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I need a C++ API to convert x,y Image Coordinates in their native projection to output image pixel,line coordnates. I see the gdallocationinfo documentation, but no API for it.

Where in online GDAL doc I look ...or do I have to write my own?

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I think I answered your question at gis.stackexchange.com/questions/30985/… – jorgeas80 Aug 11 '12 at 1:03

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