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gdal_grid_lib.cpp
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/* ****************************************************************************
*
* Project: GDAL Utilities
* Purpose: GDAL scattered data gridding (interpolation) tool
* Author: Andrey Kiselev, [email protected]
*
* ****************************************************************************
* Copyright (c) 2007, Andrey Kiselev <[email protected]>
* Copyright (c) 2015, Even Rouault <even dot rouault at spatialys dot 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_port.h"
#include "gdal_utils.h"
#include "gdal_utils_priv.h"
#include "commonutils.h"
#include <cmath>
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <algorithm>
#include <vector>
#include "cpl_conv.h"
#include "cpl_error.h"
#include "cpl_progress.h"
#include "cpl_string.h"
#include "cpl_vsi.h"
#include "gdal.h"
#include "gdal_alg.h"
#include "gdal_priv.h"
#include "gdalgrid.h"
#include "ogr_api.h"
#include "ogr_core.h"
#include "ogr_feature.h"
#include "ogr_geometry.h"
#include "ogr_spatialref.h"
#include "ogr_srs_api.h"
#include "ogrsf_frmts.h"
/************************************************************************/
/* GDALGridOptions */
/************************************************************************/
/** Options for use with GDALGrid(). GDALGridOptions* must be allocated
* and freed with GDALGridOptionsNew() and GDALGridOptionsFree() respectively.
*/
struct GDALGridOptions
{
/*! output format. Use the short format name. */
char *pszFormat;
/*! allow or suppress progress monitor and other non-error output */
bool bQuiet;
/*! the progress function to use */
GDALProgressFunc pfnProgress;
/*! pointer to the progress data variable */
void *pProgressData;
char **papszLayers;
char *pszBurnAttribute;
double dfIncreaseBurnValue;
double dfMultiplyBurnValue;
char *pszWHERE;
char *pszSQL;
GDALDataType eOutputType;
char **papszCreateOptions;
int nXSize;
int nYSize;
double dfXRes;
double dfYRes;
double dfXMin;
double dfXMax;
double dfYMin;
double dfYMax;
bool bIsXExtentSet;
bool bIsYExtentSet;
GDALGridAlgorithm eAlgorithm;
void *pOptions;
char *pszOutputSRS;
OGRGeometry *poSpatialFilter;
bool bClipSrc;
OGRGeometry *poClipSrc;
char *pszClipSrcDS;
char *pszClipSrcSQL;
char *pszClipSrcLayer;
char *pszClipSrcWhere;
bool bNoDataSet;
double dfNoDataValue;
};
/************************************************************************/
/* GetAlgorithmName() */
/* */
/* Grids algorithm code into mnemonic name. */
/************************************************************************/
static void PrintAlgorithmAndOptions(GDALGridAlgorithm eAlgorithm,
void *pOptions)
{
switch (eAlgorithm)
{
case GGA_InverseDistanceToAPower:
{
printf("Algorithm name: \"%s\".\n", szAlgNameInvDist);
GDALGridInverseDistanceToAPowerOptions *pOptions2 =
static_cast<GDALGridInverseDistanceToAPowerOptions *>(pOptions);
CPLprintf("Options are "
"\"power=%f:smoothing=%f:radius1=%f:radius2=%f:angle=%f"
":max_points=%u:min_points=%u:nodata=%f\"\n",
pOptions2->dfPower, pOptions2->dfSmoothing,
pOptions2->dfRadius1, pOptions2->dfRadius2,
pOptions2->dfAngle, pOptions2->nMaxPoints,
pOptions2->nMinPoints, pOptions2->dfNoDataValue);
break;
}
case GGA_InverseDistanceToAPowerNearestNeighbor:
{
printf("Algorithm name: \"%s\".\n",
szAlgNameInvDistNearestNeighbor);
