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extract.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 <functional>
#include "spatRasterMultiple.h"
#include "vecmath.h"
#include "vecmathse.h"
#include "geosphere.h"
#include "sort.h"
#include "math_utils.h"
void SpatRaster::readRowColBlock(size_t src, std::vector<std::vector<double>> &out, size_t outstart, std::vector<int_64> &rows, std::vector<int_64> &cols, SpatOptions &opt) {
std::vector<std::vector<double>> errout;
if (source[src].rotated) {
setError("cannot read from rotated files. First use 'rectify'");
return;
}
SpatRaster rs(source[src]);
size_t nl = rs.nlyr();
size_t nc = rs.ncol();
size_t n = rows.size();
BlockSize bs = getBlockSize(opt);
/*
std::vector<std::pair<int_64, int_64>> rowcol;
rowcol.reserve(rows.size());
for (size_t i=0; i < rows.size(); i++) {
rowcol.push_back(std::make_pair(rows[i], cols[i]));
}
std::vector<std::size_t> pm = sort_order_a(rowcol);
permute(rows, pm);
permute(cols, pm);
*/
//for (size_t i=0; i<bs.n; i++) Rcpp::Rcout << bs.row[i] << " " << bs.nrows[i] << "; ";
//Rcpp::Rcout << std::endl;
std::vector<int_64> urows = vunique(rows);
std::vector<bool> useblock(bs.n, false);
size_t jj = 0;
for (size_t i=0; i<bs.n; i++) {
int_64 st = bs.row[i];
int_64 ed = bs.row[i] + bs.nrows[i] - 1;
for (size_t j=jj; j<urows.size(); j++) {
if ((urows[j] >= st) && (urows[j] <= ed)) {
useblock[i] = true;
bs.row[i] = urows[j];
for (size_t k=j; k<urows.size(); k++) {
if (urows[k] > ed) {
jj = k;
break;
} else {
bs.nrows[i] = urows[k]-urows[j]+1;
}
}
break;
}
}
}
bs.nrows[bs.n-1] = urows[urows.size()-1] - bs.row[bs.n-1] + 1;
//for (size_t i=0; i<bs.n; i++) Rcpp::Rcout << bs.row[i] << " " << bs.nrows[i] << "; ";
//Rcpp::Rcout << std::endl;
if (!rs.readStart()) {
setError(getError());
return;
}
size_t outend = outstart + nl;
// std::vector<std::vector<double>> out(nl, std::vector<double>(n, NAN));
for (size_t k=outstart; k<outend; k++) {
out[k] = std::vector<double>(n, NAN);
}
for (size_t i=0; i<bs.n; i++) {
if (!useblock[i]) continue;
std::vector<double> v;
rs.readBlock(v, bs, i);
int_64 rstart = bs.row[i];
int_64 rend = bs.row[i] + bs.nrows[i];
size_t off1 = bs.nrows[i] * nc;
for (size_t j=0; j<n; j++) {
// if (rows[j] >= rend) break; // if rows are sorted
if ((rows[j] >= rstart) && (rows[j] < rend)) {
size_t cell = (rows[j]-rstart) * nc + cols[j];
for (size_t lyr=0; lyr<nl; lyr++) {
out[outstart + lyr][j] = v[cell+lyr * off1];
}
}
}
}
rs.readStop();
/*
pm = sort_order_a(pm);
for (size_t i=0; i<out.size(); i++) {
permute(out[i], pm);
}
*/
// return out;
}
/*
std::vector<double> SpatRaster::readRowColBlockFlat(size_t src, std::vector<int_64> &rows, std::vector<int_64> &cols) {
