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read_gdal.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 <stdexcept>
#include <algorithm>
#include <stdint.h>
#include <vector>
//#include <regex>
//#include "spatRaster.h"
#include "spatRasterMultiple.h"
#include "vecmath.h"
#include "file_utils.h"
#include "string_utils.h"
#include "spatTime.h"
#include "recycle.h"
#include "gdalio.h"
//#include "NA.h"
#include "gdal_priv.h"
#include "cpl_conv.h" // for CPLMalloc()
#include "cpl_string.h"
#include "ogr_spatialref.h"
#include "gdal_rat.h"
//#include "hdr.h"
#if GDAL_VERSION_MAJOR >= 3
#include "proj.h"
#endif
void SpatRaster::gdalogrproj_init(std::string path) {
GDALAllRegister();
OGRRegisterAll();
//GDALregistred = true;
#if GDAL_VERSION_MAJOR >= 3
#ifdef PROJ_6
if (!path.empty()) {
const char *cp = path.c_str();
proj_context_set_search_paths(PJ_DEFAULT_CTX, 1, &cp);
}
#endif
#ifdef PROJ_71
#ifndef __EMSCRIPTEN__
proj_context_set_enable_network(PJ_DEFAULT_CTX, 1);
#endif
#endif
#endif
}
/*
bool GetTime(std::string filename, std::vector<int_64> &time, std::string ×tep, size_t nl) {
filename += ".time";
if (!file_exists(filename)) {
return false;
}
std::vector<std::string> s = read_text(filename);
if (nl != (s.size()-1)) return false;
time.reserve(nl);
timestep = s[0];
for (size_t i=0; i<nl; i++) {
time.push_back( parse_time(s[i+1]) );
}
return true;
}
bool GetUnits(std::string filename, std::vector<std::string> &units, size_t nl) {
filename += ".unit";
if (!file_exists(filename)) {
return false;
}
units = read_text(filename);
if (nl != units.size()) return false;
return true;
}
*/
bool read_aux_json(std::string filename, std::vector<int_64> &time, std::string ×tep, std::vector<std::string> &units, size_t nlyr) {
filename += ".aux.json";
if (!file_exists(filename)) return false;
std::vector<std::string> s = read_text(filename);
int itime=-1, istep=-1, iunit=-1;
for (size_t i=0; i<s.size(); i++) {
std::vector<std::string> x = strsplit_first(s[i], ":");
if (x.size() != 2) continue;
x[0].erase(std::remove(x[0].begin(), x[0].end(), '\"'), x[0].end());
if (x[0] == "time") itime = i;
if (x[0] == "timestep") istep = i;
if (x[0] == "unit") iunit = i;
}
if (itime >= 0) {
std::vector<std::string> x = strsplit_first(s[itime], "[");
if (x.size() == 2) {
x = strsplit(x[1], "]");
x = strsplit(x[0], ",");
std::vector<int_64> tm;
for (size_t i=0; i<x.size(); i++) {
unquote(x[i]);
tm.push_back( parse_time(x[i]) );
}
if (tm.size() == nlyr) {
time = tm;
}
}
if ((istep >= 0) && !time.empty()) {
std::vector<std::string> x = strsplit_first(s[istep], ":");
if (x.size() == 2) {
x = strsplit(x[1], ",");
unquote(x[0]);
timestep = x[0];
}
}
}
if (iunit >= 0) {
std::vector<std::string> x = strsplit_first(s[iunit], "[");
if (x.size() == 2) {
x = strsplit(x[1], "]");
x = strsplit(x[0], ",");
if (x.size() == nlyr) {
for (size_t i=0; i< x.size(); i++) {
unquote(x[i]);
}
units = x;
}
}
}
return false;
}
bool GetRAT(GDALRasterAttributeTable *pRAT, SpatCategories &cats, const std::string &driver) {
/*
const char *GFU_type_string[] = {"GFT_Integer", "GFT_Real","GFT_String"};
const char *GFU_usage_string[] = {"GFU_Generic", "GFU_PixelCount", "GFU_Name", "GFU_Min",
"GFU_Max", "GFU_MinMax", "GFU_Red", "GFU_Green", "GFU_Blue", "GFU_Alpha", "GFU_RedMin",
"GFU_GreenMin", "GFU_BlueMin", "GFU_AlphaMin", "GFU_RedMax", "GFU_GreenMax", "GFU_BlueMax",
"GFU_AlphaMax", "GFU_MaxCount"};
std::vector<std::string> GFT_type;
std::vector<std::string> GFT_usage;
*/
size_t nc = (int) pRAT->GetColumnCount();
size_t nr = (int) pRAT->GetRowCount();
