forked from OSGeo/gdal
-
Notifications
You must be signed in to change notification settings - Fork 0
/
gdalapplyverticalshiftgrid.cpp
664 lines (592 loc) · 24.7 KB
/
gdalapplyverticalshiftgrid.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
/******************************************************************************
*
* Project: GDAL algorithms
* Purpose: Apply vertical shift grid
* Author: Even Rouault, even.rouault at spatialys.com
*
******************************************************************************
* Copyright (c) 2017, Even Rouault <even.rouault at spatialys.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
****************************************************************************/
#include "cpl_string.h"
#include "gdal.h"
#include "gdal_alg.h"
#include "gdal_alg_priv.h"
#include "gdal_priv.h"
#include "gdal_utils.h"
#include "gdalwarper.h"
#include "vrtdataset.h"
#include "ogr_spatialref.h"
#include "proj.h"
#include <limits>
CPL_CVSID("$Id$")
/************************************************************************/
/* GDALApplyVSGDataset */
/************************************************************************/
class GDALApplyVSGDataset final : public GDALDataset
{
friend class GDALApplyVSGRasterBand;
GDALDataset *m_poSrcDataset = nullptr;
GDALDataset *m_poReprojectedGrid = nullptr;
bool m_bInverse = false;
double m_dfSrcUnitToMeter = 0.0;
double m_dfDstUnitToMeter = 0.0;
CPL_DISALLOW_COPY_ASSIGN(GDALApplyVSGDataset)
public:
GDALApplyVSGDataset(GDALDataset *poSrcDataset,
GDALDataset *poReprojectedGrid, GDALDataType eDT,
bool bInverse, double dfSrcUnitToMeter,
double dfDstUnitToMeter, int nBlockSize);
virtual ~GDALApplyVSGDataset();
virtual int CloseDependentDatasets() override;
virtual CPLErr GetGeoTransform(double *padfGeoTransform) override;
virtual const OGRSpatialReference *GetSpatialRef() const override;
bool IsInitOK();
};
/************************************************************************/
/* GDALApplyVSGRasterBand */
/************************************************************************/
class GDALApplyVSGRasterBand final : public GDALRasterBand
{
friend class GDALApplyVSGDataset;
float *m_pafSrcData = nullptr;
float *m_pafGridData = nullptr;
CPL_DISALLOW_COPY_ASSIGN(GDALApplyVSGRasterBand)
public:
GDALApplyVSGRasterBand(GDALDataType eDT, int nBlockSize);
virtual ~GDALApplyVSGRasterBand();
virtual CPLErr IReadBlock(int nBlockXOff, int nBlockYOff,
void *pData) override;
virtual double GetNoDataValue(int *pbSuccess) override;
};
/************************************************************************/
/* GDALApplyVSGDataset() */
/************************************************************************/
GDALApplyVSGDataset::GDALApplyVSGDataset(GDALDataset *poSrcDataset,
GDALDataset *poReprojectedGrid,
GDALDataType eDT, bool bInverse,
double dfSrcUnitToMeter,
double dfDstUnitToMeter,
int nBlockSize)
: m_poSrcDataset(poSrcDataset), m_poReprojectedGrid(poReprojectedGrid),
m_bInverse(bInverse), m_dfSrcUnitToMeter(dfSrcUnitToMeter),
m_dfDstUnitToMeter(dfDstUnitToMeter)
{
m_poSrcDataset->Reference();
m_poReprojectedGrid->Reference();
nRasterXSize = poSrcDataset->GetRasterXSize();
nRasterYSize = poSrcDataset->GetRasterYSize();
SetBand(1, new GDALApplyVSGRasterBand(eDT, nBlockSize));
}
/************************************************************************/
/* ~GDALApplyVSGDataset() */
/************************************************************************/
GDALApplyVSGDataset::~GDALApplyVSGDataset()
{
GDALApplyVSGDataset::CloseDependentDatasets();
}
/************************************************************************/
/* CloseDependentDatasets() */
/************************************************************************/
