[GRASSLIST:2441] Applying ranges of color to a raster map

[Jason Horn]

How can I apply ranges of color to a raster map?

I want to specify ranges of color, like the pre-defined ones that 
r.colors uses (such as byr)  Applying byr to a map gives a gradient of 
blue through yellow to red.  But I want to specify where the break 
points occur.  I can't use percentages in a user defined file because 
then r.colors decides based on the total RANGE of colors.  I have a set 
of maps (RADAR) where the total range of values varies from image to 
image, but each value must be colored the same way across maps (so they 
look right in a sequence animation).  I can't edit the color file 
manually, because I am trying to automate the processing of thousands 
of files.

Any ideas? Thanks in advance!

Jason


Jason Horn
Boston University Department of Biology
5 Cumington Street  Boston, MA 02891

jhorn at bu.edu
617 353 6975