std::vector<double> errout;
if (source[src].rotated) {
setError("cannot read from rotated files. First use 'rectify'");
return errout;
}
std::vector<std::vector<double>> v = readRowColBlock(src, rows, cols);
size_t nr = v[0].size();
size_t nl = v.size();
std::vector<double> out;
out.reserve(nl * nr);
for (size_t i=0; i<nr; i++) {
for (size_t j=0; j<nl; j++) {
out.push_back(v[j][i]);
}
}
return out;
}
*/
std::vector<double> circ_dist(double xres, double yres, double d, size_t nrows, size_t ncols, std::vector<size_t> &dim, bool lonlat, double ymean) {
size_t nx, ny;
std::string crs;
if (lonlat) {
deg2rad(ymean);
double xr = xres;
double yr = yres;
deg2rad(xr);
deg2rad(yr);
double dx = distance_cos(0, ymean, xr, ymean);
double dy = distance_cos(0, ymean-0.5*yr, 0, ymean+0.5*yr);
nx = 1 + 2 * floor(d/dx);
ny = 1 + 2 * floor(d/dy);
crs = "+proj=longlat";
} else {
nx = 1 + 2 * floor(d/xres);
ny = 1 + 2 * floor(d/yres);
crs = "+proj=utm +zone=1";
}
nx = std::min(nx, ncols);
ny = std::min(ny, nrows);
if ((nx == 1) || (ny == 1)) {
dim = {1, 1};
std::vector<double> out{1};
return out;
}
dim = {ny, nx};
SpatRaster x({ny, nx, 1}, {0., nx * xres, 0., ny * yres}, crs);
std::vector<double> v(nx*ny, NAN);
v[v.size()/2] = 1;
SpatOptions opt;
x.setValues(v, opt);
x = x.distance(NAN, NAN, false, "m", false, "cosine", false, -1, opt);
std::vector<double> out;
x.getValuesSource(0, out);
out[out.size()/2] = 1;
/*
for (size_t i=0; i<ny; i++) {
for (size_t j=0; j<nx; j++) {
Rcpp::Rcout << out[i*nx+j] << " ";
}
Rcpp::Rcout << std::endl;
}
*/
return out;
}
std::vector<std::vector<double>> SpatRaster::extractBuffer(const std::vector<double> &x, const std::vector<double> &y, double b, SpatOptions &opt) {
std::vector<std::vector<double>> out;
if (!hasValues()) {
setError("the raster has no values");
return out;
}
if (nlyr() > 1) {
setError("can only use a search_radius for one layer at a time");
return out;
}
std::vector<size_t> dim;
std::vector<double> cd;
double ymean = 0;
bool lonlat = is_lonlat();
if (lonlat) {
ymean = vmean(y, true);
}
std::vector<double> cb = circ_dist(xres(), yres(), b, nrow(), ncol(), dim, lonlat, ymean);
bool docb = false;
std::vector<bool> adj(cb.size(), false);
if (cb.size() > 1) {
cd.reserve(cb.size() * .67);
for (size_t i=0; i<cb.size(); i++) {
if (cb[i] <= b) {
adj[i] = true;
cd.push_back(cb[i]);
}
}
docb = true;
} else {
}
std::vector<double> cells = cellFromXY(x, y);
std::vector<std::vector<double>> v = extractCell(cells, opt);
std::vector<double> bestcell = cells;
std::vector<double> bestdist(cells.size());
std::vector<std::size_t> pm = sort_order_a(cd);
permute(cd, pm);
if (docb) {
size_t n = x.size();