std::vector<std::string> ss = {"histogram", "count", "red", "green", "blue", "alpha", "opacity", "r", "g", "b", "a"};
std::vector<std::string> ratnms;
std::vector<int> id, id2;
bool hasvalue=false;
for (size_t i=0; i<nc; i++) {
std::string name = pRAT->GetNameOfCol(i);
ratnms.push_back(name);
lowercase(name);
if (!hasvalue && ((name == "value") || (name == "id") || (name == "ids"))) {
id.insert(id.begin(), i);
hasvalue = true;
} else {
int k = where_in_vector(name, ss, false);
if (k >= 0) {
id2.push_back(i);
} else {
id.push_back(i);
}
}
}
bool good_rat = true;
size_t sid = id.size();
// Rcpp::Rcout << hasvalue << " " << sid << std::endl;
if ((hasvalue && sid == 1) || ((!hasvalue) && sid == 0)) {
// #790 avoid having just "count" or "histogram"
good_rat = false;
}
id.insert(id.end(), id2.begin(), id2.end());
if (driver == "AIG") {
std::vector<std::string> compnms = {"ID", "VALUE", "COUNT"};
if ((id.size() == 3) && (ratnms == compnms)) {
cats.index = -1;
return false;
}
}
if (!hasvalue) {
std::vector<long> vid(nr);
std::iota(vid.begin(), vid.end(), 0);
cats.d.add_column(vid, "value");
}
int first_string = -1;
for (size_t k=0; k<id.size(); k++) {
size_t i = id[k];
std::string name = pRAT->GetNameOfCol(i);
GDALRATFieldType nc_type = pRAT->GetTypeOfCol(i);
// GFT_type.push_back(GFU_type_string[nc_types[i]]);
// GDALRATFieldUsage nc_usage = pRAT->GetUsageOfCol(i);
// GFT_usage.push_back(GFU_usage_string[nc_usages[i]]);
if (nc_type == GFT_Integer) {
std::vector<long> d(nr);
for (size_t j=0; j<nr; j++) {
d[j] = (int) pRAT->GetValueAsInt(j, i);
}
cats.d.add_column(d, name);
} else if (nc_type == GFT_Real) {
std::vector<double> d(nr);
for (size_t j=0; j<nr; j++) {
d[j] = (double) pRAT->GetValueAsDouble(j, i);
}
cats.d.add_column(d, name);
} else if (nc_type == GFT_String) {
std::vector<std::string> d(nr);
for (size_t j=0; j<nr; j++) {
d[j] = (std::string) pRAT->GetValueAsString(j, i);
}
if (first_string < 0) first_string = cats.d.ncol();
cats.d.add_column(d, name);
}
}
if (cats.d.nrow() == 0) {
return false;
}
cats.index = good_rat ? (first_string >= 0 ? first_string :(cats.d.ncol() > 1 ? 1 : 0)) : -1;
return true;
}
bool GetVAT(std::string filename, SpatCategories &vat) {
filename += ".vat.dbf";
if (!file_exists(filename)) {
return false;
}
SpatVector v, fvct;
std::vector<double> fext;
v.read(filename, "", "", fext, fvct, false, "", {});
if (v.df.nrow() == 0) return false;
std::vector<std::string> nms = v.df.get_names();
std::vector<std::string> ss = {"count", "histogram"};
std::vector<unsigned> rng;
rng.reserve(nms.size());
for (size_t i=0; i<nms.size(); i++) {
int j = where_in_vector(nms[i], ss, true);
if (j < 0) rng.push_back(i);
}
if (rng.size() > 1) {
vat.d = v.df.subset_cols(rng);
// vat.d.names[0] = "ID";
vat.index = 1;
std::string sc = vat.d.names[1];
lowercase(sc);
if (sc == "count") {
if (rng.size() == 2) {
return false;
} else {
vat.index = 2;
}
}
return true;
}
return false;
}
SpatDataFrame GetCOLdf(GDALColorTable *pCT) {
SpatDataFrame out;
size_t nc = (int) pCT->GetColorEntryCount();
out.add_column(1, "value");
out.add_column(1, "red");
out.add_column(1, "green");
out.add_column(1, "blue");
out.add_column(1, "alpha");
out.reserve(nc);
for (size_t i=0; i<nc; i++) {
const GDALColorEntry * col = pCT->GetColorEntry(i);
out.iv[0].push_back(i);
out.iv[1].push_back(col->c1);
out.iv[2].push_back(col->c2);
out.iv[3].push_back(col->c3);
out.iv[4].push_back(col->c4);
}
return(out);
}
bool getIntFromDoubleCol(std::vector<double> & dv, std::vector<long> &iv) {
double dmn = vmin(dv, true);
if (dmn < 0) return false;
