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

[Jon Morris]

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), 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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