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gdal_algs.cpp
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// Copyright (c) 2018-2025 Robert J. Hijmans
//
// This file is part of the "spat" library.
//
// spat is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 2 of the License, or
// (at your option) any later version.
//
// spat is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with spat. If not, see <http://www.gnu.org/licenses/>.
#include "gdalwarper.h"
#include "ogr_spatialref.h"
#include "gdal_alg.h"
#include "ogrsf_frmts.h"
#include "gdal_utils.h" // for GDALWarp() in warper_by_util
#include "spatRaster.h"
#include "string_utils.h"
#include "file_utils.h"
#include "vecmath.h"
#include "crs.h"
#include "gdalio.h"
#include "recycle.h"
#include <sstream>
/*
GDAL 3.10
std::vector<double> SpatRaster::extract_interpolate(std::vector<double> x, std::vector<double> y, std::string algo) {
GDALRIOResampleAlg eInterpolation = GRIORA_Bilinear ;
size_t n = x.size();
std::vector<double> out(n, NAN);
double value;
GDALDatasetH hDs;
SpatOptions opt;
if (!open_gdal(hDs, 0, false, opt)) {
setError("cannot open dataset");
return(out);
}
GDALRasterBandH poBand = GDALGetRasterBand(hDs, 1);
for (size_t i=0; i<n; i++) {
if (GDALInterpolateAtPoint(pbBand, x[i], y[1], eInterpolation, &value) == CE_None) {
out[i] = value;
}
}
GDALClose( hDs );
return out;
}
*/
SpatGeom getPolygonsGeom2(OGRGeometry *poGeometry) {
SpatGeom g(polygons);
OGRPoint ogrPt;
// OGRwkbGeometryType geomtype = poGeometry->getGeometryType();
// if ( geomtype == wkbPolygon ) {
OGRPolygon *poGeom = ( OGRPolygon * )poGeometry;
OGRLinearRing *poRing = poGeom->getExteriorRing();
unsigned np = poRing->getNumPoints();
std::vector<double> X(np);
std::vector<double> Y(np);
for (size_t i=0; i<np; i++) {
poRing->getPoint(i, &ogrPt);
X[i] = ogrPt.getX();
Y[i] = ogrPt.getY();
}
SpatPart p(X, Y);
unsigned nh = poGeom->getNumInteriorRings();
for (size_t i=0; i<nh; i++) {
OGRLinearRing *poHole = poGeom->getInteriorRing(i);
unsigned np = poHole->getNumPoints();
std::vector<double> X(np);
std::vector<double> Y(np);
for (size_t j=0; j<np; j++) {
poHole->getPoint(j, &ogrPt);
X[j] = ogrPt.getX();
Y[j] = ogrPt.getY();
}
p.addHole(X, Y);
}
g.addPart(p);
// }
return g;
}
SpatVector SpatVector::buffer3(std::vector<double> d, unsigned quadsegs) {
SpatVector out;
recycle(d, size());
GDALDataset* v = write_ogr("", "layer", "Memory", false, true, std::vector<std::string>());
OGRLayer *poLayer = v->GetLayer(0);
poLayer->ResetReading();
OGRFeature *poFeature;
while( (poFeature = poLayer->GetNextFeature()) != NULL ) {
OGRGeometry *poGeometry = poFeature->GetGeometryRef();
if (poGeometry != NULL) {
// using d[0] for now
OGRGeometry *bufGeom = poGeometry->Buffer(d[0], quadsegs);
SpatGeom g = getPolygonsGeom2(bufGeom);
out.addGeom(g);
}
OGRFeature::DestroyFeature( poFeature );
}
GDALClose(v);
return out;
}
SpatVector SpatRaster::dense_extent(bool inside, bool geobounds) {
SpatExtent e = getExtent();
if (geobounds && is_lonlat()) {
