[gdal-dev] RPC transform

Livneh Yehiyam yehil at rafael.co.il
Wed Jan 16 04:40:26 PST 2013


Hi
I have a question about the RPC transform implemented in gdal_rpc.cpp.
If a dem file is specified in the transform options (RPC_DEM) the file is sampled to retrieve the elevation of the transformed point.
In the case where the dem file is a DTED file (which defines AREA_OR_POINT to POINT), shouldn't the pixel/line values in the dem file be offset by half a pixel to get the correct height?

Thanks
Yehiyam


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