Le lundi 10 juin 2013 18:13:47, Baker, Anthony W a écrit : > I have a NITF file which I can read fine with GDAL. The issue that it is a > chip and using the transformation to determine geolocations fails (for > example finding the chip's four corners). Instead of placing a point > based on the chip, it places it based on the whole image. I can read the > metadata and see that the RPC metadata contains the chip offset: RPC > Metadata: > LINE_OFF=3276 > LINE_SCALE=3276 > SAMP_OFF=2538 > SAMP_SCALE=2538 > LONG_OFF=-106.8927 > LONG_SCALE=0.0542 > LAT_OFF=32.3084 > LAT_SCALE=0.0593 > HEIGHT_OFF=1229 > HEIGHT_SCALE=1214 > > I am tempted to use the LINE_OFF and SAMP_OFF to make the adjustments to > properly get the boundary. I believe this is only a partial solution (not > generic enough) and will just give further problems as I get other NITF > chips. Would someone help me with the proper way of handling the chip > transformation?
Anthony, I'm not sure from your above text how you tried to make use of the RPC metadata. Did you try "gdalwarp -rpc the.nitf out.tif" ? Best regards, Even > > Thank you, > > Anthony -- Geospatial professional services http://even.rouault.free.fr/services.html _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
