Hatching/patterning programs

[Mark Johnson]

GRASS's p.map system has the ability to assign 
colors to chosen values of a raster map and/or
assign user or builtin hatching patterns to
chosen values. For example:

setcolor 1 124
defpat diag
00001
0001
001
01
1
color 1 black
end
setpat 1 diag

This will set the color of category 1 to white
define a pattern called diag with black diagonal
lines and assign that pattern to category 1 of the
current raster map. More examples are in the 
g.manual entry for p.map  .
Enjoy 

Mark Johnson - USACERL