[gdal-dev] How to stop gdal_translate using overviews when resampling

[Even Rouault]

With GDAL 3.3, you could add -oo OVERVIEW_LEVEL=NONE. See 
https://gdal.org/api/raster_c_api.html?highlight=overview_level#_CPPv410GDALOpenExPKcjPPCKcPPCKcPPCKc

Le 28/05/2021 à 15:56, Jon Morris a écrit :
>
> Hello all,
>
> One of our users reported a difference in outputs after we upgraded 
> from GDAL 2.2 to 3.2. Our tool is using gdal_translate to resample a 
> raster from 5m to 10m and the outputs are very different.
>
> I'm ok with things changing between major versions, but when 
> investigating, I found that the outputs also change depending on 
> whether the input file has overviews. I was aware of the issue with 
> gdalwarp where overviews are used as a shortcut 
> (http://erouault.blogspot.com/2014/10/warping-overviews-and-warped-overviews.html 
> <http://erouault.blogspot.com/2014/10/warping-overviews-and-warped-overviews.html>), 
> but haven't been able to find anything similar in the docs or the code 
> when it comes to gdal_translate.
>
> Should overviews make a difference? Is there any way to disable this 
> behaviour, so the resampling is always done using the input raster and 
> not the overviews?
>
> Thanks,
>
> Jon
>
> *Jon Morris*
>
> *Software Developer*
>
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