[GRASS5] shortest path with r.drain?

Jachym Cepicky jachym.cepicky at centrum.cz
Sat Jan 21 12:44:38 EST 2006

on the costsurface, you are always seeking the best path to lowest

what about to create friction surface and to search for the path on it?


On Fri, Jan 20, 2006 at 09:14:21AM +0100, benducke at compuserve.de wrote:
> How do I calculate the shortest path
> _between two given points_
> on a cost surface using r.drain?
> The manual says to use the 'vector_points=start,stop'
> Parameters, but when I do so,
> all I get is flowlines down to the lowest
> point from each of the points in both maps
> , not a least cost path _between_ them.
> Am I doing/thinking something wrong here?
> Best,
> Benjamin
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Jachym Cepicky
e-mail: jachym.cepicky at centrum.cz
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Department of Geoinformation Technologies
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613 00 Brno
e-mail: xcepicky at node.mendelu.cz
URL:    http://mapserver.mendelu.cz
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