int GDALApplyVSGDataset::CloseDependentDatasets()
{
bool bRet = false;
if (m_poSrcDataset != nullptr)
{
if (m_poSrcDataset->ReleaseRef())
{
bRet = true;
}
m_poSrcDataset = nullptr;
}
if (m_poReprojectedGrid != nullptr)
{
if (m_poReprojectedGrid->ReleaseRef())
{
bRet = true;
}
m_poReprojectedGrid = nullptr;
}
return bRet;
}
/************************************************************************/
/* GetGeoTransform() */
/************************************************************************/
CPLErr GDALApplyVSGDataset::GetGeoTransform(double *padfGeoTransform)
{
return m_poSrcDataset->GetGeoTransform(padfGeoTransform);
}
/************************************************************************/
/* GetSpatialRef() */
/************************************************************************/
const OGRSpatialReference *GDALApplyVSGDataset::GetSpatialRef() const
{
return m_poSrcDataset->GetSpatialRef();
}
/************************************************************************/
/* IsInitOK() */
/************************************************************************/
bool GDALApplyVSGDataset::IsInitOK()
{
GDALApplyVSGRasterBand *poBand =
reinterpret_cast<GDALApplyVSGRasterBand *>(GetRasterBand(1));
return poBand->m_pafSrcData != nullptr && poBand->m_pafGridData != nullptr;
}
/************************************************************************/
/* GDALApplyVSGRasterBand() */
/************************************************************************/
GDALApplyVSGRasterBand::GDALApplyVSGRasterBand(GDALDataType eDT, int nBlockSize)
{
eDataType = eDT;
nBlockXSize = nBlockSize;
nBlockYSize = nBlockSize;
m_pafSrcData = static_cast<float *>(
VSI_MALLOC3_VERBOSE(nBlockXSize, nBlockYSize, sizeof(float)));
m_pafGridData = static_cast<float *>(
VSI_MALLOC3_VERBOSE(nBlockXSize, nBlockYSize, sizeof(float)));
}
/************************************************************************/
/* ~GDALApplyVSGRasterBand() */
/************************************************************************/
GDALApplyVSGRasterBand::~GDALApplyVSGRasterBand()
{
VSIFree(m_pafSrcData);
VSIFree(m_pafGridData);
}
/************************************************************************/
/* GetNoDataValue() */
/************************************************************************/
double GDALApplyVSGRasterBand::GetNoDataValue(int *pbSuccess)
{
GDALApplyVSGDataset *poGDS = reinterpret_cast<GDALApplyVSGDataset *>(poDS);
return poGDS->m_poSrcDataset->GetRasterBand(1)->GetNoDataValue(pbSuccess);
}
/************************************************************************/
/* IReadBlock() */
/************************************************************************/
CPLErr GDALApplyVSGRasterBand::IReadBlock(int nBlockXOff, int nBlockYOff,
void *pData)
{
GDALApplyVSGDataset *poGDS = reinterpret_cast<GDALApplyVSGDataset *>(poDS);
const int nXOff = nBlockXOff * nBlockXSize;
const int nReqXSize = (nXOff > nRasterXSize - nBlockXSize)
? nRasterXSize - nXOff
: nBlockXSize;
const int nYOff = nBlockYOff * nBlockYSize;
const int nReqYSize = (nYOff > nRasterYSize - nBlockYSize)
? nRasterYSize - nYOff
: nBlockYSize;
CPLErr eErr = poGDS->m_poSrcDataset->GetRasterBand(1)->RasterIO(
GF_Read, nXOff, nYOff, nReqXSize, nReqYSize, m_pafSrcData, nReqXSize,
nReqYSize, GDT_Float32, sizeof(float), nBlockXSize * sizeof(float),
nullptr);
if (eErr == CE_None)
eErr = poGDS->m_poReprojectedGrid->GetRasterBand(1)->RasterIO(
GF_Read, nXOff, nYOff, nReqXSize, nReqYSize, m_pafGridData,
nReqXSize, nReqYSize, GDT_Float32, sizeof(float),
nBlockXSize * sizeof(float), nullptr);
if (eErr == CE_None)
{
const int nDTSize = GDALGetDataTypeSizeBytes(eDataType);
int bHasNoData = FALSE;
float fNoDataValue = static_cast<float>(GetNoDataValue(&bHasNoData));