double dmx = vmax(dv, true);
if (dmx > 255) {
return false;
}
iv.resize(0);
iv.reserve(dv.size());
if (dmx <= 1) {
for (size_t i=0; i<dv.size(); i++) {
iv.push_back( dv[i] * 255 );
}
} else {
for (size_t i=0; i<dv.size(); i++) {
iv.push_back( dv[i] );
}
}
return true;
}
bool setIntCol(SpatDataFrame &d, SpatDataFrame &out, int k, std::string name) {
if (d.itype[k] == 0) {
std::vector<long> iv;
size_t j = d.iplace[k];
if (getIntFromDoubleCol(d.dv[j], iv)) {
out.add_column(iv, name);
} else {
return false;
}
} else if (d.itype[k] == 1) {
size_t j = d.iplace[k];
long dmn = vmin(d.iv[j], true);
if (dmn < 0) return false;
long dmx = vmax(d.iv[j], true);
if (dmx > 255) return false;
out.add_column(d.iv[j], name);
} else {
return false;
}
return true;
}
bool colsFromRat(SpatDataFrame &d, SpatDataFrame &out) {
if ((d.nrow() == 0) || (d.ncol() == 0)) {
return false;
}
std::vector<std::string> ss = d.get_names();
for (size_t i=0; i<ss.size(); i++) {
lowercase(ss[i]);
}
// int k = where_in_vector("value", ss, true);
// if (k >= 0) {
int k = 0;
size_t j = d.iplace[k];
if (d.itype[k] == 1) {
out.add_column(d.iv[j], "value");
} else if (d.itype[k] == 0) {
std::vector<long> x;
x.reserve(d.nrow());
for (size_t i=0; i<d.nrow(); i++) {
x.push_back(d.dv[j][i]);
}
out.add_column(x, "value");
} else {
return false;
}
std::vector<std::string> cols1 = {"red", "green", "blue"};
std::vector<std::string> cols2 = {"r", "g", "b"};
for (size_t i=0; i<3; i++) {
int k = where_in_vector(cols1[i], ss, true);
if (k >= 0) {
if (!setIntCol(d, out, k, cols1[i])) return false;
} else {
int k = where_in_vector(cols2[i], ss, true);
if (k >= 0) {
if (!setIntCol(d, out, k, cols1[i])) return false;
} else {
return false;
}
}
}
k = where_in_vector("alpha", ss, true);
if (k >= 0) {
setIntCol(d, out, k, "alpha");
} else {
int k = where_in_vector("transparency", ss, true);
if (k >= 0) {
setIntCol(d, out, k, "alpha");
} else {
int k = where_in_vector("opacity", ss, true);
if (k >= 0) {
setIntCol(d, out, k, "alpha");
} else {
std::vector<long> a(out.nrow(), 255);
out.add_column(a, "alpha");
}
}
}
return true;
}
/*
SpatDataFrame GetColFromRAT(SpatDataFrame &rat) {
SpatDataFrame out;
size_t nr = rat.nrow();
if (nr > 256) return out;
std::vector<std::string> nms = rat.get_names();
int red = where_in_vector("red", nms, false);
int green = where_in_vector("green", nms, false);
int blue = where_in_vector("blue", nms, false);
int alpha = where_in_vector("alpha", nms, true);
std::vector<unsigned> r {(unsigned)red, (unsigned)green, (unsigned)blue};
if (alpha >= 0) {
r.push_back(alpha);
}
out = rat.subset_cols(r);
if (alpha < 0) {
std::vector<long> a(nr, 255);
out.add_column(a, "alpha");
}
out.names = {"red", "green", "blue", "alpha"};
return out;
}
*/
SpatCategories GetCategories(char **pCat, std::string name) {
long n = CSLCount(pCat);
SpatCategories scat;
std::vector<long> id;
std::vector<std::string> nms;
id.reserve(n);
nms.reserve(n);
for (long i = 0; i<n; i++) {
const char *field = CSLGetField(pCat, i);
std::string s = field;
if (!s.empty()) {
id.push_back(i);
nms.push_back(field);
}
}
scat.d.add_column(id, "value");
name = name.empty() ? "category" : name;
scat.d.add_column(nms, name);
scat.index = 1;
return(scat);
}
std::string strend(std::string f, size_t n) {
n = std::min(n, f.length());
std::string end = f.substr(f.length() - n);
return end;
}
std::string basename_sds(std::string f) {
const size_t i = f.find_last_of("\\/");
if (std::string::npos != i) {
f.erase(0, i + 1);
}
// this may be incorrect of the variable name includes a ":" ?
