 : {
7495 6 : nc_datatype = NC_CHAR;
7496 6 : nDataTypeSize = 1;
7497 : }
7498 11 : else if (EQUAL(pszVarType, "byte"))
7499 : {
7500 3 : nc_datatype = NC_BYTE;
7501 3 : nDataTypeSize = 1;
7502 : }
7503 8 : else if (EQUAL(pszVarType, "short"))
7504 : {
7505 0 : nc_datatype = NC_SHORT;
7506 0 : nDataTypeSize = 2;
7507 : }
7508 8 : else if (EQUAL(pszVarType, "int"))
7509 : {
7510 0 : nc_datatype = NC_INT;
7511 0 : nDataTypeSize = 4;
7512 : }
7513 8 : else if (EQUAL(pszVarType, "float"))
7514 : {
7515 0 : nc_datatype = NC_FLOAT;
7516 0 : nDataTypeSize = 4;
7517 : }
7518 8 : else if (EQUAL(pszVarType, "double"))
7519 : {
7520 8 : nc_datatype = NC_DOUBLE;
7521 8 : nDataTypeSize = 8;
7522 : }
7523 0 : else if (EQUAL(pszVarType, "ubyte"))
7524 : {
7525 0 : nc_datatype = NC_UBYTE;
7526 0 : nDataTypeSize = 1;
7527 : }
7528 0 : else if (EQUAL(pszVarType, "ushort"))
7529 : {
7530 0 : nc_datatype = NC_USHORT;
7531 0 : nDataTypeSize = 2;
7532 : }
7533 0 : else if (EQUAL(pszVarType, "uint"))
7534 : {
7535 0 : nc_datatype = NC_UINT;
7536 0 : nDataTypeSize = 4;
7537 : }
7538 0 : else if (EQUAL(pszVarType, "int64"))
7539 : {
7540 0 : nc_datatype = NC_INT64;
7541 0 : nDataTypeSize = 8;
7542 : }
7543 0 : else if (EQUAL(pszVarType, "uint64"))
7544 : {
7545 0 : nc_datatype = NC_UINT64;
7546 0 : nDataTypeSize = 8;
7547 : }
7548 :
7549 17 : int nDims = CSLCount(papszTokens) - 2;
7550 17 : if (nDims >= 32)
7551 : {
7552 : // The number of dimensions in a netCDFv4 file is
7553 : // limited by #define H5S_MAX_RANK 32
7554 : // but libnetcdf doesn't check that...
7555 0 : CPLDebug("netCDF",
7556 : "nc_def_var(%s) failed: too many dimensions",
7557 : pszVarName);
7558 0 : CSLDestroy(papszTokens);
7559 0 : continue;
7560 : }
7561 17 : std::vector<int> aoDimIds;
7562 17 : bool bFailed = false;
7563 17 : size_t nSize = 1;
7564 35 : for (int i = 0; i < nDims; i++)
7565 : {
7566 18 : const char *pszDimName = papszTokens[2 + i];
7567 18 : if (oMapDimToId.find(pszDimName) == oMapDimToId.end())
7568 : {
7569 0 : bFailed = true;
7570 0 : break;
7571 : }
7572 18 : const int nDimId = oMapDimToId[pszDimName];
7573 18 : aoDimIds.push_back(nDimId);
7574 :
7575 18 : const size_t nDimSize = oMapDimIdToDimLen[nDimId];
7576 18 : if (nDimSize != 0)
7577 : {
7578 18 : if (nSize >
7579 18 : std::numeric_limits<size_t>::max() / nDimSize)
7580 : {
7581 0 : bFailed = true;
7582 0 : break;
7583 : }
7584 : else
7585 : {
7586 18 : nSize *= nDimSize;
7587 : }
7588 : }
7589 : }
7590 17 : if (bFailed)
7591 : {
7592 0 : CPLDebug("netCDF",
7593 : "nc_def_var(%s) failed: unknown dimension(s)",
7594 : pszVarName);
7595 0 : CSLDestroy(papszTokens);
7596 0 : continue;
7597 : }
7598 17 : if (nSize > 100U * 1024 * 1024 / nDataTypeSize)
7599 : {
7600 0 : CPLDebug("netCDF",
7601 : "nc_def_var(%s) failed: too large data",
7602 : pszVarName);
7603 0 : CSLDestroy(papszTokens);
7604 0 : continue;
7605 : }
7606 17 : if (nTotalVarSize >
7607 34 : std::numeric_limits<size_t>::max() - nSize ||
7608 17 : nTotalVarSize + nSize > 100 * 1024 * 1024)
7609 : {
7610 0 : CPLDebug("netCDF",
7611 : "nc_def_var(%s) failed: too large data",
7612 : pszVarName);
7613 0 : CSLDestroy(papszTokens);
7614 0 : continue;
7615 : }
7616 17 : nTotalVarSize += nSize;
7617 :
7618 17 : int nVarId = -1;
7619 : status =
7620 30 : nc_def_var(nCdfId, pszVarName, nc_datatype, nDims,
7621 13 : (nDims) ? &aoDimIds[0] : nullptr, &nVarId);
7622 17 : if (status != NC_NOERR)
7623 : {
7624 0 : CPLDebug("netCDF", "nc_def_var(%s) failed: %s",
7625 : pszVarName, nc_strerror(status));
7626 : }
7627 : else
7628 : {
7629 : #ifdef DEBUG_VERBOSE
7630 : CPLDebug("netCDF", "nc_def_var(%s) (%s) succeeded",
7631 : pszVarName, pszLine);
7632 : #endif
7633 17 : oMapVarToId[pszVarName] = nVarId;
7634 17 : oMapVarIdToType[nVarId] = nc_datatype;
7635 17 : oMapVarIdToVectorOfDimId[nVarId] = std::move(aoDimIds);
7636 : }
7637 : }
7638 21 : CSLDestroy(papszTokens);
7639 : }
7640 120 : else if (pszEqual != nullptr && pszEqual - pszColumn > 0)
7641 : {
7642 116 : CPLString osVarName(pszLine, pszColumn - pszLine);
7643 116 : CPLString osAttrName(pszColumn + 1, pszEqual - pszColumn - 1);
7644 116 : osAttrName.Trim();
7645 116 : if (oMapVarToId.find(osVarName) == oMapVarToId.end())
7646 : {
7647 0 : CPLDebug("netCDF",
7648 : "nc_put_att(%s:%s) failed: "
7649 : "no corresponding variable",
7650 : osVarName.c_str(), osAttrName.c_str());
7651 0 : continue;
7652 : }
7653 116 : bool bValidName = true;
7654 1743 : for (size_t i = 0; i < osAttrName.size(); i++)
7655 : {
7656 1865 : if (!((osAttrName[i] >= 'a' && osAttrName[i] <= 'z') ||
7657 238 : (osAttrName[i] >= 'A' && osAttrName[i] <= 'Z') ||
7658 158 : (osAttrName[i] >= '0' && osAttrName[i] <= '9') ||
7659 158 : osAttrName[i] == '_'))
7660 : {
7661 0 : bValidName = false;
7662 : }
7663 : }
7664 116 : if (!bValidName)
7665 : {
7666 0 : CPLDebug(
7667 : "netCDF",
7668 : "nc_put_att(%s:%s) failed: illegal character found",
7669 : osVarName.c_str(), osAttrName.c_str());
7670 0 : continue;
7671 : }
7672 116 : if (oSetAttrDefined.find(osVarName + ":" + osAttrName) !=
7673 232 : oSetAttrDefined.end())
7674 : {
7675 0 : CPLDebug("netCDF",
7676 : "nc_put_att(%s:%s) failed: already defined",
7677 : osVarName.c_str(), osAttrName.c_str());
7678 0 : continue;
7679 : }
7680 :
7681 116 : const int nVarId = oMapVarToId[osVarName];
7682 116 : const char *pszValue = pszEqual + 1;
7683 232 : while (*pszValue == ' ')
7684 116 : pszValue++;
7685 :
7686 116 : status = NC_EBADTYPE;
7687 116 : if (*pszValue == '"')
7688 : {
7689 : // For _FillValue, the attribute type should match
7690 : // the variable type. Leaks memory with NC4 otherwise
7691 74 : if (osAttrName == "_FillValue")
7692 : {
7693 0 : CPLDebug("netCDF", "nc_put_att_(%s:%s) failed: %s",
7694 : osVarName.c_str(), osAttrName.c_str(),
7695 : nc_strerror(status));
7696 0 : continue;
7697 : }
7698 :
7699 : // Unquote and unescape string value
7700 74 : CPLString osVal(pszValue + 1);
7701 222 : while (!osVal.empty())
7702 : {
7703 222 : if (osVal.back() == ';' || osVal.back() == ' ')
7704 : {
7705 148 : osVal.pop_back();
7706 : }
7707 74 : else if (osVal.back() == '"')
7708 : {
7709 74 : osVal.pop_back();
7710 74 : break;
7711 : }
7712 : else
7713 : {
7714 0 : break;
7715 : }
7716 : }
7717 74 : osVal.replaceAll("\\\"", '"');
7718 74 : status = nc_put_att_text(nCdfId, nVarId, osAttrName,
7719 : osVal.size(), osVal.c_str());
7720 : }
7721 : else
7722 : {
7723 84 : CPLString osVal(pszValue);
7724 126 : while (!osVal.empty())
7725 : {
7726 126 : if (osVal.back() == ';' || osVal.back() == ' ')
7727 : {
7728 84 : osVal.pop_back();
7729 : }
7730 : else
7731 : {
7732 42 : break;
7733 : }
7734 : }
7735 42 : int nc_datatype = -1;
7736 42 : if (!osVal.empty() && osVal.back() == 'b')
7737 : {
7738 3 : nc_datatype = NC_BYTE;
7739 3 : osVal.pop_back();
7740 : }
7741 39 : else if (!osVal.empty() && osVal.back() == 's')
7742 : {
7743 3 : nc_datatype = NC_SHORT;
7744 3 : osVal.pop_back();
7745 : }
7746 42 : if (CPLGetValueType(osVal) == CPL_VALUE_INTEGER)
7747 : {
7748 7 : if (nc_datatype < 0)
7749 4 : nc_datatype = NC_INT;
7750 : }
7751 35 : else if (CPLGetValueType(osVal) == CPL_VALUE_REAL)
7752 : {
7753 32 : nc_datatype = NC_DOUBLE;
7754 : }
7755 : else
7756 : {
7757 3 : nc_datatype = -1;
7758 : }
7759 :
7760 : // For _FillValue, check that the attribute type matches
7761 : // the variable type. Leaks memory with NC4 otherwise
7762 42 : if (osAttrName == "_FillValue")
7763 : {
7764 6 : if (nVarId < 0 ||
7765 3 : nc_datatype != oMapVarIdToType[nVarId])
7766 : {
7767 0 : nc_datatype = -1;
7768 : }
7769 : }
7770 :
7771 42 : if (nc_datatype == NC_BYTE)
7772 : {
7773 : signed char chVal =
7774 3 : static_cast<signed char>(atoi(osVal));
7775 3 : status = nc_put_att_schar(nCdfId, nVarId, osAttrName,
7776 : NC_BYTE, 1, &chVal);
7777 : }
7778 39 : else if (nc_datatype == NC_SHORT)
7779 : {
7780 0 : short nVal = static_cast<short>(atoi(osVal));
7781 0 : status = nc_put_att_short(nCdfId, nVarId, osAttrName,
7782 : NC_SHORT, 1, &nVal);
7783 : }
7784 39 : else if (nc_datatype == NC_INT)
7785 : {
7786 4 : int nVal = static_cast<int>(atoi(osVal));
7787 4 : status = nc_put_att_int(nCdfId, nVarId, osAttrName,
7788 : NC_INT, 1, &nVal);
7789 : }
7790 35 : else if (nc_datatype == NC_DOUBLE)
7791 : {
7792 32 : double dfVal = CPLAtof(osVal);
7793 32 : status = nc_put_att_double(nCdfId, nVarId, osAttrName,
7794 : NC_DOUBLE, 1, &dfVal);
7795 : }
7796 : }
7797 116 : if (status != NC_NOERR)
7798 : {
7799 3 : CPLDebug("netCDF", "nc_put_att_(%s:%s) failed: %s",
7800 : osVarName.c_str(), osAttrName.c_str(),
7801 : nc_strerror(status));
7802 : }
7803 : else
7804 : {
7805 113 : oSetAttrDefined.insert(osVarName + ":" + osAttrName);
7806 : #ifdef DEBUG_VERBOSE
7807 : CPLDebug("netCDF", "nc_put_att_(%s:%s) (%s) succeeded",
7808 : osVarName.c_str(), osAttrName.c_str(), pszLine);
7809 : #endif
7810 : }
7811 : }
7812 : }
7813 42 : else if (nActiveSection == SECTION_DATA)
7814 : {
7815 55 : while (*pszLine == ' ' || *pszLine == '\t')
7816 17 : pszLine++;
7817 38 : const char *pszEqual = strchr(pszLine, '=');
7818 38 : if (pszEqual)
7819 : {
7820 17 : CPLString osVarName(pszLine, pszEqual - pszLine);
7821 17 : osVarName.Trim();
7822 17 : if (oMapVarToId.find(osVarName) == oMapVarToId.end())
7823 0 : continue;
7824 17 : const int nVarId = oMapVarToId[osVarName];
7825 17 : CPLString osAccVal(pszEqual + 1);
7826 17 : osAccVal.Trim();
7827 153 : while (osAccVal.empty() || osAccVal.back() != ';')
7828 : {
7829 136 : pszLine = CPLReadLineL(fpSrc);
7830 136 : if (pszLine == nullptr)
7831 0 : break;
7832 272 : CPLString osVal(pszLine);
7833 136 : osVal.Trim();
7834 136 : osAccVal += osVal;
7835 : }
7836 17 : if (pszLine == nullptr)
7837 0 : break;
7838 17 : osAccVal.pop_back();
7839 :
7840 : const std::vector<int> aoDimIds =
7841 34 : oMapVarIdToVectorOfDimId[nVarId];
7842 17 : size_t nSize = 1;
7843 34 : std::vector<size_t> aoStart, aoEdge;
7844 17 : aoStart.resize(aoDimIds.size());
7845 17 : aoEdge.resize(aoDimIds.size());
7846 35 : for (size_t i = 0; i < aoDimIds.size(); ++i)
7847 : {
7848 18 : const size_t nDimSize = oMapDimIdToDimLen[aoDimIds[i]];
7849 36 : if (nDimSize != 0 &&
7850 18 : nSize > std::numeric_limits<size_t>::max() / nDimSize)
7851 : {
7852 0 : nSize = 0;
7853 : }
7854 : else
7855 : {
7856 18 : nSize *= nDimSize;
7857 : }
7858 18 : aoStart[i] = 0;
7859 18 : aoEdge[i] = nDimSize;
7860 : }
7861 :
7862 17 : status = NC_EBADTYPE;
7863 17 : if (nSize == 0)
7864 : {
7865 : // Might happen with a unlimited dimension
7866 : }
7867 17 : else if (oMapVarIdToType[nVarId] == NC_DOUBLE)
7868 : {
7869 8 : if (!aoStart.empty())
7870 : {
7871 : char **papszTokens =
7872 8 : CSLTokenizeString2(osAccVal, " ,;", 0);
7873 8 : size_t nTokens = CSLCount(papszTokens);
7874 8 : if (nTokens >= nSize)
7875 : {
7876 : double *padfVals = static_cast<double *>(
7877 8 : VSI_CALLOC_VERBOSE(nSize, sizeof(double)));
7878 8 : if (padfVals)
7879 : {
7880 132 : for (size_t i = 0; i < nSize; i++)
7881 : {
7882 124 : padfVals[i] = CPLAtof(papszTokens[i]);
7883 : }
7884 8 : status = nc_put_vara_double(
7885 8 : nCdfId, nVarId, &aoStart[0], &aoEdge[0],
7886 : padfVals);
7887 8 : VSIFree(padfVals);
7888 : }
7889 : }
7890 8 : CSLDestroy(papszTokens);
7891 : }
7892 : }
7893 9 : else if (oMapVarIdToType[nVarId] == NC_BYTE)
7894 : {
7895 3 : if (!aoStart.empty())
7896 : {
7897 : char **papszTokens =
7898 3 : CSLTokenizeString2(osAccVal, " ,;", 0);
7899 3 : size_t nTokens = CSLCount(papszTokens);
7900 3 : if (nTokens >= nSize)
7901 : {
7902 : signed char *panVals = static_cast<signed char *>(
7903 3 : VSI_CALLOC_VERBOSE(nSize, sizeof(signed char)));
7904 3 : if (panVals)
7905 : {
7906 1203 : for (size_t i = 0; i < nSize; i++)
7907 : {
7908 1200 : panVals[i] = static_cast<signed char>(
7909 1200 : atoi(papszTokens[i]));
7910 : }
7911 3 : status = nc_put_vara_schar(nCdfId, nVarId,
7912 3 : &aoStart[0],
7913 3 : &aoEdge[0], panVals);
7914 3 : VSIFree(panVals);
7915 : }
7916 : }
7917 3 : CSLDestroy(papszTokens);
7918 : }
7919 : }
7920 6 : else if (oMapVarIdToType[nVarId] == NC_CHAR)
7921 : {
7922 6 : if (aoStart.size() == 2)
7923 : {
7924 4 : std::vector<CPLString> aoStrings;
7925 2 : bool bInString = false;
7926 4 : CPLString osCurString;
7927 935 : for (size_t i = 0; i < osAccVal.size();)
7928 : {
7929 933 : if (!bInString)
7930 : {
7931 8 : if (osAccVal[i] == '"')
7932 : {
7933 4 : bInString = true;
7934 4 : osCurString.clear();
7935 : }
7936 8 : i++;
7937 : }
7938 926 : else if (osAccVal[i] == '\\' &&
7939 926 : i + 1 < osAccVal.size() &&
7940 1 : osAccVal[i + 1] == '"')
7941 : {
7942 1 : osCurString += '"';
7943 1 : i += 2;
7944 : }
7945 924 : else if (osAccVal[i] == '"')
7946 : {
7947 4 : aoStrings.push_back(osCurString);
7948 4 : osCurString.clear();
7949 4 : bInString = false;
7950 4 : i++;
7951 : }
7952 : else
7953 : {
7954 920 : osCurString += osAccVal[i];
7955 920 : i++;
7956 : }
7957 : }
7958 2 : const size_t nRecords = oMapDimIdToDimLen[aoDimIds[0]];
7959 2 : const size_t nWidth = oMapDimIdToDimLen[aoDimIds[1]];
7960 2 : size_t nIters = aoStrings.size();
7961 2 : if (nIters > nRecords)
7962 0 : nIters = nRecords;
7963 6 : for (size_t i = 0; i < nIters; i++)
7964 : {
7965 : size_t anIndex[2];
7966 4 : anIndex[0] = i;
7967 4 : anIndex[1] = 0;
7968 : size_t anCount[2];
7969 4 : anCount[0] = 1;
7970 4 : anCount[1] = aoStrings[i].size();
7971 4 : if (anCount[1] > nWidth)
7972 0 : anCount[1] = nWidth;
7973 : status =
7974 4 : nc_put_vara_text(nCdfId, nVarId, anIndex,
7975 4 : anCount, aoStrings[i].c_str());
7976 4 : if (status != NC_NOERR)
7977 0 : break;
7978 : }
7979 : }
7980 : }
7981 17 : if (status != NC_NOERR)
7982 : {
7983 4 : CPLDebug("netCDF", "nc_put_var_(%s) failed: %s",
7984 : osVarName.c_str(), nc_strerror(status));
7985 : }
7986 : }
7987 : }
7988 : }
7989 :
7990 4 : GDAL_nc_close(nCdfId);
7991 4 : return true;
7992 : }
7993 :
7994 : #endif // ENABLE_NCDUMP
7995 :
7996 : /************************************************************************/
7997 : /* Open() */
7998 : /************************************************************************/
7999 :
8000 678 : GDALDataset *netCDFDataset::Open(GDALOpenInfo *poOpenInfo)
8001 :
8002 : {
8003 : #ifdef NCDF_DEBUG
8004 : CPLDebug("GDAL_netCDF", "\n=====\nOpen(), filename=[%s]",
8005 : poOpenInfo->pszFilename);
8006 : #endif
8007 :
8008 : // Does this appear to be a netcdf file?
8009 678 : NetCDFFormatEnum eTmpFormat = NCDF_FORMAT_NONE;
8010 678 : if (!STARTS_WITH_CI(poOpenInfo->pszFilename, "NETCDF:"))
8011 : {
8012 618 : eTmpFormat = netCDFIdentifyFormat(poOpenInfo, /* bCheckExt = */ true);
8013 : #ifdef NCDF_DEBUG
8014 : CPLDebug("GDAL_netCDF", "identified format %d", eTmpFormat);
8015 : #endif
8016 : // Note: not calling Identify() directly, because we want the file type.
8017 : // Only support NCDF_FORMAT* formats.
8018 618 : if (NCDF_FORMAT_NC == eTmpFormat || NCDF_FORMAT_NC2 == eTmpFormat ||
8019 2 : NCDF_FORMAT_NC4 == eTmpFormat || NCDF_FORMAT_NC4C == eTmpFormat)
8020 : {
8021 : // ok
8022 : }
8023 2 : else if (eTmpFormat == NCDF_FORMAT_HDF4 &&
8024 0 : poOpenInfo->IsSingleAllowedDriver("netCDF"))
8025 : {
8026 : // ok
8027 : }
8028 : else
8029 : {
8030 2 : return nullptr;
8031 : }
8032 : }
8033 : else
8034 : {
8035 : #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
8036 : // We don't necessarily want to catch bugs in libnetcdf ...
8037 : if (CPLGetConfigOption("DISABLE_OPEN_REAL_NETCDF_FILES", nullptr))
8038 : {
8039 : return nullptr;
8040 : }
8041 : #endif
8042 : }
8043 :
8044 676 : if (poOpenInfo->nOpenFlags & GDAL_OF_MULTIDIM_RASTER)
8045 : {
8046 183 : return OpenMultiDim(poOpenInfo);
8047 : }
8048 :
8049 986 : CPLMutexHolderD(&hNCMutex);
8050 :
8051 493 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll deadlock with
8052 : // GDALDataset own mutex.
8053 493 : netCDFDataset *poDS = new netCDFDataset();
8054 493 : poDS->papszOpenOptions = CSLDuplicate(poOpenInfo->papszOpenOptions);
8055 493 : CPLAcquireMutex(hNCMutex, 1000.0);
8056 :
8057 493 : poDS->SetDescription(poOpenInfo->pszFilename);
8058 :
8059 : // Check if filename start with NETCDF: tag.
8060 493 : bool bTreatAsSubdataset = false;
8061 986 : CPLString osSubdatasetName;
8062 :
8063 : #ifdef ENABLE_NCDUMP
8064 493 : const char *pszHeader =
8065 : reinterpret_cast<const char *>(poOpenInfo->pabyHeader);
8066 493 : if (poOpenInfo->fpL != nullptr && STARTS_WITH(pszHeader, "netcdf ") &&
8067 3 : strstr(pszHeader, "dimensions:") && strstr(pszHeader, "variables:"))
8068 : {
8069 : // By default create a temporary file that will be destroyed,
8070 : // unless NETCDF_TMP_FILE is defined. Can be useful to see which
8071 : // netCDF file has been generated from a potential fuzzed input.
8072 3 : poDS->osFilename = CPLGetConfigOption("NETCDF_TMP_FILE", "");
8073 3 : if (poDS->osFilename.empty())
8074 : {
8075 3 : poDS->bFileToDestroyAtClosing = true;
8076 3 : poDS->osFilename = CPLGenerateTempFilenameSafe("netcdf_tmp");
8077 : }
8078 3 : if (!netCDFDatasetCreateTempFile(eTmpFormat, poDS->osFilename,
8079 : poOpenInfo->fpL))
8080 : {
8081 0 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll
8082 : // deadlock with GDALDataset own mutex.
8083 0 : delete poDS;
8084 0 : CPLAcquireMutex(hNCMutex, 1000.0);
8085 0 : return nullptr;
8086 : }
8087 3 : bTreatAsSubdataset = false;
8088 3 : poDS->eFormat = eTmpFormat;
8089 : }
8090 : else
8091 : #endif
8092 :
8093 490 : if (STARTS_WITH_CI(poOpenInfo->pszFilename, "NETCDF:"))
8094 : {
8095 : char **papszName =
8096 60 : CSLTokenizeString2(poOpenInfo->pszFilename, ":",
8097 : CSLT_HONOURSTRINGS | CSLT_PRESERVEESCAPES);
8098 :
8099 120 : if (CSLCount(papszName) >= 3 &&
8100 60 : ((strlen(papszName[1]) == 1 && /* D:\\bla */
8101 0 : (papszName[2][0] == '/' || papszName[2][0] == '\\')) ||
8102 60 : EQUAL(papszName[1], "http") || EQUAL(papszName[1], "https") ||
8103 60 : EQUAL(papszName[1], "/vsicurl/http") ||
8104 60 : EQUAL(papszName[1], "/vsicurl/https") ||
8105 60 : EQUAL(papszName[1], "/vsicurl_streaming/http") ||
8106 60 : EQUAL(papszName[1], "/vsicurl_streaming/https")))
8107 : {
8108 0 : const int nCountBefore = CSLCount(papszName);
8109 0 : CPLString osTmp = papszName[1];
8110 0 : osTmp += ':';
8111 0 : osTmp += papszName[2];
8112 0 : CPLFree(papszName[1]);
8113 0 : CPLFree(papszName[2]);
8114 0 : papszName[1] = CPLStrdup(osTmp);
8115 0 : memmove(papszName + 2, papszName + 3,
8116 0 : (nCountBefore - 2) * sizeof(char *));
8117 : }
8118 :
8119 60 : if (CSLCount(papszName) == 3)
8120 : {
8121 60 : poDS->osFilename = papszName[1];
8122 60 : osSubdatasetName = papszName[2];
8123 60 : bTreatAsSubdataset = true;
8124 60 : CSLDestroy(papszName);
8125 : }
8126 0 : else if (CSLCount(papszName) == 2)
8127 : {
8128 0 : poDS->osFilename = papszName[1];
8129 0 : osSubdatasetName = "";
8130 0 : bTreatAsSubdataset = false;
8131 0 : CSLDestroy(papszName);
8132 : }
8133 : else
8134 : {
8135 0 : CSLDestroy(papszName);
8136 0 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll
8137 : // deadlock with GDALDataset own mutex.
8138 0 : delete poDS;
8139 0 : CPLAcquireMutex(hNCMutex, 1000.0);
8140 0 : CPLError(CE_Failure, CPLE_AppDefined,
8141 : "Failed to parse NETCDF: prefix string into expected 2, 3 "
8142 : "or 4 fields.");
8143 0 : return nullptr;
8144 : }
8145 :
8146 120 : if (!STARTS_WITH(poDS->osFilename, "http://") &&
8147 60 : !STARTS_WITH(poDS->osFilename, "https://"))
8148 : {
8149 : // Identify Format from real file, with bCheckExt=FALSE.
8150 : GDALOpenInfo *poOpenInfo2 =
8151 60 : new GDALOpenInfo(poDS->osFilename.c_str(), GA_ReadOnly);
8152 60 : poDS->eFormat =
8153 60 : netCDFIdentifyFormat(poOpenInfo2, /* bCheckExt = */ false);
8154 60 : delete poOpenInfo2;
8155 60 : if (NCDF_FORMAT_NONE == poDS->eFormat ||
8156 60 : NCDF_FORMAT_UNKNOWN == poDS->eFormat)
8157 : {
8158 0 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll
8159 : // deadlock with GDALDataset own mutex.
8160 0 : delete poDS;
8161 0 : CPLAcquireMutex(hNCMutex, 1000.0);
8162 0 : return nullptr;
8163 : }
8164 : }
8165 : }
8166 : else
8167 : {
8168 430 : poDS->osFilename = poOpenInfo->pszFilename;
8169 430 : bTreatAsSubdataset = false;
8170 430 : poDS->eFormat = eTmpFormat;
8171 : }
8172 :
8173 : // Try opening the dataset.
8174 : #if defined(NCDF_DEBUG) && defined(ENABLE_UFFD)
8175 : CPLDebug("GDAL_netCDF", "calling nc_open_mem(%s)",
8176 : poDS->osFilename.c_str());
8177 : #elif defined(NCDF_DEBUG) && !defined(ENABLE_UFFD)
8178 : CPLDebug("GDAL_netCDF", "calling nc_open(%s)", poDS->osFilename.c_str());
8179 : #endif
8180 493 : int cdfid = -1;
8181 493 : const int nMode = ((poOpenInfo->nOpenFlags & GDAL_OF_UPDATE) != 0)
8182 : ? NC_WRITE
8183 : : NC_NOWRITE;
8184 986 : CPLString osFilenameForNCOpen(poDS->osFilename);
8185 : #if defined(_WIN32) && !defined(NETCDF_USES_UTF8)
8186 : if (CPLTestBool(CPLGetConfigOption("GDAL_FILENAME_IS_UTF8", "YES")))
8187 : {
8188 : char *pszTemp = CPLRecode(osFilenameForNCOpen, CPL_ENC_UTF8, "CP_ACP");
8189 : osFilenameForNCOpen = pszTemp;
8190 : CPLFree(pszTemp);
8191 : }
8192 : #endif
8193 493 : int status2 = -1;
8194 :
8195 : #ifdef ENABLE_UFFD
8196 493 : cpl_uffd_context *pCtx = nullptr;
8197 : #endif
8198 :
8199 508 : if (STARTS_WITH(osFilenameForNCOpen, "/vsimem/") &&
8200 15 : poOpenInfo->eAccess == GA_ReadOnly)
8201 : {
8202 15 : vsi_l_offset nLength = 0;
8203 15 : poDS->fpVSIMEM = VSIFOpenL(osFilenameForNCOpen, "rb");
8204 15 : if (poDS->fpVSIMEM)
8205 : {
8206 : // We assume that the file will not be modified. If it is, then
8207 : // pabyBuffer might become invalid.