if ((e.ymin <= -90) || (e.ymax >= 90)) {
double fy = yres() / 10; // avoid Inf with Mercator
SpatRaster g = geometry();
e.ymin= std::max(e.ymin, -90.0+fy);
e.ymax= std::min(e.ymax, 90.0-fy);
g.source[0].extent = e;
return g.dense_extent(inside, false);
}
}
std::vector<int_64> rows, cols;
if (nrow() < 51) {
rows.resize(nrow());
std::iota(rows.begin(), rows.end(), 0);
} else {
rows = seq_steps((int_64) 0, (int_64) nrow()-1, 50);
}
if (ncol() < 51) {
cols.resize(ncol());
std::iota(cols.begin(), cols.end(), 0);
} else {
cols = seq_steps((int_64) 0, (int_64) ncol()-1, 50);
}
std::vector<double> xcol = xFromCol(cols) ;
std::vector<double> yrow = yFromRow(rows) ;
double yr = yres() / 4;
if (inside) {
yrow.insert(yrow.begin(), e.ymax - yr);
yrow.push_back(e.ymin + yr);
std::vector<double> y0(xcol.size(), e.ymin+yr);
std::vector<double> y1(xcol.size(), e.ymax-yr);
} else {
yrow.insert(yrow.begin(), e.ymax);
yrow.push_back(e.ymin);
std::vector<double> y0(xcol.size(), e.ymin);
std::vector<double> y1(xcol.size(), e.ymax);
}
std::vector<double> y0(xcol.size(), e.ymin);
std::vector<double> y1(xcol.size(), e.ymax);
std::vector<double> x0(yrow.size(), e.xmin);
std::vector<double> x1(yrow.size(), e.xmax);
std::vector<double> x = x0;
std::vector<double> y = yrow;
x.insert(x.end(), xcol.begin(), xcol.end());
y.insert(y.end(), y0.begin(), y0.end());
std::reverse(yrow.begin(), yrow.end());
std::reverse(xcol.begin(), xcol.end());
x.insert(x.end(), x1.begin(), x1.end());
y.insert(y.end(), yrow.begin(), yrow.end() );
x.insert(x.end(), xcol.begin(), xcol.end());
y.insert(y.end(), y1.begin(), y1.end());
x.push_back(x[0]);
y.push_back(y[0]);
SpatVector v(x, y, polygons, getSRS("wkt"));
return v;
}
#if GDAL_VERSION_MAJOR <= 2 && GDAL_VERSION_MINOR < 2
SpatRaster SpatRaster::warper(SpatRaster x, std::string crs, std::string method, bool mask, bool align, bool resample, SpatOptions &opt) {
SpatRaster out;
out.setError("Not supported for this old version of GDAL");
return(out);
}
#else
bool get_output_bounds(const GDALDatasetH &hSrcDS, std::string srccrs, const std::string dstcrs, SpatRaster &r) {
if ( hSrcDS == NULL ) {
r.setError("data source is NULL");
return false;
}
// Get Source coordinate system.
// const char *pszSrcWKT = GDALGetProjectionRef( hSrcDS );
const char *pszSrcWKT = srccrs.c_str();
if ( pszSrcWKT == NULL || strlen(pszSrcWKT) == 0 ) {
r.setError("data source has no WKT");
return false;
}
OGRSpatialReference* oSRS = new OGRSpatialReference;
std::string msg = "";
if (is_ogr_error(oSRS->SetFromUserInput( dstcrs.c_str() ), msg)) {
r.setError(msg);
return false;
};
char *pszDstWKT = NULL;
#if GDAL_VERSION_MAJOR >= 3
const char *options[3] = { "MULTILINE=YES", "FORMAT=WKT2", NULL };
oSRS->exportToWkt( &pszDstWKT, options);
#else
oSRS->exportToWkt( &pszDstWKT );
#endif
// Create a transformer that maps from source pixel/line coordinates
// to destination georeferenced coordinates (not destination
// pixel line). We do that by omitting the destination dataset
// handle (setting it to NULL).
