[gdal-dev] a_scale per band

[Even Rouault]

Le 23/03/2026 à 17:53, Javier Jimenez Shaw via gdal-dev a écrit :
>
> Hi
>
> related to https://lists.osgeo.org/pipermail/proj/2026-March/012063.html
> I was trying to change the type to int16 and scale (and offset) it to 
> make it smaller, similar to the NSRS geoid model that Even suggested 
> me to do in 
> https://github.com/jjimenezshaw/NSRS-2022-PROJ/blob/master/make_geoid2022.sh
>
> But in de_lgl_bw_BWTA2017.tif there are 4 bands, and I need different 
> a scale and offset for each.
> I don't see how to use a_scale and a_offset per band (documentation 
> mentions "-a_scale Set band scaling value ..."). How can I do it?
Translate to VRT and edit the VRT
>
> Bonus track: I don't see in the new gdal CLI how to set a_scale and 
> a_offset.
Can you file an enhancement ticket for gdal raster edit to add that ?
>
> Thanks
> Javier.
>
>
>
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