8208 : GByte *pabyBuffer =
8209 15 : VSIGetMemFileBuffer(osFilenameForNCOpen, &nLength, false);
8210 15 : if (pabyBuffer)
8211 : {
8212 15 : status2 = nc_open_mem(CPLGetFilename(osFilenameForNCOpen),
8213 : nMode, static_cast<size_t>(nLength),
8214 : pabyBuffer, &cdfid);
8215 : }
8216 : }
8217 : }
8218 : else
8219 : {
8220 : const bool bVsiFile =
8221 478 : !strncmp(osFilenameForNCOpen, "/vsi", strlen("/vsi"));
8222 : #ifdef ENABLE_UFFD
8223 478 : bool bReadOnly = (poOpenInfo->eAccess == GA_ReadOnly);
8224 478 : void *pVma = nullptr;
8225 478 : uint64_t nVmaSize = 0;
8226 :
8227 478 : if (bVsiFile)
8228 : {
8229 2 : if (bReadOnly)
8230 : {
8231 2 : if (CPLIsUserFaultMappingSupported())
8232 : {
8233 2 : pCtx = CPLCreateUserFaultMapping(osFilenameForNCOpen, &pVma,
8234 : &nVmaSize);
8235 : }
8236 : else
8237 : {
8238 0 : CPLError(CE_Failure, CPLE_AppDefined,
8239 : "Opening a /vsi file with the netCDF driver "
8240 : "requires Linux userfaultfd to be available. "
8241 : "If running from Docker, "
8242 : "--security-opt seccomp=unconfined might be "
8243 : "needed.%s",
8244 0 : ((poDS->eFormat == NCDF_FORMAT_NC4 ||
8245 0 : poDS->eFormat == NCDF_FORMAT_HDF5) &&
8246 0 : GDALGetDriverByName("HDF5"))
8247 : ? " Or you may set the GDAL_SKIP=netCDF "
8248 : "configuration option to force the use of "
8249 : "the HDF5 driver."
8250 : : "");
8251 : }
8252 : }
8253 : else
8254 : {
8255 0 : CPLError(CE_Failure, CPLE_AppDefined,
8256 : "Opening a /vsi file with the netCDF driver is only "
8257 : "supported in read-only mode");
8258 : }
8259 : }
8260 478 : if (pCtx != nullptr && pVma != nullptr && nVmaSize > 0)
8261 : {
8262 : // netCDF code, at least for netCDF 4.7.0, is confused by filenames
8263 : // like /vsicurl/http[s]://example.com/foo.nc, so just pass the
8264 : // final part
8265 2 : status2 = nc_open_mem(CPLGetFilename(osFilenameForNCOpen), nMode,
8266 : static_cast<size_t>(nVmaSize), pVma, &cdfid);
8267 : }
8268 : else
8269 476 : status2 = GDAL_nc_open(osFilenameForNCOpen, nMode, &cdfid);
8270 : #else
8271 : if (bVsiFile)
8272 : {
8273 : CPLError(
8274 : CE_Failure, CPLE_AppDefined,
8275 : "Opening a /vsi file with the netCDF driver requires Linux "
8276 : "userfaultfd to be available.%s",
8277 : ((poDS->eFormat == NCDF_FORMAT_NC4 ||
8278 : poDS->eFormat == NCDF_FORMAT_HDF5) &&
8279 : GDALGetDriverByName("HDF5"))
8280 : ? " Or you may set the GDAL_SKIP=netCDF "
8281 : "configuration option to force the use of the HDF5 "
8282 : "driver."
8283 : : "");
8284 : status2 = NC_EIO;
8285 : }
8286 : else
8287 : {
8288 : status2 = GDAL_nc_open(osFilenameForNCOpen, nMode, &cdfid);
8289 : }
8290 : #endif
8291 : }
8292 493 : if (status2 != NC_NOERR)
8293 : {
8294 : #ifdef NCDF_DEBUG
8295 : CPLDebug("GDAL_netCDF", "error opening");
8296 : #endif
8297 0 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll deadlock
8298 : // with GDALDataset own mutex.
8299 0 : delete poDS;
8300 0 : CPLAcquireMutex(hNCMutex, 1000.0);
8301 0 : return nullptr;
8302 : }
8303 : #ifdef NCDF_DEBUG
8304 : CPLDebug("GDAL_netCDF", "got cdfid=%d", cdfid);
8305 : #endif
8306 :
8307 : #if defined(ENABLE_NCDUMP) && !defined(_WIN32)
8308 : // Try to destroy the temporary file right now on Unix
8309 493 : if (poDS->bFileToDestroyAtClosing)
8310 : {
8311 3 : if (VSIUnlink(poDS->osFilename) == 0)
8312 : {
8313 3 : poDS->bFileToDestroyAtClosing = false;
8314 : }
8315 : }
8316 : #endif
8317 :
8318 : // Is this a real netCDF file?
8319 : int ndims;
8320 : int ngatts;
8321 : int nvars;
8322 : int unlimdimid;
8323 493 : int status = nc_inq(cdfid, &ndims, &nvars, &ngatts, &unlimdimid);
8324 493 : if (status != NC_NOERR)
8325 : {
8326 0 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll deadlock
8327 : // with GDALDataset own mutex.
8328 0 : delete poDS;
8329 0 : CPLAcquireMutex(hNCMutex, 1000.0);
8330 0 : return nullptr;
8331 : }
8332 :
8333 : // Get file type from netcdf.
8334 493 : int nTmpFormat = NCDF_FORMAT_NONE;
8335 493 : status = nc_inq_format(cdfid, &nTmpFormat);
8336 493 : if (status != NC_NOERR)
8337 : {
8338 0 : NCDF_ERR(status);
8339 : }
8340 : else
8341 : {
8342 493 : CPLDebug("GDAL_netCDF",
8343 : "driver detected file type=%d, libnetcdf detected type=%d",
8344 493 : poDS->eFormat, nTmpFormat);
8345 493 : if (static_cast<NetCDFFormatEnum>(nTmpFormat) != poDS->eFormat)
8346 : {
8347 : // Warn if file detection conflicts with that from libnetcdf
8348 : // except for NC4C, which we have no way of detecting initially.
8349 26 : if (nTmpFormat != NCDF_FORMAT_NC4C &&
8350 13 : !STARTS_WITH(poDS->osFilename, "http://") &&
8351 0 : !STARTS_WITH(poDS->osFilename, "https://"))
8352 : {
8353 0 : CPLError(CE_Warning, CPLE_AppDefined,
8354 : "NetCDF driver detected file type=%d, but libnetcdf "
8355 : "detected type=%d",
8356 0 : poDS->eFormat, nTmpFormat);
8357 : }
8358 13 : CPLDebug("GDAL_netCDF", "setting file type to %d, was %d",
8359 13 : nTmpFormat, poDS->eFormat);
8360 13 : poDS->eFormat = static_cast<NetCDFFormatEnum>(nTmpFormat);
8361 : }
8362 : }
8363 :
8364 : // Does the request variable exist?
8365 493 : if (bTreatAsSubdataset)
8366 : {
8367 : int dummy;
8368 60 : if (NCDFOpenSubDataset(cdfid, osSubdatasetName.c_str(), &dummy,
8369 60 : &dummy) != CE_None)
8370 : {
8371 0 : CPLError(CE_Warning, CPLE_AppDefined,
8372 : "%s is a netCDF file, but %s is not a variable.",
8373 : poOpenInfo->pszFilename, osSubdatasetName.c_str());
8374 :
8375 0 : GDAL_nc_close(cdfid);
8376 : #ifdef ENABLE_UFFD
8377 0 : NETCDF_UFFD_UNMAP(pCtx);
8378 : #endif
8379 0 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll
8380 : // deadlock with GDALDataset own mutex.
8381 0 : delete poDS;
8382 0 : CPLAcquireMutex(hNCMutex, 1000.0);
8383 0 : return nullptr;
8384 : }
8385 : }
8386 :
8387 : // Figure out whether or not the listed dataset has support for simple
8388 : // geometries (CF-1.8)
8389 493 : poDS->nCFVersion = nccfdriver::getCFVersion(cdfid);
8390 493 : bool bHasSimpleGeometries = false; // but not necessarily valid
8391 493 : if (poDS->nCFVersion >= 1.8)
8392 : {
8393 75 : bHasSimpleGeometries = poDS->DetectAndFillSGLayers(cdfid);
8394 75 : if (bHasSimpleGeometries)
8395 : {
8396 67 : poDS->bSGSupport = true;
8397 67 : poDS->vcdf.enableFullVirtualMode();
8398 : }
8399 : }
8400 :
8401 : char szConventions[NC_MAX_NAME + 1];
8402 493 : szConventions[0] = '\0';
8403 493 : nc_type nAttype = NC_NAT;
8404 493 : size_t nAttlen = 0;
8405 493 : nc_inq_att(cdfid, NC_GLOBAL, "Conventions", &nAttype, &nAttlen);
8406 986 : if (nAttlen >= sizeof(szConventions) ||
8407 493 : nc_get_att_text(cdfid, NC_GLOBAL, "Conventions", szConventions) !=
8408 : NC_NOERR)
8409 : {
8410 57 : CPLDebug("GDAL_netCDF", "No UNIDATA NC_GLOBAL:Conventions attribute");
8411 : // Note that 'Conventions' is always capital 'C' in CF spec.
8412 : }
8413 : else
8414 : {
8415 436 : szConventions[nAttlen] = '\0';
8416 : }
8417 :
8418 : // Create band information objects.
8419 493 : CPLDebug("GDAL_netCDF", "var_count = %d", nvars);
8420 :
8421 : // Create a corresponding GDALDataset.
8422 : // Create Netcdf Subdataset if filename as NETCDF tag.
8423 493 : poDS->cdfid = cdfid;
8424 : #ifdef ENABLE_UFFD
8425 493 : poDS->pCtx = pCtx;
8426 : #endif
8427 493 : poDS->eAccess = poOpenInfo->eAccess;
8428 493 : poDS->bDefineMode = false;
8429 :
8430 493 : poDS->ReadAttributes(cdfid, NC_GLOBAL);
8431 :
8432 : // Identify coordinate and boundary variables that we should
8433 : // ignore as Raster Bands.
8434 493 : char **papszIgnoreVars = nullptr;
8435 493 : NCDFGetCoordAndBoundVarFullNames(cdfid, &papszIgnoreVars);
8436 : // Filter variables to keep only valid 2+D raster bands and vector fields.
8437 493 : int nRasterVars = 0;
8438 493 : int nIgnoredVars = 0;
8439 493 : int nGroupID = -1;
8440 493 : int nVarID = -1;
8441 :
8442 : std::map<std::array<int, 3>, std::vector<std::pair<int, int>>>
8443 986 : oMap2DDimsToGroupAndVar;
8444 1138 : if ((poOpenInfo->nOpenFlags & GDAL_OF_VECTOR) != 0 &&
8445 152 : STARTS_WITH(CSLFetchNameValueDef(poDS->papszMetadata,
8446 : "NC_GLOBAL#mission_name", ""),
8447 1 : "Sentinel 3") &&
8448 1 : EQUAL(CSLFetchNameValueDef(poDS->papszMetadata,
8449 : "NC_GLOBAL#altimeter_sensor_name", ""),
8450 645 : "SRAL") &&
8451 1 : EQUAL(CSLFetchNameValueDef(poDS->papszMetadata,
8452 : "NC_GLOBAL#radiometer_sensor_name", ""),
8453 : "MWR"))
8454 : {
8455 1 : if (poDS->eAccess == GA_Update)
8456 : {
8457 0 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll
8458 : // deadlock with GDALDataset own mutex.
8459 0 : delete poDS;
8460 0 : return nullptr;
8461 : }
8462 1 : poDS->ProcessSentinel3_SRAL_MWR();
8463 : }
8464 : else
8465 : {
8466 492 : poDS->FilterVars(cdfid, (poOpenInfo->nOpenFlags & GDAL_OF_RASTER) != 0,
8467 643 : (poOpenInfo->nOpenFlags & GDAL_OF_VECTOR) != 0 &&
8468 151 : !bHasSimpleGeometries,
8469 : papszIgnoreVars, &nRasterVars, &nGroupID, &nVarID,
8470 : &nIgnoredVars, oMap2DDimsToGroupAndVar);
8471 : }
8472 493 : CSLDestroy(papszIgnoreVars);
8473 :
8474 : // Case where there is no raster variable
8475 493 : if (nRasterVars == 0 && !bTreatAsSubdataset)
8476 : {
8477 119 : poDS->GDALPamDataset::SetMetadata(poDS->papszMetadata);
8478 119 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll deadlock
8479 : // with GDALDataset own mutex.
8480 119 : poDS->TryLoadXML();
8481 : // If the dataset has been opened in raster mode only, exit
8482 119 : if ((poOpenInfo->nOpenFlags & GDAL_OF_RASTER) != 0 &&
8483 9 : (poOpenInfo->nOpenFlags & GDAL_OF_VECTOR) == 0)
8484 : {
8485 4 : delete poDS;
8486 4 : poDS = nullptr;
8487 : }
8488 : // Otherwise if the dataset is opened in vector mode, that there is
8489 : // no vector layer and we are in read-only, exit too.
8490 115 : else if (poDS->GetLayerCount() == 0 &&
8491 123 : (poOpenInfo->nOpenFlags & GDAL_OF_VECTOR) != 0 &&
8492 8 : poOpenInfo->eAccess == GA_ReadOnly)
8493 : {
8494 8 : delete poDS;
8495 8 : poDS = nullptr;
8496 : }
8497 119 : CPLAcquireMutex(hNCMutex, 1000.0);
8498 119 : return poDS;
8499 : }
8500 :
8501 : // We have more than one variable with 2 dimensions in the
8502 : // file, then treat this as a subdataset container dataset.
8503 374 : bool bSeveralVariablesAsBands = false;
8504 374 : const bool bListAllArrays = CPLTestBool(
8505 374 : CSLFetchNameValueDef(poDS->papszOpenOptions, "LIST_ALL_ARRAYS", "NO"));
8506 374 : if (bListAllArrays || ((nRasterVars > 1) && !bTreatAsSubdataset))
8507 : {
8508 28 : if (CPLFetchBool(poOpenInfo->papszOpenOptions, "VARIABLES_AS_BANDS",
8509 34 : false) &&
8510 6 : oMap2DDimsToGroupAndVar.size() == 1)
8511 : {
8512 6 : std::tie(nGroupID, nVarID) =
8513 12 : oMap2DDimsToGroupAndVar.begin()->second.front();
8514 6 : bSeveralVariablesAsBands = true;
8515 : }
8516 : else
8517 : {
8518 22 : poDS->CreateSubDatasetList(cdfid);
8519 22 : poDS->GDALPamDataset::SetMetadata(poDS->papszMetadata);
8520 22 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll
8521 : // deadlock with GDALDataset own mutex.
8522 22 : poDS->TryLoadXML();
8523 22 : CPLAcquireMutex(hNCMutex, 1000.0);
8524 22 : return poDS;
8525 : }
8526 : }
8527 :
8528 : // If we are not treating things as a subdataset, then capture
8529 : // the name of the single available variable as the subdataset.
8530 352 : if (!bTreatAsSubdataset)
8531 : {
8532 292 : char *pszVarName = nullptr;
8533 292 : NCDF_ERR(NCDFGetVarFullName(nGroupID, nVarID, &pszVarName));
8534 292 : osSubdatasetName = (pszVarName != nullptr ? pszVarName : "");
8535 292 : CPLFree(pszVarName);
8536 : }
8537 :
8538 : // We have ignored at least one variable, so we should report them
8539 : // as subdatasets for reference.
8540 352 : if (nIgnoredVars > 0 && !bTreatAsSubdataset)
8541 : {
8542 24 : CPLDebug("GDAL_netCDF",
8543 : "As %d variables were ignored, creating subdataset list "
8544 : "for reference. Variable #%d [%s] is the main variable",
8545 : nIgnoredVars, nVarID, osSubdatasetName.c_str());
8546 24 : poDS->CreateSubDatasetList(cdfid);
8547 : }
8548 :
8549 : // Open the NETCDF subdataset NETCDF:"filename":subdataset.
8550 352 : int var = -1;
8551 352 : NCDFOpenSubDataset(cdfid, osSubdatasetName.c_str(), &nGroupID, &var);
8552 : // Now we can forget the root cdfid and only use the selected group.
8553 352 : cdfid = nGroupID;
8554 352 : int nd = 0;
8555 352 : nc_inq_varndims(cdfid, var, &nd);
8556 :
8557 352 : poDS->m_anDimIds.resize(nd);
8558 :
8559 : // X, Y, Z position in array
8560 704 : std::vector<int> anBandDimPos(nd);
8561 :
8562 352 : nc_inq_vardimid(cdfid, var, poDS->m_anDimIds.data());
8563 :
8564 : // Check if somebody tried to pass a variable with less than 1D.
8565 352 : if (nd < 1)
8566 : {
8567 0 : CPLError(CE_Warning, CPLE_AppDefined,
8568 : "Variable has %d dimension(s) - not supported.", nd);
8569 0 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll deadlock
8570 : // with GDALDataset own mutex.
8571 0 : delete poDS;
8572 0 : CPLAcquireMutex(hNCMutex, 1000.0);
8573 0 : return nullptr;
8574 : }
8575 :
8576 : // CF-1 Convention
8577 : //
8578 : // Dimensions to appear in the relative order T, then Z, then Y,
8579 : // then X to the file. All other dimensions should, whenever
8580 : // possible, be placed to the left of the spatiotemporal
8581 : // dimensions.
8582 :
8583 : // Verify that dimensions are in the {T,Z,Y,X} or {T,Z,Y,X} order
8584 : // Ideally we should detect for other ordering and act accordingly
8585 : // Only done if file has Conventions=CF-* and only prints warning
8586 : // To disable set GDAL_NETCDF_VERIFY_DIMS=NO and to use only
8587 : // attributes (not varnames) set GDAL_NETCDF_VERIFY_DIMS=STRICT
8588 : const bool bCheckDims =
8589 704 : CPLTestBool(CPLGetConfigOption("GDAL_NETCDF_VERIFY_DIMS", "YES")) &&
8590 352 : STARTS_WITH_CI(szConventions, "CF");
8591 :
8592 352 : if (nd >= 2 && bCheckDims)
8593 : {
8594 267 : char szDimName1[NC_MAX_NAME + 1] = {};
8595 267 : char szDimName2[NC_MAX_NAME + 1] = {};
8596 267 : status = nc_inq_dimname(cdfid, poDS->m_anDimIds[nd - 1], szDimName1);
8597 267 : NCDF_ERR(status);
8598 267 : status = nc_inq_dimname(cdfid, poDS->m_anDimIds[nd - 2], szDimName2);
8599 267 : NCDF_ERR(status);
8600 425 : if (NCDFIsVarLongitude(cdfid, -1, szDimName1) == false &&
8601 158 : NCDFIsVarProjectionX(cdfid, -1, szDimName1) == false)
8602 : {
8603 4 : CPLError(CE_Warning, CPLE_AppDefined,
8604 : "dimension #%d (%s) is not a Longitude/X dimension.",
8605 : nd - 1, szDimName1);
8606 : }
8607 425 : if (NCDFIsVarLatitude(cdfid, -1, szDimName2) == false &&
8608 158 : NCDFIsVarProjectionY(cdfid, -1, szDimName2) == false)
8609 : {
8610 4 : CPLError(CE_Warning, CPLE_AppDefined,
8611 : "dimension #%d (%s) is not a Latitude/Y dimension.",
8612 : nd - 2, szDimName2);
8613 : }
8614 267 : if ((NCDFIsVarLongitude(cdfid, -1, szDimName2) ||
8615 269 : NCDFIsVarProjectionX(cdfid, -1, szDimName2)) &&
8616 2 : (NCDFIsVarLatitude(cdfid, -1, szDimName1) ||
8617 0 : NCDFIsVarProjectionY(cdfid, -1, szDimName1)))
8618 : {
8619 2 : poDS->bSwitchedXY = true;
8620 : }
8621 267 : if (nd >= 3)
8622 : {
8623 52 : char szDimName3[NC_MAX_NAME + 1] = {};
8624 : status =
8625 52 : nc_inq_dimname(cdfid, poDS->m_anDimIds[nd - 3], szDimName3);
8626 52 : NCDF_ERR(status);
8627 52 : if (nd >= 4)
8628 : {
8629 13 : char szDimName4[NC_MAX_NAME + 1] = {};
8630 : status =
8631 13 : nc_inq_dimname(cdfid, poDS->m_anDimIds[nd - 4], szDimName4);
8632 13 : NCDF_ERR(status);
8633 13 : if (NCDFIsVarVerticalCoord(cdfid, -1, szDimName3) == false)
8634 : {
8635 0 : CPLError(CE_Warning, CPLE_AppDefined,
8636 : "dimension #%d (%s) is not a Vertical dimension.",
8637 : nd - 3, szDimName3);
8638 : }
8639 13 : if (NCDFIsVarTimeCoord(cdfid, -1, szDimName4) == false)
8640 : {
8641 0 : CPLError(CE_Warning, CPLE_AppDefined,
8642 : "dimension #%d (%s) is not a Time dimension.",
8643 : nd - 4, szDimName4);
8644 : }
8645 : }
8646 : else
8647 : {
8648 75 : if (NCDFIsVarVerticalCoord(cdfid, -1, szDimName3) == false &&
8649 36 : NCDFIsVarTimeCoord(cdfid, -1, szDimName3) == false)
8650 : {
8651 0 : CPLError(CE_Warning, CPLE_AppDefined,
8652 : "dimension #%d (%s) is not a "
8653 : "Time or Vertical dimension.",
8654 : nd - 3, szDimName3);
8655 : }
8656 : }
8657 : }
8658 : }
8659 :
8660 : // For example for EMIT data (https://earth.jpl.nasa.gov/emit/data/data-portal/coverage-and-forecasts/),
8661 : // dimension order is downtrack, crosstrack, bands
8662 352 : bool bYXBandOrder = false;
8663 352 : if (nd == 3)
8664 : {
8665 44 : char szDimName[NC_MAX_NAME + 1] = {};
8666 44 : status = nc_inq_dimname(cdfid, poDS->m_anDimIds[2], szDimName);
8667 44 : NCDF_ERR(status);
8668 44 : bYXBandOrder =
8669 44 : strcmp(szDimName, "bands") == 0 || strcmp(szDimName, "band") == 0;
8670 : }
8671 :
8672 : // Get X dimensions information.
8673 : size_t xdim;
8674 352 : poDS->nXDimID = poDS->m_anDimIds[bYXBandOrder ? 1 : nd - 1];
8675 352 : nc_inq_dimlen(cdfid, poDS->nXDimID, &xdim);
8676 :
8677 : // Get Y dimension information.
8678 : size_t ydim;
8679 352 : if (nd >= 2)
8680 : {
8681 348 : poDS->nYDimID = poDS->m_anDimIds[bYXBandOrder ? 0 : nd - 2];
8682 348 : nc_inq_dimlen(cdfid, poDS->nYDimID, &ydim);
8683 : }
8684 : else
8685 : {
8686 4 : poDS->nYDimID = -1;
8687 4 : ydim = 1;
8688 : }
8689 :
8690 352 : if (xdim > INT_MAX || ydim > INT_MAX)
8691 : {
8692 0 : CPLError(CE_Failure, CPLE_AppDefined,
8693 : "Invalid raster dimensions: " CPL_FRMT_GUIB "x" CPL_FRMT_GUIB,
8694 : static_cast<GUIntBig>(xdim), static_cast<GUIntBig>(ydim));
8695 0 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll deadlock
8696 : // with GDALDataset own mutex.
8697 0 : delete poDS;
8698 0 : CPLAcquireMutex(hNCMutex, 1000.0);
8699 0 : return nullptr;
8700 : }
8701 :
8702 352 : poDS->nRasterXSize = static_cast<int>(xdim);
8703 352 : poDS->nRasterYSize = static_cast<int>(ydim);
8704 :
8705 352 : unsigned int k = 0;
8706 1131 : for (int j = 0; j < nd; j++)
8707 : {
8708 779 : if (poDS->m_anDimIds[j] == poDS->nXDimID)
8709 : {
8710 352 : anBandDimPos[0] = j; // Save Position of XDim
8711 352 : k++;
8712 : }
8713 779 : if (poDS->m_anDimIds[j] == poDS->nYDimID)
8714 : {
8715 348 : anBandDimPos[1] = j; // Save Position of YDim
8716 348 : k++;
8717 : }
8718 : }
8719 : // X and Y Dimension Ids were not found!
8720 352 : if ((nd >= 2 && k != 2) || (nd == 1 && k != 1))
8721 : {
8722 0 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll deadlock
8723 : // with GDALDataset own mutex.
8724 0 : delete poDS;
8725 0 : CPLAcquireMutex(hNCMutex, 1000.0);
8726 0 : return nullptr;
8727 : }
8728 :
8729 : // Read Metadata for this variable.
8730 :
8731 : // Should disable as is also done at band level, except driver needs the
8732 : // variables as metadata (e.g. projection).
8733 352 : poDS->ReadAttributes(cdfid, var);
8734 :
8735 : // Read Metadata for each dimension.
8736 352 : int *panDimIds = nullptr;
8737 352 : NCDFGetVisibleDims(cdfid, &ndims, &panDimIds);
8738 : // With NetCDF-4 groups panDimIds is not always [0..dim_count-1] like
8739 : // in NetCDF-3 because we see only the dimensions of the selected group
8740 : // and its parents.
8741 : // poDS->papszDimName is indexed by dim IDs, so it must contains all IDs
8742 : // [0..max(panDimIds)], but they are not all useful so we fill names
8743 : // of useless dims with empty string.
8744 352 : if (panDimIds)
8745 : {
8746 352 : const int nMaxDimId = *std::max_element(panDimIds, panDimIds + ndims);
8747 352 : std::set<int> oSetExistingDimIds;
8748 1171 : for (int i = 0; i < ndims; i++)
8749 : {
8750 819 : oSetExistingDimIds.insert(panDimIds[i]);
8751 : }
8752 352 : std::set<int> oSetDimIdsUsedByVar;
8753 1131 : for (int i = 0; i < nd; i++)
8754 : {
8755 779 : oSetDimIdsUsedByVar.insert(poDS->m_anDimIds[i]);
8756 : }
8757 1173 : for (int j = 0; j <= nMaxDimId; j++)
8758 : {
8759 : // Is j dim used?
8760 821 : if (oSetExistingDimIds.find(j) != oSetExistingDimIds.end())
8761 : {
8762 : // Useful dim.
8763 819 : char szTemp[NC_MAX_NAME + 1] = {};
8764 819 : status = nc_inq_dimname(cdfid, j, szTemp);
8765 819 : if (status != NC_NOERR)
8766 : {
8767 0 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll
8768 : // deadlock with GDALDataset own
8769 : // mutex.
8770 0 : delete poDS;
8771 0 : CPLAcquireMutex(hNCMutex, 1000.0);
8772 0 : return nullptr;
8773 : }
8774 819 : poDS->papszDimName.AddString(szTemp);
8775 :
8776 819 : if (oSetDimIdsUsedByVar.find(j) != oSetDimIdsUsedByVar.end())
8777 : {
8778 779 : int nDimGroupId = -1;
8779 779 : int nDimVarId = -1;
8780 779 : if (NCDFResolveVar(cdfid, poDS->papszDimName[j],
8781 779 : &nDimGroupId, &nDimVarId) == CE_None)
8782 : {
8783 579 : poDS->ReadAttributes(nDimGroupId, nDimVarId);
8784 : }
8785 : }
8786 : }
8787 : else
8788 : {
8789 : // Useless dim.
8790 2 : poDS->papszDimName.AddString("");
8791 : }
8792 : }
8793 352 : CPLFree(panDimIds);
8794 : }
8795 :
8796 : // Set projection info.
8797 704 : std::vector<std::string> aosRemovedMDItems;
8798 352 : if (nd > 1)
8799 : {
8800 348 : poDS->SetProjectionFromVar(cdfid, var,
8801 : /*bReadSRSOnly=*/false,
8802 : /* pszGivenGM = */ nullptr,
8803 : /* returnProjStr = */ nullptr,
8804 : /* sg = */ nullptr, &aosRemovedMDItems);
8805 : }
8806 :
8807 : // Override bottom-up with GDAL_NETCDF_BOTTOMUP config option.
8808 352 : const char *pszValue = CPLGetConfigOption("GDAL_NETCDF_BOTTOMUP", nullptr);
8809 352 : if (pszValue)
8810 : {
8811 24 : poDS->bBottomUp = CPLTestBool(pszValue);
8812 24 : CPLDebug("GDAL_netCDF",
8813 : "set bBottomUp=%d because GDAL_NETCDF_BOTTOMUP=%s",
8814 24 : static_cast<int>(poDS->bBottomUp), pszValue);
8815 : }
8816 :
8817 : // Save non-spatial dimension info.