for (int iY = 0; iY < nReqYSize; iY++)
{
for (int iX = 0; iX < nReqXSize; iX++)
{
const float fSrcVal = m_pafSrcData[iY * nBlockXSize + iX];
const float fGridVal = m_pafGridData[iY * nBlockXSize + iX];
if (bHasNoData && fSrcVal == fNoDataValue)
{
}
else if (CPLIsInf(fGridVal))
{
CPLError(CE_Failure, CPLE_AppDefined,
"Missing vertical grid value at source (%d,%d)",
nXOff + iX, nYOff + iY);
return CE_Failure;
}
else if (poGDS->m_bInverse)
{
m_pafSrcData[iY * nBlockXSize + iX] = static_cast<float>(
(fSrcVal * poGDS->m_dfSrcUnitToMeter - fGridVal) /
poGDS->m_dfDstUnitToMeter);
}
else
{
m_pafSrcData[iY * nBlockXSize + iX] = static_cast<float>(
(fSrcVal * poGDS->m_dfSrcUnitToMeter + fGridVal) /
poGDS->m_dfDstUnitToMeter);
}
}
GDALCopyWords(
m_pafSrcData + iY * nBlockXSize, GDT_Float32, sizeof(float),
static_cast<GByte *>(pData) + iY * nBlockXSize * nDTSize,
eDataType, nDTSize, nReqXSize);
}
}
return eErr;
}
/************************************************************************/
/* GDALApplyVerticalShiftGrid() */
/************************************************************************/
/** Apply a vertical shift grid to a source (DEM typically) dataset.
*
* hGridDataset will typically use WGS84 as horizontal datum (but this is
* not a requirement) and its values are the values to add to go from geoid
* elevations to WGS84 ellipsoidal heights.
*
* hGridDataset will be on-the-fly reprojected and resampled to the projection
* and resolution of hSrcDataset, using bilinear resampling by default.
*
* Both hSrcDataset and hGridDataset must be single band datasets, and have
* a valid geotransform and projection.
*
* On success, a reference will be taken on hSrcDataset and hGridDataset.
* Reference counting semantics on the source and grid datasets should be
* honoured. That is, don't just GDALClose() it, unless it was opened with
* GDALOpenShared(), but rather use GDALReleaseDataset() if wanting to
* immediately release the reference(s) and make the returned dataset the
* owner of them.
*
* Valid use cases:
*
* \code
* hSrcDataset = GDALOpen(...)
* hGridDataset = GDALOpen(...)
* hDstDataset = GDALApplyVerticalShiftGrid(hSrcDataset, hGridDataset, ...)
* GDALReleaseDataset(hSrcDataset);
* GDALReleaseDataset(hGridDataset);
* if( hDstDataset )
* {
* // Do things with hDstDataset
* GDALClose(hDstDataset) // will close hSrcDataset and hGridDataset
* }
* \endcode
*
* @param hSrcDataset source (DEM) dataset. Must not be NULL.
* @param hGridDataset vertical grid shift dataset. Must not be NULL.
* @param bInverse if set to FALSE, hGridDataset values will be added to
* hSrcDataset. If set to TRUE, they will be subtracted.
* @param dfSrcUnitToMeter the factor to convert values from hSrcDataset to
* meters (1.0 if source values are in meter).
* @param dfDstUnitToMeter the factor to convert shifted values from meter
* (1.0 if output values must be in meter).
* @param papszOptions list of options, or NULL. Supported options are:
* <ul>
* <li>RESAMPLING=NEAREST/BILINEAR/CUBIC. Defaults to BILINEAR.</li>
* <li>MAX_ERROR=val. Maximum error measured in input pixels that is allowed in
* approximating the transformation (0.0 for exact calculations). Defaults
* to 0.125</li>
* <li>DATATYPE=Byte/UInt16/Int16/Float32/Float64. Output data type. If not
* specified will be the same as the one of hSrcDataset.
* <li>ERROR_ON_MISSING_VERT_SHIFT=YES/NO. Whether a missing/nodata value in
* hGridDataset should cause I/O requests to fail. Default is NO (in which case
* 0 will be used)
* <li>SRC_SRS=srs_def. Override projection on hSrcDataset;
* </ul>
*
* @return a new dataset corresponding to hSrcDataset adjusted with
* hGridDataset, or NULL. If not NULL, it must be closed with GDALClose().