for (size_t i=0; i<n; i++) {
if (std::isnan(v[0][i]) && (!std::isnan(cells[i]))) {
std::vector<double> acells = adjacentMat({cells[i]}, adj, dim, false);
permute(acells, pm);
std::vector<std::vector<double>> vv = extractCell(acells, opt);
// take the first nearest. Instead could average over the cells with same distance
for (size_t j=0; j<vv[0].size(); j++) {
if (!std::isnan(vv[0][j])) {
v[0][i] = vv[0][j];
bestdist[i] = cd[j];
bestcell[i] = acells[j];
break;
}
}
}
}
}
out.push_back(v[0]);
out.push_back(bestdist);
out.push_back(bestcell);
return out;
}
void SpatRaster::fourCellsFromXY(std::vector<double> &out, const std::vector<double> &x, const std::vector<double> &y) {
size_t n = x.size();
SpatExtent e = getExtent();
out.resize(0);
out.reserve(4*n);
double xmin = e.xmin;
double xmax = e.xmax;
double xr = xres();
double ymin = e.ymin;
double ymax = e.ymax;
double yr = yres();
double nc = ncol();
int_64 mxr = nrow()-1;
int_64 mxc = ncol()-1;
int_64 r1, r2, c1, c2;
std::vector<double> bad = {NAN, NAN, NAN, NAN};
for (size_t i = 0; i < n; i++) {
if (y[i] < ymin || y[i] > ymax || x[i] < xmin || x[i] > xmax) {
out.insert(out.end(), bad.begin(), bad.end());
continue;
}
if (y[i] == ymin) {
r1 = mxr;
r2 = mxr;
} else {
double p = (ymax - y[i]) / yr;
r1 = trunc(p);
if ((p - r1) > 0.5) {
r2 = r1 == mxr ? mxr : r1 + 1;
} else {
r2 = r1;
r1 = r1 == 0 ? 0 : r1 - 1;
}
}
if (x[i] == xmax) {
c1 = mxc;
c2 = mxc;
} else {
double p = (x[i] - xmin) / xr;
c1 = trunc(p);
if ((p - c1) > 0.5) {
c2 = c1 == mxc ? mxc : c1 + 1;
} else {
c2 = c1;
c1 = c2 == 0 ? 0 : c2 - 1;
}
}
out.push_back(r1 * nc + c1);
out.push_back(r1 * nc + c2);
out.push_back(r2 * nc + c1);
out.push_back(r2 * nc + c2);
}
}
std::vector<double> return_NAN(bool weights) {
if (weights) {
return std::vector<double>(4, NAN);
}
return std::vector<double>(1, NAN);
}
std::vector<double> bilinearInt(const double& x, const double& y,
const double& x1, const double& x2, const double& y1, const double& y2,
double& v11, double& v12, double& v21, double& v22, bool weights) {
bool n1 = std::isnan(v11);
bool n2 = std::isnan(v12);
bool n3 = std::isnan(v21);
bool n4 = std::isnan(v22);
double dx = (x2 - x1);
bool intx = dx > 0;
double dy = (y1 - y2);
bool inty = dy > 0;
double w11, w12, w21, w22;
if (std::isnan(x) || std::isnan(y) || (n1 && n2 && n3 && n4)) {
return return_NAN(weights);
}
if (weights) {
v11 = 1;
v12 = 1;
v21 = 1;
v22 = 1;
}
if (intx && inty) {
double d = dx * dy;
if (!(n1 || n2 || n3 || n4)){
w11 = v11 * ((x2 - x) * (y - y2)) / d;
w12 = v12 * ((x - x1) * (y - y2)) / d;
w21 = v21 * ((x2 - x) * (y1 - y)) / d;
w22 = v22 * ((x - x1) * (y1 - y)) / d;
} else if (!(n1 || n2 || n3)){