8818 :
8819 352 : int *panBandZLev = nullptr;
8820 352 : int nDim = (nd >= 2) ? 2 : 1;
8821 : size_t lev_count;
8822 352 : size_t nTotLevCount = 1;
8823 352 : nc_type nType = NC_NAT;
8824 :
8825 704 : CPLString osExtraDimNames;
8826 :
8827 352 : if (nd > 2)
8828 : {
8829 60 : nDim = 2;
8830 60 : panBandZLev = static_cast<int *>(CPLCalloc(nd - 2, sizeof(int)));
8831 :
8832 60 : osExtraDimNames = "{";
8833 :
8834 60 : char szDimName[NC_MAX_NAME + 1] = {};
8835 :
8836 60 : bool bREPORT_EXTRA_DIM_VALUESWarningEmitted = false;
8837 259 : for (int j = 0; j < nd; j++)
8838 : {
8839 338 : if ((poDS->m_anDimIds[j] != poDS->nXDimID) &&
8840 139 : (poDS->m_anDimIds[j] != poDS->nYDimID))
8841 : {
8842 79 : nc_inq_dimlen(cdfid, poDS->m_anDimIds[j], &lev_count);
8843 79 : nTotLevCount *= lev_count;
8844 79 : panBandZLev[nDim - 2] = static_cast<int>(lev_count);
8845 79 : anBandDimPos[nDim] = j; // Save Position of ZDim
8846 : // Save non-spatial dimension names.
8847 79 : if (nc_inq_dimname(cdfid, poDS->m_anDimIds[j], szDimName) ==
8848 : NC_NOERR)
8849 : {
8850 79 : osExtraDimNames += szDimName;
8851 79 : if (j < nd - 3)
8852 : {
8853 19 : osExtraDimNames += ",";
8854 : }
8855 :
8856 79 : int nIdxGroupID = -1;
8857 79 : int nIdxVarID = Get1DVariableIndexedByDimension(
8858 79 : cdfid, poDS->m_anDimIds[j], szDimName, true,
8859 79 : &nIdxGroupID);
8860 79 : poDS->m_anExtraDimGroupIds.push_back(nIdxGroupID);
8861 79 : poDS->m_anExtraDimVarIds.push_back(nIdxVarID);
8862 :
8863 79 : if (nIdxVarID >= 0)
8864 : {
8865 70 : nc_inq_vartype(nIdxGroupID, nIdxVarID, &nType);
8866 : char szExtraDimDef[NC_MAX_NAME + 1];
8867 70 : snprintf(szExtraDimDef, sizeof(szExtraDimDef),
8868 : "{%ld,%d}", (long)lev_count, nType);
8869 : char szTemp[NC_MAX_NAME + 32 + 1];
8870 70 : snprintf(szTemp, sizeof(szTemp), "NETCDF_DIM_%s_DEF",
8871 : szDimName);
8872 70 : poDS->papszMetadata = CSLSetNameValue(
8873 : poDS->papszMetadata, szTemp, szExtraDimDef);
8874 :
8875 : // Retrieving data for unlimited dimensions might be
8876 : // costly on network storage, so don't do it.
8877 : // Each band will capture the value along the extra
8878 : // dimension in its NETCDF_DIM_xxxx band metadata item
8879 : // Addresses use case of
8880 : // https://lists.osgeo.org/pipermail/gdal-dev/2023-May/057209.html
8881 : const bool bIsLocal =
8882 70 : VSIIsLocal(osFilenameForNCOpen.c_str());
8883 : bool bListDimValues =
8884 71 : bIsLocal || lev_count == 1 ||
8885 1 : !NCDFIsUnlimitedDim(poDS->eFormat ==
8886 : NCDF_FORMAT_NC4,
8887 1 : cdfid, poDS->m_anDimIds[j]);
8888 : const char *pszGDAL_NETCDF_REPORT_EXTRA_DIM_VALUES =
8889 70 : CPLGetConfigOption(
8890 : "GDAL_NETCDF_REPORT_EXTRA_DIM_VALUES", nullptr);
8891 70 : if (pszGDAL_NETCDF_REPORT_EXTRA_DIM_VALUES)
8892 : {
8893 2 : bListDimValues = CPLTestBool(
8894 : pszGDAL_NETCDF_REPORT_EXTRA_DIM_VALUES);
8895 : }
8896 68 : else if (!bListDimValues && !bIsLocal &&
8897 1 : !bREPORT_EXTRA_DIM_VALUESWarningEmitted)
8898 : {
8899 1 : bREPORT_EXTRA_DIM_VALUESWarningEmitted = true;
8900 1 : CPLDebug(
8901 : "GDAL_netCDF",
8902 : "Listing extra dimension values is skipped "
8903 : "because this dataset is hosted on a network "
8904 : "file system, and such an operation could be "
8905 : "slow. If you still want to proceed, set the "
8906 : "GDAL_NETCDF_REPORT_EXTRA_DIM_VALUES "
8907 : "configuration option to YES");
8908 : }
8909 70 : if (bListDimValues)
8910 : {
8911 68 : char *pszTemp = nullptr;
8912 68 : if (NCDFGet1DVar(nIdxGroupID, nIdxVarID,
8913 68 : &pszTemp) == CE_None)
8914 : {
8915 68 : snprintf(szTemp, sizeof(szTemp),
8916 : "NETCDF_DIM_%s_VALUES", szDimName);
8917 68 : poDS->papszMetadata = CSLSetNameValue(
8918 : poDS->papszMetadata, szTemp, pszTemp);
8919 68 : CPLFree(pszTemp);
8920 : }
8921 : }
8922 : }
8923 : }
8924 : else
8925 : {
8926 0 : poDS->m_anExtraDimGroupIds.push_back(-1);
8927 0 : poDS->m_anExtraDimVarIds.push_back(-1);
8928 : }
8929 :
8930 79 : nDim++;
8931 : }
8932 : }
8933 60 : osExtraDimNames += "}";
8934 60 : poDS->papszMetadata = CSLSetNameValue(
8935 : poDS->papszMetadata, "NETCDF_DIM_EXTRA", osExtraDimNames);
8936 : }
8937 :
8938 : // Store Metadata.
8939 362 : for (const auto &osStr : aosRemovedMDItems)
8940 10 : poDS->papszMetadata =
8941 10 : CSLSetNameValue(poDS->papszMetadata, osStr.c_str(), nullptr);
8942 :
8943 352 : poDS->GDALPamDataset::SetMetadata(poDS->papszMetadata);
8944 :
8945 : // Create bands.
8946 :
8947 : // Arbitrary threshold.
8948 : int nMaxBandCount =
8949 352 : atoi(CPLGetConfigOption("GDAL_MAX_BAND_COUNT", "32768"));
8950 352 : if (nMaxBandCount <= 0)
8951 0 : nMaxBandCount = 32768;
8952 352 : if (nTotLevCount > static_cast<unsigned int>(nMaxBandCount))
8953 : {
8954 0 : CPLError(CE_Warning, CPLE_AppDefined,
8955 : "Limiting number of bands to %d instead of %u", nMaxBandCount,
8956 : static_cast<unsigned int>(nTotLevCount));
8957 0 : nTotLevCount = static_cast<unsigned int>(nMaxBandCount);
8958 : }
8959 352 : if (poDS->nRasterXSize == 0 || poDS->nRasterYSize == 0)
8960 : {
8961 0 : poDS->nRasterXSize = 0;
8962 0 : poDS->nRasterYSize = 0;
8963 0 : nTotLevCount = 0;
8964 0 : if (poDS->GetLayerCount() == 0)
8965 : {
8966 0 : CPLFree(panBandZLev);
8967 0 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll
8968 : // deadlock with GDALDataset own mutex.
8969 0 : delete poDS;
8970 0 : CPLAcquireMutex(hNCMutex, 1000.0);
8971 0 : return nullptr;
8972 : }
8973 : }
8974 352 : if (bSeveralVariablesAsBands)
8975 : {
8976 6 : const auto &listVariables = oMap2DDimsToGroupAndVar.begin()->second;
8977 24 : for (int iBand = 0; iBand < static_cast<int>(listVariables.size());
8978 : ++iBand)
8979 : {
8980 18 : int bandVarGroupId = listVariables[iBand].first;
8981 18 : int bandVarId = listVariables[iBand].second;
8982 : netCDFRasterBand *poBand = new netCDFRasterBand(
8983 0 : netCDFRasterBand::CONSTRUCTOR_OPEN(), poDS, bandVarGroupId,
8984 18 : bandVarId, nDim, 0, nullptr, anBandDimPos.data(), iBand + 1);
8985 18 : poDS->SetBand(iBand + 1, poBand);
8986 : }
8987 : }
8988 : else
8989 : {
8990 800 : for (unsigned int lev = 0; lev < nTotLevCount; lev++)
8991 : {
8992 : netCDFRasterBand *poBand = new netCDFRasterBand(
8993 0 : netCDFRasterBand::CONSTRUCTOR_OPEN(), poDS, cdfid, var, nDim,
8994 454 : lev, panBandZLev, anBandDimPos.data(), lev + 1);
8995 454 : poDS->SetBand(lev + 1, poBand);
8996 : }
8997 : }
8998 :
8999 352 : if (panBandZLev)
9000 60 : CPLFree(panBandZLev);
9001 : // Handle angular geographic coordinates here
9002 :
9003 : // Initialize any PAM information.
9004 352 : if (bTreatAsSubdataset)
9005 : {
9006 60 : poDS->SetPhysicalFilename(poDS->osFilename);
9007 60 : poDS->SetSubdatasetName(osSubdatasetName);
9008 : }
9009 :
9010 352 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll deadlock with
9011 : // GDALDataset own mutex.
9012 352 : poDS->TryLoadXML();
9013 :
9014 352 : if (bTreatAsSubdataset)
9015 60 : poDS->oOvManager.Initialize(poDS, ":::VIRTUAL:::");
9016 : else
9017 292 : poDS->oOvManager.Initialize(poDS, poDS->osFilename);
9018 :
9019 352 : CPLAcquireMutex(hNCMutex, 1000.0);
9020 :
9021 352 : return poDS;
9022 : }
9023 :
9024 : /************************************************************************/
9025 : /* CopyMetadata() */
9026 : /* */
9027 : /* Create a copy of metadata for NC_GLOBAL or a variable */
9028 : /************************************************************************/
9029 :
9030 157 : static void CopyMetadata(GDALDataset *poSrcDS, GDALRasterBand *poSrcBand,
9031 : GDALRasterBand *poDstBand, int nCdfId, int CDFVarID,
9032 : const char *pszPrefix)
9033 : {
9034 : // Remove the following band meta but set them later from band data.
9035 157 : const char *const papszIgnoreBand[] = {
9036 : CF_ADD_OFFSET, CF_SCALE_FACTOR, "valid_range", "_Unsigned",
9037 : NCDF_FillValue, "coordinates", nullptr};
9038 157 : const char *const papszIgnoreGlobal[] = {"NETCDF_DIM_EXTRA", nullptr};
9039 :
9040 157 : CSLConstList papszMetadata = nullptr;
9041 157 : if (poSrcDS)
9042 : {
9043 66 : papszMetadata = poSrcDS->GetMetadata();
9044 : }
9045 91 : else if (poSrcBand)
9046 : {
9047 91 : papszMetadata = poSrcBand->GetMetadata();
9048 : }
9049 :
9050 637 : for (const auto &[pszKey, pszValue] : cpl::IterateNameValue(papszMetadata))
9051 : {
9052 : #ifdef NCDF_DEBUG
9053 : CPLDebug("GDAL_netCDF", "copy metadata [%s]=[%s]", pszKey, pszValue);
9054 : #endif
9055 :
9056 480 : CPLString osMetaName(pszKey);
9057 :
9058 : // Check for items that match pszPrefix if applicable.
9059 480 : if (pszPrefix && !EQUAL(pszPrefix, ""))
9060 : {
9061 : // Remove prefix.
9062 115 : if (STARTS_WITH(osMetaName.c_str(), pszPrefix))
9063 : {
9064 17 : osMetaName = osMetaName.substr(strlen(pszPrefix));
9065 : }
9066 : // Only copy items that match prefix.
9067 : else
9068 : {
9069 98 : continue;
9070 : }
9071 : }
9072 :
9073 : // Fix various issues with metadata translation.
9074 382 : if (CDFVarID == NC_GLOBAL)
9075 : {
9076 : // Do not copy items in papszIgnoreGlobal and NETCDF_DIM_*.
9077 481 : if ((CSLFindString(papszIgnoreGlobal, osMetaName) != -1) ||
9078 238 : (STARTS_WITH(osMetaName, "NETCDF_DIM_")))
9079 21 : continue;
9080 : // Remove NC_GLOBAL prefix for netcdf global Metadata.
9081 222 : else if (STARTS_WITH(osMetaName, "NC_GLOBAL#"))
9082 : {
9083 33 : osMetaName = osMetaName.substr(strlen("NC_GLOBAL#"));
9084 : }
9085 : // GDAL Metadata renamed as GDAL-[meta].
9086 189 : else if (strstr(osMetaName, "#") == nullptr)
9087 : {
9088 16 : osMetaName = "GDAL_" + osMetaName;
9089 : }
9090 : // Keep time, lev and depth information for safe-keeping.
9091 : // Time and vertical coordinate handling need improvements.
9092 : /*
9093 : else if( STARTS_WITH(szMetaName, "time#") )
9094 : {
9095 : szMetaName[4] = '-';
9096 : }
9097 : else if( STARTS_WITH(szMetaName, "lev#") )
9098 : {
9099 : szMetaName[3] = '-';
9100 : }
9101 : else if( STARTS_WITH(szMetaName, "depth#") )
9102 : {
9103 : szMetaName[5] = '-';
9104 : }
9105 : */
9106 : // Only copy data without # (previously all data was copied).
9107 222 : if (strstr(osMetaName, "#") != nullptr)
9108 173 : continue;
9109 : // netCDF attributes do not like the '#' character.
9110 : // for( unsigned int h=0; h < strlen(szMetaName) -1 ; h++ ) {
9111 : // if( szMetaName[h] == '#') szMetaName[h] = '-';
9112 : // }
9113 : }
9114 : else
9115 : {
9116 : // Do not copy varname, stats, NETCDF_DIM_*, nodata
9117 : // and items in papszIgnoreBand.
9118 139 : if (STARTS_WITH(osMetaName, "NETCDF_VARNAME") ||
9119 107 : STARTS_WITH(osMetaName, "STATISTICS_") ||
9120 107 : STARTS_WITH(osMetaName, "NETCDF_DIM_") ||
9121 74 : STARTS_WITH(osMetaName, "missing_value") ||
9122 293 : STARTS_WITH(osMetaName, "_FillValue") ||
9123 47 : CSLFindString(papszIgnoreBand, osMetaName) != -1)
9124 97 : continue;
9125 : }
9126 :
9127 : #ifdef NCDF_DEBUG
9128 : CPLDebug("GDAL_netCDF", "copy name=[%s] value=[%s]", osMetaName.c_str(),
9129 : pszValue);
9130 : #endif
9131 91 : if (NCDFPutAttr(nCdfId, CDFVarID, osMetaName, pszValue) != CE_None)
9132 : {
9133 0 : CPLDebug("GDAL_netCDF", "NCDFPutAttr(%d, %d, %s, %s) failed",
9134 : nCdfId, CDFVarID, osMetaName.c_str(), pszValue);
9135 : }
9136 : }
9137 :
9138 : // Set add_offset and scale_factor here if present.
9139 157 : if (poSrcBand && poDstBand)
9140 : {
9141 :
9142 91 : int bGotAddOffset = FALSE;
9143 91 : const double dfAddOffset = poSrcBand->GetOffset(&bGotAddOffset);
9144 91 : int bGotScale = FALSE;
9145 91 : const double dfScale = poSrcBand->GetScale(&bGotScale);
9146 :
9147 91 : if (bGotAddOffset && dfAddOffset != 0.0)
9148 1 : poDstBand->SetOffset(dfAddOffset);
9149 91 : if (bGotScale && dfScale != 1.0)
9150 1 : poDstBand->SetScale(dfScale);
9151 : }
9152 157 : }
9153 :
9154 : /************************************************************************/
9155 : /* CreateLL() */
9156 : /* */
9157 : /* Shared functionality between netCDFDataset::Create() and */
9158 : /* netCDF::CreateCopy() for creating netcdf file based on a set of */
9159 : /* options and a configuration. */
9160 : /************************************************************************/
9161 :
9162 198 : netCDFDataset *netCDFDataset::CreateLL(const char *pszFilename, int nXSize,
9163 : int nYSize, int nBandsIn,
9164 : char **papszOptions)
9165 : {
9166 198 : if (!((nXSize == 0 && nYSize == 0 && nBandsIn == 0) ||
9167 126 : (nXSize > 0 && nYSize > 0 && nBandsIn > 0)))
9168 : {
9169 1 : return nullptr;
9170 : }
9171 :
9172 197 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll deadlock with
9173 : // GDALDataset own mutex.
9174 197 : netCDFDataset *poDS = new netCDFDataset();
9175 197 : CPLAcquireMutex(hNCMutex, 1000.0);
9176 :
9177 197 : poDS->nRasterXSize = nXSize;
9178 197 : poDS->nRasterYSize = nYSize;
9179 197 : poDS->eAccess = GA_Update;
9180 197 : poDS->osFilename = pszFilename;
9181 :
9182 : // From gtiff driver, is this ok?
9183 : /*
9184 : poDS->nBlockXSize = nXSize;
9185 : poDS->nBlockYSize = 1;
9186 : poDS->nBlocksPerBand =
9187 : DIV_ROUND_UP((nYSize, poDS->nBlockYSize))
9188 : * DIV_ROUND_UP((nXSize, poDS->nBlockXSize));
9189 : */
9190 :
9191 : // process options.
9192 197 : poDS->papszCreationOptions = CSLDuplicate(papszOptions);
9193 197 : poDS->ProcessCreationOptions();
9194 :
9195 197 : if (poDS->eMultipleLayerBehavior == SEPARATE_FILES)
9196 : {
9197 : VSIStatBuf sStat;
9198 2 : if (VSIStat(pszFilename, &sStat) == 0)
9199 : {
9200 0 : if (!VSI_ISDIR(sStat.st_mode))
9201 : {
9202 0 : CPLError(CE_Failure, CPLE_FileIO,
9203 : "%s is an existing file, but not a directory",
9204 : pszFilename);
9205 0 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll
9206 : // deadlock with GDALDataset own
9207 : // mutex.
9208 0 : delete poDS;
9209 0 : CPLAcquireMutex(hNCMutex, 1000.0);
9210 0 : return nullptr;
9211 : }
9212 : }
9213 2 : else if (VSIMkdir(pszFilename, 0755) != 0)
9214 : {
9215 1 : CPLError(CE_Failure, CPLE_FileIO, "Cannot create %s directory",
9216 : pszFilename);
9217 1 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll
9218 : // deadlock with GDALDataset own mutex.
9219 1 : delete poDS;
9220 1 : CPLAcquireMutex(hNCMutex, 1000.0);
9221 1 : return nullptr;
9222 : }
9223 :
9224 1 : return poDS;
9225 : }
9226 : // Create the dataset.
9227 390 : CPLString osFilenameForNCCreate(pszFilename);
9228 : #if defined(_WIN32) && !defined(NETCDF_USES_UTF8)
9229 : if (CPLTestBool(CPLGetConfigOption("GDAL_FILENAME_IS_UTF8", "YES")))
9230 : {
9231 : char *pszTemp =
9232 : CPLRecode(osFilenameForNCCreate, CPL_ENC_UTF8, "CP_ACP");
9233 : osFilenameForNCCreate = pszTemp;
9234 : CPLFree(pszTemp);
9235 : }
9236 : #endif
9237 :
9238 : #if defined(_WIN32)
9239 : {
9240 : // Works around bug of msys2 netCDF 4.9.0 package where nc_create()
9241 : // crashes
9242 : VSIStatBuf sStat;
9243 : const std::string osDirname =
9244 : CPLGetDirnameSafe(osFilenameForNCCreate.c_str());
9245 : if (VSIStat(osDirname.c_str(), &sStat) != 0)
9246 : {
9247 : CPLError(CE_Failure, CPLE_OpenFailed,
9248 : "Unable to create netCDF file %s: non existing output "
9249 : "directory",
9250 : pszFilename);
9251 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll
9252 : // deadlock with GDALDataset own mutex.
9253 : delete poDS;
9254 : CPLAcquireMutex(hNCMutex, 1000.0);
9255 : return nullptr;
9256 : }
9257 : }
9258 : #endif
9259 :
9260 : int status =
9261 195 : nc_create(osFilenameForNCCreate, poDS->nCreateMode, &(poDS->cdfid));
9262 :
9263 : // Put into define mode.
9264 195 : poDS->SetDefineMode(true);
9265 :
9266 195 : if (status != NC_NOERR)
9267 : {
9268 30 : CPLError(CE_Failure, CPLE_OpenFailed,
9269 : "Unable to create netCDF file %s (Error code %d): %s .",
9270 : pszFilename, status, nc_strerror(status));
9271 30 : CPLReleaseMutex(hNCMutex); // Release mutex otherwise we'll deadlock
9272 : // with GDALDataset own mutex.
9273 30 : delete poDS;
9274 30 : CPLAcquireMutex(hNCMutex, 1000.0);
9275 30 : return nullptr;
9276 : }
9277 :
9278 : // Define dimensions.
9279 165 : if (nXSize > 0 && nYSize > 0)
9280 : {
9281 112 : poDS->papszDimName.AddString(NCDF_DIMNAME_X);
9282 : status =
9283 112 : nc_def_dim(poDS->cdfid, NCDF_DIMNAME_X, nXSize, &(poDS->nXDimID));
9284 112 : NCDF_ERR(status);
9285 112 : CPLDebug("GDAL_netCDF", "status nc_def_dim(%d, %s, %d, -) got id %d",
9286 : poDS->cdfid, NCDF_DIMNAME_X, nXSize, poDS->nXDimID);
9287 :
9288 112 : poDS->papszDimName.AddString(NCDF_DIMNAME_Y);
9289 : status =
9290 112 : nc_def_dim(poDS->cdfid, NCDF_DIMNAME_Y, nYSize, &(poDS->nYDimID));
9291 112 : NCDF_ERR(status);
9292 112 : CPLDebug("GDAL_netCDF", "status nc_def_dim(%d, %s, %d, -) got id %d",
9293 : poDS->cdfid, NCDF_DIMNAME_Y, nYSize, poDS->nYDimID);
9294 : }
9295 :
9296 165 : return poDS;
9297 : }
9298 :
9299 : /************************************************************************/
9300 : /* Create() */
9301 : /************************************************************************/
9302 :
9303 126 : GDALDataset *netCDFDataset::Create(const char *pszFilename, int nXSize,
9304 : int nYSize, int nBandsIn, GDALDataType eType,
9305 : char **papszOptions)
9306 : {
9307 126 : CPLDebug("GDAL_netCDF", "\n=====\nnetCDFDataset::Create(%s, ...)",
9308 : pszFilename);
9309 :
9310 : const char *legacyCreationOp =
9311 126 : CSLFetchNameValueDef(papszOptions, "GEOMETRY_ENCODING", "CF_1.8");
9312 252 : std::string legacyCreationOp_s = std::string(legacyCreationOp);
9313 :
9314 : // Check legacy creation op FIRST
9315 :
9316 126 : bool legacyCreateMode = false;
9317 :
9318 126 : if (nXSize != 0 || nYSize != 0 || nBandsIn != 0)
9319 : {
9320 56 : legacyCreateMode = true;
9321 : }
9322 70 : else if (legacyCreationOp_s == "CF_1.8")
9323 : {
9324 54 : legacyCreateMode = false;
9325 : }
9326 :
9327 16 : else if (legacyCreationOp_s == "WKT")
9328 : {
9329 16 : legacyCreateMode = true;
9330 : }
9331 :
9332 : else
9333 : {
9334 0 : CPLError(
9335 : CE_Failure, CPLE_NotSupported,
9336 : "Dataset creation option GEOMETRY_ENCODING=%s is not supported.",
9337 : legacyCreationOp_s.c_str());
9338 0 : return nullptr;
9339 : }
9340 :
9341 252 : CPLStringList aosOptions(CSLDuplicate(papszOptions));
9342 238 : if (aosOptions.FetchNameValue("FORMAT") == nullptr &&
9343 112 : (eType == GDT_UInt16 || eType == GDT_UInt32 || eType == GDT_UInt64 ||
9344 : eType == GDT_Int64))
9345 : {
9346 10 : CPLDebug("netCDF", "Selecting FORMAT=NC4 due to data type");
9347 10 : aosOptions.SetNameValue("FORMAT", "NC4");
9348 : }
9349 :
9350 252 : CPLStringList aosBandNames;
9351 126 : if (const char *pszBandNames = aosOptions.FetchNameValue("BAND_NAMES"))
9352 : {
9353 : aosBandNames =
9354 2 : CSLTokenizeString2(pszBandNames, ",", CSLT_HONOURSTRINGS);
9355 :
9356 2 : if (aosBandNames.Count() != nBandsIn)
9357 : {
9358 1 : CPLError(CE_Failure, CPLE_OpenFailed,
9359 : "Attempted to create netCDF with %d bands but %d names "
9360 : "provided in BAND_NAMES.",
9361 : nBandsIn, aosBandNames.Count());
9362 :
9363 1 : return nullptr;
9364 : }
9365 : }
9366 :
9367 250 : CPLMutexHolderD(&hNCMutex);
9368 :
9369 125 : auto poDS = netCDFDataset::CreateLL(pszFilename, nXSize, nYSize, nBandsIn,
9370 : aosOptions.List());
9371 :
9372 125 : if (!poDS)
9373 19 : return nullptr;
9374 :
9375 106 : if (!legacyCreateMode)
9376 : {
9377 37 : poDS->bSGSupport = true;
9378 37 : poDS->vcdf.enableFullVirtualMode();
9379 : }
9380 :
9381 : else
9382 : {
9383 69 : poDS->bSGSupport = false;
9384 : }
9385 :
9386 : // Should we write signed or unsigned byte?
9387 : // TODO should this only be done in Create()
9388 106 : poDS->bSignedData = true;
9389 106 : const char *pszValue = CSLFetchNameValueDef(papszOptions, "PIXELTYPE", "");
9390 106 : if (eType == GDT_Byte && !EQUAL(pszValue, "SIGNEDBYTE"))
9391 15 : poDS->bSignedData = false;
9392 :
9393 : // Add Conventions, GDAL info and history.
9394 106 : if (poDS->cdfid >= 0)
9395 : {
9396 : const char *CF_Vector_Conv =
9397 173 : poDS->bSGSupport ||
9398 : // Use of variable length strings require CF-1.8
9399 68 : EQUAL(aosOptions.FetchNameValueDef("FORMAT", ""), "NC4")
9400 : ? NCDF_CONVENTIONS_CF_V1_8
9401 173 : : NCDF_CONVENTIONS_CF_V1_6;
9402 105 : poDS->bWriteGDALVersion = CPLTestBool(
9403 : CSLFetchNameValueDef(papszOptions, "WRITE_GDAL_VERSION", "YES"));
9404 105 : poDS->bWriteGDALHistory = CPLTestBool(
9405 : CSLFetchNameValueDef(papszOptions, "WRITE_GDAL_HISTORY", "YES"));
9406 105 : NCDFAddGDALHistory(poDS->cdfid, pszFilename, poDS->bWriteGDALVersion,
9407 105 : poDS->bWriteGDALHistory, "", "Create",
9408 : (nBandsIn == 0) ? CF_Vector_Conv
9409 : : GDAL_DEFAULT_NCDF_CONVENTIONS);
9410 : }
9411 :
9412 : // Define bands.
9413 197 : for (int iBand = 1; iBand <= nBandsIn; iBand++)
9414 : {
9415 : const char *pszBandName =
9416 91 : aosBandNames.empty() ? nullptr : aosBandNames[iBand - 1];
9417 :
9418 91 : poDS->SetBand(iBand, new netCDFRasterBand(
9419 91 : netCDFRasterBand::CONSTRUCTOR_CREATE(), poDS,
9420 91 : eType, iBand, poDS->bSignedData, pszBandName));
9421 : }
9422 :
9423 106 : CPLDebug("GDAL_netCDF", "netCDFDataset::Create(%s, ...) done", pszFilename);
9424 : // Return same dataset.
