Hamish: > > I notice that the range of the DCELL map is greater than the range > > of its color map, so max values will be shown as the null value > > color (nv white). Something cast to int when it should use ceil(max) > > and floor(min)? How does that work if the data range is 0.0-1.0?
Dylan: > Thanks for the follow-up Hamish. I am rather mystified by this problem > myself as the rules file in '/usr/local/grass-xxx/etc/color/ryg' > looks fine. The dataset that caused this mess ranges from 0.1 - 0.6. > Other other color ramps appear to work fine. The resultant colr file > had something like > > 0% > 0:127:0 0:127:0 > > in it.. I can check again if that looks like it might mean something. and that's the full file! ah, FP range from 0.1 - 0.6 may be a clue. I can reproduce this now, G63> r.mapcalc test="rand(0.1,0.6)" G63> d.rast test # looks ok, no colr file so default rainbow colors noise G63> r.colors test col=rainbow G63> d.redraw # blank! G63> cat colr/test % 0 0 0:255:0:127 0:255:0:127 range is 0->0, so all color is outside of data. The default null color rule is "nv white". color=byr should look like: % 0.100000000000019545476348525881 0.599997845421177067315454678464 0.100000000000019545476348525881:0:0:255 0.3499989227:255:255:0 0.3499989227:255:255:0 0.599997845421177067315454678464:255:0:0 So FP maps are being treated as CELL maps? Setting with r.colors -i rules works ok: the bug is only in 6.3-cvs, 6.2.x is ok. Hamish _______________________________________________ grass-dev mailing list [email protected] http://grass.itc.it/mailman/listinfo/grass-dev