w11 = v11 * ((x2 - x) * (y - y2)) / d;
w12 = v12 * ((x - x1) * (y - y2)) / d;
w21 = v21 * ((y1 - y)) / dy;
w22 = 0;
} else if (!(n1 || n2 || n4)){
w11 = v11 * ((x2 - x) * (y - y2)) / d;
w12 = v12 * ((x - x1) * (y - y2)) / d;
w21 = 0;
w22 = v22 * ((y1 - y)) / dy;
} else if (!(n1 || n2 || n3)){
w11 = v11 * ((x2 - x) * (y - y2)) / d;
w12 = v12 * ((x - x1) * (y - y2)) / d;
w21 = v21 * ((y1 - y)) / dy;
w22 = 0;
} else if (!(n1 || n3 || n4)){
w11 = v11 * ((y - y2)) / dy;
w12 = 0;
w21 = v21 * ((x2 - x) * (y1 - y)) / d;
w22 = v22 * ((x - x1) * (y1 - y)) / d;
} else if (!(n2 || n3 || n4)){
w11 = 0;
w12 = v12 * ((y - y2)) / dy;
w21 = v21 * ((x2 - x) * (y1 - y)) / d;
w22 = v22 * ((x - x1) * (y1 - y)) / d;
} else if (!(n1 || n2 )){
w11 = v11 * ((x2 - x)) / dx;
w12 = v12 * ((x - x1)) / dx;
w21 = 0;
w22 = 0;
} else if (!(n1 || n3)){
w11 = v11 * ((y - y2)) / dy;
w12 = 0;
w21 = v21 * ((y1 - y)) / dy;
w22 = 0;
} else if (!(n1 || n4)){
w11 = v11 * ((y - y2)) / dy;
w12 = 0;
w21 = 0;
w22 = v22 * ((y1 - y)) / dy;
} else if (!(n2 || n3)){
w11 = 0;
w12 = v12 * ((y - y2)) / dy;
w21 = v21 * ((y1 - y)) / dy;
w22 = 0;
} else if (!(n2 || n4)){
w11 = 0;
w12 = v12 * ((y - y2)) / dy;
w21 = 0;
w22 = v22 * ((y1 - y)) / dy;
} else if (!(n3 || n4)){
w11 = 0;
w12 = 0;
w21 = v21 * ((x2 - x)) / dx;
w22 = v22 * ((x - x1)) / dx;
} else if (!n1){
w11 = v11;
w12 = 0;
w21 = 0;
w22 = 0;
} else if (!n2){
w11 = 0;
w12 = v12;
w21 = 0;
w22 = 0;
} else if (!n3){
w11 = 0;
w12 = 0;
w21 = v21;
w22 = 0;
} else if (!n4){
w11 = 0;
w12 = 0;
w21 = 0;
w22 = v22;
} else {
return return_NAN(weights);
}
} else if (intx) {
w21 = 0.0;
w22 = 0.0;
if (!(n1 || n2)) {
w11 = v11 * (x2 - x) / dx;
w12 = v12 * (x - x1) / dx;
} else if (!n1) {
w11 = v11;
w12 = 0.0;
} else if (!n2){
w11 = 0.0;
w12 = v12;
} else {
return return_NAN(weights);
}
} else if (inty) {
w12 = 0.0;
w22 = 0.0;
if (!(n1 || n3)) {
w11 = v11 * (y - y2) / dy;
w21 = v21 * (y1 - y) / dy;
} else if (!n1) {
w11 = v11;
w21 = 0;
} else if (!n3) {
w11 = 0;
w21 = v21;
} else{
return return_NAN(weights);
}
} else {
w11 = v11;
w21 = 0.0;
w12 = 0.0;
w22 = 0.0;
}
if (weights) {
return std::vector<double>{ w11, w12, w21, w22 };
}
return std::vector<double>{ w11 + w12 + w21 + w22 };
}
void SpatRaster::bilinearValues(std::vector<std::vector<double>> &out, const std::vector<double> &x, const std::vector<double> &y, SpatOptions &opt) {
std::vector<double> four;
fourCellsFromXY(four, x, y);
std::vector<std::vector<double>> xy = xyFromCell(four);
std::vector<std::vector<double>> v = extractCell(four, opt);
size_t n = x.size();
out.resize(nlyr(), std::vector<double>(n));
for (size_t i=0; i<n; i++) {
size_t ii = i * 4;
for (size_t j=0; j<nlyr(); j++) {
