Luisa Peña wrote: > I'have 3 layers of Landsat (Green, Red and Near-Infrared) and I'm trying to > produce a false-color composite (r.composite( with those but... I'm getting > very frustrated because I'm producing very bad look composites. My layers > are reflectances from 0-1.8 or something. Shall I rescale them to 0-255?
r.composite uses the colour table associated with each map to convert the map's value to an intensity. If 1.8 represents "full intensity", then use e.g.: r.colors mapname rules=- <<EOF 0.0 black 1.8 white EOF If you want a non-linear relationship, you can either contruct a colour table using a piecewise-linear approximation, or apply the transformation to the data with r.mapcalc. -- Glynn Clements <gl...@gclements.plus.com> _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user