[GRASS-dev] export vector file as multi-polygon from attribute column value

[Moritz Lennert]

On 24/11/16 10:31, Yann Chemin wrote:
> Hi,
>
> I have a vector with polygons having same attribute value and would like
> export it as multi-polygon according to that attribute column.
>
> v.out.ogr export -m but does not seem to actually do that.
>
> any idea?

Wild guess: aren't multipolygons defined based on common category value 
? If yes, try v.reclass with your column as input and then v.out.ogr.

Moritz