> On 29/05/2020 9:42, Uwe Fischer wrote:
>> Hello list,
>> thanks to Micha Silver and Helmut Kudrnovsky, the problem ist solved.
>> I did not set g.region prior to using v.what.rast. Seems to be a
>> typical non-Grass-Professional mistake. Now it works fine.
>> But to be honest, I do not really understand what it is good for. When
>> the raster image and the points to be updated share the same Grass
>> location and CRS, why do I have to set a region in addition?
> Glad you got it worked out.
> The only thing I would add to Stefan's explanation is a pointer to the
> GRASS wiki on region settings:
> https://grasswiki.osgeo.org/wiki/Computational_region >
Although I am a huge fan and promotor of the computational region
concept, I actually agree with Uwe that it is debatable whether in the
specific cas of v.what.rast this should be the default behavior. It is a
bit counter-intuitive. In any case, it should be clearly and explicitly
documented in the man page.
Uwe, would you mind posting an issue on this in github  ?