*
* @since GDAL 2.2
* @deprecated GDAL 3.4. Will be removed in GDAL 4.0. This function was used
* by gdalwarp initially, but is no longer needed.
*/
GDALDatasetH GDALApplyVerticalShiftGrid(GDALDatasetH hSrcDataset,
GDALDatasetH hGridDataset, int bInverse,
double dfSrcUnitToMeter,
double dfDstUnitToMeter,
const char *const *papszOptions)
{
VALIDATE_POINTER1(hSrcDataset, "GDALApplyVerticalShiftGrid", nullptr);
VALIDATE_POINTER1(hGridDataset, "GDALApplyVerticalShiftGrid", nullptr);
double adfSrcGT[6];
if (GDALGetGeoTransform(hSrcDataset, adfSrcGT) != CE_None)
{
CPLError(CE_Failure, CPLE_NotSupported,
"Source dataset has no geotransform.");
return nullptr;
}
const char *pszSrcProjection = CSLFetchNameValue(papszOptions, "SRC_SRS");
OGRSpatialReference oSrcSRS;
if (pszSrcProjection != nullptr && pszSrcProjection[0] != '\0')
{
oSrcSRS.SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
oSrcSRS.SetFromUserInput(pszSrcProjection);
}
else
{
auto poSRS = GDALDataset::FromHandle(hSrcDataset)->GetSpatialRef();
if (poSRS)
oSrcSRS = *poSRS;
}
if (oSrcSRS.IsCompound())
{
oSrcSRS.StripVertical();
}
if (oSrcSRS.IsEmpty())
{
CPLError(CE_Failure, CPLE_NotSupported,
"Source dataset has no projection.");
return nullptr;
}
if (GDALGetRasterCount(hSrcDataset) != 1)
{
CPLError(CE_Failure, CPLE_NotSupported,
"Only single band source dataset is supported.");
return nullptr;
}
double adfGridGT[6];
if (GDALGetGeoTransform(hGridDataset, adfGridGT) != CE_None)
{
CPLError(CE_Failure, CPLE_NotSupported,
"Grid dataset has no geotransform.");
return nullptr;
}
OGRSpatialReferenceH hGridSRS = GDALGetSpatialRef(hGridDataset);
if (hGridSRS == nullptr)
{
CPLError(CE_Failure, CPLE_NotSupported,
"Grid dataset has no projection.");
return nullptr;
}
if (GDALGetRasterCount(hGridDataset) != 1)
{
CPLError(CE_Failure, CPLE_NotSupported,
"Only single band grid dataset is supported.");
return nullptr;
}
GDALDataType eDT = GDALGetRasterDataType(GDALGetRasterBand(hSrcDataset, 1));
const char *pszDataType = CSLFetchNameValue(papszOptions, "DATATYPE");
if (pszDataType)
eDT = GDALGetDataTypeByName(pszDataType);
if (eDT == GDT_Unknown)
{
CPLError(CE_Failure, CPLE_NotSupported, "Invalid DATATYPE=%s",
pszDataType);
return nullptr;
}
const int nSrcXSize = GDALGetRasterXSize(hSrcDataset);
const int nSrcYSize = GDALGetRasterYSize(hSrcDataset);
double dfWestLongitudeDeg = 0.0;
double dfSouthLatitudeDeg = 0.0;
double dfEastLongitudeDeg = 0.0;
double dfNorthLatitudeDeg = 0.0;
GDALComputeAreaOfInterest(&oSrcSRS, adfSrcGT, nSrcXSize, nSrcYSize,
dfWestLongitudeDeg, dfSouthLatitudeDeg,
dfEastLongitudeDeg, dfNorthLatitudeDeg);
CPLStringList aosOptions;
if (!(dfWestLongitudeDeg == 0.0 && dfSouthLatitudeDeg == 0.0 &&
dfEastLongitudeDeg == 0.0 && dfNorthLatitudeDeg == 0.0))
{
aosOptions.SetNameValue(
"AREA_OF_INTEREST",
CPLSPrintf("%.16g,%.16g,%.16g,%.16g", dfWestLongitudeDeg,
dfSouthLatitudeDeg, dfEastLongitudeDeg,
dfNorthLatitudeDeg));
}
void *hTransform = GDALCreateGenImgProjTransformer4(
hGridSRS, adfGridGT, OGRSpatialReference::ToHandle(&oSrcSRS), adfSrcGT,