GDALGridInverseDistanceToAPowerNearestNeighborOptions *pOptions2 =
static_cast<
GDALGridInverseDistanceToAPowerNearestNeighborOptions *>(
pOptions);
CPLString osStr;
osStr.Printf("power=%f:smoothing=%f:radius=%f"
":max_points=%u:min_points=%u:nodata=%f",
pOptions2->dfPower, pOptions2->dfSmoothing,
pOptions2->dfRadius, pOptions2->nMaxPoints,
pOptions2->nMinPoints, pOptions2->dfNoDataValue);
if (pOptions2->nMinPointsPerQuadrant > 0)
osStr += CPLSPrintf(":min_points_per_quadrant=%u",
pOptions2->nMinPointsPerQuadrant);
if (pOptions2->nMaxPointsPerQuadrant > 0)
osStr += CPLSPrintf(":max_points_per_quadrant=%u",
pOptions2->nMaxPointsPerQuadrant);
printf("Options are: \"%s\n", osStr.c_str()); /* ok */
break;
}
case GGA_MovingAverage:
{
printf("Algorithm name: \"%s\".\n", szAlgNameAverage);
GDALGridMovingAverageOptions *pOptions2 =
static_cast<GDALGridMovingAverageOptions *>(pOptions);
CPLString osStr;
osStr.Printf("radius1=%f:radius2=%f:angle=%f:min_points=%u"
":nodata=%f",
pOptions2->dfRadius1, pOptions2->dfRadius2,
pOptions2->dfAngle, pOptions2->nMinPoints,
pOptions2->dfNoDataValue);
if (pOptions2->nMinPointsPerQuadrant > 0)
osStr += CPLSPrintf(":min_points_per_quadrant=%u",
pOptions2->nMinPointsPerQuadrant);
if (pOptions2->nMaxPointsPerQuadrant > 0)
osStr += CPLSPrintf(":max_points_per_quadrant=%u",
pOptions2->nMaxPointsPerQuadrant);
if (pOptions2->nMaxPoints > 0)
osStr += CPLSPrintf(":max_points=%u", pOptions2->nMaxPoints);
printf("Options are: \"%s\n", osStr.c_str()); /* ok */
break;
}
case GGA_NearestNeighbor:
{
printf("Algorithm name: \"%s\".\n", szAlgNameNearest);
GDALGridNearestNeighborOptions *pOptions2 =
static_cast<GDALGridNearestNeighborOptions *>(pOptions);
CPLprintf("Options are "
"\"radius1=%f:radius2=%f:angle=%f:nodata=%f\"\n",
pOptions2->dfRadius1, pOptions2->dfRadius2,
pOptions2->dfAngle, pOptions2->dfNoDataValue);
break;
}
case GGA_MetricMinimum:
case GGA_MetricMaximum:
case GGA_MetricRange:
case GGA_MetricCount:
case GGA_MetricAverageDistance:
case GGA_MetricAverageDistancePts:
{
const char *pszAlgName = "";
switch (eAlgorithm)
{
case GGA_MetricMinimum:
pszAlgName = szAlgNameMinimum;
break;
case GGA_MetricMaximum:
pszAlgName = szAlgNameMaximum;
break;
case GGA_MetricRange:
pszAlgName = szAlgNameRange;
break;
case GGA_MetricCount:
pszAlgName = szAlgNameCount;
break;
case GGA_MetricAverageDistance:
pszAlgName = szAlgNameAverageDistance;
break;
case GGA_MetricAverageDistancePts:
pszAlgName = szAlgNameAverageDistancePts;
break;
default:
CPLAssert(false);
break;
}
printf("Algorithm name: \"%s\".\n", pszAlgName);
GDALGridDataMetricsOptions *pOptions2 =
static_cast<GDALGridDataMetricsOptions *>(pOptions);
CPLString osStr;
osStr.Printf("radius1=%f:radius2=%f:angle=%f:min_points=%u"
":nodata=%f",
pOptions2->dfRadius1, pOptions2->dfRadius2,
pOptions2->dfAngle, pOptions2->nMinPoints,
pOptions2->dfNoDataValue);
if (pOptions2->nMinPointsPerQuadrant > 0)
osStr += CPLSPrintf(":min_points_per_quadrant=%u",
pOptions2->nMinPointsPerQuadrant);
if (pOptions2->nMaxPointsPerQuadrant > 0)
osStr += CPLSPrintf(":max_points_per_quadrant=%u",
pOptions2->nMaxPointsPerQuadrant);
printf("Options are: \"%s\n", osStr.c_str()); /* ok */
break;
}
case GGA_Linear:
{
printf("Algorithm name: \"%s\".\n", szAlgNameLinear);
GDALGridLinearOptions *pOptions2 =
static_cast<GDALGridLinearOptions *>(pOptions);
CPLprintf("Options are "
"\"radius=%f:nodata=%f\"\n",
