On Sat, 14 Nov 2009, Milton Cezar Ribeiro wrote:
I have a DEM, a drainage and a Cover mapa, and I need to estimate - for ANY pixel of my drainage - what is the amount of my cover classes that "contribute" (or are upstream) of that pixel.
milton, Not all my data are imported and defined to the critical area so I cannot offer direct experience. However, Single Flow Direction (SFD, D8) moves flow into a single downslope cell and is used by r.watershed and r.terraflow. D-infinity, or vector grid approach, is used by r.flow. Multiple Flow Directions (MFD, what you probably want to use) partitions the flow into two or more downslope directions and is used by r.terraflow, r.topmodel, and r.mapcalc flow implementation in the r.mapcalc tutorial. Also check out r.hydro.CASC2D. HTH, Rich _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