9425 106 : return poDS;
9426 : }
9427 :
9428 : template <class T>
9429 91 : static CPLErr NCDFCopyBand(GDALRasterBand *poSrcBand, GDALRasterBand *poDstBand,
9430 : int nXSize, int nYSize, GDALProgressFunc pfnProgress,
9431 : void *pProgressData)
9432 : {
9433 91 : GDALDataType eDT = poSrcBand->GetRasterDataType();
9434 91 : CPLErr eErr = CE_None;
9435 91 : T *patScanline = static_cast<T *>(CPLMalloc(nXSize * sizeof(T)));
9436 :
9437 6308 : for (int iLine = 0; iLine < nYSize && eErr == CE_None; iLine++)
9438 : {
9439 6217 : eErr = poSrcBand->RasterIO(GF_Read, 0, iLine, nXSize, 1, patScanline,
9440 : nXSize, 1, eDT, 0, 0, nullptr);
9441 6217 : if (eErr != CE_None)
9442 : {
9443 0 : CPLDebug(
9444 : "GDAL_netCDF",
9445 : "NCDFCopyBand(), poSrcBand->RasterIO() returned error code %d",
9446 : eErr);
9447 : }
9448 : else
9449 : {
9450 6217 : eErr =
9451 : poDstBand->RasterIO(GF_Write, 0, iLine, nXSize, 1, patScanline,
9452 : nXSize, 1, eDT, 0, 0, nullptr);
9453 6217 : if (eErr != CE_None)
9454 0 : CPLDebug("GDAL_netCDF",
9455 : "NCDFCopyBand(), poDstBand->RasterIO() returned error "
9456 : "code %d",
9457 : eErr);
9458 : }
9459 :
9460 6217 : if (nYSize > 10 && (iLine % (nYSize / 10) == 1))
9461 : {
9462 277 : if (!pfnProgress(1.0 * iLine / nYSize, nullptr, pProgressData))
9463 : {
9464 0 : eErr = CE_Failure;
9465 0 : CPLError(CE_Failure, CPLE_UserInterrupt,
9466 : "User terminated CreateCopy()");
9467 : }
9468 : }
9469 : }
9470 :
9471 91 : CPLFree(patScanline);
9472 :
9473 91 : pfnProgress(1.0, nullptr, pProgressData);
9474 :
9475 91 : return eErr;
9476 : }
9477 :
9478 : /************************************************************************/
9479 : /* CreateCopy() */
9480 : /************************************************************************/
9481 :
9482 : GDALDataset *
9483 82 : netCDFDataset::CreateCopy(const char *pszFilename, GDALDataset *poSrcDS,
9484 : CPL_UNUSED int bStrict, char **papszOptions,
9485 : GDALProgressFunc pfnProgress, void *pProgressData)
9486 : {
9487 164 : CPLMutexHolderD(&hNCMutex);
9488 :
9489 82 : CPLDebug("GDAL_netCDF", "\n=====\nnetCDFDataset::CreateCopy(%s, ...)",
9490 : pszFilename);
9491 :
9492 82 : if (poSrcDS->GetRootGroup())
9493 : {
9494 5 : auto poDrv = GDALDriver::FromHandle(GDALGetDriverByName("netCDF"));
9495 5 : if (poDrv)
9496 : {
9497 5 : return poDrv->DefaultCreateCopy(pszFilename, poSrcDS, bStrict,
9498 : papszOptions, pfnProgress,
9499 5 : pProgressData);
9500 : }
9501 : }
9502 :
9503 77 : const int nBands = poSrcDS->GetRasterCount();
9504 77 : const int nXSize = poSrcDS->GetRasterXSize();
9505 77 : const int nYSize = poSrcDS->GetRasterYSize();
9506 77 : const char *pszWKT = poSrcDS->GetProjectionRef();
9507 :
9508 : // Check input bands for errors.
9509 77 : if (nBands == 0)
9510 : {
9511 1 : CPLError(CE_Failure, CPLE_NotSupported,
9512 : "NetCDF driver does not support "
9513 : "source dataset with zero band.");
9514 1 : return nullptr;
9515 : }
9516 :
9517 76 : GDALDataType eDT = GDT_Unknown;
9518 76 : GDALRasterBand *poSrcBand = nullptr;
9519 181 : for (int iBand = 1; iBand <= nBands; iBand++)
9520 : {
9521 109 : poSrcBand = poSrcDS->GetRasterBand(iBand);
9522 109 : eDT = poSrcBand->GetRasterDataType();
9523 109 : if (eDT == GDT_Unknown || GDALDataTypeIsComplex(eDT))
9524 : {
9525 4 : CPLError(CE_Failure, CPLE_NotSupported,
9526 : "NetCDF driver does not support source dataset with band "
9527 : "of complex type.");
9528 4 : return nullptr;
9529 : }
9530 : }
9531 :
9532 144 : CPLStringList aosBandNames;
9533 72 : if (const char *pszBandNames =
9534 72 : CSLFetchNameValue(papszOptions, "BAND_NAMES"))
9535 : {
9536 : aosBandNames =
9537 2 : CSLTokenizeString2(pszBandNames, ",", CSLT_HONOURSTRINGS);
9538 :
9539 2 : if (aosBandNames.Count() != nBands)
9540 : {
9541 1 : CPLError(CE_Failure, CPLE_OpenFailed,
9542 : "Attempted to create netCDF with %d bands but %d names "
9543 : "provided in BAND_NAMES.",
9544 : nBands, aosBandNames.Count());
9545 :
9546 1 : return nullptr;
9547 : }
9548 : }
9549 :
9550 71 : if (!pfnProgress(0.0, nullptr, pProgressData))
9551 0 : return nullptr;
9552 :
9553 : // Same as in Create().
9554 142 : CPLStringList aosOptions(CSLDuplicate(papszOptions));
9555 133 : if (aosOptions.FetchNameValue("FORMAT") == nullptr &&
9556 62 : (eDT == GDT_UInt16 || eDT == GDT_UInt32 || eDT == GDT_UInt64 ||
9557 : eDT == GDT_Int64))
9558 : {
9559 6 : CPLDebug("netCDF", "Selecting FORMAT=NC4 due to data type");
9560 6 : aosOptions.SetNameValue("FORMAT", "NC4");
9561 : }
9562 71 : netCDFDataset *poDS = netCDFDataset::CreateLL(pszFilename, nXSize, nYSize,
9563 : nBands, aosOptions.List());
9564 71 : if (!poDS)
9565 13 : return nullptr;
9566 :
9567 : // Copy global metadata.
9568 : // Add Conventions, GDAL info and history.
9569 58 : CopyMetadata(poSrcDS, nullptr, nullptr, poDS->cdfid, NC_GLOBAL, nullptr);
9570 58 : const bool bWriteGDALVersion = CPLTestBool(
9571 : CSLFetchNameValueDef(papszOptions, "WRITE_GDAL_VERSION", "YES"));
9572 58 : const bool bWriteGDALHistory = CPLTestBool(
9573 : CSLFetchNameValueDef(papszOptions, "WRITE_GDAL_HISTORY", "YES"));
9574 58 : NCDFAddGDALHistory(
9575 : poDS->cdfid, pszFilename, bWriteGDALVersion, bWriteGDALHistory,
9576 58 : poSrcDS->GetMetadataItem("NC_GLOBAL#history"), "CreateCopy",
9577 58 : poSrcDS->GetMetadataItem("NC_GLOBAL#Conventions"));
9578 :
9579 58 : pfnProgress(0.1, nullptr, pProgressData);
9580 :
9581 : // Check for extra dimensions.
9582 58 : int nDim = 2;
9583 : char **papszExtraDimNames =
9584 58 : NCDFTokenizeArray(poSrcDS->GetMetadataItem("NETCDF_DIM_EXTRA", ""));
9585 58 : char **papszExtraDimValues = nullptr;
9586 :
9587 58 : if (papszExtraDimNames != nullptr && CSLCount(papszExtraDimNames) > 0)
9588 : {
9589 5 : size_t nDimSizeTot = 1;
9590 : // first make sure dimensions lengths compatible with band count
9591 : // for( int i=0; i<CSLCount(papszExtraDimNames ); i++ ) {
9592 13 : for (int i = CSLCount(papszExtraDimNames) - 1; i >= 0; i--)
9593 : {
9594 : char szTemp[NC_MAX_NAME + 32 + 1];
9595 8 : snprintf(szTemp, sizeof(szTemp), "NETCDF_DIM_%s_DEF",
9596 8 : papszExtraDimNames[i]);
9597 : papszExtraDimValues =
9598 8 : NCDFTokenizeArray(poSrcDS->GetMetadataItem(szTemp, ""));
9599 8 : const size_t nDimSize = atol(papszExtraDimValues[0]);
9600 8 : CSLDestroy(papszExtraDimValues);
9601 8 : nDimSizeTot *= nDimSize;
9602 : }
9603 5 : if (nDimSizeTot == (size_t)nBands)
9604 : {
9605 5 : nDim = 2 + CSLCount(papszExtraDimNames);
9606 : }
9607 : else
9608 : {
9609 : // if nBands != #bands computed raise a warning
9610 : // just issue a debug message, because it was probably intentional
9611 0 : CPLDebug("GDAL_netCDF",
9612 : "Warning: Number of bands (%d) is not compatible with "
9613 : "dimensions "
9614 : "(total=%ld names=%s)",
9615 : nBands, (long)nDimSizeTot,
9616 0 : poSrcDS->GetMetadataItem("NETCDF_DIM_EXTRA", ""));
9617 0 : CSLDestroy(papszExtraDimNames);
9618 0 : papszExtraDimNames = nullptr;
9619 : }
9620 : }
9621 :
9622 58 : int *panDimIds = static_cast<int *>(CPLCalloc(nDim, sizeof(int)));
9623 58 : int *panBandDimPos = static_cast<int *>(CPLCalloc(nDim, sizeof(int)));
9624 :
9625 : nc_type nVarType;
9626 58 : int *panBandZLev = nullptr;
9627 58 : int *panDimVarIds = nullptr;
9628 :
9629 58 : if (nDim > 2)
9630 : {
9631 5 : panBandZLev = static_cast<int *>(CPLCalloc(nDim - 2, sizeof(int)));
9632 5 : panDimVarIds = static_cast<int *>(CPLCalloc(nDim - 2, sizeof(int)));
9633 :
9634 : // Define all dims.
9635 13 : for (int i = CSLCount(papszExtraDimNames) - 1; i >= 0; i--)
9636 : {
9637 8 : poDS->papszDimName.AddString(papszExtraDimNames[i]);
9638 : char szTemp[NC_MAX_NAME + 32 + 1];
9639 8 : snprintf(szTemp, sizeof(szTemp), "NETCDF_DIM_%s_DEF",
9640 8 : papszExtraDimNames[i]);
9641 : papszExtraDimValues =
9642 8 : NCDFTokenizeArray(poSrcDS->GetMetadataItem(szTemp, ""));
9643 8 : const int nDimSize = papszExtraDimValues && papszExtraDimValues[0]
9644 16 : ? atoi(papszExtraDimValues[0])
9645 : : 0;
9646 : // nc_type is an enum in netcdf-3, needs casting.
9647 8 : nVarType = static_cast<nc_type>(papszExtraDimValues &&
9648 8 : papszExtraDimValues[0] &&
9649 8 : papszExtraDimValues[1]
9650 8 : ? atol(papszExtraDimValues[1])
9651 : : 0);
9652 8 : CSLDestroy(papszExtraDimValues);
9653 8 : panBandZLev[i] = nDimSize;
9654 8 : panBandDimPos[i + 2] = i; // Save Position of ZDim.
9655 :
9656 : // Define dim.
9657 16 : int status = nc_def_dim(poDS->cdfid, papszExtraDimNames[i],
9658 8 : nDimSize, &(panDimIds[i]));
9659 8 : NCDF_ERR(status);
9660 :
9661 : // Define dim var.
9662 8 : int anDim[1] = {panDimIds[i]};
9663 16 : status = nc_def_var(poDS->cdfid, papszExtraDimNames[i], nVarType, 1,
9664 8 : anDim, &(panDimVarIds[i]));
9665 8 : NCDF_ERR(status);
9666 :
9667 : // Add dim metadata, using global var# items.
9668 8 : snprintf(szTemp, sizeof(szTemp), "%s#", papszExtraDimNames[i]);
9669 8 : CopyMetadata(poSrcDS, nullptr, nullptr, poDS->cdfid,
9670 8 : panDimVarIds[i], szTemp);
9671 : }
9672 : }
9673 :
9674 : // Copy GeoTransform and Projection.
9675 :
9676 : // Copy geolocation info.
9677 58 : char **papszGeolocationInfo = poSrcDS->GetMetadata("GEOLOCATION");
9678 58 : if (papszGeolocationInfo != nullptr)
9679 5 : poDS->GDALPamDataset::SetMetadata(papszGeolocationInfo, "GEOLOCATION");
9680 :
9681 : // Copy geotransform.
9682 58 : bool bGotGeoTransform = false;
9683 58 : GDALGeoTransform gt;
9684 58 : CPLErr eErr = poSrcDS->GetGeoTransform(gt);
9685 58 : if (eErr == CE_None)
9686 : {
9687 40 : poDS->SetGeoTransform(gt);
9688 : // Disable AddProjectionVars() from being called.
9689 40 : bGotGeoTransform = true;
9690 40 : poDS->m_bHasGeoTransform = false;
9691 : }
9692 :
9693 : // Copy projection.
9694 58 : void *pScaledProgress = nullptr;
9695 58 : if (bGotGeoTransform || (pszWKT && pszWKT[0] != 0))
9696 : {
9697 41 : poDS->SetProjection(pszWKT ? pszWKT : "");
9698 :
9699 : // Now we can call AddProjectionVars() directly.
9700 41 : poDS->m_bHasGeoTransform = bGotGeoTransform;
9701 41 : poDS->AddProjectionVars(true, nullptr, nullptr);
9702 : pScaledProgress =
9703 41 : GDALCreateScaledProgress(0.1, 0.25, pfnProgress, pProgressData);
9704 41 : poDS->AddProjectionVars(false, GDALScaledProgress, pScaledProgress);
9705 41 : GDALDestroyScaledProgress(pScaledProgress);
9706 : }
9707 : else
9708 : {
9709 17 : poDS->bBottomUp =
9710 17 : CPL_TO_BOOL(CSLFetchBoolean(papszOptions, "WRITE_BOTTOMUP", TRUE));
9711 17 : if (papszGeolocationInfo)
9712 : {
9713 4 : poDS->AddProjectionVars(true, nullptr, nullptr);
9714 4 : poDS->AddProjectionVars(false, nullptr, nullptr);
9715 : }
9716 : }
9717 :
9718 : // Save X,Y dim positions.
9719 58 : panDimIds[nDim - 1] = poDS->nXDimID;
9720 58 : panBandDimPos[0] = nDim - 1;
9721 58 : panDimIds[nDim - 2] = poDS->nYDimID;
9722 58 : panBandDimPos[1] = nDim - 2;
9723 :
9724 : // Write extra dim values - after projection for optimization.
9725 58 : if (nDim > 2)
9726 : {
9727 : // Make sure we are in data mode.
9728 5 : static_cast<netCDFDataset *>(poDS)->SetDefineMode(false);
9729 13 : for (int i = CSLCount(papszExtraDimNames) - 1; i >= 0; i--)
9730 : {
9731 : char szTemp[NC_MAX_NAME + 32 + 1];
9732 8 : snprintf(szTemp, sizeof(szTemp), "NETCDF_DIM_%s_VALUES",
9733 8 : papszExtraDimNames[i]);
9734 8 : if (poSrcDS->GetMetadataItem(szTemp) != nullptr)
9735 : {
9736 8 : NCDFPut1DVar(poDS->cdfid, panDimVarIds[i],
9737 8 : poSrcDS->GetMetadataItem(szTemp));
9738 : }
9739 : }
9740 : }
9741 :
9742 58 : pfnProgress(0.25, nullptr, pProgressData);
9743 :
9744 : // Define Bands.
9745 58 : netCDFRasterBand *poBand = nullptr;
9746 58 : int nBandID = -1;
9747 :
9748 149 : for (int iBand = 1; iBand <= nBands; iBand++)
9749 : {
9750 91 : CPLDebug("GDAL_netCDF", "creating band # %d/%d nDim = %d", iBand,
9751 : nBands, nDim);
9752 :
9753 91 : poSrcBand = poSrcDS->GetRasterBand(iBand);
9754 91 : eDT = poSrcBand->GetRasterDataType();
9755 :
9756 : // Get var name from NETCDF_VARNAME.
9757 : const char *pszNETCDF_VARNAME =
9758 91 : poSrcBand->GetMetadataItem("NETCDF_VARNAME");
9759 : char szBandName[NC_MAX_NAME + 1];
9760 91 : if (!aosBandNames.empty())
9761 : {
9762 2 : snprintf(szBandName, sizeof(szBandName), "%s",
9763 : aosBandNames[iBand - 1]);
9764 : }
9765 89 : else if (pszNETCDF_VARNAME)
9766 : {
9767 32 : if (nBands > 1 && papszExtraDimNames == nullptr)
9768 0 : snprintf(szBandName, sizeof(szBandName), "%s%d",
9769 : pszNETCDF_VARNAME, iBand);
9770 : else
9771 32 : snprintf(szBandName, sizeof(szBandName), "%s",
9772 : pszNETCDF_VARNAME);
9773 : }
9774 : else
9775 : {
9776 57 : szBandName[0] = '\0';
9777 : }
9778 :
9779 : // Get long_name from <var>#long_name.
9780 91 : const char *pszLongName = "";
9781 91 : if (pszNETCDF_VARNAME)
9782 : {
9783 : pszLongName =
9784 64 : poSrcDS->GetMetadataItem(std::string(pszNETCDF_VARNAME)
9785 32 : .append("#")
9786 32 : .append(CF_LNG_NAME)
9787 32 : .c_str());
9788 32 : if (!pszLongName)
9789 25 : pszLongName = "";
9790 : }
9791 :
9792 91 : constexpr bool bSignedData = false;
9793 :
9794 91 : if (nDim > 2)
9795 27 : poBand = new netCDFRasterBand(
9796 27 : netCDFRasterBand::CONSTRUCTOR_CREATE(), poDS, eDT, iBand,
9797 : bSignedData, szBandName, pszLongName, nBandID, nDim, iBand - 1,
9798 27 : panBandZLev, panBandDimPos, panDimIds);
9799 : else
9800 64 : poBand = new netCDFRasterBand(
9801 64 : netCDFRasterBand::CONSTRUCTOR_CREATE(), poDS, eDT, iBand,
9802 64 : bSignedData, szBandName, pszLongName);
9803 :
9804 91 : poDS->SetBand(iBand, poBand);
9805 :
9806 : // Set nodata value, if any.
9807 91 : GDALCopyNoDataValue(poBand, poSrcBand);
9808 :
9809 : // Copy Metadata for band.
9810 91 : CopyMetadata(nullptr, poSrcDS->GetRasterBand(iBand), poBand,
9811 : poDS->cdfid, poBand->nZId);
9812 :
9813 : // If more than 2D pass the first band's netcdf var ID to subsequent
9814 : // bands.
9815 91 : if (nDim > 2)
9816 27 : nBandID = poBand->nZId;
9817 : }
9818 :
9819 : // Write projection variable to band variable.
9820 58 : poDS->AddGridMappingRef();
9821 :
9822 58 : pfnProgress(0.5, nullptr, pProgressData);
9823 :
9824 : // Write bands.
9825 :
9826 : // Make sure we are in data mode.
9827 58 : poDS->SetDefineMode(false);
9828 :
9829 58 : double dfTemp = 0.5;
9830 :
9831 58 : eErr = CE_None;
9832 :
9833 149 : for (int iBand = 1; iBand <= nBands && eErr == CE_None; iBand++)
9834 : {
9835 91 : const double dfTemp2 = dfTemp + 0.4 / nBands;
9836 91 : pScaledProgress = GDALCreateScaledProgress(dfTemp, dfTemp2, pfnProgress,
9837 : pProgressData);
9838 91 : dfTemp = dfTemp2;
9839 :
9840 91 : CPLDebug("GDAL_netCDF", "copying band data # %d/%d ", iBand, nBands);
9841 :
9842 91 : poSrcBand = poSrcDS->GetRasterBand(iBand);
9843 91 : eDT = poSrcBand->GetRasterDataType();
9844 :
9845 91 : GDALRasterBand *poDstBand = poDS->GetRasterBand(iBand);
9846 :
9847 : // Copy band data.
9848 91 : if (eDT == GDT_Byte)
9849 : {
9850 51 : CPLDebug("GDAL_netCDF", "GByte Band#%d", iBand);
9851 51 : eErr = NCDFCopyBand<GByte>(poSrcBand, poDstBand, nXSize, nYSize,
9852 : GDALScaledProgress, pScaledProgress);
9853 : }
9854 40 : else if (eDT == GDT_Int8)
9855 : {
9856 1 : CPLDebug("GDAL_netCDF", "GInt8 Band#%d", iBand);
9857 1 : eErr = NCDFCopyBand<GInt8>(poSrcBand, poDstBand, nXSize, nYSize,
9858 : GDALScaledProgress, pScaledProgress);
9859 : }
9860 39 : else if (eDT == GDT_UInt16)
9861 : {
9862 2 : CPLDebug("GDAL_netCDF", "GUInt16 Band#%d", iBand);
9863 2 : eErr = NCDFCopyBand<GInt16>(poSrcBand, poDstBand, nXSize, nYSize,
9864 : GDALScaledProgress, pScaledProgress);
9865 : }
9866 37 : else if (eDT == GDT_Int16)
9867 : {
9868 5 : CPLDebug("GDAL_netCDF", "GInt16 Band#%d", iBand);
9869 5 : eErr = NCDFCopyBand<GUInt16>(poSrcBand, poDstBand, nXSize, nYSize,
9870 : GDALScaledProgress, pScaledProgress);
9871 : }
9872 32 : else if (eDT == GDT_UInt32)
9873 : {
9874 2 : CPLDebug("GDAL_netCDF", "GUInt32 Band#%d", iBand);
9875 2 : eErr = NCDFCopyBand<GUInt32>(poSrcBand, poDstBand, nXSize, nYSize,
9876 : GDALScaledProgress, pScaledProgress);
9877 : }
9878 30 : else if (eDT == GDT_Int32)
9879 : {
9880 18 : CPLDebug("GDAL_netCDF", "GInt32 Band#%d", iBand);
9881 18 : eErr = NCDFCopyBand<GInt32>(poSrcBand, poDstBand, nXSize, nYSize,
9882 : GDALScaledProgress, pScaledProgress);
9883 : }
9884 12 : else if (eDT == GDT_UInt64)
9885 : {
9886 2 : CPLDebug("GDAL_netCDF", "GUInt64 Band#%d", iBand);
9887 2 : eErr = NCDFCopyBand<std::uint64_t>(poSrcBand, poDstBand, nXSize,
9888 : nYSize, GDALScaledProgress,
9889 : pScaledProgress);
9890 : }
9891 10 : else if (eDT == GDT_Int64)
9892 : {
9893 2 : CPLDebug("GDAL_netCDF", "GInt64 Band#%d", iBand);
9894 : eErr =
9895 2 : NCDFCopyBand<std::int64_t>(poSrcBand, poDstBand, nXSize, nYSize,
9896 : GDALScaledProgress, pScaledProgress);
9897 : }
9898 8 : else if (eDT == GDT_Float32)
9899 : {
9900 6 : CPLDebug("GDAL_netCDF", "float Band#%d", iBand);
9901 6 : eErr = NCDFCopyBand<float>(poSrcBand, poDstBand, nXSize, nYSize,
9902 : GDALScaledProgress, pScaledProgress);
9903 : }
9904 2 : else if (eDT == GDT_Float64)
9905 : {
9906 2 : CPLDebug("GDAL_netCDF", "double Band#%d", iBand);
9907 2 : eErr = NCDFCopyBand<double>(poSrcBand, poDstBand, nXSize, nYSize,
9908 : GDALScaledProgress, pScaledProgress);
9909 : }
9910 : else
9911 : {
9912 0 : CPLError(CE_Failure, CPLE_NotSupported,
9913 : "The NetCDF driver does not support GDAL data type %d",
9914 : eDT);
9915 : }
9916 :
9917 91 : GDALDestroyScaledProgress(pScaledProgress);
9918 : }
9919 :
9920 58 : delete (poDS);
9921 :
9922 58 : CPLFree(panDimIds);
9923 58 : CPLFree(panBandDimPos);
9924 58 : CPLFree(panBandZLev);
9925 58 : CPLFree(panDimVarIds);
9926 58 : if (papszExtraDimNames)
9927 5 : CSLDestroy(papszExtraDimNames);
9928 :
9929 58 : if (eErr != CE_None)
9930 0 : return nullptr;
9931 :
9932 58 : pfnProgress(0.95, nullptr, pProgressData);
9933 :
9934 : // Re-open dataset so we can return it.
9935 116 : CPLStringList aosOpenOptions;
9936 58 : aosOpenOptions.AddString("VARIABLES_AS_BANDS=YES");
9937 58 : GDALOpenInfo oOpenInfo(pszFilename, GA_Update);
9938 58 : oOpenInfo.nOpenFlags = GDAL_OF_RASTER | GDAL_OF_UPDATE;
9939 58 : oOpenInfo.papszOpenOptions = aosOpenOptions.List();
9940 58 : auto poRetDS = Open(&oOpenInfo);
9941 :
9942 : // PAM cloning is disabled. See bug #4244.
9943 : // if( poDS )
9944 : // poDS->CloneInfo(poSrcDS, GCIF_PAM_DEFAULT);
9945 :
9946 58 : pfnProgress(1.0, nullptr, pProgressData);
9947 :
9948 58 : return poRetDS;
9949 : }
9950 :
9951 : // Note: some logic depends on bIsProjected and bIsGeoGraphic.
9952 : // May not be known when Create() is called, see AddProjectionVars().
9953 254 : void netCDFDataset::ProcessCreationOptions()
9954 : {
9955 : const char *pszConfig =
9956 254 : CSLFetchNameValue(papszCreationOptions, "CONFIG_FILE");
9957 254 : if (pszConfig != nullptr)
9958 : {
9959 4 : if (oWriterConfig.Parse(pszConfig))
9960 : {
9961 : // Override dataset creation options from the config file
9962 2 : std::map<CPLString, CPLString>::iterator oIter;
9963 3 : for (oIter = oWriterConfig.m_oDatasetCreationOptions.begin();
9964 3 : oIter != oWriterConfig.m_oDatasetCreationOptions.end();
9965 1 : ++oIter)
9966 : {
9967 2 : papszCreationOptions = CSLSetNameValue(
9968 2 : papszCreationOptions, oIter->first, oIter->second);
9969 : }
9970 : }
9971 : }
9972 :
9973 : // File format.
9974 254 : eFormat = NCDF_FORMAT_NC;
9975 254 : const char *pszValue = CSLFetchNameValue(papszCreationOptions, "FORMAT");
9976 254 : if (pszValue != nullptr)
9977 : {
9978 93 : if (EQUAL(pszValue, "NC"))
9979 : {
9980 3 : eFormat = NCDF_FORMAT_NC;
9981 : }
9982 : #ifdef NETCDF_HAS_NC2
9983 90 : else if (EQUAL(pszValue, "NC2"))
9984 : {
9985 1 : eFormat = NCDF_FORMAT_NC2;
9986 : }
9987 : #endif
9988 89 : else if (EQUAL(pszValue, "NC4"))
9989 : {
9990 85 : eFormat = NCDF_FORMAT_NC4;
9991 : }
9992 4 : else if (EQUAL(pszValue, "NC4C"))
9993 : {
9994 4 : eFormat = NCDF_FORMAT_NC4C;
9995 : }
9996 : else
9997 : {
9998 0 : CPLError(CE_Failure, CPLE_NotSupported,
9999 : "FORMAT=%s in not supported, using the default NC format.",
10000 : pszValue);
10001 : }
10002 : }
10003 :
10004 : // COMPRESS option.
10005 254 : pszValue = CSLFetchNameValue(papszCreationOptions, "COMPRESS");
10006 254 : if (pszValue != nullptr)
10007 : {
10008 3 : if (EQUAL(pszValue, "NONE"))
10009 : {
10010 1 : eCompress = NCDF_COMPRESS_NONE;
10011 : }
10012 2 : else if (EQUAL(pszValue, "DEFLATE"))
10013 : {
10014 2 : eCompress = NCDF_COMPRESS_DEFLATE;
10015 2 : if (!((eFormat == NCDF_FORMAT_NC4) ||
10016 2 : (eFormat == NCDF_FORMAT_NC4C)))
10017 : {
10018 1 : CPLError(CE_Warning, CPLE_IllegalArg,
10019 : "NOTICE: Format set to NC4C because compression is "
10020 : "set to DEFLATE.");
10021 1 : eFormat = NCDF_FORMAT_NC4C;
10022 : }
10023 : }
10024 : else
10025 : {
10026 0 : CPLError(CE_Failure, CPLE_NotSupported,
10027 : "COMPRESS=%s is not supported.", pszValue);
10028 : }
10029 : }
10030 :
10031 : // ZLEVEL option.
10032 254 : pszValue = CSLFetchNameValue(papszCreationOptions, "ZLEVEL");
10033 254 : if (pszValue != nullptr)
10034 : {
10035 1 : nZLevel = atoi(pszValue);
10036 1 : if (!(nZLevel >= 1 && nZLevel <= 9))
10037 : {
10038 0 : CPLError(CE_Warning, CPLE_IllegalArg,
10039 : "ZLEVEL=%s value not recognised, ignoring.", pszValue);
10040 0 : nZLevel = NCDF_DEFLATE_LEVEL;
10041 : }
10042 : }
10043 :
10044 : // CHUNKING option.
10045 254 : bChunking =
10046 254 : CPL_TO_BOOL(CSLFetchBoolean(papszCreationOptions, "CHUNKING", TRUE));
10047 :
10048 : // MULTIPLE_LAYERS option.
10049 : const char *pszMultipleLayerBehavior =
10050 254 : CSLFetchNameValueDef(papszCreationOptions, "MULTIPLE_LAYERS", "NO");
10051 508 : const char *pszGeometryEnc = CSLFetchNameValueDef(
10052 254 : papszCreationOptions, "GEOMETRY_ENCODING", "CF_1.8");
10053 254 : if (EQUAL(pszMultipleLayerBehavior, "NO") ||
10054 3 : EQUAL(pszGeometryEnc, "CF_1.8"))
10055 : {
10056 251 : eMultipleLayerBehavior = SINGLE_LAYER;
10057 : }
10058 3 : else if (EQUAL(pszMultipleLayerBehavior, "SEPARATE_FILES"))
10059 : {
10060 2 : eMultipleLayerBehavior = SEPARATE_FILES;
10061 : }
10062 1 : else if (EQUAL(pszMultipleLayerBehavior, "SEPARATE_GROUPS"))
10063 : {
10064 1 : if (eFormat == NCDF_FORMAT_NC4)
10065 : {
10066 1 : eMultipleLayerBehavior = SEPARATE_GROUPS;
10067 : }
10068 : else
10069 : {
10070 0 : CPLError(CE_Warning, CPLE_IllegalArg,
10071 : "MULTIPLE_LAYERS=%s is recognised only with FORMAT=NC4",
10072 : pszMultipleLayerBehavior);
10073 : }
10074 : }
10075 : else
10076 : {
10077 0 : CPLError(CE_Warning, CPLE_IllegalArg,
10078 : "MULTIPLE_LAYERS=%s not recognised", pszMultipleLayerBehavior);
10079 : }
10080 :
10081 : // Set nCreateMode based on eFormat.
