[GRASS-user] Watershed delineation

[Daniel Victoria]

Hi all,

I trying to delineate watersheds for several points in a very big DEM

 |   Data Type:    CELL                              |
 |   Rows:         4803                               |
 |   Columns:      5172                             |
 |   Total Cells:  24841116

I've successfully ran r.terraflow on the DEM but now I'm stuck. How do
I get the watershed area for my points of interest? I've tried using
the direction map produced with r.water.outlet but it did not work (I
used MFD flow calculation).

Also, from what I understood, the sink watershed map is suposed to be
the watersheds delineated by the terraflow module, is that correct? It
turns out that I have 191736 categories. Does that mean 191736 basins?
Is there a way to aggregate them?

Anyway, I think I'll let r.watershed run for the night


Thanks and cheers
Daniel