void *hTransformArg;
hTransformArg =
GDALCreateGenImgProjTransformer( hSrcDS, pszSrcWKT, NULL, pszDstWKT, FALSE, 0, 1 );
if (hTransformArg == NULL ) {
r.setError("cannot create TranformArg");
return false;
}
CPLFree(pszDstWKT);
delete oSRS;
double adfDstGeoTransform[6];
int nPixels=0, nLines=0;
CPLErr eErr = GDALSuggestedWarpOutput( hSrcDS, GDALGenImgProjTransform,
hTransformArg, adfDstGeoTransform, &nPixels, &nLines );
GDALDestroyGenImgProjTransformer( hTransformArg );
if ( eErr != CE_None ) {
r.setError("cannot create warp output");
return false;
}
r.source[0].ncol = nPixels;
r.source[0].nrow = nLines;
r.source[0].extent.xmin = adfDstGeoTransform[0]; /* left x */
/* w-e pixel resolution */
r.source[0].extent.xmax = r.source[0].extent.xmin + adfDstGeoTransform[1] * nPixels;
r.source[0].extent.ymax = adfDstGeoTransform[3]; // top y
r.source[0].extent.ymin = r.source[0].extent.ymax + nLines * adfDstGeoTransform[5];
r.setSRS({dstcrs});
return true;
}
/*
// Create output with same datatype as first input band.
GDALDataType eDT = GDALGetRasterDataType(GDALGetRasterBand(hSrcDS,1));
GDALDataType eDT;
getGDALDataType(datatype, eDT);
// Create the output DS.
GDALDriverH hDriver = GDALGetDriverByName( driver.c_str() );
if ( hDriver == NULL ) {
msg = "empty driver";
return false;
}
if (driver == "MEM") {
hDstDS = GDALCreate( hDriver, "", nPixels, nLines, nlyrs, eDT, NULL );
} else {
hDstDS = GDALCreate( hDriver, filename.c_str(), nPixels, nLines, nlyrs, eDT, NULL );
}
if ( hDstDS == NULL ) {
msg = "cannot create output dataset";
return false;
}
// Write out the projection definition.
GDALSetProjection( hDstDS, pszDstWKT );
GDALSetGeoTransform( hDstDS, adfDstGeoTransform );
// Copy the color table, if required.
GDALColorTableH hCT;
hCT = GDALGetRasterColorTable( GDALGetRasterBand(hSrcDS,1) );
if( hCT != NULL )
GDALSetRasterColorTable( GDALGetRasterBand(hDstDS,1), hCT );
CPLFree(pszDstWKT);
delete oSRS;
return true;
}
*/
bool getAlgo(GDALResampleAlg &alg, std::string m) {
if (m=="sum") {
#if GDAL_VERSION_MAJOR >= 3 && GDAL_VERSION_MINOR >= 1
alg = GRA_Sum;
return true;
}
#else
return false;
}
#endif
if (m=="rms") {
#if GDAL_VERSION_MAJOR >= 3 && GDAL_VERSION_MINOR >= 3
alg = GRA_RMS;
return true;
}
#else
return false;
}
#endif
if ( m == "near" ) {
alg = GRA_NearestNeighbour;
} else if (m=="bilinear") {
alg = GRA_Bilinear;
} else if (m=="cubic") {
alg = GRA_Cubic;
} else if (m=="cubicspline") {
alg = GRA_CubicSpline;
} else if (m=="lanczos") {
alg = GRA_Lanczos;
} else if (m=="average") {
alg = GRA_Average;
} else if (m=="mode") {
alg = GRA_Mode;
} else if (m=="max") {
alg = GRA_Max;
} else if (m=="min") {
alg = GRA_Min;
} else if (m=="median") {
alg = GRA_Med;
} else if (m=="q1") {
alg = GRA_Q1;
} else if (m=="q3") {
alg = GRA_Q3;
} else {
return false;
}
return true;
}
bool is_valid_warp_method(const std::string &method) {
std::vector<std::string> m { "near", "bilinear", "cubic", "cubicspline", "lanczos", "average", "mode", "max", "min", "med", "q1", "q3", "sum", "rms"};
return (std::find(m.begin(), m.end(), method) != m.end());
}
bool set_warp_options(GDALWarpOptions *psWarpOptions, GDALDatasetH &hSrcDS, GDALDatasetH &hDstDS, std::vector<size_t> srcbands, std::vector<size_t> dstbands, std::string method, std::string srccrs, std::string msg, bool verbose, bool threads) {
if (srcbands.size() != dstbands.size()) {
msg = "number of source bands must match number of dest bands";
return false;
}
int nbands = srcbands.size();
GDALResampleAlg a;
if (!getAlgo(a, method)) {
msg = method + " is not a valid method";
return false;
}
// Setup warp options.