const size_t j = f.find_last_of(':');
if (std::string::npos != j) {
f.erase(0, j + 1);
}
std::string end = strend(f, 3);
if ((end == ".h5") || (end == ".nc")) {
f.erase( f.end()-3, f.end() );
} else if (strend(f, 4) == ".hdf") {
f.erase( f.end()-4, f.end() );
}
f.erase(std::remove(f.begin(), f.end(), '"'), f.end());
/*
f = std::regex_replace(f, std::regex("\\.h5$"), "");
f = std::regex_replace(f, std::regex("\\.hdf$"), "");
f = std::regex_replace(f, std::regex("\\.nc$"), "");
f = std::regex_replace(f, std::regex("\""), "");
*/
return f;
}
std::string getDsWKT(GDALDataset *poDataset) {
std::string wkt = "";
#if GDAL_VERSION_MAJOR >= 3
const OGRSpatialReference *srs = poDataset->GetSpatialRef();
if (srs == NULL) return wkt;
char *cp;
const char *options[3] = { "MULTILINE=YES", "FORMAT=WKT2", NULL };
OGRErr err = srs->exportToWkt(&cp, options);
if (err == OGRERR_NONE) {
wkt = std::string(cp);
}
CPLFree(cp);
#else
if (poDataset->GetProjectionRef() != NULL) {
char *cp;
OGRSpatialReference oSRS(poDataset->GetProjectionRef());
#if GDAL_VERSION_MAJOR >= 3
const char *options[3] = { "MULTILINE=NO", "FORMAT=WKT2", NULL };
OGRErr err = oSRS.exportToWkt(&cp, options);
#else
OGRErr err = oSRS.exportToWkt(&cp);
#endif
if (err == OGRERR_NONE) {
wkt = std::string(cp);
}
CPLFree(cp);
}
#endif
return wkt;
}
std::string getDsPRJ(GDALDataset *poDataset) {
std::string prj = "";
#if GDAL_VERSION_MAJOR >= 3
const OGRSpatialReference *srs = poDataset->GetSpatialRef();
if (srs == NULL) return prj;
char *cp;
OGRErr err = srs->exportToProj4(&cp);
if (err == OGRERR_NONE) {
prj = std::string(cp);
}
CPLFree(cp);
#else
if( poDataset->GetProjectionRef() != NULL ) {
OGRSpatialReference oSRS(poDataset->GetProjectionRef());
char *pszPRJ = NULL;
oSRS.exportToProj4(&pszPRJ);
prj = pszPRJ;
}
#endif
return prj;
}
inline std::string dtypename(const std::string &d) {
if (d == "Float64") return "FLT8S";
if (d == "Float32") return "FLT4S";
if (d == "Int64") return "INT8S";
if (d == "Int32") return "INT4S";
if (d == "Int16") return "INT2S";
if (d == "Int8") return "INT1S";
if (d == "UInt64") return "INT8U";
if (d == "UInt32") return "INT4U";
if (d == "UInt16") return "INT2U";
if (d == "Byte") return "INT1U";
return "FLT4S";
}
void get_tags(std::vector<std::string> meta, std::string prefix, std::vector<std::string> &name, std::vector<std::string> &value) {
if (!meta.empty()) {
for (size_t i=0; i<meta.size(); i++) {
size_t tagpos = meta[i].find(prefix);
if (tagpos != std::string::npos) {
size_t pos = meta[i].find("=");
if (pos != std::string::npos) {
std::string mn = meta[i].substr(prefix.size(), pos-tagpos-prefix.size());
if (!((mn == "_FillValue") || (mn == "grid_mapping") || (mn == "Conventions") || (mn == "created_by") || (mn == "created_date"))) {
name.push_back(mn);
value.push_back(meta[i].substr(pos+1, meta[i].length()));
}
}
}
}
}
}
std::vector<std::string> get_metadata(std::string filename, std::vector<std::string> options) {
std::vector<std::string> metadata;
GDALDataset *poDataset = openGDAL(filename, GDAL_OF_RASTER | GDAL_OF_READONLY | GDAL_OF_VERBOSE_ERROR, {}, options);
if( poDataset == NULL ) {
return metadata;
}