pOptions2->dfRadius, pOptions2->dfNoDataValue);
break;
}
default:
{
printf("Algorithm is unknown.\n");
break;
}
}
}
/************************************************************************/
/* Extract point coordinates from the geometry reference and set the */
/* Z value as requested. Test whether we are in the clipped region */
/* before processing. */
/************************************************************************/
class GDALGridGeometryVisitor final : public OGRDefaultConstGeometryVisitor
{
public:
const OGRGeometry *poClipSrc = nullptr;
int iBurnField = 0;
double dfBurnValue = 0;
double dfIncreaseBurnValue = 0;
double dfMultiplyBurnValue = 1;
std::vector<double> adfX{};
std::vector<double> adfY{};
std::vector<double> adfZ{};
using OGRDefaultConstGeometryVisitor::visit;
void visit(const OGRPoint *p) override
{
if (poClipSrc && !p->Within(poClipSrc))
return;
if (iBurnField < 0 && std::isnan(p->getZ()))
return;
adfX.push_back(p->getX());
adfY.push_back(p->getY());
if (iBurnField < 0)
adfZ.push_back((p->getZ() + dfIncreaseBurnValue) *
dfMultiplyBurnValue);
else
adfZ.push_back((dfBurnValue + dfIncreaseBurnValue) *
dfMultiplyBurnValue);
}
};
/************************************************************************/
/* ProcessLayer() */
/* */
/* Process all the features in a layer selection, collecting */
/* geometries and burn values. */
/************************************************************************/
static CPLErr ProcessLayer(OGRLayerH hSrcLayer, GDALDatasetH hDstDS,
const OGRGeometry *poClipSrc, int nXSize, int nYSize,
int nBand, bool &bIsXExtentSet, bool &bIsYExtentSet,
double &dfXMin, double &dfXMax, double &dfYMin,
double &dfYMax, const char *pszBurnAttribute,
const double dfIncreaseBurnValue,
const double dfMultiplyBurnValue, GDALDataType eType,
GDALGridAlgorithm eAlgorithm, void *pOptions,
bool bQuiet, GDALProgressFunc pfnProgress,
void *pProgressData)
{
/* -------------------------------------------------------------------- */
/* Get field index, and check. */
/* -------------------------------------------------------------------- */
int iBurnField = -1;
if (pszBurnAttribute)
{
iBurnField = OGR_FD_GetFieldIndex(OGR_L_GetLayerDefn(hSrcLayer),
pszBurnAttribute);
if (iBurnField == -1)
{
printf("Failed to find field %s on layer %s, skipping.\n",
pszBurnAttribute,
OGR_FD_GetName(OGR_L_GetLayerDefn(hSrcLayer)));
return CE_Failure;
}
}
/* -------------------------------------------------------------------- */
/* Collect the geometries from this layer, and build list of */
/* values to be interpolated. */
/* -------------------------------------------------------------------- */
GDALGridGeometryVisitor oVisitor;
oVisitor.poClipSrc = poClipSrc;
oVisitor.iBurnField = iBurnField;
oVisitor.dfIncreaseBurnValue = dfIncreaseBurnValue;
oVisitor.dfMultiplyBurnValue = dfMultiplyBurnValue;
for (auto &&poFeat : OGRLayer::FromHandle(hSrcLayer))
{
const OGRGeometry *poGeom = poFeat->GetGeometryRef();
if (poGeom)
{
if (iBurnField >= 0)
{
if (!poFeat->IsFieldSetAndNotNull(iBurnField))
{
continue;
}
oVisitor.dfBurnValue = poFeat->GetFieldAsDouble(iBurnField);
}
poGeom->accept(&oVisitor);
}
}
if (oVisitor.adfX.empty())
{
printf("No point geometry found on layer %s, skipping.\n",
OGR_FD_GetName(OGR_L_GetLayerDefn(hSrcLayer)));
return CE_None;
}
/* -------------------------------------------------------------------- */
