[gdal-dev] RPC to geotransform converting
even.rouault at spatialys.com
Wed May 19 03:48:48 PDT 2021
You mean the HEIGHT_OFFSET parameter in the RPC ? Yes, that can
generally be used as a first-order correction if you don't use a DEM.
I'm not sure using it vs not-using it has been a deliberate choice. One
could say that with the current behavior people know that something is
wrong and must thus set something additional. There was a related
discussion in https://github.com/qgis/QGIS/pull/36385. A non breaking
change would be to make -to RPC_HEIGHT=HEIGHT_OFFSET work
Le 19/05/2021 à 11:54, Denis Rykov a écrit :
> Finally I solved the issue by adding "-to RPC_HEIGHT=XXX" to gdalwarp.
> It seems gdalwarp doesn't take this parameter into account even if it
> is presented in the RPC *.txt file.
> Should I file the ticket or was it done by purpose?
> On Tue, May 18, 2021 at 11:26 PM Denis Rykov <rykovd at gmail.com
> <mailto:rykovd at gmail.com>> wrote:
> On Tue, May 18, 2021 at 10:57 PM Even Rouault
> <even.rouault at spatialys.com <mailto:even.rouault at spatialys.com>>
> if the view angle is off-nadir, you generally need to use the
> -to RPC_DEM= option with a DEM covering the area of interest
> (and make sure the values it contains are WGS 84 ellipsoidal
> elevations) to get accurate results.
> Le 18/05/2021 à 22:50, Denis Rykov a écrit :
>> I have a GeoTIF file and file with RPC information next to it
>> (*.txt). Is there a way to transform this raster to a normal
>> geotiff without displacement (with geotransform inside) or is
>> it fundamentally impossible?
>> I've tried to achieve it with gdalwarp but in this case the
>> result of the transformation has about 5 meters (10 pixels)
>> x-displacement (I use QGIS to visualize it).
>> gdal-dev mailing list
>> gdal-dev at lists.osgeo.org <mailto:gdal-dev at lists.osgeo.org>
>> https://lists.osgeo.org/mailman/listinfo/gdal-dev <https://lists.osgeo.org/mailman/listinfo/gdal-dev>
> http://www.spatialys.com <http://www.spatialys.com>
> My software is free, but my time generally not.
My software is free, but my time generally not.
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