// Rcpp::Rcout << xy[0][ii] << " " << xy[0][ii+1] << " " << xy[0][ii+2] << " " << xy[0][ii+3] << std::endl;
// Rcpp::Rcout << xy[1][ii] << " " << xy[1][ii+1] << " " << xy[1][ii+2] << " " << xy[1][ii+3] << std::endl;
std::vector<double> value = bilinearInt(x[i], y[i], xy[0][ii], xy[0][ii+1], xy[1][ii], xy[1][ii+3],
v[j][ii], v[j][ii+1], v[j][ii+2], v[j][ii+3], false);
out[j][i] = value[0];
}
}
}
std::vector<double> SpatRaster::bilinearCells(const std::vector<double> &x, const std::vector<double> &y) {
std::vector<double> four;
fourCellsFromXY(four, x, y);
std::vector<std::vector<double>> xy = xyFromCell(four);
// std::vector<std::vector<double>> v = extractCell(four);
size_t n = x.size();
std::vector<double> res;
res.reserve(n * 8);
double v1=1, v2=1, v3=1, v4=1;
for (size_t i=0; i<n; i++) {
size_t ii = i * 4;
//size_t j=0;
std::vector<double> w = bilinearInt(x[i], y[i], xy[0][ii], xy[0][ii+1], xy[1][ii], xy[1][ii+3], v1, v2, v3, v4, true);
res.insert(res.end(), four.begin()+ii, four.begin()+ii+4);
res.insert(res.end(), w.begin(), w.end());
}
return res;
}
double bilinear(const std::vector<double> &v, const std::vector<double> &e, const double &dxdy, const double &x, const double &y) {
// values
// v[0] v[1]
// v[2] v[3]
// coordinates
// e[3] (ymax)
// (xmin)e[0] e[1] (xmax)
// e[2] (ymin)
double dx1 = x - e[0];
double dx2 = e[1] - x;
double dy1 = y - e[2];
double dy2 = e[3] - y;
return (v[2] * dx2 * dy2 + v[3] * dx1 * dy2 + v[0] * dx2 * dy1 + v[1] * dx1 * dy1) / dxdy;
}
std::vector<double> SpatRaster::line_cells(SpatGeom& g) {
unsigned nrows = nrow();
unsigned ncols = ncol();
SpatExtent extent = getExtent();
double xmin = extent.xmin;
double ymax = extent.ymax;
double rx = xres();
double ry = yres();
std::vector<double> out;
unsigned np = g.size();
for (size_t prt=0; prt<np; prt++) {
SpatPart p = g.getPart(prt);
double miny = vmin(p.y, true);
double maxy = vmax(p.y, true);
double minrow = rowFromY(miny);
double maxrow = rowFromY(maxy);
if (minrow > nrows || maxrow < 0) {
return(out);
}
size_t startrow = minrow < 0 ? 0 : minrow;
size_t endrow = maxrow >= nrows ? (nrows-1) : maxrow;
unsigned n = p.x.size();
out.reserve(2*(startrow-endrow+1));
for (size_t row=startrow; row<endrow; row++) {
double y = ymax - (row+0.5) * ry;
unsigned rowcell = ncols * row;
for (size_t i=1; i<n; i++) {
size_t j = i-1;
if (((p.y[i] < y) && (p.y[j] >= y)) || ((p.y[j] < y) && (p.y[i] >= y))) {
double col = ((p.x[i] - xmin + (y-p.y[i])/(p.y[j]-p.y[i]) * (p.x[j]-p.x[i])) + 0.5 * rx ) / rx;
if ((col >= 0) & (col < ncols)) {
out.push_back(rowcell + col);
}
}
}
}
}
return(out);
}
std::vector<double> SpatRaster::polygon_cells(SpatGeom& g) {
// does not deal with holes yet.
