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

hi,

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

point.

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

jachym

On Fri, Jan 20, 2006 at 09:14:21AM +0100, benducke@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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