char **m = poDataset->GetMetadata();
if (m) {
while (*m != nullptr) {
metadata.push_back(*m++);
}
}
GDALClose( (GDALDatasetH) poDataset );
return metadata;
}
SpatRasterStack::SpatRasterStack(std::string fname, std::vector<int> ids, bool useids, std::vector<std::string> options) {
GDALDataset *poDataset = openGDAL(fname, GDAL_OF_RASTER | GDAL_OF_READONLY | GDAL_OF_VERBOSE_ERROR, {}, {});
if( poDataset == NULL ) {
if (!file_exists(fname)) {
setError("file does not exist: " + fname);
} else {
setError("cannot read from " + fname );
}
return;
}
std::string delim = "NAME=";
char **metadata = poDataset->GetMetadata("SUBDATASETS");
if (metadata == NULL) {
setError("file has no subdatasets");
GDALClose( (GDALDatasetH) poDataset );
return;
}
std::vector<std::string> meta;
for (size_t i=0; metadata[i] != NULL; i++) {
meta.push_back(metadata[i]);
}
if (!useids) {
ids.resize(meta.size());
std::iota(ids.begin(), ids.end(), 0);
}
int idssz = ids.size();
int metsz = meta.size();
if (metsz == 0) {
setError("file does not consist of subdatasets");
} else {
for (int i=0; i<idssz; i++) {
if ((ids[i] < 0) || ((2*ids[i]) >= metsz)) {
continue;
}
std::string s = meta[ids[i]*2];
size_t pos = s.find(delim);
if (pos != std::string::npos) {
s.erase(0, pos + delim.length());
SpatRaster sub;
if (sub.constructFromFile(s, {-1}, {""}, {}, options)) {
std::string sname = sub.source[0].source_name.empty() ? basename_sds(s) : sub.source[0].source_name;
if (!push_back(sub, sname, sub.source[0].source_name_long, sub.source[0].unit[0], true)) {
addWarning("skipped (different geometry): " + s);
}
} else {
addWarning("skipped (fail): " + s);
}
}
}
}
meta.resize(0);
char **m = poDataset->GetMetadata();
if (m) {
while (*m != nullptr) {
meta.push_back(*m++);
}
}
GDALClose( (GDALDatasetH) poDataset );
std::vector<std::string> tagnames, tagvalues;
// get_tags(meta, "NC_GLOBAL#TAG_", tagnames, tagvalues);
get_tags(meta, "NC_GLOBAL#", tagnames, tagvalues);
for (size_t i=0; i<tagnames.size(); i++) addTag(tagnames[i], tagvalues[i]);
}
SpatRasterCollection::SpatRasterCollection(std::string fname, std::vector<int> ids, bool useids, std::vector<std::string> options) {
// std::vector<std::string> ops;
GDALDataset *poDataset = openGDAL(fname, GDAL_OF_RASTER | GDAL_OF_READONLY | GDAL_OF_VERBOSE_ERROR, {}, {});
if( poDataset == NULL ) {
if (!file_exists(fname)) {
setError("file does not exist: " + fname);
} else {
setError("cannot read from " + fname );
}
return;
}
std::string delim = "NAME=";
char **metadata = poDataset->GetMetadata("SUBDATASETS");
if (metadata == NULL) {
setError("file has no subdatasets");
GDALClose( (GDALDatasetH) poDataset );
return;
}
std::vector<std::string> meta;
for (size_t i=0; metadata[i] != NULL; i++) {
meta.push_back(metadata[i]);
}
if (!useids) {
ids.resize(meta.size());
std::iota(ids.begin(), ids.end(), 0);
}
int idssz = ids.size();
int metsz = meta.size();
if (metsz == 0) {
setError("file does not consist of subdatasets");
} else {
for (int i=0; i<idssz; i++) {
if ((ids[i] < 0) || ((2*ids[i]) >= metsz)) {
continue;
}
std::string s = meta[ids[i]*2];
size_t pos = s.find(delim);
if (pos != std::string::npos) {