/* Compute grid geometry. */
/* -------------------------------------------------------------------- */
if (!bIsXExtentSet || !bIsYExtentSet)
{
OGREnvelope sEnvelope;
OGR_L_GetExtent(hSrcLayer, &sEnvelope, TRUE);
if (!bIsXExtentSet)
{
dfXMin = sEnvelope.MinX;
dfXMax = sEnvelope.MaxX;
bIsXExtentSet = true;
}
if (!bIsYExtentSet)
{
dfYMin = sEnvelope.MinY;
dfYMax = sEnvelope.MaxY;
bIsYExtentSet = true;
}
}
// Produce north-up images
if (dfYMin < dfYMax)
std::swap(dfYMin, dfYMax);
/* -------------------------------------------------------------------- */
/* Perform gridding. */
/* -------------------------------------------------------------------- */
const double dfDeltaX = (dfXMax - dfXMin) / nXSize;
const double dfDeltaY = (dfYMax - dfYMin) / nYSize;
if (!bQuiet)
{
printf("Grid data type is \"%s\"\n", GDALGetDataTypeName(eType));
printf("Grid size = (%d %d).\n", nXSize, nYSize);
CPLprintf("Corner coordinates = (%f %f)-(%f %f).\n", dfXMin, dfYMin,
dfXMax, dfYMax);
CPLprintf("Grid cell size = (%f %f).\n", dfDeltaX, dfDeltaY);
printf("Source point count = %lu.\n",
static_cast<unsigned long>(oVisitor.adfX.size()));
PrintAlgorithmAndOptions(eAlgorithm, pOptions);
printf("\n");
}
GDALRasterBandH hBand = GDALGetRasterBand(hDstDS, nBand);
int nBlockXSize = 0;
int nBlockYSize = 0;
const int nDataTypeSize = GDALGetDataTypeSizeBytes(eType);
// Try to grow the work buffer up to 16 MB if it is smaller
GDALGetBlockSize(hBand, &nBlockXSize, &nBlockYSize);
if (nXSize == 0 || nYSize == 0 || nBlockXSize == 0 || nBlockYSize == 0)
return CE_Failure;
const int nDesiredBufferSize = 16 * 1024 * 1024;
if (nBlockXSize < nXSize && nBlockYSize < nYSize &&
nBlockXSize < nDesiredBufferSize / (nBlockYSize * nDataTypeSize))
{
const int nNewBlockXSize =
nDesiredBufferSize / (nBlockYSize * nDataTypeSize);
nBlockXSize = (nNewBlockXSize / nBlockXSize) * nBlockXSize;
if (nBlockXSize > nXSize)
nBlockXSize = nXSize;
}
else if (nBlockXSize == nXSize && nBlockYSize < nYSize &&
nBlockYSize < nDesiredBufferSize / (nXSize * nDataTypeSize))
{
const int nNewBlockYSize =
nDesiredBufferSize / (nXSize * nDataTypeSize);
nBlockYSize = (nNewBlockYSize / nBlockYSize) * nBlockYSize;
if (nBlockYSize > nYSize)
nBlockYSize = nYSize;
}
CPLDebug("GDAL_GRID", "Work buffer: %d * %d", nBlockXSize, nBlockYSize);
void *pData = VSIMalloc3(nBlockXSize, nBlockYSize, nDataTypeSize);
if (pData == nullptr)
{
CPLError(CE_Failure, CPLE_OutOfMemory, "Cannot allocate work buffer");
return CE_Failure;
}
GIntBig nBlock = 0;
const double dfBlockCount =
static_cast<double>(DIV_ROUND_UP(nXSize, nBlockXSize)) *
DIV_ROUND_UP(nYSize, nBlockYSize);
GDALGridContext *psContext = GDALGridContextCreate(
eAlgorithm, pOptions, static_cast<int>(oVisitor.adfX.size()),
&(oVisitor.adfX[0]), &(oVisitor.adfY[0]), &(oVisitor.adfZ[0]), TRUE);
if (psContext == nullptr)
{
CPLFree(pData);
return CE_Failure;
}
CPLErr eErr = CE_None;
for (int nYOffset = 0; nYOffset < nYSize && eErr == CE_None;
nYOffset += nBlockYSize)
{
for (int nXOffset = 0; nXOffset < nXSize && eErr == CE_None;
nXOffset += nBlockXSize)
{
void *pScaledProgress = GDALCreateScaledProgress(
static_cast<double>(nBlock) / dfBlockCount,
static_cast<double>(nBlock + 1) / dfBlockCount, pfnProgress,
pProgressData);
nBlock++;
int nXRequest = nBlockXSize;
if (nXOffset > nXSize - nXRequest)
nXRequest = nXSize - nXOffset;
int nYRequest = nBlockYSize;