10082 254 : switch (eFormat)
10083 : {
10084 : #ifdef NETCDF_HAS_NC2
10085 1 : case NCDF_FORMAT_NC2:
10086 1 : nCreateMode = NC_CLOBBER | NC_64BIT_OFFSET;
10087 1 : break;
10088 : #endif
10089 85 : case NCDF_FORMAT_NC4:
10090 85 : nCreateMode = NC_CLOBBER | NC_NETCDF4;
10091 85 : break;
10092 5 : case NCDF_FORMAT_NC4C:
10093 5 : nCreateMode = NC_CLOBBER | NC_NETCDF4 | NC_CLASSIC_MODEL;
10094 5 : break;
10095 163 : case NCDF_FORMAT_NC:
10096 : default:
10097 163 : nCreateMode = NC_CLOBBER;
10098 163 : break;
10099 : }
10100 :
10101 254 : CPLDebug("GDAL_netCDF", "file options: format=%d compress=%d zlevel=%d",
10102 254 : eFormat, eCompress, nZLevel);
10103 254 : }
10104 :
10105 278 : int netCDFDataset::DefVarDeflate(int nVarId, bool bChunkingArg)
10106 : {
10107 278 : if (eCompress == NCDF_COMPRESS_DEFLATE)
10108 : {
10109 : // Must set chunk size to avoid huge performance hit (set
10110 : // bChunkingArg=TRUE)
10111 : // perhaps another solution it to change the chunk cache?
10112 : // http://www.unidata.ucar.edu/software/netcdf/docs/netcdf.html#Chunk-Cache
10113 : // TODO: make sure this is okay.
10114 2 : CPLDebug("GDAL_netCDF", "DefVarDeflate(%d, %d) nZlevel=%d", nVarId,
10115 : static_cast<int>(bChunkingArg), nZLevel);
10116 :
10117 2 : int status = nc_def_var_deflate(cdfid, nVarId, 1, 1, nZLevel);
10118 2 : NCDF_ERR(status);
10119 :
10120 2 : if (status == NC_NOERR && bChunkingArg && bChunking)
10121 : {
10122 : // set chunking to be 1 for all dims, except X dim
10123 : // size_t chunksize[] = { 1, (size_t)nRasterXSize };
10124 : size_t chunksize[MAX_NC_DIMS];
10125 : int nd;
10126 2 : nc_inq_varndims(cdfid, nVarId, &nd);
10127 2 : chunksize[0] = (size_t)1;
10128 2 : chunksize[1] = (size_t)1;
10129 2 : for (int i = 2; i < nd; i++)
10130 0 : chunksize[i] = (size_t)1;
10131 2 : chunksize[nd - 1] = (size_t)nRasterXSize;
10132 :
10133 : // Config options just for testing purposes
10134 : const char *pszBlockXSize =
10135 2 : CPLGetConfigOption("BLOCKXSIZE", nullptr);
10136 2 : if (pszBlockXSize)
10137 0 : chunksize[nd - 1] = (size_t)atoi(pszBlockXSize);
10138 :
10139 : const char *pszBlockYSize =
10140 2 : CPLGetConfigOption("BLOCKYSIZE", nullptr);
10141 2 : if (nd >= 2 && pszBlockYSize)
10142 0 : chunksize[nd - 2] = (size_t)atoi(pszBlockYSize);
10143 :
10144 2 : CPLDebug("GDAL_netCDF",
10145 : "DefVarDeflate() chunksize={%ld, %ld} chunkX=%ld nd=%d",
10146 2 : (long)chunksize[0], (long)chunksize[1],
10147 2 : (long)chunksize[nd - 1], nd);
10148 : #ifdef NCDF_DEBUG
10149 : for (int i = 0; i < nd; i++)
10150 : CPLDebug("GDAL_netCDF", "DefVarDeflate() chunk[%d]=%ld", i,
10151 : chunksize[i]);
10152 : #endif
10153 :
10154 2 : status = nc_def_var_chunking(cdfid, nVarId, NC_CHUNKED, chunksize);
10155 2 : NCDF_ERR(status);
10156 : }
10157 : else
10158 : {
10159 0 : CPLDebug("GDAL_netCDF", "chunksize not set");
10160 : }
10161 2 : return status;
10162 : }
10163 276 : return NC_NOERR;
10164 : }
10165 :
10166 : /************************************************************************/
10167 : /* NCDFUnloadDriver() */
10168 : /************************************************************************/
10169 :
10170 8 : static void NCDFUnloadDriver(CPL_UNUSED GDALDriver *poDriver)
10171 : {
10172 8 : if (hNCMutex != nullptr)
10173 4 : CPLDestroyMutex(hNCMutex);
10174 8 : hNCMutex = nullptr;
10175 8 : }
10176 :
10177 : /************************************************************************/
10178 : /* GDALRegister_netCDF() */
10179 : /************************************************************************/
10180 :
10181 : class GDALnetCDFDriver final : public GDALDriver
10182 : {
10183 : public:
10184 18 : GDALnetCDFDriver() = default;
10185 :
10186 : const char *GetMetadataItem(const char *pszName,
10187 : const char *pszDomain) override;
10188 :
10189 89 : char **GetMetadata(const char *pszDomain) override
10190 : {
10191 178 : std::lock_guard oLock(m_oMutex);
10192 89 : InitializeDCAPVirtualIO();
10193 178 : return GDALDriver::GetMetadata(pszDomain);
10194 : }
10195 :
10196 : private:
10197 : std::mutex m_oMutex{};
10198 : bool m_bInitialized = false;
10199 :
10200 102 : void InitializeDCAPVirtualIO()
10201 : {
10202 102 : if (!m_bInitialized)
10203 : {
10204 12 : m_bInitialized = true;
10205 :
10206 : #ifdef ENABLE_UFFD
10207 12 : if (CPLIsUserFaultMappingSupported())
10208 : {
10209 12 : SetMetadataItem(GDAL_DCAP_VIRTUALIO, "YES");
10210 : }
10211 : #endif
10212 : }
10213 102 : }
10214 : };
10215 :
10216 1339 : const char *GDALnetCDFDriver::GetMetadataItem(const char *pszName,
10217 : const char *pszDomain)
10218 : {
10219 2678 : std::lock_guard oLock(m_oMutex);
10220 1339 : if (EQUAL(pszName, GDAL_DCAP_VIRTUALIO))
10221 : {
10222 13 : InitializeDCAPVirtualIO();
10223 : }
10224 2678 : return GDALDriver::GetMetadataItem(pszName, pszDomain);
10225 : }
10226 :
10227 18 : void GDALRegister_netCDF()
10228 :
10229 : {
10230 18 : if (!GDAL_CHECK_VERSION("netCDF driver"))
10231 0 : return;
10232 :
10233 18 : if (GDALGetDriverByName(DRIVER_NAME) != nullptr)
10234 0 : return;
10235 :
10236 18 : GDALDriver *poDriver = new GDALnetCDFDriver();
10237 18 : netCDFDriverSetCommonMetadata(poDriver);
10238 :
10239 18 : poDriver->SetMetadataItem("NETCDF_CONVENTIONS",
10240 18 : GDAL_DEFAULT_NCDF_CONVENTIONS);
10241 18 : poDriver->SetMetadataItem("NETCDF_VERSION", nc_inq_libvers());
10242 :
10243 : // Set pfns and register driver.
10244 18 : poDriver->pfnOpen = netCDFDataset::Open;
10245 18 : poDriver->pfnCreateCopy = netCDFDataset::CreateCopy;
10246 18 : poDriver->pfnCreate = netCDFDataset::Create;
10247 18 : poDriver->pfnCreateMultiDimensional = netCDFDataset::CreateMultiDimensional;
10248 18 : poDriver->pfnUnloadDriver = NCDFUnloadDriver;
10249 :
10250 18 : GetGDALDriverManager()->RegisterDriver(poDriver);
10251 : }
10252 :
10253 : /************************************************************************/
10254 : /* New functions */
10255 : /************************************************************************/
10256 :
10257 : /* Test for GDAL version string >= target */
10258 241 : static bool NCDFIsGDALVersionGTE(const char *pszVersion, int nTarget)
10259 : {
10260 :
10261 : // Valid strings are "GDAL 1.9dev, released 2011/01/18" and "GDAL 1.8.1 ".
10262 241 : if (pszVersion == nullptr || EQUAL(pszVersion, ""))
10263 0 : return false;
10264 241 : else if (!STARTS_WITH_CI(pszVersion, "GDAL "))
10265 0 : return false;
10266 : // 2.0dev of 2011/12/29 has been later renamed as 1.10dev.
10267 241 : else if (EQUAL("GDAL 2.0dev, released 2011/12/29", pszVersion))
10268 0 : return nTarget <= GDAL_COMPUTE_VERSION(1, 10, 0);
10269 241 : else if (STARTS_WITH_CI(pszVersion, "GDAL 1.9dev"))
10270 2 : return nTarget <= 1900;
10271 239 : else if (STARTS_WITH_CI(pszVersion, "GDAL 1.8dev"))
10272 0 : return nTarget <= 1800;
10273 :
10274 239 : char **papszTokens = CSLTokenizeString2(pszVersion + 5, ".", 0);
10275 :
10276 239 : int nVersions[] = {0, 0, 0, 0};
10277 956 : for (int iToken = 0; papszTokens && iToken < 4 && papszTokens[iToken];
10278 : iToken++)
10279 : {
10280 717 : nVersions[iToken] = atoi(papszTokens[iToken]);
10281 717 : if (nVersions[iToken] < 0)
10282 0 : nVersions[iToken] = 0;
10283 717 : else if (nVersions[iToken] > 99)
10284 0 : nVersions[iToken] = 99;
10285 : }
10286 :
10287 239 : int nVersion = 0;
10288 239 : if (nVersions[0] > 1 || nVersions[1] >= 10)
10289 239 : nVersion =
10290 239 : GDAL_COMPUTE_VERSION(nVersions[0], nVersions[1], nVersions[2]);
10291 : else
10292 0 : nVersion = nVersions[0] * 1000 + nVersions[1] * 100 +
10293 0 : nVersions[2] * 10 + nVersions[3];
10294 :
10295 239 : CSLDestroy(papszTokens);
10296 239 : return nTarget <= nVersion;
10297 : }
10298 :
10299 : // Add Conventions, GDAL version and history.
10300 167 : static void NCDFAddGDALHistory(int fpImage, const char *pszFilename,
10301 : bool bWriteGDALVersion, bool bWriteGDALHistory,
10302 : const char *pszOldHist,
10303 : const char *pszFunctionName,
10304 : const char *pszCFVersion)
10305 : {
10306 167 : if (pszCFVersion == nullptr)
10307 : {
10308 42 : pszCFVersion = GDAL_DEFAULT_NCDF_CONVENTIONS;
10309 : }
10310 167 : int status = nc_put_att_text(fpImage, NC_GLOBAL, "Conventions",
10311 : strlen(pszCFVersion), pszCFVersion);
10312 167 : NCDF_ERR(status);
10313 :
10314 167 : if (bWriteGDALVersion)
10315 : {
10316 165 : const char *pszNCDF_GDAL = GDALVersionInfo("--version");
10317 165 : status = nc_put_att_text(fpImage, NC_GLOBAL, "GDAL",
10318 : strlen(pszNCDF_GDAL), pszNCDF_GDAL);
10319 165 : NCDF_ERR(status);
10320 : }
10321 :
10322 167 : if (bWriteGDALHistory)
10323 : {
10324 : // Add history.
10325 330 : CPLString osTmp;
10326 : #ifdef GDAL_SET_CMD_LINE_DEFINED_TMP
10327 : if (!EQUAL(GDALGetCmdLine(), ""))
10328 : osTmp = GDALGetCmdLine();
10329 : else
10330 : osTmp =
10331 : CPLSPrintf("GDAL %s( %s, ... )", pszFunctionName, pszFilename);
10332 : #else
10333 165 : osTmp = CPLSPrintf("GDAL %s( %s, ... )", pszFunctionName, pszFilename);
10334 : #endif
10335 :
10336 165 : NCDFAddHistory(fpImage, osTmp.c_str(), pszOldHist);
10337 : }
10338 2 : else if (pszOldHist != nullptr)
10339 : {
10340 0 : status = nc_put_att_text(fpImage, NC_GLOBAL, "history",
10341 : strlen(pszOldHist), pszOldHist);
10342 0 : NCDF_ERR(status);
10343 : }
10344 167 : }
10345 :
10346 : // Code taken from cdo and libcdi, used for writing the history attribute.
10347 :
10348 : // void cdoDefHistory(int fileID, char *histstring)
10349 165 : static void NCDFAddHistory(int fpImage, const char *pszAddHist,
10350 : const char *pszOldHist)
10351 : {
10352 : // Check pszOldHist - as if there was no previous history, it will be
10353 : // a null pointer - if so set as empty.
10354 165 : if (nullptr == pszOldHist)
10355 : {
10356 53 : pszOldHist = "";
10357 : }
10358 :
10359 : char strtime[32];
10360 165 : strtime[0] = '\0';
10361 :
10362 165 : time_t tp = time(nullptr);
10363 165 : if (tp != -1)
10364 : {
10365 : struct tm ltime;
10366 165 : VSILocalTime(&tp, <ime);
10367 165 : (void)strftime(strtime, sizeof(strtime),
10368 : "%a %b %d %H:%M:%S %Y: ", <ime);
10369 : }
10370 :
10371 : // status = nc_get_att_text(fpImage, NC_GLOBAL,
10372 : // "history", pszOldHist);
10373 : // printf("status: %d pszOldHist: [%s]\n",status,pszOldHist);
10374 :
10375 165 : size_t nNewHistSize =
10376 165 : strlen(pszOldHist) + strlen(strtime) + strlen(pszAddHist) + 1 + 1;
10377 : char *pszNewHist =
10378 165 : static_cast<char *>(CPLMalloc(nNewHistSize * sizeof(char)));
10379 :
10380 165 : strcpy(pszNewHist, strtime);
10381 165 : strcat(pszNewHist, pszAddHist);
10382 :
10383 : // int disableHistory = FALSE;
10384 : // if( !disableHistory )
10385 : {
10386 165 : if (!EQUAL(pszOldHist, ""))
10387 3 : strcat(pszNewHist, "\n");
10388 165 : strcat(pszNewHist, pszOldHist);
10389 : }
10390 :
10391 165 : const int status = nc_put_att_text(fpImage, NC_GLOBAL, "history",
10392 : strlen(pszNewHist), pszNewHist);
10393 165 : NCDF_ERR(status);
10394 :
10395 165 : CPLFree(pszNewHist);
10396 165 : }
10397 :
10398 6133 : static CPLErr NCDFSafeStrcat(char **ppszDest, const char *pszSrc,
10399 : size_t *nDestSize)
10400 : {
10401 : /* Reallocate the data string until the content fits */
10402 6133 : while (*nDestSize < (strlen(*ppszDest) + strlen(pszSrc) + 1))
10403 : {
10404 408 : (*nDestSize) *= 2;
10405 408 : *ppszDest = static_cast<char *>(
10406 408 : CPLRealloc(reinterpret_cast<void *>(*ppszDest), *nDestSize));
10407 : #ifdef NCDF_DEBUG
10408 : CPLDebug("GDAL_netCDF", "NCDFSafeStrcat() resized str from %ld to %ld",
10409 : (*nDestSize) / 2, *nDestSize);
10410 : #endif
10411 : }
10412 5725 : strcat(*ppszDest, pszSrc);
10413 :
10414 5725 : return CE_None;
10415 : }
10416 :
10417 : /* helper function for NCDFGetAttr() */
10418 : /* if pdfValue != nullptr, sets *pdfValue to first value returned */
10419 : /* if ppszValue != nullptr, sets *ppszValue with all attribute values */
10420 : /* *ppszValue is the responsibility of the caller and must be freed */
10421 63223 : static CPLErr NCDFGetAttr1(int nCdfId, int nVarId, const char *pszAttrName,
10422 : double *pdfValue, char **ppszValue)
10423 : {
10424 63223 : nc_type nAttrType = NC_NAT;
10425 63223 : size_t nAttrLen = 0;
10426 :
10427 63223 : if (ppszValue)
10428 62076 : *ppszValue = nullptr;
10429 :
10430 63223 : int status = nc_inq_att(nCdfId, nVarId, pszAttrName, &nAttrType, &nAttrLen);
10431 63223 : if (status != NC_NOERR)
10432 33970 : return CE_Failure;
10433 :
10434 : #ifdef NCDF_DEBUG
10435 : CPLDebug("GDAL_netCDF", "NCDFGetAttr1(%s) len=%ld type=%d", pszAttrName,
10436 : nAttrLen, nAttrType);
10437 : #endif
10438 29253 : if (nAttrLen == 0 && nAttrType != NC_CHAR)
10439 1 : return CE_Failure;
10440 :
10441 : /* Allocate guaranteed minimum size (use 10 or 20 if not a string) */
10442 29252 : size_t nAttrValueSize = nAttrLen + 1;
10443 29252 : if (nAttrType != NC_CHAR && nAttrValueSize < 10)
10444 3210 : nAttrValueSize = 10;
10445 29252 : if (nAttrType == NC_DOUBLE && nAttrValueSize < 20)
10446 1562 : nAttrValueSize = 20;
10447 29252 : if (nAttrType == NC_INT64 && nAttrValueSize < 20)
10448 22 : nAttrValueSize = 22;
10449 : char *pszAttrValue =
10450 29252 : static_cast<char *>(CPLCalloc(nAttrValueSize, sizeof(char)));
10451 29252 : *pszAttrValue = '\0';
10452 :
10453 29252 : if (nAttrLen > 1 && nAttrType != NC_CHAR)
10454 596 : NCDFSafeStrcat(&pszAttrValue, "{", &nAttrValueSize);
10455 :
10456 29252 : double dfValue = 0.0;
10457 29252 : size_t m = 0;
10458 : char szTemp[256];
10459 29252 : bool bSetDoubleFromStr = false;
10460 :
10461 29252 : switch (nAttrType)
10462 : {
10463 26040 : case NC_CHAR:
10464 26040 : CPL_IGNORE_RET_VAL(
10465 26040 : nc_get_att_text(nCdfId, nVarId, pszAttrName, pszAttrValue));
10466 26040 : pszAttrValue[nAttrLen] = '\0';
10467 26040 : bSetDoubleFromStr = true;
10468 26040 : dfValue = 0.0;
10469 26040 : break;
10470 94 : case NC_BYTE:
10471 : {
10472 : signed char *pscTemp = static_cast<signed char *>(
10473 94 : CPLCalloc(nAttrLen, sizeof(signed char)));
10474 94 : nc_get_att_schar(nCdfId, nVarId, pszAttrName, pscTemp);
10475 94 : dfValue = static_cast<double>(pscTemp[0]);
10476 94 : if (nAttrLen > 1)
10477 : {
10478 24 : for (m = 0; m < nAttrLen - 1; m++)
10479 : {
10480 13 : snprintf(szTemp, sizeof(szTemp), "%d,", pscTemp[m]);
10481 13 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10482 : }
10483 : }
10484 94 : snprintf(szTemp, sizeof(szTemp), "%d", pscTemp[m]);
10485 94 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10486 94 : CPLFree(pscTemp);
10487 94 : break;
10488 : }
10489 483 : case NC_SHORT:
10490 : {
10491 : short *psTemp =
10492 483 : static_cast<short *>(CPLCalloc(nAttrLen, sizeof(short)));
10493 483 : nc_get_att_short(nCdfId, nVarId, pszAttrName, psTemp);
10494 483 : dfValue = static_cast<double>(psTemp[0]);
10495 483 : if (nAttrLen > 1)
10496 : {
10497 760 : for (m = 0; m < nAttrLen - 1; m++)
10498 : {
10499 380 : snprintf(szTemp, sizeof(szTemp), "%d,", psTemp[m]);
10500 380 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10501 : }
10502 : }
10503 483 : snprintf(szTemp, sizeof(szTemp), "%d", psTemp[m]);
10504 483 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10505 483 : CPLFree(psTemp);
10506 483 : break;
10507 : }
10508 528 : case NC_INT:
10509 : {
10510 528 : int *pnTemp = static_cast<int *>(CPLCalloc(nAttrLen, sizeof(int)));
10511 528 : nc_get_att_int(nCdfId, nVarId, pszAttrName, pnTemp);
10512 528 : dfValue = static_cast<double>(pnTemp[0]);
10513 528 : if (nAttrLen > 1)
10514 : {
10515 218 : for (m = 0; m < nAttrLen - 1; m++)
10516 : {
10517 139 : snprintf(szTemp, sizeof(szTemp), "%d,", pnTemp[m]);
10518 139 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10519 : }
10520 : }
10521 528 : snprintf(szTemp, sizeof(szTemp), "%d", pnTemp[m]);
10522 528 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10523 528 : CPLFree(pnTemp);
10524 528 : break;
10525 : }
10526 393 : case NC_FLOAT:
10527 : {
10528 : float *pfTemp =
10529 393 : static_cast<float *>(CPLCalloc(nAttrLen, sizeof(float)));
10530 393 : nc_get_att_float(nCdfId, nVarId, pszAttrName, pfTemp);
10531 393 : dfValue = static_cast<double>(pfTemp[0]);
10532 393 : if (nAttrLen > 1)
10533 : {
10534 56 : for (m = 0; m < nAttrLen - 1; m++)
10535 : {
10536 28 : CPLsnprintf(szTemp, sizeof(szTemp), "%.8g,", pfTemp[m]);
10537 28 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10538 : }
10539 : }
10540 393 : CPLsnprintf(szTemp, sizeof(szTemp), "%.8g", pfTemp[m]);
10541 393 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10542 393 : CPLFree(pfTemp);
10543 393 : break;
10544 : }
10545 1562 : case NC_DOUBLE:
10546 : {
10547 : double *pdfTemp =
10548 1562 : static_cast<double *>(CPLCalloc(nAttrLen, sizeof(double)));
10549 1562 : nc_get_att_double(nCdfId, nVarId, pszAttrName, pdfTemp);
10550 1562 : dfValue = pdfTemp[0];
10551 1562 : if (nAttrLen > 1)
10552 : {
10553 166 : for (m = 0; m < nAttrLen - 1; m++)
10554 : {
10555 90 : CPLsnprintf(szTemp, sizeof(szTemp), "%.16g,", pdfTemp[m]);
10556 90 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10557 : }
10558 : }
10559 1562 : CPLsnprintf(szTemp, sizeof(szTemp), "%.16g", pdfTemp[m]);
10560 1562 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10561 1562 : CPLFree(pdfTemp);
10562 1562 : break;
10563 : }
10564 10 : case NC_STRING:
10565 : {
10566 : char **ppszTemp =
10567 10 : static_cast<char **>(CPLCalloc(nAttrLen, sizeof(char *)));
10568 10 : nc_get_att_string(nCdfId, nVarId, pszAttrName, ppszTemp);
10569 10 : bSetDoubleFromStr = true;
10570 10 : dfValue = 0.0;
10571 10 : if (nAttrLen > 1)
10572 : {
10573 19 : for (m = 0; m < nAttrLen - 1; m++)
10574 : {
10575 12 : NCDFSafeStrcat(&pszAttrValue,
10576 12 : ppszTemp[m] ? ppszTemp[m] : "{NULL}",
10577 : &nAttrValueSize);
10578 12 : NCDFSafeStrcat(&pszAttrValue, ",", &nAttrValueSize);
10579 : }
10580 : }
10581 10 : NCDFSafeStrcat(&pszAttrValue, ppszTemp[m] ? ppszTemp[m] : "{NULL}",
10582 : &nAttrValueSize);
10583 10 : nc_free_string(nAttrLen, ppszTemp);
10584 10 : CPLFree(ppszTemp);
10585 10 : break;
10586 : }
10587 28 : case NC_UBYTE:
10588 : {
10589 : unsigned char *pucTemp = static_cast<unsigned char *>(
10590 28 : CPLCalloc(nAttrLen, sizeof(unsigned char)));
10591 28 : nc_get_att_uchar(nCdfId, nVarId, pszAttrName, pucTemp);
10592 28 : dfValue = static_cast<double>(pucTemp[0]);
10593 28 : if (nAttrLen > 1)
10594 : {
10595 0 : for (m = 0; m < nAttrLen - 1; m++)
10596 : {
10597 0 : CPLsnprintf(szTemp, sizeof(szTemp), "%u,", pucTemp[m]);
10598 0 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10599 : }
10600 : }
10601 28 : CPLsnprintf(szTemp, sizeof(szTemp), "%u", pucTemp[m]);
10602 28 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10603 28 : CPLFree(pucTemp);
10604 28 : break;
10605 : }
10606 26 : case NC_USHORT:
10607 : {
10608 : unsigned short *pusTemp;
10609 : pusTemp = static_cast<unsigned short *>(
10610 26 : CPLCalloc(nAttrLen, sizeof(unsigned short)));
10611 26 : nc_get_att_ushort(nCdfId, nVarId, pszAttrName, pusTemp);
10612 26 : dfValue = static_cast<double>(pusTemp[0]);
10613 26 : if (nAttrLen > 1)
10614 : {
10615 10 : for (m = 0; m < nAttrLen - 1; m++)
10616 : {
10617 5 : CPLsnprintf(szTemp, sizeof(szTemp), "%u,", pusTemp[m]);
10618 5 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10619 : }
10620 : }
10621 26 : CPLsnprintf(szTemp, sizeof(szTemp), "%u", pusTemp[m]);
10622 26 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10623 26 : CPLFree(pusTemp);
10624 26 : break;
10625 : }
10626 18 : case NC_UINT:
10627 : {
10628 : unsigned int *punTemp =
10629 18 : static_cast<unsigned int *>(CPLCalloc(nAttrLen, sizeof(int)));
10630 18 : nc_get_att_uint(nCdfId, nVarId, pszAttrName, punTemp);
10631 18 : dfValue = static_cast<double>(punTemp[0]);
10632 18 : if (nAttrLen > 1)
10633 : {
10634 0 : for (m = 0; m < nAttrLen - 1; m++)
10635 : {
10636 0 : CPLsnprintf(szTemp, sizeof(szTemp), "%u,", punTemp[m]);
10637 0 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10638 : }
10639 : }
10640 18 : CPLsnprintf(szTemp, sizeof(szTemp), "%u", punTemp[m]);
10641 18 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10642 18 : CPLFree(punTemp);
10643 18 : break;
10644 : }
10645 22 : case NC_INT64:
10646 : {
10647 : GIntBig *panTemp =
10648 22 : static_cast<GIntBig *>(CPLCalloc(nAttrLen, sizeof(GIntBig)));
10649 22 : nc_get_att_longlong(nCdfId, nVarId, pszAttrName, panTemp);
10650 22 : dfValue = static_cast<double>(panTemp[0]);
10651 22 : if (nAttrLen > 1)
10652 : {
10653 0 : for (m = 0; m < nAttrLen - 1; m++)
10654 : {
10655 0 : CPLsnprintf(szTemp, sizeof(szTemp), CPL_FRMT_GIB ",",
10656 0 : panTemp[m]);
10657 0 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10658 : }
10659 : }
10660 22 : CPLsnprintf(szTemp, sizeof(szTemp), CPL_FRMT_GIB, panTemp[m]);
10661 22 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10662 22 : CPLFree(panTemp);
10663 22 : break;
10664 : }
10665 22 : case NC_UINT64:
10666 : {
10667 : GUIntBig *panTemp =
10668 22 : static_cast<GUIntBig *>(CPLCalloc(nAttrLen, sizeof(GUIntBig)));
10669 22 : nc_get_att_ulonglong(nCdfId, nVarId, pszAttrName, panTemp);
10670 22 : dfValue = static_cast<double>(panTemp[0]);
10671 22 : if (nAttrLen > 1)
10672 : {
10673 0 : for (m = 0; m < nAttrLen - 1; m++)
10674 : {
10675 0 : CPLsnprintf(szTemp, sizeof(szTemp), CPL_FRMT_GUIB ",",
10676 0 : panTemp[m]);
10677 0 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10678 : }
10679 : }
10680 22 : CPLsnprintf(szTemp, sizeof(szTemp), CPL_FRMT_GUIB, panTemp[m]);
10681 22 : NCDFSafeStrcat(&pszAttrValue, szTemp, &nAttrValueSize);
10682 22 : CPLFree(panTemp);
10683 22 : break;
10684 : }
10685 26 : default:
10686 26 : CPLDebug("GDAL_netCDF",
10687 : "NCDFGetAttr unsupported type %d for attribute %s",
10688 : nAttrType, pszAttrName);
10689 26 : break;
10690 : }
10691 :
10692 29252 : if (nAttrLen > 1 && nAttrType != NC_CHAR)
10693 596 : NCDFSafeStrcat(&pszAttrValue, "}", &nAttrValueSize);
10694 :
10695 29252 : if (bSetDoubleFromStr)
10696 : {
10697 26050 : if (CPLGetValueType(pszAttrValue) == CPL_VALUE_STRING)
10698 : {
10699 25868 : if (ppszValue == nullptr && pdfValue != nullptr)
10700 : {
10701 1 : CPLFree(pszAttrValue);
10702 1 : return CE_Failure;
10703 : }
10704 : }
10705 26049 : dfValue = CPLAtof(pszAttrValue);
10706 : }
10707 :
10708 : /* set return values */
10709 29251 : if (ppszValue)
10710 28939 : *ppszValue = pszAttrValue;
10711 : else
10712 312 : CPLFree(pszAttrValue);
10713 :
10714 29251 : if (pdfValue)
10715 312 : *pdfValue = dfValue;
10716 :
10717 29251 : return CE_None;
10718 : }
10719 :
10720 : /* sets pdfValue to first value found */
10721 1147 : CPLErr NCDFGetAttr(int nCdfId, int nVarId, const char *pszAttrName,
10722 : double *pdfValue)
10723 : {
10724 1147 : return NCDFGetAttr1(nCdfId, nVarId, pszAttrName, pdfValue, nullptr);
10725 : }
10726 :
10727 : /* pszValue is the responsibility of the caller and must be freed */
10728 62076 : CPLErr NCDFGetAttr(int nCdfId, int nVarId, const char *pszAttrName,
10729 : char **pszValue)
10730 : {
10731 62076 : return NCDFGetAttr1(nCdfId, nVarId, pszAttrName, nullptr, pszValue);
10732 : }
10733 :
10734 : /* By default write NC_CHAR, but detect for int/float/double and */
10735 : /* NC4 string arrays */
10736 106 : static CPLErr NCDFPutAttr(int nCdfId, int nVarId, const char *pszAttrName,
10737 : const char *pszValue)
10738 : {
10739 106 : int status = 0;
10740 106 : char *pszTemp = nullptr;
10741 :
10742 : /* get the attribute values as tokens */
10743 106 : char **papszValues = NCDFTokenizeArray(pszValue);
10744 106 : if (papszValues == nullptr)
10745 0 : return CE_Failure;
10746 :
10747 106 : size_t nAttrLen = CSLCount(papszValues);
10748 :
10749 : /* first detect type */
10750 106 : nc_type nAttrType = NC_CHAR;
10751 106 : nc_type nTmpAttrType = NC_CHAR;
10752 225 : for (size_t i = 0; i < nAttrLen; i++)
10753 : {
10754 119 : nTmpAttrType = NC_CHAR;
10755 119 : bool bFoundType = false;
10756 119 : errno = 0;
10757 119 : int nValue = static_cast<int>(strtol(papszValues[i], &pszTemp, 10));
10758 : /* test for int */
10759 : /* TODO test for Byte and short - can this be done safely? */
10760 119 : if (errno == 0 && papszValues[i] != pszTemp && *pszTemp == 0)
10761 : {
10762 : char szTemp[256];
10763 19 : CPLsnprintf(szTemp, sizeof(szTemp), "%d", nValue);
10764 19 : if (EQUAL(szTemp, papszValues[i]))
10765 : {
10766 19 : bFoundType = true;
10767 19 : nTmpAttrType = NC_INT;
10768 : }
10769 : else
10770 : {
10771 : unsigned int unValue = static_cast<unsigned int>(
10772 0 : strtoul(papszValues[i], &pszTemp, 10));
10773 0 : CPLsnprintf(szTemp, sizeof(szTemp), "%u", unValue);
10774 0 : if (EQUAL(szTemp, papszValues[i]))
10775 : {
10776 0 : bFoundType = true;
10777 0 : nTmpAttrType = NC_UINT;
10778 : }
10779 : }
10780 : }
10781 119 : if (!bFoundType)
10782 : {
10783 : /* test for double */
10784 100 : errno = 0;
10785 100 : double dfValue = CPLStrtod(papszValues[i], &pszTemp);
10786 100 : if ((errno == 0) && (papszValues[i] != pszTemp) && (*pszTemp == 0))
10787 : {
10788 : // Test for float instead of double.
