[GRASS-user] intersection of network-lines and areas

[Markus Metz]

achim wrote:
> Hello,
>
> I cannot find a solution for extracting those areas that are crossed by
> a line. And further to find out, what areas are crossed by a network of
> lines in order to union them into one area.
>
> Its for combining subbasins which are part of a certain rivernetwork.
>   
What about r.water.outlet? You can get the exact coordinates for the the 
outlet point from the existing river network. Best would be to use the 
stream segments output of r.watershed as river network. That should give 
you the one area you are looking for.