Re: Is it possible to ignore existing overview when performing decimated read?


Sean Gillies
 

Hi Even,

On Fri, Nov 13, 2020 at 10:38 AM Even Rouault <even.rouault@...> wrote:
On vendredi 13 novembre 2020 09:05:41 CET Sean Gillies via groups.io wrote:
> HI Loïc,
>
> I don't think we currently have any option other than to remove the
> overviews. In theory GDAL's OVERVIEW_LEVEL open option could help us, but
> the implementation isn't there. For example, if you used gdalwarp with
> `-ovr NONE` it will set an internal overview level to the value of -1. But
> that bypasses GDALOpenEx (used by rasterio). GDALOpenEx won't let us pass
> `OVERVIEW_LEVEL=-1. It fails with a "Cannot open overview level -1" error.

Was left as an exercice for a contributor:
https://github.com/OSGeo/gdal/pull/3181

Even

Thanks!

--
Sean Gillies

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