[GRASS-user] r.watershed MFD strange basin

[ivan marchesini]

Dear Markus,
thank you for your answer.

> Please report if the stream segments are as expected, because the
> determination of half-basins and basins is based on the stream
> segments.

this is the map of streams:
http://imageshack.us/photo/my-images/232/streams.png/

it seems fine..


> If the stream segments seem out of place, something is wrong with the
> identification of stream segments and you will need to look at flow
> accumulation and check if that makes sense.

this is the accumulation map:
http://imageshack.us/photo/my-images/37/accumulation.png/

the same as above...


> If the stream segments seem to be ok, something is wrong with
> determining the left and right side of a stream.

this is the map of basins:
http://imageshack.us/photo/my-images/11/basins.png/

these are the half_basins:
http://imageshack.us/photo/my-images/4/halfbasins.png/


As you can see the problem arises for the half_basins and not only in
one place. There are a lot of problems all around.

I cannot explain which is the reason of this behaviour..

if you like I can send you the DEM....


ciao

Ivan











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Ivan Marchesini
Perugia (Italy)
Socio fondatore GFOSS "Geospatial Free and Open Source Software" http://www.gfoss.it
e-mail: ivan.marchesini at irpi.cnr.it
        ivan.marchesini at gmail.com
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