[gdal-dev] reproject points using raster info
Yann Chemin
yann.chemin at gmail.com
Sat Jan 10 02:16:18 EST 2009
Hello,
(C API)
The aim is to get a (lat,long) pair
into (projX,projY) pair from hDataset1 projection info.
Lat/long projection was defined with:
char *pszProj4 = "+proj=ll +ellps=wgs84 +datum=wgs84";
OGRSpatialReferenceH hSRS;
OSRImportFromProj4(hSRS, pszProj4);
printf( "%s\n", pszProj4 );
Using GDALGetProjectionRef( hDataset1 ),
the raster projection info is extracted.
Here somehow the extracted projection information
should be imported into a second OGRSpatialReferenceH,
called hSRS1 for example. But I don't know how to do that.
I am confused by the C++ examples actually,
and have difficulties to find a proper C example somewhere to do that.
thanks for any help/suggestion,
Yann
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