Yehiyam,
For that kind of issue my advise is to run in debugging mode. The GDAL
transformation engine must have an internal pixel geolocation defined.
It is probably CENTER of the pixel, as in AREA. I am not sure. In that
case the returning pixel/line refers to AREA and you might need to do
the adjustment. But again, I would debug it to make sure. We have
instructions on how to debug GDAL using VS and NetBeans on wiki. I just
can't find it. I can't find anything about the RPC_DEM either. Where did
you get it?
Regards,
Ivan
On 1/16/13 7:40 AM, Livneh Yehiyam wrote:
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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