psWarpOptions->hSrcDS = hSrcDS;
psWarpOptions->hDstDS = hDstDS;
psWarpOptions->eResampleAlg = a;
psWarpOptions->nBandCount = nbands;
psWarpOptions->panSrcBands = (int *) CPLMalloc(sizeof(int) * nbands );
psWarpOptions->panDstBands = (int *) CPLMalloc(sizeof(int) * nbands );
psWarpOptions->padfSrcNoDataReal = (double *) CPLMalloc(sizeof(double) * nbands );
psWarpOptions->padfDstNoDataReal = (double *) CPLMalloc(sizeof(double) * nbands );
psWarpOptions->padfSrcNoDataImag = (double *) CPLMalloc(sizeof(double) * nbands );
psWarpOptions->padfDstNoDataImag = (double *) CPLMalloc(sizeof(double) * nbands );
GDALRasterBandH hBand;
int hasNA;
for (int i=0; i<nbands; i++) {
psWarpOptions->panSrcBands[i] = (int) srcbands[i]+1;
psWarpOptions->panDstBands[i] = (int) dstbands[i]+1;
hBand = GDALGetRasterBand(hSrcDS, srcbands[i]+1);
double naflag = GDALGetRasterNoDataValue(hBand, &hasNA);
if (hasNA) {
psWarpOptions->padfSrcNoDataReal[i] = naflag;
psWarpOptions->padfDstNoDataReal[i] = naflag;
hBand = GDALGetRasterBand(hDstDS, dstbands[i]+1);
GDALSetRasterNoDataValue(hBand, naflag);
} else {
psWarpOptions->padfSrcNoDataReal[i] = NAN;
psWarpOptions->padfDstNoDataReal[i] = NAN;
}
psWarpOptions->padfSrcNoDataImag[i] = 0;
psWarpOptions->padfDstNoDataImag[i] = 0;
}
//psWarpOptions->pfnProgress = GDALTermProgress;
psWarpOptions->papszWarpOptions =
CSLSetNameValue( psWarpOptions->papszWarpOptions, "INIT_DEST", "NO_DATA");
psWarpOptions->papszWarpOptions =
CSLSetNameValue( psWarpOptions->papszWarpOptions, "WRITE_FLUSH", "YES");
if (threads) {
psWarpOptions->papszWarpOptions =
CSLSetNameValue( psWarpOptions->papszWarpOptions, "NUM_THREADS", "ALL_CPUS");
}
psWarpOptions->pTransformerArg =
GDALCreateGenImgProjTransformer( hSrcDS, srccrs.c_str(),
hDstDS, GDALGetProjectionRef(hDstDS),
FALSE, 0.0, 1 );
psWarpOptions->pfnTransformer = GDALGenImgProjTransform;
return true;
}
/*
bool gdal_warper(GDALWarpOptions *psWarpOptions, GDALDatasetH &hSrcDS, GDALDatasetH &hDstDS) {
GDALWarpOperation oOperation;
if (oOperation.Initialize( psWarpOptions ) != CE_None) {
return false;
}
if (oOperation.ChunkAndWarpImage(0, 0, GDALGetRasterXSize(hDstDS), GDALGetRasterYSize(hDstDS)) != CE_None) {
return false;
}
return true;
}
*/
SpatRaster SpatRaster::warper(SpatRaster x, std::string crs, std::string method, bool mask, bool align, bool resample, SpatOptions &opt) {
size_t ns = nsrc();
bool fixext = false;
for (size_t j=0; j<ns; j++) {
if ((source[j].extset || source[j].flipped) && (!source[j].memory)) {
fixext = true;
break;
}
}
if (fixext) {
SpatRaster r = *this;
SpatOptions xopt(opt);
xopt.ncopies = std::max((size_t) 10, xopt.ncopies*2);
for (size_t j=0; j<ns; j++) {
if ((source[j].extset || source[j].flipped) && (!r.source[j].memory)) {
SpatRaster tmp(source[j]);
if (tmp.canProcessInMemory(xopt)) {
tmp.readAll();
} else {
tmp = tmp.writeTempRaster(opt);
}
r.source[j] = tmp.source[0];
}
}
return r.warper(x, crs, method, mask, align, resample, opt);
}
SpatRaster out = x.geometry(nlyr(), false, false);
if (!is_valid_warp_method(method)) {
out.setError("not a valid warp method");
return out;
}
std::string srccrs = getSRS("wkt");
if (resample) {
out.setSRS(srccrs);
}