unsigned nrows = nrow();
unsigned ncols = ncol();
SpatExtent extent = getExtent();
double xmin = extent.xmin;
double ymax = extent.ymax;
double rx = xres();
double ry = yres();
std::vector<double> out;
unsigned np = g.size();
for (size_t prt=0; prt<np; prt++) {
SpatPart p = g.getPart(prt);
double miny = vmin(p.y, true);
double maxy = vmax(p.y, true);
double minrow = rowFromY(miny);
double maxrow = rowFromY(maxy);
if (minrow > nrows || maxrow < 0) {
return(out);
}
size_t startrow = minrow < 0 ? 0 : minrow;
size_t endrow = maxrow >= nrows ? (nrows-1) : maxrow;
unsigned n = p.x.size();
out.reserve(5*(startrow-endrow+1));
std::vector<unsigned> nCol(n);
for (size_t row=0; row<nrows; row++) {
double y = ymax - (row+0.5) * ry;
// find nodes.
unsigned nodes = 0;
size_t j = n-1;
for (size_t i=0; i<n; i++) {
if (((p.y[i] < y) && (p.y[j] >= y)) || ((p.y[j] < y) && (p.y[i] >= y))) {
// nCol[nodes++]=(int) (((pX[i] - xmin + (y-pY[i])/(pY[j]-pY[i]) * (pX[j]-pX[i])) + 0.5 * rx ) / rx);
double nds = ((p.x[i] - xmin + (y-p.y[i])/(p.y[j]-p.y[i]) * (p.x[j]-p.x[i])) + 0.5 * rx ) / rx;
nds = nds < 0 ? 0 : nds;
nds = nds > ncols ? ncols : nds;
nCol[nodes] = (unsigned) nds;
nodes++;
}
j = i;
}
// now remove the holes?
std::sort(nCol.begin(), nCol.begin()+nodes);
unsigned rowcell = ncols * row;
// fill cells between node pairs.
for (size_t i=0; i < nodes; i+=2) {
if (nCol[i+1] > 0 && nCol[i] < ncols) { // surely should be >= 0?
for (size_t col = nCol[i]; col < nCol[i+1]; col++) {
out.push_back(col + rowcell);
}
}
}
}
}
return(out);
}
/*
idw
bool lonlat = could_be_lonlat();
//bool globalLonLat = is_global_lonlat();
//size_t n = x.size();
if (method == "idw") {
std::function<std::vector<double>(std::vector<double>&,std::vector<double>&,double,double)> distFun;
// std::vector<double> distance_plane(std::vector<double> &x1, std::vector<double> &y1, std::vector<double> &x2, std::vector<double> &y2);
if (lonlat) {
distFun = distance_lonlat_vd;
} else {
distFun = distance_plane_vd;
}
*/
/*
cxy = xyFromCell(cells);
d = distFun(cxy[0], cxy[1], x[i], y[i]);
v = extractCell(cells);
double a=0, b=0;
for (size_t j=0; j<4; j++) {
a += v[j] * d[j];
b += d[j];
}
out[i] = a / b;
*/
// <layer<values>>
std::vector<std::vector<double>> SpatRaster::extractXY(const std::vector<double> &x, const std::vector<double> &y, const std::string &method, const bool &cells, SpatOptions &opt) {
unsigned nl = nlyr();
unsigned np = x.size();
if (!hasValues()) {
std::vector<std::vector<double>> out(nl+cells, std::vector<double>(np, NAN));
return out;
}
std::vector<std::vector<double>> out;
if (method == "bilinear") {
bilinearValues(out, x, y, opt);
if (cells) {
std::vector<double> cell = cellFromXY(x, y);
out.push_back(cell);
}
} else {
std::vector<double> cell = cellFromXY(x, y);
out = extractCell(cell, opt);
if (cells) {
out.push_back(cell);
}
}
return out;
}
std::vector<double> SpatRaster::extractXYFlat(const std::vector<double> &x, const std::vector<double> &y, const std::string & method, const bool &cells, SpatOptions &opt) {
// <layer<values>>