aosOptions.List());
if (hTransform == nullptr)
return nullptr;
GDALWarpOptions *psWO = GDALCreateWarpOptions();
psWO->hSrcDS = hGridDataset;
psWO->eResampleAlg = GRA_Bilinear;
const char *pszResampling = CSLFetchNameValue(papszOptions, "RESAMPLING");
if (pszResampling)
{
if (EQUAL(pszResampling, "NEAREST"))
psWO->eResampleAlg = GRA_NearestNeighbour;
else if (EQUAL(pszResampling, "BILINEAR"))
psWO->eResampleAlg = GRA_Bilinear;
else if (EQUAL(pszResampling, "CUBIC"))
psWO->eResampleAlg = GRA_Cubic;
}
psWO->eWorkingDataType = GDT_Float32;
int bHasNoData = FALSE;
const double dfSrcNoData = GDALGetRasterNoDataValue(
GDALGetRasterBand(hGridDataset, 1), &bHasNoData);
if (bHasNoData)
{
psWO->padfSrcNoDataReal =
static_cast<double *>(CPLMalloc(sizeof(double)));
psWO->padfSrcNoDataReal[0] = dfSrcNoData;
}
psWO->padfDstNoDataReal = static_cast<double *>(CPLMalloc(sizeof(double)));
const bool bErrorOnMissingShift =
CPLFetchBool(papszOptions, "ERROR_ON_MISSING_VERT_SHIFT", false);
psWO->padfDstNoDataReal[0] =
(bErrorOnMissingShift) ? -std::numeric_limits<float>::infinity() : 0.0;
psWO->papszWarpOptions =
CSLSetNameValue(psWO->papszWarpOptions, "INIT_DEST", "NO_DATA");
psWO->pfnTransformer = GDALGenImgProjTransform;
psWO->pTransformerArg = hTransform;
const double dfMaxError =
CPLAtof(CSLFetchNameValueDef(papszOptions, "MAX_ERROR", "0.125"));
if (dfMaxError > 0.0)
{
psWO->pTransformerArg = GDALCreateApproxTransformer(
psWO->pfnTransformer, psWO->pTransformerArg, dfMaxError);
psWO->pfnTransformer = GDALApproxTransform;
GDALApproxTransformerOwnsSubtransformer(psWO->pTransformerArg, TRUE);
}
psWO->nBandCount = 1;
psWO->panSrcBands = static_cast<int *>(CPLMalloc(sizeof(int)));
psWO->panSrcBands[0] = 1;
psWO->panDstBands = static_cast<int *>(CPLMalloc(sizeof(int)));
psWO->panDstBands[0] = 1;
VRTWarpedDataset *poReprojectedGrid =
new VRTWarpedDataset(nSrcXSize, nSrcYSize);
// This takes a reference on hGridDataset
CPLErr eErr = poReprojectedGrid->Initialize(psWO);
CPLAssert(eErr == CE_None);
CPL_IGNORE_RET_VAL(eErr);
GDALDestroyWarpOptions(psWO);
poReprojectedGrid->SetGeoTransform(adfSrcGT);
poReprojectedGrid->AddBand(GDT_Float32, nullptr);
GDALApplyVSGDataset *poOutDS = new GDALApplyVSGDataset(
GDALDataset::FromHandle(hSrcDataset), poReprojectedGrid, eDT,
CPL_TO_BOOL(bInverse), dfSrcUnitToMeter, dfDstUnitToMeter,
// Undocumented option. For testing only
atoi(CSLFetchNameValueDef(papszOptions, "BLOCKSIZE", "256")));
poReprojectedGrid->ReleaseRef();
if (!poOutDS->IsInitOK())
{
delete poOutDS;
return nullptr;
}
poOutDS->SetDescription(GDALGetDescription(hSrcDataset));
return reinterpret_cast<GDALDatasetH>(poOutDS);
}
/************************************************************************/
/* GetProj4Filename() */
/************************************************************************/
static CPLString GetProj4Filename(const char *pszFilename)
{
CPLString osFilename;
/* or fixed path: /name, ./name or ../name */
if (!CPLIsFilenameRelative(pszFilename) || *pszFilename == '.')
