[GRASS-user] Longest flow path

Hi all Can anyone suggest a way for me to determine the longest flow path in a catchment? I have several hundred to do, so I'd like a way to automate it if possible. Regards David ___ grass-user mailing list grass-user@lists.osgeo.org

Re: [GRASS-user] Overlapping vector areas

On Thu, Jul 29, 2010 at 8:28 PM, Micha Silver mi...@arava.co.il wrote: On 07/29/2010 06:38 PM, David Townshend wrote: Hi I am trying the generate watersheds for several outlets by looping over r.water.outlet in a python script (attached). The basin procedure is that for each outlet point

[GRASS-user] Overlapping vector areas

-*- # # # MODULE: r.water.outlet.points # AUTHOR(S): David Townshend # PURPOSE: Runs r.water.outlet for a list of points # COPYRIGHT: (C) 2004,2008,2009 by the GRASS Development Team # # This program is free software under the GNU General Public

Re: [GRASS-user] Some questions about DEMs

In the end I combined the contours and points and used r.fillnulls to generate a 5m DEM. It seemed to run quite a bit faster than r.surf.contours and gave fairly good results. Not perfect, but given the data I'm starting with, its not bad either. My next problem is getting r.sim.water working.

[GRASS-user] Some questions about DEMs

Hi I have a couple of questions about DEMs, and how they work in GRASS. My application is hydrological and hydraulic analysis, and at the moment I'm investigating using r.sim.water to generate floodlines. Usually, for this sort of analysis, I would have 5m contours for the catchment and a

Re: [GRASS-user] Some questions about DEMs

On Fri, Jul 9, 2010 at 12:50 PM, Hamish hamis...@yahoo.com wrote: David wrote: I have a couple of questions about DEMs, and how they work in GRASS. My application is hydrological and hydraulic analysis, and at the moment I'm investigating using r.sim.water to generate floodlines.