[gdal-dev] PNeo pan-sharpening post 3.7.0

[Ferdinand]

Hi Evan,

Thanks for the response, I'll give it a go.
As you are on the ticket I mentioned, I assume the rationale behind the
change was to remove the implicit assumption of overlap?
Was there also a subpixel shift then when doing it the "old" way?

Cheers,

Ferdi

On Fri, Jul 14, 2023 at 10:50 PM Even Rouault <even.rouault at spatialys.com>
wrote:

> 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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