out.setNames(getNames());
if ((method == "near") || (method == "mode")) {
out.source[0].hasColors = hasColors();
out.source[0].cols = getColors();
out.source[0].hasCategories = hasCategories();
out.source[0].cats = getCategories();
out.rgb = rgb;
out.rgblyrs = rgblyrs;
out.rgbtype = rgbtype;
}
if (hasTime()) {
out.source[0].hasTime = true;
out.source[0].timestep = getTimeStep();
out.source[0].timezone = getTimeZone();
out.source[0].time = getTime();
}
if (hasUnit()) {
out.source[0].hasUnit = true;
out.source[0].unit = getUnit();
}
bool use_crs = !crs.empty();
if (use_crs) {
align = false;
resample = false;
} else if (!hasValues()) {
std::string fname = opt.get_filename();
if (!fname.empty()) {
out.addWarning("raster has no values, not writing to file");
}
return out;
}
if (align) {
crs = out.getSRS("wkt");
}
if (!resample) {
if (srccrs.empty()) {
out.setError("input raster CRS not set");
return out;
}
}
lrtrim(crs);
SpatOptions sopt(opt);
if (use_crs || align) {
GDALDatasetH hSrcDS;
if (!open_gdal(hSrcDS, 0, false, sopt)) {
out.setError("cannot create dataset from source");
return out;
}
out.setSRS(crs);
if (!get_output_bounds(hSrcDS, srccrs, crs, out)) {
GDALClose( hSrcDS );
out.setError("cannot get output boundaries for the target crs");
return out;
}
GDALClose( hSrcDS );
} else if (!resample) {
OGRSpatialReference source, target;
const char *pszDefFrom = srccrs.c_str();
OGRErr erro = source.SetFromUserInput(pszDefFrom);
if (erro != OGRERR_NONE) {
out.setError("input crs is not valid");
return out;
}
std::string targetcrs = out.getSRS("wkt");
const char *pszDefTo = targetcrs.c_str();
erro = target.SetFromUserInput(pszDefTo);
if (erro != OGRERR_NONE) {
out.setError("output crs is not valid");
return out;
}
OGRCoordinateTransformation *poCT;
poCT = OGRCreateCoordinateTransformation(&source, &target);
if( poCT == NULL ) {
out.setError( "Cannot do this transformation" );
return(out);
}
OCTDestroyCoordinateTransformation(poCT);
}
if (align) {
SpatExtent e = out.getExtent();
e = x.align(e, "out");
out.setExtent(e, false, true, "");
std::vector<double> res = x.resolution();
out = out.setResolution(res[0], res[1]);
}
if (!hasValues()) {
return out;
}
SpatOptions mopt;
if (mask) {
mopt = opt;
opt = SpatOptions(opt);
}
opt.ncopies += 4;
if (!out.writeStart(opt, filenames())) {
return out;
}
std::string errmsg;
SpatExtent eout = out.getExtent();
// std::vector<bool> has_so = source[0].has_scale_offset;
// std::vector<double> scale = source[0].scale;
// std::vector<double> offset = source[0].offset;
// for (size_t i=1; i<ns; i++) {
// has_so.insert(has_so.end(), source[0].has_scale_offset.begin(), source[0].has_scale_offset.end());
// scale.insert(scale.end(), source[0].scale.begin(), source[0].scale.end());
// offset.insert(offset.end(), source[0].offset.begin(), source[0].offset.end());
// }
std::vector<bool> has_so(nlyr(), false);
std::vector<double> scale(nlyr(), 1);
std::vector<double> offset(nlyr(), 0);
double halfy = out.yres() / 2;
for (size_t i = 0; i < out.bs.n; i++) {
eout.ymax = out.yFromRow(out.bs.row[i]) + halfy;
eout.ymin = out.yFromRow(out.bs.row[i] + out.bs.nrows[i]-1) - halfy;
SpatRaster crop_out = out.crop(eout, "near", false, sopt);