std::vector<std::vector<double>> e = extractXY(x, y, method, cells, opt);
std::vector<double> out = e[0];
for (size_t i=1; i<e.size(); i++) {
out.insert(out.end(), e[i].begin(), e[i].end());
}
return out;
}
/*
template <typename T>
std::vector<T> flatten(const std::vector<std::vector<T>>& v) {
std::size_t total_size = 0;
for (const auto& sub : v)
total_size += sub.size();
std::vector<T> result;
result.reserve(total_size);
for (const auto& sub : v)
result.insert(result.end(), sub.begin(), sub.end());
return result;
}
*/
/*
std::vector<double> SpatRaster::extractXYFlat(const std::vector<double> &x, const std::vector<double> &y, const std::string & method, const bool &cells) {
unsigned nl = nlyr();
unsigned np = x.size();
if (!hasValues()) {
std::vector<double> out(nl * np, NAN);
return out;
}
std::vector<double> out;
if (method == "bilinear") {
std::vector<std::vector<double>> bil = bilinearValues(x, y);
if (cells) {
std::vector<double> cell = cellFromXY(x, y);
bil.push_back(cell);
}
out = flatten(bil);
} else {
std::vector<double> cell = cellFromXY(x, y);
if (cells) {
std::vector<std::vector<double>> xout;
xout = extractCell(cell);
xout.push_back(cell);
out = flatten(xout);
} else {
out = extractCellFlat(cell);
}
}
return out;
}
*/
// <geom<layer<values>>>
std::vector<std::vector<std::vector<double>>> SpatRaster::extractVector(SpatVector v, bool touches, bool small, std::string method, bool cells, bool xy, bool weights, bool exact, SpatOptions &opt) {
if (!source[0].srs.is_same(v.srs, true)) {
v = v.project(getSRS("wkt"), false);
addWarning("transforming vector data to the CRS of the raster");
}
std::string gtype = v.type();
if (gtype == "points") weights = false;
if (exact) weights = false;
unsigned nl = nlyr();
unsigned ng = v.size();
std::vector<std::vector<std::vector<double>>> out(ng, std::vector<std::vector<double>>(nl + cells + 2*xy + (weights || exact)));
if (!hasValues()) {
setError("raster has no values");
return out;
}
/*
#if GDAL_VERSION_MAJOR < 3
if (weights) {
setError("extract with weights not supported for your GDAL version");
return out;
}
#endif
*/
std::vector<std::vector<double>> srcout;
if (gtype == "points") {
if (method != "bilinear") method = "simple";
SpatDataFrame vd = v.getGeometryDF();
if (vd.nrow() == ng) { // single point geometry
std::vector<double> x = vd.getD(0);
std::vector<double> y = vd.getD(1);
srcout = extractXY(x, y, method, cells, opt);
for (size_t i=0; i<ng; i++) {
for (size_t j=0; j<nl; j++) {
out[i][j].push_back( srcout[j][i] );
}
if (cells) {
out[i][nl].push_back( srcout[nl][i] );
}
if (xy) {
out[i][nl+cells].push_back(x[i]);
out[i][nl+cells+1].push_back(y[i]);
}
}
} else { //multipoint
// Rcpp::Rcout << "multipoint" << std::endl;
for (size_t i=0; i<ng; i++) {
SpatVector vv = v.subset_rows(i);
SpatDataFrame vd = vv.getGeometryDF();
std::vector<double> x = vd.getD(0);
std::vector<double> y = vd.getD(1);
//srcout = extractXY(x, y, method, cells);
/*
for (size_t j=0; j<nl; j++) {
out[i][j] = srcout[j];
}
if (cells) {
out[i][nl] = srcout[nl];
}