10789 : // strtof() is C89, which is not available in MSVC.
10790 : // See if we loose precision if we cast to float and write to
10791 : // char*.
10792 14 : float fValue = float(dfValue);
10793 : char szTemp[256];
10794 14 : CPLsnprintf(szTemp, sizeof(szTemp), "%.8g", fValue);
10795 14 : if (EQUAL(szTemp, papszValues[i]))
10796 8 : nTmpAttrType = NC_FLOAT;
10797 : else
10798 6 : nTmpAttrType = NC_DOUBLE;
10799 : }
10800 : }
10801 119 : if ((nTmpAttrType <= NC_DOUBLE && nAttrType <= NC_DOUBLE &&
10802 99 : nTmpAttrType > nAttrType) ||
10803 99 : (nTmpAttrType == NC_UINT && nAttrType < NC_FLOAT) ||
10804 5 : (nTmpAttrType >= NC_FLOAT && nAttrType == NC_UINT))
10805 20 : nAttrType = nTmpAttrType;
10806 : }
10807 :
10808 : #ifdef DEBUG
10809 106 : if (EQUAL(pszAttrName, "DEBUG_EMPTY_DOUBLE_ATTR"))
10810 : {
10811 0 : nAttrType = NC_DOUBLE;
10812 0 : nAttrLen = 0;
10813 : }
10814 : #endif
10815 :
10816 : /* now write the data */
10817 106 : if (nAttrType == NC_CHAR)
10818 : {
10819 86 : int nTmpFormat = 0;
10820 86 : if (nAttrLen > 1)
10821 : {
10822 0 : status = nc_inq_format(nCdfId, &nTmpFormat);
10823 0 : NCDF_ERR(status);
10824 : }
10825 86 : if (nAttrLen > 1 && nTmpFormat == NCDF_FORMAT_NC4)
10826 0 : status = nc_put_att_string(nCdfId, nVarId, pszAttrName, nAttrLen,
10827 : const_cast<const char **>(papszValues));
10828 : else
10829 86 : status = nc_put_att_text(nCdfId, nVarId, pszAttrName,
10830 : strlen(pszValue), pszValue);
10831 86 : NCDF_ERR(status);
10832 : }
10833 : else
10834 : {
10835 20 : switch (nAttrType)
10836 : {
10837 11 : case NC_INT:
10838 : {
10839 : int *pnTemp =
10840 11 : static_cast<int *>(CPLCalloc(nAttrLen, sizeof(int)));
10841 30 : for (size_t i = 0; i < nAttrLen; i++)
10842 : {
10843 19 : pnTemp[i] =
10844 19 : static_cast<int>(strtol(papszValues[i], &pszTemp, 10));
10845 : }
10846 11 : status = nc_put_att_int(nCdfId, nVarId, pszAttrName, NC_INT,
10847 : nAttrLen, pnTemp);
10848 11 : NCDF_ERR(status);
10849 11 : CPLFree(pnTemp);
10850 11 : break;
10851 : }
10852 0 : case NC_UINT:
10853 : {
10854 : unsigned int *punTemp = static_cast<unsigned int *>(
10855 0 : CPLCalloc(nAttrLen, sizeof(unsigned int)));
10856 0 : for (size_t i = 0; i < nAttrLen; i++)
10857 : {
10858 0 : punTemp[i] = static_cast<unsigned int>(
10859 0 : strtol(papszValues[i], &pszTemp, 10));
10860 : }
10861 0 : status = nc_put_att_uint(nCdfId, nVarId, pszAttrName, NC_UINT,
10862 : nAttrLen, punTemp);
10863 0 : NCDF_ERR(status);
10864 0 : CPLFree(punTemp);
10865 0 : break;
10866 : }
10867 6 : case NC_FLOAT:
10868 : {
10869 : float *pfTemp =
10870 6 : static_cast<float *>(CPLCalloc(nAttrLen, sizeof(float)));
10871 14 : for (size_t i = 0; i < nAttrLen; i++)
10872 : {
10873 8 : pfTemp[i] =
10874 8 : static_cast<float>(CPLStrtod(papszValues[i], &pszTemp));
10875 : }
10876 6 : status = nc_put_att_float(nCdfId, nVarId, pszAttrName, NC_FLOAT,
10877 : nAttrLen, pfTemp);
10878 6 : NCDF_ERR(status);
10879 6 : CPLFree(pfTemp);
10880 6 : break;
10881 : }
10882 3 : case NC_DOUBLE:
10883 : {
10884 : double *pdfTemp =
10885 3 : static_cast<double *>(CPLCalloc(nAttrLen, sizeof(double)));
10886 9 : for (size_t i = 0; i < nAttrLen; i++)
10887 : {
10888 6 : pdfTemp[i] = CPLStrtod(papszValues[i], &pszTemp);
10889 : }
10890 3 : status = nc_put_att_double(nCdfId, nVarId, pszAttrName,
10891 : NC_DOUBLE, nAttrLen, pdfTemp);
10892 3 : NCDF_ERR(status);
10893 3 : CPLFree(pdfTemp);
10894 3 : break;
10895 : }
10896 0 : default:
10897 0 : if (papszValues)
10898 0 : CSLDestroy(papszValues);
10899 0 : return CE_Failure;
10900 : break;
10901 : }
10902 : }
10903 :
10904 106 : if (papszValues)
10905 106 : CSLDestroy(papszValues);
10906 :
10907 106 : return CE_None;
10908 : }
10909 :
10910 76 : static CPLErr NCDFGet1DVar(int nCdfId, int nVarId, char **pszValue)
10911 : {
10912 : /* get var information */
10913 76 : int nVarDimId = -1;
10914 76 : int status = nc_inq_varndims(nCdfId, nVarId, &nVarDimId);
10915 76 : if (status != NC_NOERR || nVarDimId != 1)
10916 0 : return CE_Failure;
10917 :
10918 76 : status = nc_inq_vardimid(nCdfId, nVarId, &nVarDimId);
10919 76 : if (status != NC_NOERR)
10920 0 : return CE_Failure;
10921 :
10922 76 : nc_type nVarType = NC_NAT;
10923 76 : status = nc_inq_vartype(nCdfId, nVarId, &nVarType);
10924 76 : if (status != NC_NOERR)
10925 0 : return CE_Failure;
10926 :
10927 76 : size_t nVarLen = 0;
10928 76 : status = nc_inq_dimlen(nCdfId, nVarDimId, &nVarLen);
10929 76 : if (status != NC_NOERR)
10930 0 : return CE_Failure;
10931 :
10932 76 : size_t start[1] = {0};
10933 76 : size_t count[1] = {nVarLen};
10934 :
10935 : /* Allocate guaranteed minimum size */
10936 76 : size_t nVarValueSize = NCDF_MAX_STR_LEN;
10937 : char *pszVarValue =
10938 76 : static_cast<char *>(CPLCalloc(nVarValueSize, sizeof(char)));
10939 76 : *pszVarValue = '\0';
10940 :
10941 76 : if (nVarLen == 0)
10942 : {
10943 : /* set return values */
10944 1 : *pszValue = pszVarValue;
10945 :
10946 1 : return CE_None;
10947 : }
10948 :
10949 75 : if (nVarLen > 1 && nVarType != NC_CHAR)
10950 40 : NCDFSafeStrcat(&pszVarValue, "{", &nVarValueSize);
10951 :
10952 75 : switch (nVarType)
10953 : {
10954 0 : case NC_CHAR:
10955 0 : nc_get_vara_text(nCdfId, nVarId, start, count, pszVarValue);
10956 0 : pszVarValue[nVarLen] = '\0';
10957 0 : break;
10958 0 : case NC_BYTE:
10959 : {
10960 : signed char *pscTemp = static_cast<signed char *>(
10961 0 : CPLCalloc(nVarLen, sizeof(signed char)));
10962 0 : nc_get_vara_schar(nCdfId, nVarId, start, count, pscTemp);
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,", pscTemp[m]);
10968 0 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
10969 : }
10970 0 : snprintf(szTemp, sizeof(szTemp), "%d", pscTemp[m]);
10971 0 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
10972 0 : CPLFree(pscTemp);
10973 0 : break;
10974 : }
10975 0 : case NC_SHORT:
10976 : {
10977 : short *psTemp =
10978 0 : static_cast<short *>(CPLCalloc(nVarLen, sizeof(short)));
10979 0 : nc_get_vara_short(nCdfId, nVarId, start, count, psTemp);
10980 : char szTemp[256];
10981 0 : size_t m = 0;
10982 0 : for (; m < nVarLen - 1; m++)
10983 : {
10984 0 : snprintf(szTemp, sizeof(szTemp), "%d,", psTemp[m]);
10985 0 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
10986 : }
10987 0 : snprintf(szTemp, sizeof(szTemp), "%d", psTemp[m]);
10988 0 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
10989 0 : CPLFree(psTemp);
10990 0 : break;
10991 : }
10992 19 : case NC_INT:
10993 : {
10994 19 : int *pnTemp = static_cast<int *>(CPLCalloc(nVarLen, sizeof(int)));
10995 19 : nc_get_vara_int(nCdfId, nVarId, start, count, pnTemp);
10996 : char szTemp[256];
10997 19 : size_t m = 0;
10998 36 : for (; m < nVarLen - 1; m++)
10999 : {
11000 17 : snprintf(szTemp, sizeof(szTemp), "%d,", pnTemp[m]);
11001 17 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11002 : }
11003 19 : snprintf(szTemp, sizeof(szTemp), "%d", pnTemp[m]);
11004 19 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11005 19 : CPLFree(pnTemp);
11006 19 : break;
11007 : }
11008 8 : case NC_FLOAT:
11009 : {
11010 : float *pfTemp =
11011 8 : static_cast<float *>(CPLCalloc(nVarLen, sizeof(float)));
11012 8 : nc_get_vara_float(nCdfId, nVarId, start, count, pfTemp);
11013 : char szTemp[256];
11014 8 : size_t m = 0;
11015 325 : for (; m < nVarLen - 1; m++)
11016 : {
11017 317 : CPLsnprintf(szTemp, sizeof(szTemp), "%.8g,", pfTemp[m]);
11018 317 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11019 : }
11020 8 : CPLsnprintf(szTemp, sizeof(szTemp), "%.8g", pfTemp[m]);
11021 8 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11022 8 : CPLFree(pfTemp);
11023 8 : break;
11024 : }
11025 47 : case NC_DOUBLE:
11026 : {
11027 : double *pdfTemp =
11028 47 : static_cast<double *>(CPLCalloc(nVarLen, sizeof(double)));
11029 47 : nc_get_vara_double(nCdfId, nVarId, start, count, pdfTemp);
11030 : char szTemp[256];
11031 47 : size_t m = 0;
11032 225 : for (; m < nVarLen - 1; m++)
11033 : {
11034 178 : CPLsnprintf(szTemp, sizeof(szTemp), "%.16g,", pdfTemp[m]);
11035 178 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11036 : }
11037 47 : CPLsnprintf(szTemp, sizeof(szTemp), "%.16g", pdfTemp[m]);
11038 47 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11039 47 : CPLFree(pdfTemp);
11040 47 : break;
11041 : }
11042 0 : case NC_STRING:
11043 : {
11044 : char **ppszTemp =
11045 0 : static_cast<char **>(CPLCalloc(nVarLen, sizeof(char *)));
11046 0 : nc_get_vara_string(nCdfId, nVarId, start, count, ppszTemp);
11047 0 : size_t m = 0;
11048 0 : for (; m < nVarLen - 1; m++)
11049 : {
11050 0 : NCDFSafeStrcat(&pszVarValue, ppszTemp[m], &nVarValueSize);
11051 0 : NCDFSafeStrcat(&pszVarValue, ",", &nVarValueSize);
11052 : }
11053 0 : NCDFSafeStrcat(&pszVarValue, ppszTemp[m], &nVarValueSize);
11054 0 : nc_free_string(nVarLen, ppszTemp);
11055 0 : CPLFree(ppszTemp);
11056 0 : break;
11057 : }
11058 0 : case NC_UBYTE:
11059 : {
11060 : unsigned char *pucTemp;
11061 : pucTemp = static_cast<unsigned char *>(
11062 0 : CPLCalloc(nVarLen, sizeof(unsigned char)));
11063 0 : nc_get_vara_uchar(nCdfId, nVarId, start, count, pucTemp);
11064 : char szTemp[256];
11065 0 : size_t m = 0;
11066 0 : for (; m < nVarLen - 1; m++)
11067 : {
11068 0 : CPLsnprintf(szTemp, sizeof(szTemp), "%u,", pucTemp[m]);
11069 0 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11070 : }
11071 0 : CPLsnprintf(szTemp, sizeof(szTemp), "%u", pucTemp[m]);
11072 0 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11073 0 : CPLFree(pucTemp);
11074 0 : break;
11075 : }
11076 0 : case NC_USHORT:
11077 : {
11078 : unsigned short *pusTemp;
11079 : pusTemp = static_cast<unsigned short *>(
11080 0 : CPLCalloc(nVarLen, sizeof(unsigned short)));
11081 0 : nc_get_vara_ushort(nCdfId, nVarId, start, count, pusTemp);
11082 : char szTemp[256];
11083 0 : size_t m = 0;
11084 0 : for (; m < nVarLen - 1; m++)
11085 : {
11086 0 : CPLsnprintf(szTemp, sizeof(szTemp), "%u,", pusTemp[m]);
11087 0 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11088 : }
11089 0 : CPLsnprintf(szTemp, sizeof(szTemp), "%u", pusTemp[m]);
11090 0 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11091 0 : CPLFree(pusTemp);
11092 0 : break;
11093 : }
11094 0 : case NC_UINT:
11095 : {
11096 : unsigned int *punTemp;
11097 : punTemp = static_cast<unsigned int *>(
11098 0 : CPLCalloc(nVarLen, sizeof(unsigned int)));
11099 0 : nc_get_vara_uint(nCdfId, nVarId, start, count, punTemp);
11100 : char szTemp[256];
11101 0 : size_t m = 0;
11102 0 : for (; m < nVarLen - 1; m++)
11103 : {
11104 0 : CPLsnprintf(szTemp, sizeof(szTemp), "%u,", punTemp[m]);
11105 0 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11106 : }
11107 0 : CPLsnprintf(szTemp, sizeof(szTemp), "%u", punTemp[m]);
11108 0 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11109 0 : CPLFree(punTemp);
11110 0 : break;
11111 : }
11112 1 : case NC_INT64:
11113 : {
11114 : long long *pnTemp =
11115 1 : static_cast<long long *>(CPLCalloc(nVarLen, sizeof(long long)));
11116 1 : nc_get_vara_longlong(nCdfId, nVarId, start, count, pnTemp);
11117 : char szTemp[256];
11118 1 : size_t m = 0;
11119 2 : for (; m < nVarLen - 1; m++)
11120 : {
11121 1 : snprintf(szTemp, sizeof(szTemp), CPL_FRMT_GIB ",", pnTemp[m]);
11122 1 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11123 : }
11124 1 : snprintf(szTemp, sizeof(szTemp), CPL_FRMT_GIB, pnTemp[m]);
11125 1 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11126 1 : CPLFree(pnTemp);
11127 1 : break;
11128 : }
11129 0 : case NC_UINT64:
11130 : {
11131 : unsigned long long *pnTemp = static_cast<unsigned long long *>(
11132 0 : CPLCalloc(nVarLen, sizeof(unsigned long long)));
11133 0 : nc_get_vara_ulonglong(nCdfId, nVarId, start, count, pnTemp);
11134 : char szTemp[256];
11135 0 : size_t m = 0;
11136 0 : for (; m < nVarLen - 1; m++)
11137 : {
11138 0 : snprintf(szTemp, sizeof(szTemp), CPL_FRMT_GUIB ",", pnTemp[m]);
11139 0 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11140 : }
11141 0 : snprintf(szTemp, sizeof(szTemp), CPL_FRMT_GUIB, pnTemp[m]);
11142 0 : NCDFSafeStrcat(&pszVarValue, szTemp, &nVarValueSize);
11143 0 : CPLFree(pnTemp);
11144 0 : break;
11145 : }
11146 0 : default:
11147 0 : CPLDebug("GDAL_netCDF", "NCDFGetVar1D unsupported type %d",
11148 : nVarType);
11149 0 : CPLFree(pszVarValue);
11150 0 : pszVarValue = nullptr;
11151 0 : break;
11152 : }
11153 :
11154 75 : if (pszVarValue != nullptr && nVarLen > 1 && nVarType != NC_CHAR)
11155 40 : NCDFSafeStrcat(&pszVarValue, "}", &nVarValueSize);
11156 :
11157 : /* set return values */
11158 75 : *pszValue = pszVarValue;
11159 :
11160 75 : return CE_None;
11161 : }
11162 :
11163 8 : static CPLErr NCDFPut1DVar(int nCdfId, int nVarId, const char *pszValue)
11164 : {
11165 8 : if (EQUAL(pszValue, ""))
11166 0 : return CE_Failure;
11167 :
11168 : /* get var information */
11169 8 : int nVarDimId = -1;
11170 8 : int status = nc_inq_varndims(nCdfId, nVarId, &nVarDimId);
11171 8 : if (status != NC_NOERR || nVarDimId != 1)
11172 0 : return CE_Failure;
11173 :
11174 8 : status = nc_inq_vardimid(nCdfId, nVarId, &nVarDimId);
11175 8 : if (status != NC_NOERR)
11176 0 : return CE_Failure;
11177 :
11178 8 : nc_type nVarType = NC_CHAR;
11179 8 : status = nc_inq_vartype(nCdfId, nVarId, &nVarType);
11180 8 : if (status != NC_NOERR)
11181 0 : return CE_Failure;
11182 :
11183 8 : size_t nVarLen = 0;
11184 8 : status = nc_inq_dimlen(nCdfId, nVarDimId, &nVarLen);
11185 8 : if (status != NC_NOERR)
11186 0 : return CE_Failure;
11187 :
11188 8 : size_t start[1] = {0};
11189 8 : size_t count[1] = {nVarLen};
11190 :
11191 : /* get the values as tokens */
11192 8 : char **papszValues = NCDFTokenizeArray(pszValue);
11193 8 : if (papszValues == nullptr)
11194 0 : return CE_Failure;
11195 :
11196 8 : nVarLen = CSLCount(papszValues);
11197 :
11198 : /* now write the data */
11199 8 : if (nVarType == NC_CHAR)
11200 : {
11201 0 : status = nc_put_vara_text(nCdfId, nVarId, start, count, pszValue);
11202 0 : NCDF_ERR(status);
11203 : }
11204 : else
11205 : {
11206 8 : switch (nVarType)
11207 : {
11208 0 : case NC_BYTE:
11209 : {
11210 : signed char *pscTemp = static_cast<signed char *>(
11211 0 : CPLCalloc(nVarLen, sizeof(signed char)));
11212 0 : for (size_t i = 0; i < nVarLen; i++)
11213 : {
11214 0 : char *pszTemp = nullptr;
11215 0 : pscTemp[i] = static_cast<signed char>(
11216 0 : strtol(papszValues[i], &pszTemp, 10));
11217 : }
11218 : status =
11219 0 : nc_put_vara_schar(nCdfId, nVarId, start, count, pscTemp);
11220 0 : NCDF_ERR(status);
11221 0 : CPLFree(pscTemp);
11222 0 : break;
11223 : }
11224 0 : case NC_SHORT:
11225 : {
11226 : short *psTemp =
11227 0 : static_cast<short *>(CPLCalloc(nVarLen, sizeof(short)));
11228 0 : for (size_t i = 0; i < nVarLen; i++)
11229 : {
11230 0 : char *pszTemp = nullptr;
11231 0 : psTemp[i] = static_cast<short>(
11232 0 : strtol(papszValues[i], &pszTemp, 10));
11233 : }
11234 : status =
11235 0 : nc_put_vara_short(nCdfId, nVarId, start, count, psTemp);
11236 0 : NCDF_ERR(status);
11237 0 : CPLFree(psTemp);
11238 0 : break;
11239 : }
11240 3 : case NC_INT:
11241 : {
11242 : int *pnTemp =
11243 3 : static_cast<int *>(CPLCalloc(nVarLen, sizeof(int)));
11244 11 : for (size_t i = 0; i < nVarLen; i++)
11245 : {
11246 8 : char *pszTemp = nullptr;
11247 8 : pnTemp[i] =
11248 8 : static_cast<int>(strtol(papszValues[i], &pszTemp, 10));
11249 : }
11250 3 : status = nc_put_vara_int(nCdfId, nVarId, start, count, pnTemp);
11251 3 : NCDF_ERR(status);
11252 3 : CPLFree(pnTemp);
11253 3 : break;
11254 : }
11255 0 : case NC_FLOAT:
11256 : {
11257 : float *pfTemp =
11258 0 : static_cast<float *>(CPLCalloc(nVarLen, sizeof(float)));
11259 0 : for (size_t i = 0; i < nVarLen; i++)
11260 : {
11261 0 : char *pszTemp = nullptr;
11262 0 : pfTemp[i] =
11263 0 : static_cast<float>(CPLStrtod(papszValues[i], &pszTemp));
11264 : }
11265 : status =
11266 0 : nc_put_vara_float(nCdfId, nVarId, start, count, pfTemp);
11267 0 : NCDF_ERR(status);
11268 0 : CPLFree(pfTemp);
11269 0 : break;
11270 : }
11271 5 : case NC_DOUBLE:
11272 : {
11273 : double *pdfTemp =
11274 5 : static_cast<double *>(CPLCalloc(nVarLen, sizeof(double)));
11275 19 : for (size_t i = 0; i < nVarLen; i++)
11276 : {
11277 14 : char *pszTemp = nullptr;
11278 14 : pdfTemp[i] = CPLStrtod(papszValues[i], &pszTemp);
11279 : }
11280 : status =
11281 5 : nc_put_vara_double(nCdfId, nVarId, start, count, pdfTemp);
11282 5 : NCDF_ERR(status);
11283 5 : CPLFree(pdfTemp);
11284 5 : break;
11285 : }
11286 0 : default:
11287 : {
11288 0 : int nTmpFormat = 0;
11289 0 : status = nc_inq_format(nCdfId, &nTmpFormat);
11290 0 : NCDF_ERR(status);
11291 0 : if (nTmpFormat == NCDF_FORMAT_NC4)
11292 : {
11293 0 : switch (nVarType)
11294 : {
11295 0 : case NC_STRING:
11296 : {
11297 : status =
11298 0 : nc_put_vara_string(nCdfId, nVarId, start, count,
11299 : (const char **)papszValues);
11300 0 : NCDF_ERR(status);
11301 0 : break;
11302 : }
11303 0 : case NC_UBYTE:
11304 : {
11305 : unsigned char *pucTemp =
11306 : static_cast<unsigned char *>(
11307 0 : CPLCalloc(nVarLen, sizeof(unsigned char)));
11308 0 : for (size_t i = 0; i < nVarLen; i++)
11309 : {
11310 0 : char *pszTemp = nullptr;
11311 0 : pucTemp[i] = static_cast<unsigned char>(
11312 0 : strtoul(papszValues[i], &pszTemp, 10));
11313 : }
11314 0 : status = nc_put_vara_uchar(nCdfId, nVarId, start,
11315 : count, pucTemp);
11316 0 : NCDF_ERR(status);
11317 0 : CPLFree(pucTemp);
11318 0 : break;
11319 : }
11320 0 : case NC_USHORT:
11321 : {
11322 : unsigned short *pusTemp =
11323 : static_cast<unsigned short *>(
11324 0 : CPLCalloc(nVarLen, sizeof(unsigned short)));
11325 0 : for (size_t i = 0; i < nVarLen; i++)
11326 : {
11327 0 : char *pszTemp = nullptr;
11328 0 : pusTemp[i] = static_cast<unsigned short>(
11329 0 : strtoul(papszValues[i], &pszTemp, 10));
11330 : }
11331 0 : status = nc_put_vara_ushort(nCdfId, nVarId, start,
11332 : count, pusTemp);
11333 0 : NCDF_ERR(status);
11334 0 : CPLFree(pusTemp);
11335 0 : break;
11336 : }
11337 0 : case NC_UINT:
11338 : {
11339 : unsigned int *punTemp = static_cast<unsigned int *>(
11340 0 : CPLCalloc(nVarLen, sizeof(unsigned int)));
11341 0 : for (size_t i = 0; i < nVarLen; i++)
11342 : {
11343 0 : char *pszTemp = nullptr;
11344 0 : punTemp[i] = static_cast<unsigned int>(
11345 0 : strtoul(papszValues[i], &pszTemp, 10));
11346 : }
11347 0 : status = nc_put_vara_uint(nCdfId, nVarId, start,
11348 : count, punTemp);
11349 0 : NCDF_ERR(status);
11350 0 : CPLFree(punTemp);
11351 0 : break;
11352 : }
11353 0 : default:
11354 0 : if (papszValues)
11355 0 : CSLDestroy(papszValues);
11356 0 : return CE_Failure;
11357 : break;
11358 : }
11359 : }
11360 0 : break;
11361 : }
11362 : }
11363 : }
11364 :
11365 8 : if (papszValues)
11366 8 : CSLDestroy(papszValues);
11367 :
11368 8 : return CE_None;
11369 : }
11370 :
11371 : /************************************************************************/
11372 : /* GetDefaultNoDataValue() */
11373 : /************************************************************************/
11374 :
11375 188 : double NCDFGetDefaultNoDataValue(int nCdfId, int nVarId, int nVarType,
11376 : bool &bGotNoData)
11377 :
11378 : {
11379 188 : int nNoFill = 0;
11380 188 : double dfNoData = 0.0;
11381 :
11382 188 : switch (nVarType)
11383 : {
11384 0 : case NC_CHAR:
11385 : case NC_BYTE:
11386 : case NC_UBYTE:
11387 : // Don't do default fill-values for bytes, too risky.
11388 : // This function should not be called in those cases.
