Hi Margherita, On Wed, Jul 15, 2009 at 8:03 AM, Margherita Di Leo<diregola at gmail.com> wrote: > Hi Markus, > > Thanks for the hint! I'm trying with r.cost (but it is veeeeery slow!) since yesterday night (European time) r.terracost (GRASS Addons) seem to produce reasonable results. Please consider to try as well! ciao Markus