if (xy) {
out[i][nl+cells] = x;
out[i][nl+cells+1] = y;
}
*/
}
}
} else {
SpatRaster r = geometry(1);
//std::vector<double> feats(1, 1) ;
for (size_t i=0; i<ng; i++) {
SpatGeom g = v.getGeom(i);
SpatVector p(g);
p.srs = v.srs;
std::vector<double> cell, wgt;
if (weights) {
if (gtype == "lines") {
rasterizeLinesLength(cell, wgt, p, opt);
} else {
rasterizeCellsWeights(cell, wgt, p, opt);
}
} else if (exact) {
if (gtype == "lines") {
rasterizeLinesLength(cell, wgt, p, opt);
} else {
rasterizeCellsExact(cell, wgt, p, opt);
}
} else {
cell = rasterizeCells(p, touches, small, opt);
}
srcout = extractCell(cell, opt);
for (size_t j=0; j<nl; j++) {
out[i][j] = srcout[j];
}
if (cells) {
out[i][nl] = cell;
}
if (xy) {
std::vector<std::vector<double>> crds = xyFromCell(cell);
out[i][nl+cells] = crds[0];
out[i][nl+cells+1] = crds[1];
}
if (weights || exact) {
out[i][nl + cells + 2*xy] = wgt;
}
}
}
return out;
}
/*
std::vector<double> SpatRaster::extractVectorFlat(SpatVector v, std::string fun, bool narm, bool touches, std::string method, bool cells, bool xy, bool weights, bool exact, SpatOptions &opt) {
std::vector<double> flat;
std::string gtype = v.type();
if (gtype == "points") {
weights = false;
exact = false;
}
if (exact) weights = false;
unsigned nl = nlyr();
unsigned ng = v.size();
if (!hasValues()) {
setError("raster has no values");
return flat;
}
std::vector<std::vector<std::vector<double>>> out;
if (gtype != "points") {
out.resize(ng, std::vector<std::vector<double>>(nl + cells + 2*xy + (weights||exact)));
}
std::vector<std::vector<double>> srcout;
if (gtype == "points") {
if (method != "bilinear") method = "simple";
SpatDataFrame vd = v.getGeometryDF();
//if (vd.nrow() == ng) { // single point geometry
std::vector<double> x = vd.getD(0);
std::vector<double> y = vd.getD(1);
std::vector<std::vector<double>> xycells;
if (xy) {
std::vector<double> cellxy = cellFromXY(x, y);
xycells = xyFromCell(cellxy);
}
if (!cells & !xy) {
return( extractXYFlat(x, y, method, cells));
} else {
srcout = extractXY(x, y, method, cells);
nl += cells;
flat.reserve(ng * nl);
for (size_t i=0; i<ng; i++) {
//flat.push_back( i+1 );//no id for points
for (size_t j=0; j<nl; j++) {
flat.push_back( srcout[j][i] );
}
if (xy) {
flat.push_back(xycells[0][i]);
flat.push_back(xycells[1][i]);
}
}
}
return flat;
*/
/*
} else { // multipoint
std::vector<double> x = vd.getD(0);
std::vector<double> y = vd.getD(1);
if (!cells & !xy & !weights) {
return( extractXYFlat(x, y, method, cells));
}
for (size_t i=0; i<ng; i++) {
SpatVector vv = v.subset_rows(i);
SpatDataFrame vd = vv.getGeometryDF();
std::vector<double> x = vd.getD(0);
std::vector<double> y = vd.getD(1);
srcout = extractXY(x, y, method, cells);
out.push_back(srcout);
if (cells) {
out[i][nl] = srcout[nl];
}
if (xy) {
out[i][nl+cells] = x;
out[i][nl+cells+1] = y;
}
}
}
*/
/* } else {
SpatRaster r = geometry(1);
//std::vector<double> feats(1, 1) ;
for (size_t i=0; i<ng; i++) {
SpatGeom g = v.getGeom(i);
SpatVector p(g);
p.srs = v.srs;
std::vector<double> cell, wgt;
if (weights) {