> I guess it may be a fill (``null'') value of the source data set. Try to eliminate it with, e. g.: > > $ r.null map=BAND setnull=-28672 > > and check the range afterwards. You may eliminate HEG's own fill value as well with $ ... setnull=0. > > > to approx. 9000 .
Thanks much! This solved the bulk of my headaches. > > Any suggestions on what to try next? > > In the ``Tutorial on Producing MODIS True Color Images'' [1], authors suggest a table to be used for translating MODIS reflectances into RGB values. You may apply this table to each of the bands (via $ r.colors ... color=rules) prior to using `r.composite'. IIRC, the result was about of the same quality as the example in the tutorual when I've last tried that. > I'll have to play around with that. > PS. May be a wiki [2] page for MODIS-related issues? I guess this will be a project to take a stab at it during the university holiday furlough... Best and Thanks, Mark Hall _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
