There are no modules for that in GRASS. r.terraflow uses a
MFD
algorithm, but doesn't have any option for weighted flow
accumulation.
I've requested the feature:
http://
intevation.de/rt/webrt?serial_num=4863
If I remember correctly, ArcObject has a function called
FlowDirection
or something (I forgot its name). Maybe, it's implemented
in the raster
calculator.
Huidae Cho
On Tue, Aug 01, 2006 at 10:48:54AM -0700, Jonathan Greenberg
wrote:
> So I'm in a bit of a quandary here -- I want to use a
MFD flow algorithm,
> but I want it used on a surface of precipitation (so
the accumulation isn't
> calculating "number of pixels", rather a
"real" value). r.watershed allows
> me to assign a surface value, but isn't MFD. Is
anyone aware of any
> algorithms that do both (use MFD and per-pixel values),
either in GRASS or
> Arc (or in some other package?) Thanks!
>
> --j
>
> --
>
> Jonathan A. Greenberg, PhD
> NASA Postdoctoral Researcher
> NASA Ames Research Center
> MS 242-4
> Moffett Field, CA 94035-1000
> Phone: 415-794-5043
> AIM: jgrn3007
> MSN: jgrn3007 hotmail.com
>
>
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