Thanks for your answer Frank. I've stepped through the code (GDALWarpOperation and GDALWarpKernel) but can't find the origin of the mistake... So I've made a small package : http://bosow.free.fr/bundle.rar There might be small mistakes since I replaced my QStrings with char* so that you can compile it easier, but I didn't try to compile it, but it should be ok... Let me know if you have any problems so that you don't waste too much time.
Thanks again, I appreciate your help since I'm really stuck right now... Sincerely yours, -- Matthieu Castanier ======================================== Message du : 19/11/2010 De : "Frank Warmerdam " <[email protected]> A : [email protected] Copie à : Sujet : Re: [gdal-dev] GDALWarpOperation::WarpRegionToBuffer() doesn't write in my buffer [email protected] wrote: > Hi, > I am trying to write a program which is supposed to read geotif files, > extract the values I need, then export them in a homemade format. > As my geotif files are on several different UTM zones, I have to change > projections so that all the files I open have the same projection as the > "main tile" (central tile). > > So i'm using WarpRegionToBuffer from GDALWarpOperation class with a null > hDstDS, which is supposed to work... but my buffer remains filed with > the default values I assigned to him (-999), even though > WarpRegionToBuffer returns CE_None... ... Matthiew, I don't see an obvious problem. If you can't make progress, perhaps by stepping through the code, then bundle up a minimal C++ program and input file demonstrating the problem. Something I can easily compile here and run with a minimum of fuss. Best regards, -- ---------------------------------------+-------------------------------------- I set the clouds in motion - turn up Frank Warmerdam, [email protected] light and sound - activate the windows http://pobox.com/~warmerdam and watch the world go round - Rush Geospatial Programmer for Rent
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