[gdal-dev] gdalwarp not using DEM with RPC

[Goo Creations]

Hi all

I have a image with the necessary DEM and RPB file. When I use:

gdalwarp -to "RPC_DEM=/tmp/dem.dem" -to "METHOD=RPC" raw.tif ortho.tif

OR

gdalwarp -to "RPC_DEM=/tmp/dem.dem" -rpc raw.tif ortho.tif

But when I warp the image, I see no difference between ortho.tif that was
generated with the RPC_DEM option and the one generated without it.
The region has bunch of mountains, so you definitely should see major
changes when using a DEM file.

Am I warping the image correctly, or is there something else that goes wrong
here?

Christoph
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