The error you get can usually be avoided when you set the output bounds correctly. Are you sure the -te options you use are correct?
ERROR 1: Too many points (441 out of 441) failed to transform, unable to compute output bounds On Mon, Apr 9, 2012 at 1:57 PM, Claire Porter <claire.por...@gmail.com> wrote: > Etienne, > > When I set the extents using -te, I get an output of size 0. I think > the problem is not in the warping itself, but in the transformation > using the RPCs. > > Thanks, > Claire > > > On Mon, Apr 9, 2012 at 10:04 AM, Etienne Tourigny > <etourigny....@gmail.com> wrote: >> Claire, >> >> You may have to set the output extents manually with the -te option. >> >> This has been the solution to many problems with gdalwarp. >> >> Etienne >> >> >> On Mon, Apr 9, 2012 at 11:12 AM, Claire Porter <claire.por...@gmail.com> >> wrote: >>> Dmitry (and the list), >>> >>> Using the warp options you suggested does not make a difference. Even >>> SAMPLE_GRID does not significantly change the output. I also tried using >>> wgs84 as the output coordinate system in case it was an issue of being >>> projected into Polar Stereographic: no luck. >>> >>> I copied the relevant functions from gdal_rpc.cpp into python order to test >>> the RPC calculations independant of the warping functions and any projection >>> system. I used a sampling grid over the whole extent of whatever test image >>> and found that the RPCs do not converge for any part of the error-prone >>> images In fact, with each iteration the offset from the original pixel gets >>> further and further from zero (alternating sign each iteration). >>> >>> From these tests, I am guessing that the issue is not the sampling or the >>> projection system. Since other software packages can handle these images, I >>> assume then that the issue is in how gdal is managing the RPCs. Any ideas? >>> >>> Many thanks, >>> Claire >>> >>> _______________________________________________ >>> gdal-dev mailing list >>> gdal-dev@lists.osgeo.org >>> http://lists.osgeo.org/mailman/listinfo/gdal-dev _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