GDALDatasetH hDstDS;
if (!crop_out.create_gdalDS(hDstDS, "", "MEM", false, NAN, has_so, scale, offset, sopt)) {
return crop_out;
}
int bandstart = 0;
for (size_t j=0; j<ns; j++) {
GDALDatasetH hSrcDS;
if (!open_gdal(hSrcDS, j, false, sopt)) {
out.setError("cannot create dataset from source");
if( hDstDS != NULL ) GDALClose( (GDALDatasetH) hDstDS );
return out;
}
std::vector<size_t> srcbands = source[j].layers;
std::vector<size_t> dstbands(srcbands.size());
std::iota (dstbands.begin(), dstbands.end(), bandstart);
bandstart += dstbands.size();
GDALWarpOptions *psWarpOptions = GDALCreateWarpOptions();
if (!set_warp_options(psWarpOptions, hSrcDS, hDstDS, srcbands, dstbands, method, srccrs, errmsg, opt.get_verbose(), opt.threads)) {
if (hDstDS != NULL ) GDALClose((GDALDatasetH) hDstDS);
out.setError(errmsg);
return out;
}
//ok = gdal_warper(psWarpOptions, hSrcDS, hDstDS);
bool ok=true;
GDALWarpOperation oOperation;
if (oOperation.Initialize(psWarpOptions) != CE_None) {
ok = false;
} else if (oOperation.ChunkAndWarpImage(0, 0, GDALGetRasterXSize(hDstDS), GDALGetRasterYSize(hDstDS)) != CE_None) {
ok = false;
}
GDALDestroyGenImgProjTransformer(psWarpOptions->pTransformerArg);
GDALDestroyWarpOptions(psWarpOptions);
if (hSrcDS != NULL) GDALClose((GDALDatasetH) hSrcDS);
if (!ok) {
if (hDstDS != NULL) GDALClose((GDALDatasetH) hDstDS);
out.setError("warp failure");
return out;
}
}
bool ok = crop_out.from_gdalMEM(hDstDS, false, true);
if (hDstDS != NULL) GDALClose((GDALDatasetH) hDstDS);
if (!ok) {
out.setError("cannot do this transformation (warp)");
return out;
}
// std::vector<double> v = crop_out.getValues(-1, opt);
// if (!out.writeBlock(v, i)) return out;
if (!out.writeBlock(crop_out.source[0].values, i)) return out;
}
out.writeStop();
if (mask) {
SpatVector v = dense_extent(true, true);
v = v.project(out.getSRS("wkt"), true);
if (v.nrow() > 0) {
out = out.mask(v, false, NAN, true, mopt);
} else {
out.addWarning("masking failed");
}
}
return out;
}
/*
SpatRaster SpatRaster::oldwarper(SpatRaster x, std::string crs, std::string method, bool mask, bool align, bool resample, SpatOptions &opt) {
size_t ns = nsrc();
bool fixext = false;
for (size_t j=0; j<ns; j++) {
if (source[j].extset && (!source[j].memory)) {
fixext = true;
break;
}
}
if (fixext) {
SpatRaster r = *this;
for (size_t j=0; j<ns; j++) {
if (r.source[j].extset && (!r.source[j].memory)) {
SpatRaster tmp(source[j]);
//if (tmp.canProcessInMemory(opt)) {
// tmp.readAll();
//} else {
tmp = tmp.writeTempRaster(opt);
r.source[j] = tmp.source[0];
}
}
return r.warper(x, crs, method, mask, align, resample, opt);
}
SpatRaster out = x.geometry(nlyr(), false, false);
if (!is_valid_warp_method(method)) {
out.setError("not a valid warp method");
return out;
}
std::string srccrs = getSRS("wkt");
if (resample) {
out.setSRS(srccrs);
}
out.setNames(getNames());
if (method == "near") {
out.source[0].hasColors = hasColors();
out.source[0].cols = getColors();
out.source[0].hasCategories = hasCategories();
out.source[0].cats = getCategories();
out.rgb = rgb;
out.rgblyrs = rgblyrs;
out.rgbtype = rgbtype;
}
if (hasTime()) {
out.source[0].hasTime = true;