s.erase(0, pos + delim.length());
SpatRaster sub;
if (sub.constructFromFile(s, {-1}, {""}, {}, options)) {
push_back(sub, basename_sds(s));
} else {
addWarning("skipped (fail): " + s);
}
}
}
}
meta.resize(0);
char **m = poDataset->GetMetadata();
if (m) {
while (*m != nullptr) {
meta.push_back(*m++);
}
}
GDALClose( (GDALDatasetH) poDataset );
std::vector<std::string> tagnames, tagvalues;
// get_tags(meta, "NC_GLOBAL#TAG_", tagnames, tagvalues);
get_tags(meta, "NC_GLOBAL#", tagnames, tagvalues);
for (size_t i=0; i<tagnames.size(); i++) addTag(tagnames[i], tagvalues[i]);
}
/*
SpatRaster SpatRaster::fromFiles(std::vector<std::string> fname, std::vector<int> subds, std::vector<std::string> subdsname, std::vector<std::string> drivers, std::vector<std::string> options) {
SpatRaster out;
out.constructFromFile(fname[0], subds, subdsname, options);
if (out.hasError()) return out;
SpatOptions opt;
for (size_t i=1; i<fname.size(); i++) {
SpatRaster r;
bool ok = r.constructFromFile(fname[i], subds, subdsname, drivers, options);
if (r.msg.has_warning) {
out.addWarning(r.msg.warnings[0]);
}
if (ok) {
out.addSource(r, false, opt);
if (r.msg.has_error) {
out.setError(r.msg.error);
return out;
}
} else {
if (r.msg.has_error) {
out.setError(r.msg.error);
}
return out;
}
}
return out;
}
*/
bool getGCPs(GDALDataset *poDataset, SpatRasterSource &s) {
int n = poDataset->GetGCPCount();
// Rcpp::Rcout << "n GCP " << n << std::endl;
if (n == 0) return false;
const GDAL_GCP *gcp;
gcp = poDataset->GetGCPs();
double adfGeoTransform[6];
if (GDALGCPsToGeoTransform(n, gcp, adfGeoTransform, true)) {
//for (size_t i=0; i<6; i++) {
// Rcpp::Rcout << adfGeoTransform[i] << " ";
//}
//Rcpp::Rcout << std::endl;
double xmin = adfGeoTransform[0]; /* left x */
double xmax = xmin + adfGeoTransform[1] * s.ncol; /* w-e resolution */
if (xmin > xmax) {
std::swap(xmin, xmax);
}
double ymax = adfGeoTransform[3]; // top y
double ymin = ymax + s.nrow * adfGeoTransform[5];
if (adfGeoTransform[5] > 0) {
s.flipped = true;
std::swap(ymin, ymax);
}
SpatExtent e(xmin, xmax, ymin, ymax);
s.extent = e;
if (adfGeoTransform[2] != 0 || adfGeoTransform[4] != 0) {
s.rotated = true;
}
return true;
}
return false;
}
bool SpatRaster::constructFromFile(std::string fname, std::vector<int> subds, std::vector<std::string> subdsname, std::vector<std::string> drivers, std::vector<std::string> options) {
if (fname == "WCS:") {
// for https://github.com/rspatial/terra/issues/1505
setError("no raster data in WCS:");
return false;
}
std::vector<std::string> clean_ops = options;
bool app_so = true;
size_t opsz = options.size();
if (opsz > 0) {
if (options[opsz-1] == "so=false") {
app_so = false;
clean_ops.resize(opsz-1);
}
}
GDALDataset *poDataset = openGDAL(fname, GDAL_OF_RASTER | GDAL_OF_READONLY | GDAL_OF_VERBOSE_ERROR, drivers, clean_ops);
if( poDataset == NULL ) {
if (!file_exists(fname)) {
setError("file does not exist: " + fname);
} else {
setError("cannot open this file as a SpatRaster: " + fname);
}
return false;
}
int nl = poDataset->GetRasterCount();
std::string gdrv = poDataset->GetDriver()->GetDescription();
char **metasds = poDataset->GetMetadata("SUBDATASETS");
