[GRASSLIST:601] Re: Understanding why r.flow gives me bad results.

[Antonio]

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* giovedì 03 luglio 2003, alle 11:42, David Finlayson scrive:
> Your DEM may have little pits (closed basins) that stop drainage. 
> Usually, these pits are artifacts of the DEM so you can use a program 
> like r.fill.dir to "fill" the pits and created a "filled" dem.

Yes, i realized that r.flow was rather nasty about pits. I read it in
the man page.

> 
> Use the "filled" dem in r.flow and see if the results are better. r.flow 
> is pretty picky about flat areas (see the notes in the manual).  You may 
> have better luck with r.watershed and r.terraflow for extracting the 
> river networks.

Yes, Markus has already told me about r.terraflow. I'll give it a try
but first I have to learn how to use CVS on my Debian box as I seem to
understand that r.terraflow is available only in the source tree.
(howcome it's not available in the weekly snapshots?)

Thanks for the "filled" option which I didn't consider. I'll give it a
try.

Bye
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