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

[Markus Metz]

achim wrote:
> I have many rivers flow into sinks. 
Sounds like r.terraflow output.
> So I have to define the points, where the river-network has its extreme
> points/where the points with highest accumulation-values are.
>   
In case of r.watershed, the stream segment output is more precise.
> I understand, that I need only one point for r.water.outlet:
> -> how do I find out the E and N of the starting-cell? Its a CELL and
> there are falling many coordinates within.
>   
Any set of coordinates falling within that cell should do.
BTW,  r.terraflow flow direction must be modified before it can be used 
with r.water.outlet.
> -> how do I give r.water.outlet a list of my desired "starting-cells"
> (their coordinates)
>   
You could call r.water.outlet repeatedly in a script.