geotiff
Demonstrates minimal geotiff support in plugin/tif
geotiff.cpp
#include <Draw/Draw.h>
#include <plugin/tif/tif.h>
#include <Geom/Geom.h>
using namespace Upp;
CONSOLE_APP_MAIN
{
TIFRaster tif;
FileIn in(GetDataFile("bogota.tif"));
if(!in || !tif.Open(in)) {
LOG("Failed to open tiff");
return;
}
int epsg = tif.GetMetaData("epsg");
LOG("EPSG code: " << epsg);
Value affine = tif.GetMetaData("geo_matrix");
if(affine.GetCount() != 6) {
LOG("Invalid transformation matrix");
return;
}
Matrixf transform;
transform.a.x = affine[0];
transform.x.x = affine[1];
transform.y.x = affine[2];
transform.a.y = affine[3];
transform.x.y = affine[4];
transform.y.y = affine[5];
if(fabs(Determinant(transform)) <= 1e-10) {
LOG("Invalid transformation matrix");
return;
}
Size isz = tif.GetSize();
Rectf r = Rectf(Pointf(0, 0) * transform, Pointf(isz.cx, isz.cy) * transform).Normalized();
LOG("Coordinates: " << r);
DUMP(tif.GetMetaData("BITSPERSAMPLE"));
DUMP(tif.GetMetaData("SAMPLESPERPIXEL"));
DUMP(tif.GetMetaData("PHOTOMETRIC"));
}
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