out.source[0].timestep = getTimeStep();
out.source[0].timezone = getTimeZone();
out.source[0].time = getTime();
}
if (hasUnit()) {
out.source[0].hasUnit = true;
out.source[0].unit = getUnit();
}
bool use_crs = !crs.empty();
if (use_crs) {
align = false;
resample = false;
} else if (!hasValues()) {
std::string fname = opt.get_filename();
if (!fname.empty()) {
out.addWarning("raster has no values, not writing to file");
}
return out;
}
if (align) {
crs = out.getSRS("wkt");
}
if (!resample) {
if (srccrs.empty()) {
out.setError("input raster CRS not set");
return out;
}
}
lrtrim(crs);
SpatOptions sopt(opt);
if (use_crs || align) {
GDALDatasetH hSrcDS;
SpatRaster g = geometry(1);
if (!g.open_gdal(hSrcDS, 0, false, sopt)) {
out.setError("cannot create dataset from source");
return out;
}
out.setSRS(crs);
if (!get_output_bounds(hSrcDS, srccrs, crs, out)) {
GDALClose( hSrcDS );
out.setError("cannot get output boundaries");
return out;
}
GDALClose( hSrcDS );
} else if (!resample) {
OGRSpatialReference source, target;
const char *pszDefFrom = srccrs.c_str();
OGRErr erro = source.SetFromUserInput(pszDefFrom);
if (erro != OGRERR_NONE) {
out.setError("input crs is not valid");
return out;
}
std::string targetcrs = out.getSRS("wkt");
const char *pszDefTo = targetcrs.c_str();
erro = target.SetFromUserInput(pszDefTo);
if (erro != OGRERR_NONE) {
out.setError("output crs is not valid");
return out;
}
OGRCoordinateTransformation *poCT;
poCT = OGRCreateCoordinateTransformation(&source, &target);
if( poCT == NULL ) {
out.setError( "Cannot do this transformation" );
return(out);
}
OCTDestroyCoordinateTransformation(poCT);
}
if (align) {
SpatExtent e = out.getExtent();
e = x.align(e, "out");
out.setExtent(e, false, true, "");
std::vector<double> res = x.resolution();
out = out.setResolution(res[0], res[1]);
}
if (!hasValues()) {
return out;
}
SpatOptions mopt;
if (mask) {
mopt = opt;
opt = SpatOptions(opt);
}
opt.ncopies += 4;
if (!out.writeStart(opt, filenames())) {
return out;
}
std::string errmsg;
SpatExtent eout = out.getExtent();
std::vector<bool> has_so = source[0].has_scale_offset;
std::vector<double> scale = source[0].scale;
std::vector<double> offset = source[0].offset;
for (size_t i=1; i<ns; i++) {
has_so.insert(has_so.end(), source[0].has_scale_offset.begin(), source[0].has_scale_offset.end());
scale.insert(scale.end(), source[0].scale.begin(), source[0].scale.end());
offset.insert(offset.end(), source[0].offset.begin(), source[0].offset.end());
}
double halfy = out.yres() / 2;
for (size_t i = 0; i < out.bs.n; i++) {
eout.ymax = out.yFromRow(out.bs.row[i]) + halfy;
eout.ymin = out.yFromRow(out.bs.row[i] + out.bs.nrows[i]-1) - halfy;
SpatRaster crop_out = out.crop(eout, "near", false, sopt);
GDALDatasetH hDstDS;
if (!crop_out.create_gdalDS(hDstDS, "", "MEM", false, NAN, has_so, scale, offset, sopt)) {
return crop_out;
}
int bandstart = 0;
for (size_t j=0; j<ns; j++) {
GDALDatasetH hSrcDS;
if (!open_gdal(hSrcDS, j, false, sopt)) {
out.setError("cannot create dataset from source");
if( hDstDS != NULL ) GDALClose( (GDALDatasetH) hDstDS );
return out;
}
std::vector<size_t> srcbands = source[j].layers;
std::vector<size_t> dstbands(srcbands.size());
