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 <[email protected]
<mailto:[email protected]>> wrote:
Thanks!
On Tue, May 18, 2021 at 10:57 PM Even Rouault
<[email protected] <mailto:[email protected]>>
wrote:
Denis,
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.
Even
Le 18/05/2021 à 22:50, Denis Rykov a écrit :
Hi,
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).
Denis
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