No sure if I understood what you asked but here we go. First I'd rescale (r.rescale) the aspect to the desired directions. Take a look at the r.slope.aspect man page [1] to see what the aspect values represent Then I'd rescale the directions map to the weights you mention.
Hope it helps Daniel [1] - http://grass.osgeo.org/gdp/html_grass64/r.slope.aspect.html On Wed, Feb 8, 2012 at 7:10 PM, leonidas <leonidas_lia...@yahoo.gr> wrote: > I need to rescale an aspect map in a scale 0-255 where North = 0 and SE=255. > Finally I need to assign weights as follow: > 0.02 N > 0.02 NE > 0.12 E > 0.34 SE > 0.20 S > 0.18 SW > 0.08 W > 0.03 NW > > Thank you! > > > -- > View this message in context: > http://osgeo-org.1560.n6.nabble.com/How-to-rescale-an-aspect-map-tp4377272p4377272.html > Sent from the Grass - Users mailing list archive at Nabble.com. > _______________________________________________ > grass-user mailing list > grass-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/grass-user _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user