[gdal-dev] PNeo pan-sharpening post 3.7.0

[Even Rouault]

Ferdinand,

you can for example use "gdal_edit.py -ro -a_ullr X1 Y1 X2 Y2 your.tif" 
to create a geotransform in a sidecar .aux.xml file.  If the pan and ms 
images have the same extent, you could possibly just use -a_ullr 0 0 1 
-1 (untested though). This hypothesis is not totally true as there's 
some subpixel shift for those products between the pan and ms bands if I 
remember well, so you might need to tune that a bit to get optimal 
results, but generally assuming same extent should give you already a 
decent result.

Even

Le 14/07/2023 à 17:36, Ferdinand a écrit :
> Hi all,
>
> We do stereo photogrammetry on Pleiades/PNeo images, and in one case 
> we run our algorithms on pansharpened images.
>
> Our workflow therefore was that we would pan-sharpen the images and 
> then run our stereo processing (using the panchromatic RPC model for 
> the pansharpened image).
>
> However, with the change in this PR: 
> https://github.com/OSGeo/gdal/pull/7373 which was integrated into 
> release 3.7.0, this is no longer possible. gdal_pansharpen.py now 
> gives: `RuntimeError: Panchromatic band has no associated geotransform`.
>
> What is the recommended workflow for this now? We can't orthorectify 
> the images first, as we need the raw row/column information in the 
> image in order for the photogrammetry processing to work.
>
> Is there some other way to add a geotransform that does not require 
> warping the image?
>
>
> Cheers,
>
> Ferdi
>
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