[GRASS-user] Re: r.watershed - forgot to mask out no data?

[Daniel Victoria]

I just noticed that there are some small islands of the coast of South
America that are represented in the DEM that I though where not there.
Could that mess up the basin delineation over the continent? Would
that explain why the coastal basins shoot out to the ocean (Nodata
region in the DEM)?

Thanks
Daniel

On Jan 7, 2008 4:40 PM, Daniel Victoria <daniel.victoria at gmail.com> wrote:
>
> Hi,
>
> After a couple of days I got a successful output from r.watershed.
> Well, almost successful. Some basins looks very weird, as you can see
> in the attached file. Is it because I did not mask out the null cells
> on the dem map (white area on dem30.jpg)?
>
> Thanks
> Daniel
>