if (nYOffset > nYSize - nYRequest)
nYRequest = nYSize - nYOffset;
eErr = GDALGridContextProcess(
psContext, dfXMin + dfDeltaX * nXOffset,
dfXMin + dfDeltaX * (nXOffset + nXRequest),
dfYMin + dfDeltaY * nYOffset,
dfYMin + dfDeltaY * (nYOffset + nYRequest), nXRequest,
nYRequest, eType, pData, GDALScaledProgress, pScaledProgress);
if (eErr == CE_None)
eErr = GDALRasterIO(hBand, GF_Write, nXOffset, nYOffset,
nXRequest, nYRequest, pData, nXRequest,
nYRequest, eType, 0, 0);
GDALDestroyScaledProgress(pScaledProgress);
}
}
if (eErr == CE_None && pfnProgress)
pfnProgress(1.0, "", pProgressData);
GDALGridContextFree(psContext);
CPLFree(pData);
return eErr;
}
/************************************************************************/
/* LoadGeometry() */
/* */
/* Read geometries from the given dataset using specified filters and */
/* returns a collection of read geometries. */
/************************************************************************/
static OGRGeometryCollection *LoadGeometry(const char *pszDS,
const char *pszSQL,
const char *pszLyr,
const char *pszWhere)
{
GDALDataset *poDS = static_cast<GDALDataset *>(
GDALOpenEx(pszDS, GDAL_OF_VECTOR, nullptr, nullptr, nullptr));
if (poDS == nullptr)
return nullptr;
OGRLayer *poLyr = nullptr;
if (pszSQL != nullptr)
poLyr = poDS->ExecuteSQL(pszSQL, nullptr, nullptr);
else if (pszLyr != nullptr)
poLyr = poDS->GetLayerByName(pszLyr);
else
poLyr = poDS->GetLayer(0);
if (poLyr == nullptr)
{
CPLError(CE_Failure, CPLE_AppDefined,
"Failed to identify source layer from datasource.");
GDALClose(poDS);
return nullptr;
}
if (pszWhere)
poLyr->SetAttributeFilter(pszWhere);
OGRGeometryCollection *poGeom = nullptr;
for (auto &poFeat : poLyr)
{
OGRGeometry *poSrcGeom = poFeat->GetGeometryRef();
if (poSrcGeom)
{
const OGRwkbGeometryType eType =
wkbFlatten(poSrcGeom->getGeometryType());
if (poGeom == nullptr)
poGeom = new OGRMultiPolygon();
if (eType == wkbPolygon)
{
poGeom->addGeometry(poSrcGeom);
}
else if (eType == wkbMultiPolygon)
{
const int nGeomCount = static_cast<OGRMultiPolygon *>(poSrcGeom)
->getNumGeometries();
for (int iGeom = 0; iGeom < nGeomCount; iGeom++)
{
poGeom->addGeometry(
static_cast<OGRMultiPolygon *>(poSrcGeom)
->getGeometryRef(iGeom));
}
}
else
{
CPLError(CE_Failure, CPLE_AppDefined,
"Geometry not of polygon type.");
OGRGeometryFactory::destroyGeometry(poGeom);
if (pszSQL != nullptr)
poDS->ReleaseResultSet(poLyr);
GDALClose(poDS);
return nullptr;
}
}
}
if (pszSQL != nullptr)
poDS->ReleaseResultSet(poLyr);
GDALClose(poDS);
return poGeom;
}
/************************************************************************/
/* GDALGrid() */
/************************************************************************/
/* clang-format off */
/**
* Create raster from the scattered data.
*
* This is the equivalent of the
* <a href="/programs/gdal_grid.html">gdal_grid</a> utility.
*
* GDALGridOptions* must be allocated and freed with GDALGridOptionsNew()
* and GDALGridOptionsFree() respectively.
*
* @param pszDest the destination dataset path.
* @param hSrcDataset the source dataset handle.
* @param psOptionsIn the options struct returned by GDALGridOptionsNew() or
* NULL.
* @param pbUsageError pointer to a integer output variable to store if any
* usage error has occurred or NULL.
* @return the output dataset (new dataset that must be closed using
* GDALClose()) or NULL in case of error.
