[GRASS-user] movement direction surface in r.drain

[Markus Neteler]

On Fri, Dec 28, 2012 at 4:37 PM, Markus Metz
<markus.metz.giswork at gmail.com> wrote:
> On Wed, Dec 19, 2012 at 3:25 PM, Margherita Di Leo <diregola at gmail.com> wrote:
>> Hi All,
>>
>> I have a friction map, a start polygon and an end polygon and would like to
>> find the least cost path, meaning not a corridor but a thin line.
...
> The result should be a line connecting the two polygons

... now a FAQ:
http://grasswiki.osgeo.org/wiki/Cost_surfaces

Would be nice to see it expanded with a real example (NC data set) with
a map...

markusN