11389 0 : CPLAssert(false);
11390 : break;
11391 24 : case NC_SHORT:
11392 : {
11393 24 : short nFillVal = 0;
11394 24 : if (nc_inq_var_fill(nCdfId, nVarId, &nNoFill, &nFillVal) ==
11395 : NC_NOERR)
11396 : {
11397 24 : if (!nNoFill)
11398 : {
11399 23 : bGotNoData = true;
11400 23 : dfNoData = nFillVal;
11401 : }
11402 : }
11403 : else
11404 0 : dfNoData = NC_FILL_SHORT;
11405 24 : break;
11406 : }
11407 26 : case NC_INT:
11408 : {
11409 26 : int nFillVal = 0;
11410 26 : if (nc_inq_var_fill(nCdfId, nVarId, &nNoFill, &nFillVal) ==
11411 : NC_NOERR)
11412 : {
11413 26 : if (!nNoFill)
11414 : {
11415 25 : bGotNoData = true;
11416 25 : dfNoData = nFillVal;
11417 : }
11418 : }
11419 : else
11420 0 : dfNoData = NC_FILL_INT;
11421 26 : break;
11422 : }
11423 71 : case NC_FLOAT:
11424 : {
11425 71 : float fFillVal = 0;
11426 71 : if (nc_inq_var_fill(nCdfId, nVarId, &nNoFill, &fFillVal) ==
11427 : NC_NOERR)
11428 : {
11429 71 : if (!nNoFill)
11430 : {
11431 67 : bGotNoData = true;
11432 67 : dfNoData = fFillVal;
11433 : }
11434 : }
11435 : else
11436 0 : dfNoData = NC_FILL_FLOAT;
11437 71 : break;
11438 : }
11439 34 : case NC_DOUBLE:
11440 : {
11441 34 : if (nc_inq_var_fill(nCdfId, nVarId, &nNoFill, &dfNoData) ==
11442 : NC_NOERR)
11443 : {
11444 34 : if (!nNoFill)
11445 : {
11446 34 : bGotNoData = true;
11447 : }
11448 : }
11449 : else
11450 0 : dfNoData = NC_FILL_DOUBLE;
11451 34 : break;
11452 : }
11453 7 : case NC_USHORT:
11454 : {
11455 7 : unsigned short nFillVal = 0;
11456 7 : if (nc_inq_var_fill(nCdfId, nVarId, &nNoFill, &nFillVal) ==
11457 : NC_NOERR)
11458 : {
11459 7 : if (!nNoFill)
11460 : {
11461 7 : bGotNoData = true;
11462 7 : dfNoData = nFillVal;
11463 : }
11464 : }
11465 : else
11466 0 : dfNoData = NC_FILL_USHORT;
11467 7 : break;
11468 : }
11469 7 : case NC_UINT:
11470 : {
11471 7 : unsigned int nFillVal = 0;
11472 7 : if (nc_inq_var_fill(nCdfId, nVarId, &nNoFill, &nFillVal) ==
11473 : NC_NOERR)
11474 : {
11475 7 : if (!nNoFill)
11476 : {
11477 7 : bGotNoData = true;
11478 7 : dfNoData = nFillVal;
11479 : }
11480 : }
11481 : else
11482 0 : dfNoData = NC_FILL_UINT;
11483 7 : break;
11484 : }
11485 19 : default:
11486 19 : dfNoData = 0.0;
11487 19 : break;
11488 : }
11489 :
11490 188 : return dfNoData;
11491 : }
11492 :
11493 : /************************************************************************/
11494 : /* NCDFGetDefaultNoDataValueAsInt64() */
11495 : /************************************************************************/
11496 :
11497 2 : int64_t NCDFGetDefaultNoDataValueAsInt64(int nCdfId, int nVarId,
11498 : bool &bGotNoData)
11499 :
11500 : {
11501 2 : int nNoFill = 0;
11502 2 : long long nFillVal = 0;
11503 2 : if (nc_inq_var_fill(nCdfId, nVarId, &nNoFill, &nFillVal) == NC_NOERR)
11504 : {
11505 2 : if (!nNoFill)
11506 : {
11507 2 : bGotNoData = true;
11508 2 : return static_cast<int64_t>(nFillVal);
11509 : }
11510 : }
11511 : else
11512 0 : return static_cast<int64_t>(NC_FILL_INT64);
11513 0 : return 0;
11514 : }
11515 :
11516 : /************************************************************************/
11517 : /* NCDFGetDefaultNoDataValueAsUInt64() */
11518 : /************************************************************************/
11519 :
11520 1 : uint64_t NCDFGetDefaultNoDataValueAsUInt64(int nCdfId, int nVarId,
11521 : bool &bGotNoData)
11522 :
11523 : {
11524 1 : int nNoFill = 0;
11525 1 : unsigned long long nFillVal = 0;
11526 1 : if (nc_inq_var_fill(nCdfId, nVarId, &nNoFill, &nFillVal) == NC_NOERR)
11527 : {
11528 1 : if (!nNoFill)
11529 : {
11530 1 : bGotNoData = true;
11531 1 : return static_cast<uint64_t>(nFillVal);
11532 : }
11533 : }
11534 : else
11535 0 : return static_cast<uint64_t>(NC_FILL_UINT64);
11536 0 : return 0;
11537 : }
11538 :
11539 11087 : static int NCDFDoesVarContainAttribVal(int nCdfId,
11540 : const char *const *papszAttribNames,
11541 : const char *const *papszAttribValues,
11542 : int nVarId, const char *pszVarName,
11543 : bool bStrict = true)
11544 : {
11545 11087 : if (nVarId == -1 && pszVarName != nullptr)
11546 8116 : NCDFResolveVar(nCdfId, pszVarName, &nCdfId, &nVarId);
11547 :
11548 11087 : if (nVarId == -1)
11549 878 : return -1;
11550 :
11551 10209 : bool bFound = false;
11552 47648 : for (int i = 0; !bFound && papszAttribNames != nullptr &&
11553 45390 : papszAttribNames[i] != nullptr;
11554 : i++)
11555 : {
11556 37439 : char *pszTemp = nullptr;
11557 37439 : if (NCDFGetAttr(nCdfId, nVarId, papszAttribNames[i], &pszTemp) ==
11558 53756 : CE_None &&
11559 16317 : pszTemp != nullptr)
11560 : {
11561 16317 : if (bStrict)
11562 : {
11563 16317 : if (EQUAL(pszTemp, papszAttribValues[i]))
11564 2258 : bFound = true;
11565 : }
11566 : else
11567 : {
11568 0 : if (EQUALN(pszTemp, papszAttribValues[i],
11569 : strlen(papszAttribValues[i])))
11570 0 : bFound = true;
11571 : }
11572 16317 : CPLFree(pszTemp);
11573 : }
11574 : }
11575 10209 : return bFound;
11576 : }
11577 :
11578 1958 : static int NCDFDoesVarContainAttribVal2(int nCdfId, const char *papszAttribName,
11579 : const char *const *papszAttribValues,
11580 : int nVarId, const char *pszVarName,
11581 : int bStrict = true)
11582 : {
11583 1958 : if (nVarId == -1 && pszVarName != nullptr)
11584 1575 : NCDFResolveVar(nCdfId, pszVarName, &nCdfId, &nVarId);
11585 :
11586 1958 : if (nVarId == -1)
11587 0 : return -1;
11588 :
11589 1958 : bool bFound = false;
11590 1958 : char *pszTemp = nullptr;
11591 2337 : if (NCDFGetAttr(nCdfId, nVarId, papszAttribName, &pszTemp) != CE_None ||
11592 379 : pszTemp == nullptr)
11593 1579 : return FALSE;
11594 :
11595 7703 : for (int i = 0; !bFound && i < CSLCount(papszAttribValues); i++)
11596 : {
11597 7324 : if (bStrict)
11598 : {
11599 7296 : if (EQUAL(pszTemp, papszAttribValues[i]))
11600 31 : bFound = true;
11601 : }
11602 : else
11603 : {
11604 28 : if (EQUALN(pszTemp, papszAttribValues[i],
11605 : strlen(papszAttribValues[i])))
11606 0 : bFound = true;
11607 : }
11608 : }
11609 :
11610 379 : CPLFree(pszTemp);
11611 :
11612 379 : return bFound;
11613 : }
11614 :
11615 876 : static bool NCDFEqual(const char *papszName, const char *const *papszValues)
11616 : {
11617 876 : if (papszName == nullptr || EQUAL(papszName, ""))
11618 0 : return false;
11619 :
11620 2392 : for (int i = 0; papszValues && papszValues[i]; ++i)
11621 : {
11622 1636 : if (EQUAL(papszName, papszValues[i]))
11623 120 : return true;
11624 : }
11625 :
11626 756 : return false;
11627 : }
11628 :
11629 : // Test that a variable is longitude/latitude coordinate,
11630 : // following CF 4.1 and 4.2.
11631 3782 : bool NCDFIsVarLongitude(int nCdfId, int nVarId, const char *pszVarName)
11632 : {
11633 : // Check for matching attributes.
11634 3782 : int bVal = NCDFDoesVarContainAttribVal(nCdfId, papszCFLongitudeAttribNames,
11635 : papszCFLongitudeAttribValues, nVarId,
11636 : pszVarName);
11637 : // If not found using attributes then check using var name
11638 : // unless GDAL_NETCDF_VERIFY_DIMS=STRICT.
11639 3782 : if (bVal == -1)
11640 : {
11641 280 : if (!EQUAL(CPLGetConfigOption("GDAL_NETCDF_VERIFY_DIMS", "YES"),
11642 : "STRICT"))
11643 280 : bVal = NCDFEqual(pszVarName, papszCFLongitudeVarNames);
11644 : else
11645 0 : bVal = FALSE;
11646 : }
11647 3502 : else if (bVal)
11648 : {
11649 : // Check that the units is not 'm' or '1'. See #6759
11650 789 : char *pszTemp = nullptr;
11651 1169 : if (NCDFGetAttr(nCdfId, nVarId, "units", &pszTemp) == CE_None &&
11652 380 : pszTemp != nullptr)
11653 : {
11654 380 : if (EQUAL(pszTemp, "m") || EQUAL(pszTemp, "1"))
11655 97 : bVal = false;
11656 380 : CPLFree(pszTemp);
11657 : }
11658 : }
11659 :
11660 3782 : return CPL_TO_BOOL(bVal);
11661 : }
11662 :
11663 2167 : bool NCDFIsVarLatitude(int nCdfId, int nVarId, const char *pszVarName)
11664 : {
11665 2167 : int bVal = NCDFDoesVarContainAttribVal(nCdfId, papszCFLatitudeAttribNames,
11666 : papszCFLatitudeAttribValues, nVarId,
11667 : pszVarName);
11668 2167 : if (bVal == -1)
11669 : {
11670 163 : if (!EQUAL(CPLGetConfigOption("GDAL_NETCDF_VERIFY_DIMS", "YES"),
11671 : "STRICT"))
11672 163 : bVal = NCDFEqual(pszVarName, papszCFLatitudeVarNames);
11673 : else
11674 0 : bVal = FALSE;
11675 : }
11676 2004 : else if (bVal)
11677 : {
11678 : // Check that the units is not 'm' or '1'. See #6759
11679 543 : char *pszTemp = nullptr;
11680 685 : if (NCDFGetAttr(nCdfId, nVarId, "units", &pszTemp) == CE_None &&
11681 142 : pszTemp != nullptr)
11682 : {
11683 142 : if (EQUAL(pszTemp, "m") || EQUAL(pszTemp, "1"))
11684 36 : bVal = false;
11685 142 : CPLFree(pszTemp);
11686 : }
11687 : }
11688 :
11689 2167 : return CPL_TO_BOOL(bVal);
11690 : }
11691 :
11692 2293 : bool NCDFIsVarProjectionX(int nCdfId, int nVarId, const char *pszVarName)
11693 : {
11694 2293 : int bVal = NCDFDoesVarContainAttribVal(
11695 : nCdfId, papszCFProjectionXAttribNames, papszCFProjectionXAttribValues,
11696 : nVarId, pszVarName);
11697 2293 : if (bVal == -1)
11698 : {
11699 274 : if (!EQUAL(CPLGetConfigOption("GDAL_NETCDF_VERIFY_DIMS", "YES"),
11700 : "STRICT"))
11701 274 : bVal = NCDFEqual(pszVarName, papszCFProjectionXVarNames);
11702 : else
11703 0 : bVal = FALSE;
11704 : }
11705 2019 : else if (bVal)
11706 : {
11707 : // Check that the units is not '1'
11708 374 : char *pszTemp = nullptr;
11709 533 : if (NCDFGetAttr(nCdfId, nVarId, "units", &pszTemp) == CE_None &&
11710 159 : pszTemp != nullptr)
11711 : {
11712 159 : if (EQUAL(pszTemp, "1"))
11713 5 : bVal = false;
11714 159 : CPLFree(pszTemp);
11715 : }
11716 : }
11717 :
11718 2293 : return CPL_TO_BOOL(bVal);
11719 : }
11720 :
11721 1623 : bool NCDFIsVarProjectionY(int nCdfId, int nVarId, const char *pszVarName)
11722 : {
11723 1623 : int bVal = NCDFDoesVarContainAttribVal(
11724 : nCdfId, papszCFProjectionYAttribNames, papszCFProjectionYAttribValues,
11725 : nVarId, pszVarName);
11726 1623 : if (bVal == -1)
11727 : {
11728 159 : if (!EQUAL(CPLGetConfigOption("GDAL_NETCDF_VERIFY_DIMS", "YES"),
11729 : "STRICT"))
11730 159 : bVal = NCDFEqual(pszVarName, papszCFProjectionYVarNames);
11731 : else
11732 0 : bVal = FALSE;
11733 : }
11734 1464 : else if (bVal)
11735 : {
11736 : // Check that the units is not '1'
11737 373 : char *pszTemp = nullptr;
11738 531 : if (NCDFGetAttr(nCdfId, nVarId, "units", &pszTemp) == CE_None &&
11739 158 : pszTemp != nullptr)
11740 : {
11741 158 : if (EQUAL(pszTemp, "1"))
11742 5 : bVal = false;
11743 158 : CPLFree(pszTemp);
11744 : }
11745 : }
11746 :
11747 1623 : return CPL_TO_BOOL(bVal);
11748 : }
11749 :
11750 : /* test that a variable is a vertical coordinate, following CF 4.3 */
11751 1020 : bool NCDFIsVarVerticalCoord(int nCdfId, int nVarId, const char *pszVarName)
11752 : {
11753 : /* check for matching attributes */
11754 1020 : if (NCDFDoesVarContainAttribVal(nCdfId, papszCFVerticalAttribNames,
11755 : papszCFVerticalAttribValues, nVarId,
11756 1020 : pszVarName))
11757 72 : return true;
11758 : /* check for matching units */
11759 948 : else if (NCDFDoesVarContainAttribVal2(nCdfId, CF_UNITS,
11760 : papszCFVerticalUnitsValues, nVarId,
11761 948 : pszVarName))
11762 31 : return true;
11763 : /* check for matching standard name */
11764 917 : else if (NCDFDoesVarContainAttribVal2(nCdfId, CF_STD_NAME,
11765 : papszCFVerticalStandardNameValues,
11766 917 : nVarId, pszVarName))
11767 0 : return true;
11768 : else
11769 917 : return false;
11770 : }
11771 :
11772 : /* test that a variable is a time coordinate, following CF 4.4 */
11773 202 : bool NCDFIsVarTimeCoord(int nCdfId, int nVarId, const char *pszVarName)
11774 : {
11775 : /* check for matching attributes */
11776 202 : if (NCDFDoesVarContainAttribVal(nCdfId, papszCFTimeAttribNames,
11777 : papszCFTimeAttribValues, nVarId,
11778 202 : pszVarName))
11779 109 : return true;
11780 : /* check for matching units */
11781 93 : else if (NCDFDoesVarContainAttribVal2(nCdfId, CF_UNITS,
11782 : papszCFTimeUnitsValues, nVarId,
11783 93 : pszVarName, false))
11784 0 : return true;
11785 : else
11786 93 : return false;
11787 : }
11788 :
11789 : // Parse a string, and return as a string list.
11790 : // If it an array of the form {a,b}, then tokenize it.
11791 : // Otherwise, return a copy.
11792 188 : static char **NCDFTokenizeArray(const char *pszValue)
11793 : {
11794 188 : if (pszValue == nullptr || EQUAL(pszValue, ""))
11795 53 : return nullptr;
11796 :
11797 135 : char **papszValues = nullptr;
11798 135 : const int nLen = static_cast<int>(strlen(pszValue));
11799 :
11800 135 : if (pszValue[0] == '{' && nLen > 2 && pszValue[nLen - 1] == '}')
11801 : {
11802 41 : char *pszTemp = static_cast<char *>(CPLMalloc((nLen - 2) + 1));
11803 41 : strncpy(pszTemp, pszValue + 1, nLen - 2);
11804 41 : pszTemp[nLen - 2] = '\0';
11805 41 : papszValues = CSLTokenizeString2(pszTemp, ",", CSLT_ALLOWEMPTYTOKENS);
11806 41 : CPLFree(pszTemp);
11807 : }
11808 : else
11809 : {
11810 94 : papszValues = reinterpret_cast<char **>(CPLCalloc(2, sizeof(char *)));
11811 94 : papszValues[0] = CPLStrdup(pszValue);
11812 94 : papszValues[1] = nullptr;
11813 : }
11814 :
11815 135 : return papszValues;
11816 : }
11817 :
11818 : // Open a NetCDF subdataset from full path /group1/group2/.../groupn/var.
11819 : // Leading slash is optional.
11820 412 : static CPLErr NCDFOpenSubDataset(int nCdfId, const char *pszSubdatasetName,
11821 : int *pnGroupId, int *pnVarId)
11822 : {
11823 412 : *pnGroupId = -1;
11824 412 : *pnVarId = -1;
11825 :
11826 : // Open group.
11827 : char *pszGroupFullName =
11828 412 : CPLStrdup(CPLGetPathSafe(pszSubdatasetName).c_str());
11829 : // Add a leading slash if needed.
11830 412 : if (pszGroupFullName[0] != '/')
11831 : {
11832 396 : char *old = pszGroupFullName;
11833 396 : pszGroupFullName = CPLStrdup(CPLSPrintf("/%s", pszGroupFullName));
11834 396 : CPLFree(old);
11835 : }
11836 : // Detect root group.
11837 412 : if (EQUAL(pszGroupFullName, "/"))
11838 : {
11839 396 : *pnGroupId = nCdfId;
11840 396 : CPLFree(pszGroupFullName);
11841 : }
11842 : else
11843 : {
11844 16 : int status = nc_inq_grp_full_ncid(nCdfId, pszGroupFullName, pnGroupId);
11845 16 : CPLFree(pszGroupFullName);
11846 16 : NCDF_ERR_RET(status);
11847 : }
11848 :
11849 : // Open var.
11850 412 : const char *pszVarName = CPLGetFilename(pszSubdatasetName);
11851 412 : NCDF_ERR_RET(nc_inq_varid(*pnGroupId, pszVarName, pnVarId));
11852 :
11853 412 : return CE_None;
11854 : }
11855 :
11856 : // Get all dimensions visible from a given NetCDF (or group) ID and any of
11857 : // its parents.
11858 352 : static CPLErr NCDFGetVisibleDims(int nGroupId, int *pnDims, int **ppanDimIds)
11859 : {
11860 352 : int nDims = 0;
11861 352 : int *panDimIds = nullptr;
11862 352 : NCDF_ERR_RET(nc_inq_dimids(nGroupId, &nDims, nullptr, true));
11863 :
11864 352 : panDimIds = static_cast<int *>(CPLMalloc(nDims * sizeof(int)));
11865 :
11866 352 : int status = nc_inq_dimids(nGroupId, nullptr, panDimIds, true);
11867 352 : if (status != NC_NOERR)
11868 0 : CPLFree(panDimIds);
11869 352 : NCDF_ERR_RET(status);
11870 :
11871 352 : *pnDims = nDims;
11872 352 : *ppanDimIds = panDimIds;
11873 :
11874 352 : return CE_None;
11875 : }
11876 :
11877 : // Get direct sub-groups IDs of a given NetCDF (or group) ID.
11878 : // Consider only direct children, does not get children of children.
11879 3051 : static CPLErr NCDFGetSubGroups(int nGroupId, int *pnSubGroups,
11880 : int **ppanSubGroupIds)
11881 : {
11882 3051 : *pnSubGroups = 0;
11883 3051 : *ppanSubGroupIds = nullptr;
11884 :
11885 : int nSubGroups;
11886 3051 : NCDF_ERR_RET(nc_inq_grps(nGroupId, &nSubGroups, nullptr));
11887 : int *panSubGroupIds =
11888 3051 : static_cast<int *>(CPLMalloc(nSubGroups * sizeof(int)));
11889 3051 : NCDF_ERR_RET(nc_inq_grps(nGroupId, nullptr, panSubGroupIds));
11890 3051 : *pnSubGroups = nSubGroups;
11891 3051 : *ppanSubGroupIds = panSubGroupIds;
11892 :
11893 3051 : return CE_None;
11894 : }
11895 :
11896 : // Get the full name of a given NetCDF (or group) ID
11897 : // (e.g. /group1/group2/.../groupn).
11898 : // bNC3Compat remove the leading slash for top-level variables for
11899 : // backward compatibility (top-level variables are the ones in the root group).
11900 15474 : static CPLErr NCDFGetGroupFullName(int nGroupId, char **ppszFullName,
11901 : bool bNC3Compat)
11902 : {
11903 15474 : *ppszFullName = nullptr;
11904 :
11905 : size_t nFullNameLen;
11906 15474 : NCDF_ERR_RET(nc_inq_grpname_len(nGroupId, &nFullNameLen));
11907 15474 : *ppszFullName =
11908 15474 : static_cast<char *>(CPLMalloc((nFullNameLen + 1) * sizeof(char)));
11909 15474 : int status = nc_inq_grpname_full(nGroupId, &nFullNameLen, *ppszFullName);
11910 15474 : if (status != NC_NOERR)
11911 : {
11912 0 : CPLFree(*ppszFullName);
11913 0 : *ppszFullName = nullptr;
11914 0 : NCDF_ERR_RET(status);
11915 : }
11916 :
11917 15474 : if (bNC3Compat && EQUAL(*ppszFullName, "/"))
11918 7959 : (*ppszFullName)[0] = '\0';
11919 :
11920 15474 : return CE_None;
11921 : }
11922 :
11923 7325 : CPLString NCDFGetGroupFullName(int nGroupId)
11924 : {
11925 7325 : char *pszFullname = nullptr;
11926 7325 : NCDFGetGroupFullName(nGroupId, &pszFullname, false);
11927 7325 : CPLString osRet(pszFullname ? pszFullname : "");
11928 7325 : CPLFree(pszFullname);
11929 14650 : return osRet;
11930 : }
11931 :
11932 : // Get the full name of a given NetCDF variable ID
11933 : // (e.g. /group1/group2/.../groupn/var).
11934 : // Handle also NC_GLOBAL as nVarId.
11935 : // bNC3Compat remove the leading slash for top-level variables for
11936 : // backward compatibility (top-level variables are the ones in the root group).
11937 8100 : static CPLErr NCDFGetVarFullName(int nGroupId, int nVarId, char **ppszFullName,
11938 : bool bNC3Compat)
11939 : {
11940 8100 : *ppszFullName = nullptr;
11941 8100 : char *pszGroupFullName = nullptr;
11942 8100 : ERR_RET(NCDFGetGroupFullName(nGroupId, &pszGroupFullName, bNC3Compat));
11943 : char szVarName[NC_MAX_NAME + 1];
11944 8100 : if (nVarId == NC_GLOBAL)
11945 : {
11946 1093 : strcpy(szVarName, "NC_GLOBAL");
11947 : }
11948 : else
11949 : {
11950 7007 : int status = nc_inq_varname(nGroupId, nVarId, szVarName);
11951 7007 : if (status != NC_NOERR)
11952 : {
11953 0 : CPLFree(pszGroupFullName);
11954 0 : NCDF_ERR_RET(status);
11955 : }
11956 : }
11957 8100 : const char *pszSep = "/";
11958 8100 : if (EQUAL(pszGroupFullName, "/") || EQUAL(pszGroupFullName, ""))
11959 7912 : pszSep = "";
11960 8100 : *ppszFullName =
11961 8100 : CPLStrdup(CPLSPrintf("%s%s%s", pszGroupFullName, pszSep, szVarName));
11962 8100 : CPLFree(pszGroupFullName);
11963 8100 : return CE_None;
11964 : }
11965 :
11966 : // Get the NetCDF root group ID of a given group ID.
11967 0 : static CPLErr NCDFGetRootGroup(int nStartGroupId, int *pnRootGroupId)
11968 : {
11969 0 : *pnRootGroupId = -1;
11970 : // Recurse on parent group.
11971 : int nParentGroupId;
11972 0 : int status = nc_inq_grp_parent(nStartGroupId, &nParentGroupId);
11973 0 : if (status == NC_NOERR)
11974 0 : return NCDFGetRootGroup(nParentGroupId, pnRootGroupId);
11975 0 : else if (status != NC_ENOGRP)
11976 0 : NCDF_ERR_RET(status);
11977 : else // No more parent group.
11978 : {
11979 0 : *pnRootGroupId = nStartGroupId;
11980 : }
11981 :
11982 0 : return CE_None;
11983 : }
11984 :
11985 : // Implementation of NCDFResolveVar/Att.
11986 13182 : static CPLErr NCDFResolveElem(int nStartGroupId, const char *pszVar,
11987 : const char *pszAtt, int *pnGroupId, int *pnId,
11988 : bool bMandatory)
11989 : {
11990 13182 : if (!pszVar && !pszAtt)
11991 : {
11992 0 : CPLError(CE_Failure, CPLE_IllegalArg,
11993 : "pszVar and pszAtt NCDFResolveElem() args are both null.");
11994 0 : return CE_Failure;
11995 : }
11996 :
11997 : enum
11998 : {
11999 : NCRM_PARENT,
12000 : NCRM_WIDTH_WISE
12001 13182 : } eNCResolveMode = NCRM_PARENT;
12002 :
12003 26364 : std::queue<int> aoQueueGroupIdsToVisit;
12004 13182 : aoQueueGroupIdsToVisit.push(nStartGroupId);
12005 :
12006 14851 : while (!aoQueueGroupIdsToVisit.empty())
12007 : {
12008 : // Get the first group of the FIFO queue.
12009 13329 : *pnGroupId = aoQueueGroupIdsToVisit.front();
12010 13329 : aoQueueGroupIdsToVisit.pop();
12011 :
12012 : // Look if this group contains the searched element.
12013 : int status;
12014 13329 : if (pszVar)
12015 13110 : status = nc_inq_varid(*pnGroupId, pszVar, pnId);
12016 : else // pszAtt != nullptr.
12017 219 : status = nc_inq_attid(*pnGroupId, NC_GLOBAL, pszAtt, pnId);
12018 :
12019 13329 : if (status == NC_NOERR)
12020 : {
12021 11660 : return CE_None;
12022 : }
12023 1669 : else if ((pszVar && status != NC_ENOTVAR) ||
12024 216 : (pszAtt && status != NC_ENOTATT))
12025 : {
12026 0 : NCDF_ERR(status);
12027 : }
12028 : // Element not found, in NC4 case we must search in other groups
12029 : // following the CF logic.
12030 :
12031 : // The first resolve mode consists to search on parent groups.
12032 1669 : if (eNCResolveMode == NCRM_PARENT)
12033 : {
12034 1569 : int nParentGroupId = -1;
12035 1569 : int status2 = nc_inq_grp_parent(*pnGroupId, &nParentGroupId);
12036 1569 : if (status2 == NC_NOERR)
12037 45 : aoQueueGroupIdsToVisit.push(nParentGroupId);
12038 1524 : else if (status2 != NC_ENOGRP)
12039 0 : NCDF_ERR(status2);
12040 1524 : else if (pszVar)
12041 : // When resolving a variable, if there is no more
12042 : // parent group then we switch to width-wise search mode
12043 : // starting from the latest found parent group.
12044 1311 : eNCResolveMode = NCRM_WIDTH_WISE;
12045 : }
12046 :
12047 : // The second resolve mode is a width-wise search.
12048 1669 : if (eNCResolveMode == NCRM_WIDTH_WISE)
12049 : {
12050 : // Enqueue all direct sub-groups.
12051 1411 : int nSubGroups = 0;
12052 1411 : int *panSubGroupIds = nullptr;
12053 1411 : NCDFGetSubGroups(*pnGroupId, &nSubGroups, &panSubGroupIds);
12054 1513 : for (int i = 0; i < nSubGroups; i++)
12055 102 : aoQueueGroupIdsToVisit.push(panSubGroupIds[i]);
12056 1411 : CPLFree(panSubGroupIds);
12057 : }
12058 : }
12059 :
12060 1522 : if (bMandatory)
12061 : {
12062 0 : char *pszStartGroupFullName = nullptr;
12063 0 : NCDFGetGroupFullName(nStartGroupId, &pszStartGroupFullName);
12064 0 : CPLError(CE_Failure, CPLE_AppDefined,
12065 : "Cannot resolve mandatory %s %s from group %s",
12066 : (pszVar ? pszVar : pszAtt),
12067 : (pszVar ? "variable" : "attribute"),
12068 0 : (pszStartGroupFullName ? pszStartGroupFullName : ""));
12069 0 : CPLFree(pszStartGroupFullName);
12070 : }
12071 :
12072 1522 : *pnGroupId = -1;
12073 1522 : *pnId = -1;
12074 1522 : return CE_Failure;
12075 : }
12076 :
12077 : // Resolve a variable name from a given starting group following the CF logic:
12078 : // - if var name is an absolute path then directly open it
12079 : // - first search in the starting group and its parent groups
12080 : // - then if there is no more parent group we switch to a width-wise search
12081 : // mode starting from the latest found parent group.
12082 : // The full CF logic is described here:
12083 : // https://github.com/diwg/cf2/blob/master/group/cf2-group.adoc#scope
12084 : // If bMandatory then print an error if resolving fails.
