[Qgis-user] watershed creation

[G. Allegri]

I usually use r.watershed directly from GRASS and I choose the output
I desire (basin, drainage, stream segments, etc.), and the command
looks something like:

r.watershed elevation=dem drainage=out_drain basin=out_basin

to get the raster of basins with unique values (basin) and the
drainage network (drainage).

Which QGIS version are you using? What OS? How big is your dem? What resolution?

giovanni


2009/2/16 ambrish dhaka <ambijat at hotmail.com>:
> Hello all,
> I found that the raster > hydrology..> watershed tool does not create the
> desired image.
> I used three things...1) the dem raster as source, 2) threshold value of
> 1000 and 3) output name as accu1.
> Is there anything else left?
> Why it is not producing, and how can I create basins?
> Regards,
> Ambrish Dhaka
>
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