[GRASS-user] Distance map with defined path

[Markus Neteler]

On Thu, Jul 9, 2009 at 3:29 PM, Margherita Di Leo<diregola at gmail.com> wrote:
> Hi List!
>
> I was wondering if there is a way to obtain a (raster) map of distances from
> a point or a line, in which the path is defined by a map (i.e. a flow
> direction).
> It would be very useful for me!


if I understand what you mean, r.cost should do it:
http://grass.osgeo.org/screenshots/raster.php
-> Example Distance to water (r.cost)

The r.cost manual page contains an example.

Markus