{
return pszFilename;
}
PJ_GRID_INFO info = proj_grid_info(pszFilename);
if (info.filename[0])
{
osFilename = info.filename;
}
return osFilename;
}
/************************************************************************/
/* GDALOpenVerticalShiftGrid() */
/************************************************************************/
/** Load proj.4 geoidgrids as GDAL dataset
*
* @param pszProj4Geoidgrids Value of proj.4 geoidgrids parameter.
* @param pbError If not NULL, the pointed value will be set to TRUE if an
* error occurred.
*
* @return a dataset. If not NULL, it must be closed with GDALClose().
*
* @since GDAL 2.2
* @deprecated GDAL 3.4. Will be removed in GDAL 4.0. This function was used
* by gdalwarp initially, but is no longer needed.
*/
GDALDatasetH GDALOpenVerticalShiftGrid(const char *pszProj4Geoidgrids,
int *pbError)
{
char **papszGrids = CSLTokenizeString2(pszProj4Geoidgrids, ",", 0);
const int nGridCount = CSLCount(papszGrids);
if (nGridCount == 1)
{
CSLDestroy(papszGrids);
bool bMissingOk = false;
if (*pszProj4Geoidgrids == '@')
{
pszProj4Geoidgrids++;
bMissingOk = true;
}
const CPLString osFilename(GetProj4Filename(pszProj4Geoidgrids));
const char *const papszOpenOptions[] = {
"@SHIFT_ORIGIN_IN_MINUS_180_PLUS_180=YES", nullptr};
GDALDatasetH hDS =
GDALOpenEx(osFilename, 0, nullptr, papszOpenOptions, nullptr);
if (hDS == nullptr)
{
CPLDebug("GDAL", "Cannot find file corresponding to %s",
pszProj4Geoidgrids);
}
if (pbError)
*pbError = (!bMissingOk && hDS == nullptr);
return hDS;
}
CPLStringList aosFilenames;
for (int i = nGridCount - 1; i >= 0; i--)
{
const char *pszName = papszGrids[i];
bool bMissingOk = false;
if (*pszName == '@')
{
pszName++;
bMissingOk = true;
}
const CPLString osFilename(GetProj4Filename(pszName));
VSIStatBufL sStat;
if (osFilename.empty() || VSIStatL(osFilename, &sStat) != 0)
{
CPLDebug("GDAL", "Cannot find file corresponding to %s", pszName);
if (!bMissingOk)
{
if (pbError)
*pbError = true;
CSLDestroy(papszGrids);
return nullptr;
}
}
else
{
aosFilenames.AddString(osFilename);
}
}
CSLDestroy(papszGrids);
if (aosFilenames.empty())
{
if (pbError)
*pbError = false;
return nullptr;
}
char **papszArgv = nullptr;
papszArgv = CSLAddString(papszArgv, "-resolution");
papszArgv = CSLAddString(papszArgv, "highest");
papszArgv = CSLAddString(papszArgv, "-vrtnodata");
papszArgv = CSLAddString(papszArgv, "-inf");
papszArgv = CSLAddString(papszArgv, "-oo");
papszArgv =
CSLAddString(papszArgv, "@SHIFT_ORIGIN_IN_MINUS_180_PLUS_180=YES");
GDALBuildVRTOptions *psOptions = GDALBuildVRTOptionsNew(papszArgv, nullptr);
CSLDestroy(papszArgv);
GDALDatasetH hDS = GDALBuildVRT("", aosFilenames.size(), nullptr,
aosFilenames.List(), psOptions, nullptr);
GDALBuildVRTOptionsFree(psOptions);
if (pbError)
*pbError = hDS != nullptr;
return hDS;
}