12085 : // TODO: implement support of relative paths.
12086 : // TODO: to follow strictly the CF logic, when searching for a coordinate
12087 : // variable, we must stop the parent search mode once the corresponding
12088 : // dimension is found and start the width-wise search from this group.
12089 : // TODO: to follow strictly the CF logic, when searching in width-wise mode
12090 : // we should skip every groups already visited during the parent
12091 : // search mode (but revisiting them should have no impact so we could
12092 : // let as it is if it is simpler...)
12093 : // TODO: CF specifies that the width-wise search order is "left-to-right" so
12094 : // maybe we must sort sibling groups alphabetically? but maybe not
12095 : // necessary if nc_inq_grps() already sort them?
12096 12966 : CPLErr NCDFResolveVar(int nStartGroupId, const char *pszVar, int *pnGroupId,
12097 : int *pnVarId, bool bMandatory)
12098 : {
12099 12966 : *pnGroupId = -1;
12100 12966 : *pnVarId = -1;
12101 12966 : int nGroupId = nStartGroupId, nVarId;
12102 12966 : if (pszVar[0] == '/')
12103 : {
12104 : // This is an absolute path: we can open the var directly.
12105 : int nRootGroupId;
12106 0 : ERR_RET(NCDFGetRootGroup(nStartGroupId, &nRootGroupId));
12107 0 : ERR_RET(NCDFOpenSubDataset(nRootGroupId, pszVar, &nGroupId, &nVarId));
12108 : }
12109 : else
12110 : {
12111 : // We have to search the variable following the CF logic.
12112 12966 : ERR_RET(NCDFResolveElem(nStartGroupId, pszVar, nullptr, &nGroupId,
12113 : &nVarId, bMandatory));
12114 : }
12115 11657 : *pnGroupId = nGroupId;
12116 11657 : *pnVarId = nVarId;
12117 11657 : return CE_None;
12118 : }
12119 :
12120 : // Like NCDFResolveVar but returns directly the var full name.
12121 1380 : static CPLErr NCDFResolveVarFullName(int nStartGroupId, const char *pszVar,
12122 : char **ppszFullName, bool bMandatory)
12123 : {
12124 1380 : *ppszFullName = nullptr;
12125 : int nGroupId, nVarId;
12126 1380 : ERR_RET(
12127 : NCDFResolveVar(nStartGroupId, pszVar, &nGroupId, &nVarId, bMandatory));
12128 1354 : return NCDFGetVarFullName(nGroupId, nVarId, ppszFullName);
12129 : }
12130 :
12131 : // Like NCDFResolveVar but resolves an attribute instead a variable and
12132 : // returns its integer value.
12133 : // Only GLOBAL attributes are supported for the moment.
12134 216 : static CPLErr NCDFResolveAttInt(int nStartGroupId, int nStartVarId,
12135 : const char *pszAtt, int *pnAtt, bool bMandatory)
12136 : {
12137 216 : int nGroupId = nStartGroupId, nAttId = nStartVarId;
12138 216 : ERR_RET(NCDFResolveElem(nStartGroupId, nullptr, pszAtt, &nGroupId, &nAttId,
12139 : bMandatory));
12140 3 : NCDF_ERR_RET(nc_get_att_int(nGroupId, NC_GLOBAL, pszAtt, pnAtt));
12141 3 : return CE_None;
12142 : }
12143 :
12144 : // Filter variables to keep only valid 2+D raster bands and vector fields in
12145 : // a given a NetCDF (or group) ID and its sub-groups.
12146 : // Coordinate or boundary variables are ignored.
12147 : // It also creates corresponding vector layers.
12148 525 : CPLErr netCDFDataset::FilterVars(
12149 : int nCdfId, bool bKeepRasters, bool bKeepVectors, char **papszIgnoreVars,
12150 : int *pnRasterVars, int *pnGroupId, int *pnVarId, int *pnIgnoredVars,
12151 : std::map<std::array<int, 3>, std::vector<std::pair<int, int>>>
12152 : &oMap2DDimsToGroupAndVar)
12153 : {
12154 525 : int nVars = 0;
12155 525 : int nRasterVars = 0;
12156 525 : NCDF_ERR(nc_inq(nCdfId, nullptr, &nVars, nullptr, nullptr));
12157 :
12158 1050 : std::vector<int> anPotentialVectorVarID;
12159 : // oMapDimIdToCount[x] = number of times dim x is the first dimension of
12160 : // potential vector variables
12161 1050 : std::map<int, int> oMapDimIdToCount;
12162 525 : int nVarXId = -1;
12163 525 : int nVarYId = -1;
12164 525 : int nVarZId = -1;
12165 525 : int nVarTimeId = -1;
12166 525 : int nVarTimeDimId = -1;
12167 525 : bool bIsVectorOnly = true;
12168 525 : int nProfileDimId = -1;
12169 525 : int nParentIndexVarID = -1;
12170 :
12171 3217 : for (int v = 0; v < nVars; v++)
12172 : {
12173 : int nVarDims;
12174 2692 : NCDF_ERR_RET(nc_inq_varndims(nCdfId, v, &nVarDims));
12175 : // Should we ignore this variable?
12176 : char szTemp[NC_MAX_NAME + 1];
12177 2692 : szTemp[0] = '\0';
12178 2692 : NCDF_ERR_RET(nc_inq_varname(nCdfId, v, szTemp));
12179 :
12180 2692 : if (strstr(szTemp, "_node_coordinates") ||
12181 2692 : strstr(szTemp, "_node_count"))
12182 : {
12183 : // Ignore CF-1.8 Simple Geometries helper variables
12184 69 : continue;
12185 : }
12186 :
12187 3917 : if (nVarDims == 1 && (NCDFIsVarLongitude(nCdfId, -1, szTemp) ||
12188 1294 : NCDFIsVarProjectionX(nCdfId, -1, szTemp)))
12189 : {
12190 358 : nVarXId = v;
12191 : }
12192 3201 : else if (nVarDims == 1 && (NCDFIsVarLatitude(nCdfId, -1, szTemp) ||
12193 936 : NCDFIsVarProjectionY(nCdfId, -1, szTemp)))
12194 : {
12195 358 : nVarYId = v;
12196 : }
12197 1907 : else if (nVarDims == 1 && NCDFIsVarVerticalCoord(nCdfId, -1, szTemp))
12198 : {
12199 78 : nVarZId = v;
12200 : }
12201 : else
12202 : {
12203 1829 : char *pszVarFullName = nullptr;
12204 1829 : CPLErr eErr = NCDFGetVarFullName(nCdfId, v, &pszVarFullName);
12205 1829 : if (eErr != CE_None)
12206 : {
12207 0 : CPLFree(pszVarFullName);
12208 0 : continue;
12209 : }
12210 : bool bIgnoreVar =
12211 1829 : (CSLFindString(papszIgnoreVars, pszVarFullName) != -1);
12212 1829 : CPLFree(pszVarFullName);
12213 1829 : if (bIgnoreVar)
12214 : {
12215 102 : if (nVarDims == 1 && NCDFIsVarTimeCoord(nCdfId, -1, szTemp))
12216 : {
12217 11 : nVarTimeId = v;
12218 11 : nc_inq_vardimid(nCdfId, v, &nVarTimeDimId);
12219 : }
12220 91 : else if (nVarDims > 1)
12221 : {
12222 87 : (*pnIgnoredVars)++;
12223 87 : CPLDebug("GDAL_netCDF", "variable #%d [%s] was ignored", v,
12224 : szTemp);
12225 : }
12226 : }
12227 : // Only accept 2+D vars.
12228 1727 : else if (nVarDims >= 2)
12229 : {
12230 704 : bool bRasterCandidate = true;
12231 : // Identify variables that might be vector variables
12232 704 : if (nVarDims == 2)
12233 : {
12234 630 : int anDimIds[2] = {-1, -1};
12235 630 : nc_inq_vardimid(nCdfId, v, anDimIds);
12236 :
12237 630 : nc_type vartype = NC_NAT;
12238 630 : nc_inq_vartype(nCdfId, v, &vartype);
12239 :
12240 : char szDimNameFirst[NC_MAX_NAME + 1];
12241 : char szDimNameSecond[NC_MAX_NAME + 1];
12242 630 : szDimNameFirst[0] = '\0';
12243 630 : szDimNameSecond[0] = '\0';
12244 1417 : if (vartype == NC_CHAR &&
12245 157 : nc_inq_dimname(nCdfId, anDimIds[0], szDimNameFirst) ==
12246 157 : NC_NOERR &&
12247 157 : nc_inq_dimname(nCdfId, anDimIds[1], szDimNameSecond) ==
12248 157 : NC_NOERR &&
12249 157 : !NCDFIsVarLongitude(nCdfId, -1, szDimNameSecond) &&
12250 157 : !NCDFIsVarProjectionX(nCdfId, -1, szDimNameSecond) &&
12251 944 : !NCDFIsVarLatitude(nCdfId, -1, szDimNameFirst) &&
12252 157 : !NCDFIsVarProjectionY(nCdfId, -1, szDimNameFirst))
12253 : {
12254 157 : anPotentialVectorVarID.push_back(v);
12255 157 : oMapDimIdToCount[anDimIds[0]]++;
12256 157 : if (strstr(szDimNameSecond, "_max_width"))
12257 : {
12258 127 : bRasterCandidate = false;
12259 : }
12260 : else
12261 : {
12262 30 : std::array<int, 3> oKey{anDimIds[0], anDimIds[1],
12263 30 : vartype};
12264 30 : oMap2DDimsToGroupAndVar[oKey].emplace_back(
12265 30 : std::pair(nCdfId, v));
12266 : }
12267 : }
12268 : else
12269 : {
12270 473 : std::array<int, 3> oKey{anDimIds[0], anDimIds[1],
12271 473 : vartype};
12272 473 : oMap2DDimsToGroupAndVar[oKey].emplace_back(
12273 473 : std::pair(nCdfId, v));
12274 473 : bIsVectorOnly = false;
12275 : }
12276 : }
12277 : else
12278 : {
12279 74 : bIsVectorOnly = false;
12280 : }
12281 704 : if (bKeepRasters && bRasterCandidate)
12282 : {
12283 548 : *pnGroupId = nCdfId;
12284 548 : *pnVarId = v;
12285 548 : nRasterVars++;
12286 : }
12287 : }
12288 1023 : else if (nVarDims == 1)
12289 : {
12290 728 : nc_type atttype = NC_NAT;
12291 728 : size_t attlen = 0;
12292 728 : if (nc_inq_att(nCdfId, v, "instance_dimension", &atttype,
12293 14 : &attlen) == NC_NOERR &&
12294 728 : atttype == NC_CHAR && attlen < NC_MAX_NAME)
12295 : {
12296 : char szInstanceDimension[NC_MAX_NAME + 1];
12297 14 : if (nc_get_att_text(nCdfId, v, "instance_dimension",
12298 14 : szInstanceDimension) == NC_NOERR)
12299 : {
12300 14 : szInstanceDimension[attlen] = 0;
12301 14 : int status = nc_inq_dimid(nCdfId, szInstanceDimension,
12302 : &nProfileDimId);
12303 14 : if (status == NC_NOERR)
12304 14 : nParentIndexVarID = v;
12305 : else
12306 0 : nProfileDimId = -1;
12307 14 : if (status == NC_EBADDIM)
12308 0 : CPLError(CE_Warning, CPLE_AppDefined,
12309 : "Attribute instance_dimension='%s' refers "
12310 : "to a non existing dimension",
12311 : szInstanceDimension);
12312 : else
12313 14 : NCDF_ERR(status);
12314 : }
12315 : }
12316 728 : if (v != nParentIndexVarID)
12317 : {
12318 714 : anPotentialVectorVarID.push_back(v);
12319 714 : int nDimId = -1;
12320 714 : nc_inq_vardimid(nCdfId, v, &nDimId);
12321 714 : oMapDimIdToCount[nDimId]++;
12322 : }
12323 : }
12324 : }
12325 : }
12326 :
12327 : // If we are opened in raster-only mode and that there are only 1D or 2D
12328 : // variables and that the 2D variables have no X/Y dim, and all
12329 : // variables refer to the same main dimension (or 2 dimensions for
12330 : // featureType=profile), then it is a pure vector dataset
12331 : CPLString osFeatureType(
12332 525 : CSLFetchNameValueDef(papszMetadata, "NC_GLOBAL#featureType", ""));
12333 414 : if (bKeepRasters && !bKeepVectors && bIsVectorOnly && nRasterVars > 0 &&
12334 939 : !anPotentialVectorVarID.empty() &&
12335 0 : (oMapDimIdToCount.size() == 1 ||
12336 0 : (EQUAL(osFeatureType, "profile") && oMapDimIdToCount.size() == 2 &&
12337 0 : nProfileDimId >= 0)))
12338 : {
12339 0 : anPotentialVectorVarID.resize(0);
12340 : }
12341 : else
12342 : {
12343 525 : *pnRasterVars += nRasterVars;
12344 : }
12345 :
12346 525 : if (!anPotentialVectorVarID.empty() && bKeepVectors)
12347 : {
12348 : // Take the dimension that is referenced the most times.
12349 64 : if (!(oMapDimIdToCount.size() == 1 ||
12350 27 : (EQUAL(osFeatureType, "profile") &&
12351 26 : oMapDimIdToCount.size() == 2 && nProfileDimId >= 0)))
12352 : {
12353 1 : CPLError(CE_Warning, CPLE_AppDefined,
12354 : "The dataset has several variables that could be "
12355 : "identified as vector fields, but not all share the same "
12356 : "primary dimension. Consequently they will be ignored.");
12357 : }
12358 : else
12359 : {
12360 50 : if (nVarTimeId >= 0 &&
12361 50 : oMapDimIdToCount.find(nVarTimeDimId) != oMapDimIdToCount.end())
12362 : {
12363 1 : anPotentialVectorVarID.push_back(nVarTimeId);
12364 : }
12365 49 : CreateGrpVectorLayers(nCdfId, osFeatureType, anPotentialVectorVarID,
12366 : oMapDimIdToCount, nVarXId, nVarYId, nVarZId,
12367 : nProfileDimId, nParentIndexVarID,
12368 : bKeepRasters);
12369 : }
12370 : }
12371 :
12372 : // Recurse on sub-groups.
12373 525 : int nSubGroups = 0;
12374 525 : int *panSubGroupIds = nullptr;
12375 525 : NCDFGetSubGroups(nCdfId, &nSubGroups, &panSubGroupIds);
12376 558 : for (int i = 0; i < nSubGroups; i++)
12377 : {
12378 33 : FilterVars(panSubGroupIds[i], bKeepRasters, bKeepVectors,
12379 : papszIgnoreVars, pnRasterVars, pnGroupId, pnVarId,
12380 : pnIgnoredVars, oMap2DDimsToGroupAndVar);
12381 : }
12382 525 : CPLFree(panSubGroupIds);
12383 :
12384 525 : return CE_None;
12385 : }
12386 :
12387 : // Create vector layers from given potentially identified vector variables
12388 : // resulting from the scanning of a NetCDF (or group) ID.
12389 49 : CPLErr netCDFDataset::CreateGrpVectorLayers(
12390 : int nCdfId, const CPLString &osFeatureType,
12391 : const std::vector<int> &anPotentialVectorVarID,
12392 : const std::map<int, int> &oMapDimIdToCount, int nVarXId, int nVarYId,
12393 : int nVarZId, int nProfileDimId, int nParentIndexVarID, bool bKeepRasters)
12394 : {
12395 49 : char *pszGroupName = nullptr;
12396 49 : NCDFGetGroupFullName(nCdfId, &pszGroupName);
12397 49 : if (pszGroupName == nullptr || pszGroupName[0] == '\0')
12398 : {
12399 47 : CPLFree(pszGroupName);
12400 47 : pszGroupName = CPLStrdup(CPLGetBasenameSafe(osFilename).c_str());
12401 : }
12402 49 : OGRwkbGeometryType eGType = wkbUnknown;
12403 : CPLString osLayerName = CSLFetchNameValueDef(
12404 98 : papszMetadata, "NC_GLOBAL#ogr_layer_name", pszGroupName);
12405 49 : CPLFree(pszGroupName);
12406 49 : papszMetadata =
12407 49 : CSLSetNameValue(papszMetadata, "NC_GLOBAL#ogr_layer_name", nullptr);
12408 :
12409 49 : if (EQUAL(osFeatureType, "point") || EQUAL(osFeatureType, "profile"))
12410 : {
12411 33 : papszMetadata =
12412 33 : CSLSetNameValue(papszMetadata, "NC_GLOBAL#featureType", nullptr);
12413 33 : eGType = wkbPoint;
12414 : }
12415 :
12416 : const char *pszLayerType =
12417 49 : CSLFetchNameValue(papszMetadata, "NC_GLOBAL#ogr_layer_type");
12418 49 : if (pszLayerType != nullptr)
12419 : {
12420 9 : eGType = OGRFromOGCGeomType(pszLayerType);
12421 9 : papszMetadata =
12422 9 : CSLSetNameValue(papszMetadata, "NC_GLOBAL#ogr_layer_type", nullptr);
12423 : }
12424 :
12425 : CPLString osGeometryField =
12426 98 : CSLFetchNameValueDef(papszMetadata, "NC_GLOBAL#ogr_geometry_field", "");
12427 49 : papszMetadata =
12428 49 : CSLSetNameValue(papszMetadata, "NC_GLOBAL#ogr_geometry_field", nullptr);
12429 :
12430 49 : int nFirstVarId = -1;
12431 49 : int nVectorDim = oMapDimIdToCount.rbegin()->first;
12432 49 : if (EQUAL(osFeatureType, "profile") && oMapDimIdToCount.size() == 2)
12433 : {
12434 13 : if (nVectorDim == nProfileDimId)
12435 0 : nVectorDim = oMapDimIdToCount.begin()->first;
12436 : }
12437 : else
12438 : {
12439 36 : nProfileDimId = -1;
12440 : }
12441 62 : for (size_t j = 0; j < anPotentialVectorVarID.size(); j++)
12442 : {
12443 62 : int anDimIds[2] = {-1, -1};
12444 62 : nc_inq_vardimid(nCdfId, anPotentialVectorVarID[j], anDimIds);
12445 62 : if (nVectorDim == anDimIds[0])
12446 : {
12447 49 : nFirstVarId = anPotentialVectorVarID[j];
12448 49 : break;
12449 : }
12450 : }
12451 :
12452 : // In case where coordinates are explicitly specified for one of the
12453 : // field/variable, use them in priority over the ones that might have been
12454 : // identified above.
12455 49 : char *pszCoordinates = nullptr;
12456 49 : if (NCDFGetAttr(nCdfId, nFirstVarId, "coordinates", &pszCoordinates) ==
12457 : CE_None)
12458 : {
12459 34 : char **papszTokens = NCDFTokenizeCoordinatesAttribute(pszCFCoordinates);
12460 34 : for (int i = 0; papszTokens != nullptr && papszTokens[i] != nullptr;
12461 : i++)
12462 : {
12463 0 : if (NCDFIsVarLongitude(nCdfId, -1, papszTokens[i]) ||
12464 0 : NCDFIsVarProjectionX(nCdfId, -1, papszTokens[i]))
12465 : {
12466 0 : nVarXId = -1;
12467 0 : CPL_IGNORE_RET_VAL(
12468 0 : nc_inq_varid(nCdfId, papszTokens[i], &nVarXId));
12469 : }
12470 0 : else if (NCDFIsVarLatitude(nCdfId, -1, papszTokens[i]) ||
12471 0 : NCDFIsVarProjectionY(nCdfId, -1, papszTokens[i]))
12472 : {
12473 0 : nVarYId = -1;
12474 0 : CPL_IGNORE_RET_VAL(
12475 0 : nc_inq_varid(nCdfId, papszTokens[i], &nVarYId));
12476 : }
12477 0 : else if (NCDFIsVarVerticalCoord(nCdfId, -1, papszTokens[i]))
12478 : {
12479 0 : nVarZId = -1;
12480 0 : CPL_IGNORE_RET_VAL(
12481 0 : nc_inq_varid(nCdfId, papszTokens[i], &nVarZId));
12482 : }
12483 : }
12484 34 : CSLDestroy(papszTokens);
12485 : }
12486 49 : CPLFree(pszCoordinates);
12487 :
12488 : // Check that the X,Y,Z vars share 1D and share the same dimension as
12489 : // attribute variables.
12490 49 : if (nVarXId >= 0 && nVarYId >= 0)
12491 : {
12492 38 : int nVarDimCount = -1;
12493 38 : int nVarDimId = -1;
12494 38 : if (nc_inq_varndims(nCdfId, nVarXId, &nVarDimCount) != NC_NOERR ||
12495 38 : nVarDimCount != 1 ||
12496 38 : nc_inq_vardimid(nCdfId, nVarXId, &nVarDimId) != NC_NOERR ||
12497 38 : nVarDimId != ((nProfileDimId >= 0) ? nProfileDimId : nVectorDim) ||
12498 35 : nc_inq_varndims(nCdfId, nVarYId, &nVarDimCount) != NC_NOERR ||
12499 35 : nVarDimCount != 1 ||
12500 111 : nc_inq_vardimid(nCdfId, nVarYId, &nVarDimId) != NC_NOERR ||
12501 35 : nVarDimId != ((nProfileDimId >= 0) ? nProfileDimId : nVectorDim))
12502 : {
12503 3 : nVarXId = nVarYId = -1;
12504 : }
12505 69 : else if (nVarZId >= 0 &&
12506 34 : (nc_inq_varndims(nCdfId, nVarZId, &nVarDimCount) != NC_NOERR ||
12507 34 : nVarDimCount != 1 ||
12508 34 : nc_inq_vardimid(nCdfId, nVarZId, &nVarDimId) != NC_NOERR ||
12509 34 : nVarDimId != nVectorDim))
12510 : {
12511 0 : nVarZId = -1;
12512 : }
12513 : }
12514 :
12515 49 : if (eGType == wkbUnknown && nVarXId >= 0 && nVarYId >= 0)
12516 : {
12517 2 : eGType = wkbPoint;
12518 : }
12519 49 : if (eGType == wkbPoint && nVarXId >= 0 && nVarYId >= 0 && nVarZId >= 0)
12520 : {
12521 34 : eGType = wkbPoint25D;
12522 : }
12523 49 : if (eGType == wkbUnknown && osGeometryField.empty())
12524 : {
12525 5 : eGType = wkbNone;
12526 : }
12527 :
12528 : // Read projection info
12529 49 : char **papszMetadataBackup = CSLDuplicate(papszMetadata);
12530 49 : ReadAttributes(nCdfId, nFirstVarId);
12531 49 : if (!this->bSGSupport)
12532 49 : SetProjectionFromVar(nCdfId, nFirstVarId, true);
12533 49 : const char *pszValue = FetchAttr(nCdfId, nFirstVarId, CF_GRD_MAPPING);
12534 49 : char *pszGridMapping = (pszValue ? CPLStrdup(pszValue) : nullptr);
12535 49 : CSLDestroy(papszMetadata);
12536 49 : papszMetadata = papszMetadataBackup;
12537 :
12538 49 : OGRSpatialReference *poSRS = nullptr;
12539 49 : if (!m_oSRS.IsEmpty())
12540 : {
12541 21 : poSRS = m_oSRS.Clone();
12542 : }
12543 : // Reset if there's a 2D raster
12544 49 : m_bHasProjection = false;
12545 49 : m_bHasGeoTransform = false;
12546 :
12547 49 : if (!bKeepRasters)
12548 : {
12549 : // Strip out uninteresting metadata.
12550 45 : papszMetadata =
12551 45 : CSLSetNameValue(papszMetadata, "NC_GLOBAL#Conventions", nullptr);
12552 45 : papszMetadata =
12553 45 : CSLSetNameValue(papszMetadata, "NC_GLOBAL#GDAL", nullptr);
12554 45 : papszMetadata =
12555 45 : CSLSetNameValue(papszMetadata, "NC_GLOBAL#history", nullptr);
12556 : }
12557 :
12558 : std::shared_ptr<netCDFLayer> poLayer(
12559 49 : new netCDFLayer(this, nCdfId, osLayerName, eGType, poSRS));
12560 49 : if (poSRS != nullptr)
12561 21 : poSRS->Release();
12562 49 : poLayer->SetRecordDimID(nVectorDim);
12563 49 : if (wkbFlatten(eGType) == wkbPoint && nVarXId >= 0 && nVarYId >= 0)
12564 : {
12565 35 : poLayer->SetXYZVars(nVarXId, nVarYId, nVarZId);
12566 : }
12567 14 : else if (!osGeometryField.empty())
12568 : {
12569 9 : poLayer->SetWKTGeometryField(osGeometryField);
12570 : }
12571 49 : if (pszGridMapping != nullptr)
12572 : {
12573 21 : poLayer->SetGridMapping(pszGridMapping);
12574 21 : CPLFree(pszGridMapping);
12575 : }
12576 49 : poLayer->SetProfile(nProfileDimId, nParentIndexVarID);
12577 :
12578 574 : for (size_t j = 0; j < anPotentialVectorVarID.size(); j++)
12579 : {
12580 525 : int anDimIds[2] = {-1, -1};
12581 525 : nc_inq_vardimid(nCdfId, anPotentialVectorVarID[j], anDimIds);
12582 525 : if (anDimIds[0] == nVectorDim ||
12583 24 : (nProfileDimId >= 0 && anDimIds[0] == nProfileDimId))
12584 : {
12585 : #ifdef NCDF_DEBUG
12586 : char szTemp2[NC_MAX_NAME + 1] = {};
12587 : CPL_IGNORE_RET_VAL(
12588 : nc_inq_varname(nCdfId, anPotentialVectorVarID[j], szTemp2));
12589 : CPLDebug("GDAL_netCDF", "Variable %s is a vector field", szTemp2);
12590 : #endif
12591 525 : poLayer->AddField(anPotentialVectorVarID[j]);
12592 : }
12593 : }
12594 :
12595 49 : if (poLayer->GetLayerDefn()->GetFieldCount() != 0 ||
12596 0 : poLayer->GetGeomType() != wkbNone)
12597 : {
12598 49 : papoLayers.push_back(poLayer);
12599 : }
12600 :
12601 98 : return CE_None;
12602 : }
12603 :
12604 : // Get all coordinate and boundary variables full names referenced in
12605 : // a given a NetCDF (or group) ID and its sub-groups.
12606 : // These variables are identified in other variable's
12607 : // "coordinates" and "bounds" attribute.
12608 : // Searching coordinate and boundary variables may need to explore
12609 : // parents groups (or other groups in case of reference given in form of an
12610 : // absolute path).
12611 : // See CF sections 5.2, 5.6 and 7.1
12612 526 : static CPLErr NCDFGetCoordAndBoundVarFullNames(int nCdfId, char ***ppapszVars)
12613 : {
12614 526 : int nVars = 0;
12615 526 : NCDF_ERR(nc_inq(nCdfId, nullptr, &nVars, nullptr, nullptr));
12616 :
12617 3232 : for (int v = 0; v < nVars; v++)
12618 : {
12619 2706 : char *pszTemp = nullptr;
12620 2706 : char **papszTokens = nullptr;
12621 2706 : if (NCDFGetAttr(nCdfId, v, "coordinates", &pszTemp) == CE_None)
12622 445 : papszTokens = NCDFTokenizeCoordinatesAttribute(pszTemp);
12623 2706 : CPLFree(pszTemp);
12624 2706 : pszTemp = nullptr;
12625 2706 : if (NCDFGetAttr(nCdfId, v, "bounds", &pszTemp) == CE_None &&
12626 2706 : pszTemp != nullptr && !EQUAL(pszTemp, ""))
12627 17 : papszTokens = CSLAddString(papszTokens, pszTemp);
12628 2706 : CPLFree(pszTemp);
12629 3992 : for (int i = 0; papszTokens != nullptr && papszTokens[i] != nullptr;
12630 : i++)
12631 : {
12632 1286 : char *pszVarFullName = nullptr;
12633 1286 : if (NCDFResolveVarFullName(nCdfId, papszTokens[i],
12634 1286 : &pszVarFullName) == CE_None)
12635 1260 : *ppapszVars = CSLAddString(*ppapszVars, pszVarFullName);
12636 1286 : CPLFree(pszVarFullName);
12637 : }
12638 2706 : CSLDestroy(papszTokens);
12639 : }
12640 :
12641 : // Recurse on sub-groups.
12642 : int nSubGroups;
12643 526 : int *panSubGroupIds = nullptr;
12644 526 : NCDFGetSubGroups(nCdfId, &nSubGroups, &panSubGroupIds);
12645 559 : for (int i = 0; i < nSubGroups; i++)
12646 : {
12647 33 : NCDFGetCoordAndBoundVarFullNames(panSubGroupIds[i], ppapszVars);
12648 : }
12649 526 : CPLFree(panSubGroupIds);
12650 :
12651 526 : return CE_None;
12652 : }
12653 :
12654 : // Check if give type is user defined
12655 1520 : bool NCDFIsUserDefinedType(int /*ncid*/, int type)
12656 : {
12657 1520 : return type >= NC_FIRSTUSERTYPEID;
12658 : }
12659 :
12660 558 : char **NCDFTokenizeCoordinatesAttribute(const char *pszCoordinates)
12661 : {
12662 : // CF conventions use space as the separator for variable names in the
12663 : // coordinates attribute, but some products such as
12664 : // https://sentinel.esa.int/web/sentinel/technical-guides/sentinel-3-synergy/products-algorithms/level-2-aod-algorithms-and-products/level-2-aod-products-description
12665 : // use comma.
12666 558 : return CSLTokenizeString2(pszCoordinates, ", ", 0);
12667 : }
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