*
* @since GDAL 2.1
*/
/* clang-format on */
GDALDatasetH GDALGrid(const char *pszDest, GDALDatasetH hSrcDataset,
const GDALGridOptions *psOptionsIn, int *pbUsageError)
{
if (hSrcDataset == nullptr)
{
CPLError(CE_Failure, CPLE_AppDefined, "No source dataset specified.");
if (pbUsageError)
*pbUsageError = TRUE;
return nullptr;
}
if (pszDest == nullptr)
{
CPLError(CE_Failure, CPLE_AppDefined, "No target dataset specified.");
if (pbUsageError)
*pbUsageError = TRUE;
return nullptr;
}
GDALGridOptions *psOptionsToFree = nullptr;
const GDALGridOptions *psOptions = psOptionsIn;
if (psOptions == nullptr)
{
psOptionsToFree = GDALGridOptionsNew(nullptr, nullptr);
psOptions = psOptionsToFree;
}
GDALDataset *poSrcDS = static_cast<GDALDataset *>(hSrcDataset);
if (psOptions->pszSQL == nullptr && psOptions->papszLayers == nullptr &&
poSrcDS->GetLayerCount() != 1)
{
CPLError(CE_Failure, CPLE_NotSupported,
"Neither -sql nor -l are specified, but the source dataset "
"has not one single layer.");
if (pbUsageError)
*pbUsageError = TRUE;
GDALGridOptionsFree(psOptionsToFree);
return nullptr;
}
if ((psOptions->nXSize != 0 || psOptions->nYSize != 0) &&
(psOptions->dfXRes != 0 || psOptions->dfYRes != 0))
{
CPLError(CE_Failure, CPLE_IllegalArg,
"-outsize and -tr options cannot be used at the same time.");
GDALGridOptionsFree(psOptionsToFree);
return nullptr;
}
/* -------------------------------------------------------------------- */
/* Find the output driver. */
/* -------------------------------------------------------------------- */
CPLString osFormat;
if (psOptions->pszFormat == nullptr)
{
osFormat = GetOutputDriverForRaster(pszDest);
if (osFormat.empty())
{
GDALGridOptionsFree(psOptionsToFree);
return nullptr;
}
}
else
{
osFormat = psOptions->pszFormat;
}
GDALDriverH hDriver = GDALGetDriverByName(osFormat);
if (hDriver == nullptr)
{
CPLError(CE_Failure, CPLE_AppDefined,
"Output driver `%s' not recognised.", osFormat.c_str());
fprintf(stderr, "The following format drivers are configured and "
"support output:\n");
for (int iDr = 0; iDr < GDALGetDriverCount(); iDr++)
{
hDriver = GDALGetDriver(iDr);
if (GDALGetMetadataItem(hDriver, GDAL_DCAP_RASTER, nullptr) !=
nullptr &&
(GDALGetMetadataItem(hDriver, GDAL_DCAP_CREATE, nullptr) !=
nullptr ||
GDALGetMetadataItem(hDriver, GDAL_DCAP_CREATECOPY, nullptr) !=
nullptr))
{
fprintf(stderr, " %s: %s\n", GDALGetDriverShortName(hDriver),
GDALGetDriverLongName(hDriver));
}
}
printf("\n");
GDALGridOptionsFree(psOptionsToFree);
return nullptr;
}
/* -------------------------------------------------------------------- */
/* Create target raster file. */
/* -------------------------------------------------------------------- */
int nLayerCount = CSLCount(psOptions->papszLayers);
if (nLayerCount == 0 && psOptions->pszSQL == nullptr)
nLayerCount = 1; /* due to above check */
int nBands = nLayerCount;
if (psOptions->pszSQL)
nBands++;
int nXSize;
int nYSize;
if (psOptions->dfXRes != 0 && psOptions->dfYRes != 0)
{
if ((psOptions->dfXMax == psOptions->dfXMin) ||
(psOptions->dfYMax == psOptions->dfYMin))
{
CPLError(CE_Failure, CPLE_IllegalArg,
"Invalid txe or tye parameters detected. Please check "
"your -txe or -tye argument.");
if (pbUsageError)
*pbUsageError = TRUE;
GDALGridOptionsFree(psOptionsToFree);
return nullptr;
}
double dfXSize = (std::fabs(psOptions->dfXMax - psOptions->dfXMin) +
(psOptions->dfXRes / 2.0)) /
psOptions->dfXRes;
double dfYSize = (std::fabs(psOptions->dfYMax - psOptions->dfYMin) +
(psOptions->dfYRes / 2.0)) /
psOptions->dfYRes;
