Thanks for super quick answer, On Tue, Jan 8, 2013 at 3:25 PM, Markus Metz <[email protected]>wrote:
> > Check if the friction map is not all zero or NULL for the second > polygon, the friction map within the ending polygon has everywhere value 1. > that the DEM covers the second polygon, it does. that the second > polygon was not used in any way as input for r.walk, sure. > that the second > polygon is actually reachable from the first polygon in the output of > r.walk, Not sure how to verify that, but i digitized a random point within the ending polygon (i placed it somewhere in the center) and i used it as starting point for r.drain, and obtained a nice least cost path line. and that the current region covers the second polygon. It does. > Also > have a look at the direction output of r.walk. > Looks OK (it has values) but i'm still not sure what should i check in it. Thanks, madi > > HTH, > > Markus M > > > > > Thanks in advance. > > > > Best, > > madi > > > > -- > > Margherita DI LEO > > Postdoctoral Researcher > > > > European Commission - DG JRC > > Institute for Environment and Sustainability (IES). Unit H03 – FRC > > Via Fermi, 2749 > > I-21027 Ispra (VA) - Italy - TP 261 > > > > Tel. +39 0332 78 3600 > > [email protected] > > > > Disclaimer: The views expressed are purely those of the writer and may > not > > in any circumstance be regarded as stating an official position of the > > European Commission. > -- Margherita DI LEO Postdoctoral Researcher European Commission - DG JRC Institute for Environment and Sustainability (IES). Unit H03 – FRC Via Fermi, 2749 I-21027 Ispra (VA) - Italy - TP 261 Tel. +39 0332 78 3600 [email protected] Disclaimer: The views expressed are purely those of the writer and may not in any circumstance be regarded as stating an official position of the European Commission.
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