if (metasds != NULL) {
std::vector<std::string> meta;
for (size_t i=0; metasds[i] != NULL; i++) {
meta.push_back(metasds[i]);
}
GDALClose( (GDALDatasetH) poDataset );
return constructFromSDS(fname, meta, subds, subdsname, options, gdrv);
} else if (nl==0) {
setError("no raster data in " + fname);
return false;
}
char **meterra = poDataset->GetMetadata("USER_TAGS");
if (meterra != NULL) {
std::vector<std::string> meta;
for (size_t i=0; meterra[i] != NULL; i++) {
std::string s = meterra[i];
size_t pos = s.find("=");
if (pos != std::string::npos) {
std::string name = s.substr(0, pos);
std::string value = s.substr(pos+1);
addTag(name, value);
}
}
}
SpatRasterSource s;
char **metasrc = poDataset->GetMetadata();
while (metasrc != nullptr && *metasrc != nullptr) {
s.smdata.push_back(*metasrc++);
}
s.ncol = poDataset->GetRasterXSize();
s.nrow = poDataset->GetRasterYSize();
s.nlyr = nl;
s.nlyrfile = nl;
s.resize(nl);
s.flipped = false;
s.rotated = false;
double adfGeoTransform[6];
bool hasExtent = true;
if( poDataset->GetGeoTransform( adfGeoTransform ) == CE_None ) {
double xmin = adfGeoTransform[0]; /* left x */
double xmax = xmin + adfGeoTransform[1] * s.ncol; /* w-e resolution */
//xmax = roundn(xmax, 9);
double ymax = adfGeoTransform[3]; // top y
double ymin = ymax + s.nrow * adfGeoTransform[5];
//ymin = roundn(ymin, 9);
if (adfGeoTransform[5] > 0) {
Rcpp::Rcout << "flipped\n";
s.flipped = true;
std::swap(ymin, ymax);
}
SpatExtent e(xmin, xmax, ymin, ymax);
s.extent = e;
if (adfGeoTransform[2] != 0 || adfGeoTransform[4] != 0) {
s.rotated = true;
addWarning("the data in this file are rotated. Use 'rectify' to fix that");
}
} else if (getGCPs(poDataset, s)) {
if (s.rotated) {
addWarning("the data in this file are rotated. Use 'rectify' to fix that");
}
} else {
hasExtent = false;
if (adfGeoTransform[5] > 0) {
s.flipped = true;
}
SpatExtent e(0, s.ncol, 0, s.nrow);
s.extent = e;
if ((gdrv=="netCDF") || (gdrv == "HDF5")) {
#ifndef standalone
setMessage("ncdf extent");
#else
addWarning("unknown extent. Cells not equally spaced?");
#endif
} else {
addWarning("unknown extent");
}
// seems to cause more harm then benefit #1627
//try {
// s.flipped = adfGeoTransform[5] > 0;
//} catch(...) {}
}
s.memory = false;
s.filename = fname;
s.open_ops = options;
//s.open_drivers = {gdrv}; // failed for some hdf
s.open_drivers = drivers;
//s.driver = "gdal";
/*
if( poDataset->GetProjectionRef() != NULL ) {
OGRSpatialReference oSRS(poDataset->GetProjectionRef());
char *pszPRJ = NULL;
oSRS.exportToProj4(&pszPRJ);
s.crs = pszPRJ;
} else {
s.crs = "";
}
*/
std::string crs = getDsWKT(poDataset);
if (crs.empty()) {
if (hasExtent && s.extent.xmin >= -180 && s.extent.xmax <= 360 && s.extent.ymin >= -90 && s.extent.ymax <= 90) {
crs = "OGC:CRS84";
s.parameters_changed = true;
}
}
std::string msg;
if (!s.srs.set(crs, msg)) {
addWarning(msg);
}
GDALRasterBand *poBand;
//int nBlockXSize, nBlockYSize;
double adfMinMax[2];
int bGotMin, bGotMax;
// s.layers.resize(1);
// std::string unit = "";
s.source_name = basename_noext(fname);
std::vector<std::vector<std::string>> bandmeta(s.nlyr);
bool getCols = s.nlyr == 3;