if (dfXSize >= 1 && dfXSize <= INT_MAX && dfYSize >= 1 &&
dfYSize <= INT_MAX)
{
nXSize = static_cast<int>(dfXSize);
nYSize = static_cast<int>(dfYSize);
}
else
{
CPLError(
CE_Failure, CPLE_IllegalArg,
"Invalid output size detected. Please check your -tr argument");
if (pbUsageError)
*pbUsageError = TRUE;
GDALGridOptionsFree(psOptionsToFree);
return nullptr;
}
}
else
{
// FIXME
nXSize = psOptions->nXSize;
if (nXSize == 0)
nXSize = 256;
nYSize = psOptions->nYSize;
if (nYSize == 0)
nYSize = 256;
}
GDALDatasetH hDstDS =
GDALCreate(hDriver, pszDest, nXSize, nYSize, nBands,
psOptions->eOutputType, psOptions->papszCreateOptions);
if (hDstDS == nullptr)
{
GDALGridOptionsFree(psOptionsToFree);
return nullptr;
}
if (psOptions->bNoDataSet)
{
for (int i = 1; i <= nBands; i++)
{
GDALRasterBandH hBand = GDALGetRasterBand(hDstDS, i);
GDALSetRasterNoDataValue(hBand, psOptions->dfNoDataValue);
}
}
double dfXMin = psOptions->dfXMin;
double dfYMin = psOptions->dfYMin;
double dfXMax = psOptions->dfXMax;
double dfYMax = psOptions->dfYMax;
bool bIsXExtentSet = psOptions->bIsXExtentSet;
bool bIsYExtentSet = psOptions->bIsYExtentSet;
CPLErr eErr = CE_None;
/* -------------------------------------------------------------------- */
/* Process SQL request. */
/* -------------------------------------------------------------------- */
if (psOptions->pszSQL != nullptr)
{
OGRLayer *poLayer = poSrcDS->ExecuteSQL(
psOptions->pszSQL, psOptions->poSpatialFilter, nullptr);
if (poLayer != nullptr)
{
// Custom layer will be rasterized in the first band.
eErr = ProcessLayer(
OGRLayer::ToHandle(poLayer), hDstDS, psOptions->poSpatialFilter,
nXSize, nYSize, 1, bIsXExtentSet, bIsYExtentSet, dfXMin, dfXMax,
dfYMin, dfYMax, psOptions->pszBurnAttribute,
psOptions->dfIncreaseBurnValue, psOptions->dfMultiplyBurnValue,
psOptions->eOutputType, psOptions->eAlgorithm,
psOptions->pOptions, psOptions->bQuiet, psOptions->pfnProgress,
psOptions->pProgressData);
poSrcDS->ReleaseResultSet(poLayer);
}
}
/* -------------------------------------------------------------------- */
/* Process each layer. */
/* -------------------------------------------------------------------- */
char *pszOutputSRS =
psOptions->pszOutputSRS ? CPLStrdup(psOptions->pszOutputSRS) : nullptr;
for (int i = 0; i < nLayerCount; i++)
{
OGRLayerH hLayer = psOptions->papszLayers == nullptr
? GDALDatasetGetLayer(hSrcDataset, 0)
: GDALDatasetGetLayerByName(
hSrcDataset, psOptions->papszLayers[i]);
if (hLayer == nullptr)
{
CPLError(CE_Failure, CPLE_AppDefined,
"Unable to find layer \"%s\", skipping.",
psOptions->papszLayers && psOptions->papszLayers[i]
? psOptions->papszLayers[i]
: "null");
continue;
}
if (psOptions->pszWHERE)
{
if (OGR_L_SetAttributeFilter(hLayer, psOptions->pszWHERE) !=
OGRERR_NONE)
break;
}
if (psOptions->poSpatialFilter != nullptr)
OGR_L_SetSpatialFilter(
hLayer, OGRGeometry::ToHandle(psOptions->poSpatialFilter));
// Fetch the first meaningful SRS definition
if (!pszOutputSRS)
{
OGRSpatialReferenceH hSRS = OGR_L_GetSpatialRef(hLayer);
if (hSRS)
OSRExportToWkt(hSRS, &pszOutputSRS);
}
eErr = ProcessLayer(
hLayer, hDstDS, psOptions->poSpatialFilter, nXSize, nYSize,
i + 1 + nBands - nLayerCount, bIsXExtentSet, bIsYExtentSet, dfXMin,
dfXMax, dfYMin, dfYMax, psOptions->pszBurnAttribute,
psOptions->dfIncreaseBurnValue, psOptions->dfMultiplyBurnValue,
psOptions->eOutputType, psOptions->eAlgorithm, psOptions->pOptions,
psOptions->bQuiet, psOptions->pfnProgress,
psOptions->pProgressData);
if (eErr != CE_None)
break;
}