std::iota (dstbands.begin(), dstbands.end(), bandstart);
bandstart += dstbands.size();
GDALWarpOptions *psWarpOptions = GDALCreateWarpOptions();
bool ok = set_warp_options(psWarpOptions, hSrcDS, hDstDS, srcbands, dstbands, method, srccrs, errmsg, opt.get_verbose(), opt.threads);
if (!ok) {
if( hDstDS != NULL ) GDALClose( (GDALDatasetH) hDstDS );
out.setError(errmsg);
return out;
}
//ok = gdal_warper(psWarpOptions, hSrcDS, hDstDS);
GDALWarpOperation oOperation;
if (oOperation.Initialize( psWarpOptions ) != CE_None) {
ok = false;
} else if (oOperation.ChunkAndWarpImage(0, 0, GDALGetRasterXSize(hDstDS), GDALGetRasterYSize(hDstDS)) != CE_None) {
ok = false;
}
GDALDestroyGenImgProjTransformer( psWarpOptions->pTransformerArg );
GDALDestroyWarpOptions( psWarpOptions );
if( hSrcDS != NULL ) GDALClose( (GDALDatasetH) hSrcDS );
if (!ok) {
if( hDstDS != NULL ) GDALClose( (GDALDatasetH) hDstDS );
out.setError("warp failure");
return out;
}
}
bool ok = crop_out.from_gdalMEM(hDstDS, false, true);
if( hDstDS != NULL ) GDALClose( (GDALDatasetH) hDstDS );
if (!ok) {
out.setError("cannot do this transformation (warp)");
return out;
}
// std::vector<double> v = crop_out.getValues(-1, opt);
// if (!out.writeBlock(v, i)) return out;
if (!out.writeBlock(crop_out.source[0].values, i)) return out;
}
out.writeStop();
if (mask) {
SpatVector v = dense_extent(true, true);
v = v.project(out.getSRS("wkt"), true);
if (v.nrow() > 0) {
out = out.mask(v, false, NAN, true, mopt);
} else {
out.addWarning("masking failed");
}
}
return out;
}
*/
SpatRaster SpatRaster::warper_by_util(SpatRaster x, std::string crs, std::string method, bool mask, bool align, bool resample, SpatOptions &opt) {
size_t ns = nsrc();
bool fixext = false;
for (size_t j=0; j<ns; j++) {
if ((source[j].extset || source[j].flipped) && (!source[j].memory)) {
fixext = true;
break;
}
}
if (fixext) {
SpatRaster r = *this;
for (size_t j=0; j<ns; j++) {
if ((r.source[j].extset || r.source[j].flipped) && (!r.source[j].memory)) {
SpatRaster tmp(source[j]);
//if (tmp.canProcessInMemory(opt)) {
// tmp.readAll();
//} else {
tmp = tmp.writeTempRaster(opt);
r.source[j] = tmp.source[0];
}
}
return r.warper_by_util(x, crs, method, mask, align, resample, opt);
}
SpatRaster out = x.geometry(nlyr(), false, false);
if (!is_valid_warp_method(method)) {
out.setError("not a valid warp method");
return out;
}
std::string srccrs = getSRS("wkt");
if (resample) {
out.setSRS(srccrs);
}
out.setNames(getNames());
if ((method == "near") || (method == "mode")) {
out.source[0].hasColors = hasColors();
out.source[0].cols = getColors();
out.source[0].hasCategories = hasCategories();
out.source[0].cats = getCategories();
out.rgb = rgb;
out.rgblyrs = rgblyrs;
out.rgbtype = rgbtype;
}
if (hasTime()) {
out.source[0].hasTime = true;
out.source[0].timestep = getTimeStep();
out.source[0].timezone = getTimeZone();
out.source[0].time = getTime();
}
bool use_crs = !crs.empty();
if (use_crs) {
align = false;
resample = false;
} else if (!hasValues()) {
std::string fname = opt.get_filename();
if (!fname.empty()) {
out.addWarning("raster has no values, not writing to file");
}
return out;
}
if (align) {
crs = out.getSRS("wkt");
}