[GRASS-user] Question on memory allocation and use

[Moritz Lennert]

On 23/09/16 20:51, Rich Shepard wrote:
> On Fri, 23 Sep 2016, Markus Metz wrote:
>
>> Apparently there are less than 52 MB of free memory left. The resulting
>> vector contours must be quite large. Try to export GRASS_VECTOR_LOWMEM=1
>> before running r.contour.
>>
>> Maybe also use a larger step or less levels.
>
>   Took a different approach by reducing the size of the source DEMs (which
> cover a very large area compared to the area of interest).
>
>   Using v.to.rast I converted the project boundary vector to a raster file,
> then made it into a mask with r.mask. The mask then limited the area of the
> source DEMs with g.copy.

FYI: In grass7, r.mask has a 'vector' parameter which allows you create 
a mask directly from a vector map.

And AFAIK, no need to g.copy. Just run your analysis with the mask set 
(and the region also correctly set to only the area of interest).

Moritz