/* -------------------------------------------------------------------- */
/* Apply geotransformation matrix. */
/* -------------------------------------------------------------------- */
double adfGeoTransform[6] = {dfXMin, (dfXMax - dfXMin) / nXSize,
0.0, dfYMin,
0.0, (dfYMax - dfYMin) / nYSize};
GDALSetGeoTransform(hDstDS, adfGeoTransform);
/* -------------------------------------------------------------------- */
/* Apply SRS definition if set. */
/* -------------------------------------------------------------------- */
if (pszOutputSRS)
{
GDALSetProjection(hDstDS, pszOutputSRS);
CPLFree(pszOutputSRS);
}
/* -------------------------------------------------------------------- */
/* End */
/* -------------------------------------------------------------------- */
GDALGridOptionsFree(psOptionsToFree);
if (eErr != CE_None)
{
GDALClose(hDstDS);
return nullptr;
}
return hDstDS;
}
/************************************************************************/
/* IsNumber() */
/************************************************************************/
static bool IsNumber(const char *pszStr)
{
if (*pszStr == '-' || *pszStr == '+')
pszStr++;
if (*pszStr == '.')
pszStr++;
return *pszStr >= '0' && *pszStr <= '9';
}
/************************************************************************/
/* GDALGridOptionsNew() */
/************************************************************************/
/**
* Allocates a GDALGridOptions struct.
*
* @param papszArgv NULL terminated list of options (potentially including
* filename and open options too), or NULL. The accepted options are the ones of
* the <a href="/programs/gdal_translate.html">gdal_translate</a> utility.
* @param psOptionsForBinary (output) may be NULL (and should generally be
* NULL), otherwise (gdal_translate_bin.cpp use case) must be allocated with
* GDALGridOptionsForBinaryNew() prior to this
* function. Will be filled with potentially present filename, open options,...
* @return pointer to the allocated GDALGridOptions struct. Must be freed with
* GDALGridOptionsFree().
*
* @since GDAL 2.1
*/
GDALGridOptions *
GDALGridOptionsNew(char **papszArgv,
GDALGridOptionsForBinary *psOptionsForBinary)
{
GDALGridOptions *psOptions =
static_cast<GDALGridOptions *>(CPLCalloc(1, sizeof(GDALGridOptions)));
psOptions->pszFormat = nullptr;
psOptions->bQuiet = true;
psOptions->pfnProgress = GDALDummyProgress;
psOptions->pProgressData = nullptr;
psOptions->papszLayers = nullptr;
psOptions->pszBurnAttribute = nullptr;
psOptions->dfIncreaseBurnValue = 0.0;
psOptions->dfMultiplyBurnValue = 1.0;
psOptions->pszWHERE = nullptr;
psOptions->pszSQL = nullptr;
psOptions->eOutputType = GDT_Float64;
psOptions->papszCreateOptions = nullptr;
psOptions->nXSize = 0;
psOptions->nYSize = 0;
psOptions->dfXRes = 0;
psOptions->dfYRes = 0;
psOptions->dfXMin = 0.0;
psOptions->dfXMax = 0.0;
psOptions->dfYMin = 0.0;
psOptions->dfYMax = 0.0;
psOptions->bIsXExtentSet = false;
psOptions->bIsYExtentSet = false;
psOptions->eAlgorithm = GGA_InverseDistanceToAPower;
psOptions->pOptions = nullptr;
psOptions->pszOutputSRS = nullptr;
psOptions->poSpatialFilter = nullptr;
psOptions->poClipSrc = nullptr;
psOptions->bClipSrc = false;
psOptions->pszClipSrcDS = nullptr;
psOptions->pszClipSrcSQL = nullptr;
psOptions->pszClipSrcLayer = nullptr;
psOptions->pszClipSrcWhere = nullptr;
psOptions->bNoDataSet = false;
psOptions->dfNoDataValue = 0;
GDALGridParseAlgorithmAndOptions(szAlgNameInvDist, &psOptions->eAlgorithm,
&psOptions->pOptions);
bool bGotSourceFilename = false;