[GRASS-user] Help on Define a color table

GRASS GRASS user
1

Greetings
I haver searched among color tables and I didn’t find any example like this:
I want to define a color table where:
all negative values are blue
all zeros are green
all positive values are red.

Can anyone give me a tip on this?
Thanks

2

You could use r.mapcalc and make all negs = -1, all pos = 1, leave all 0 = 0. Then make a color table where -1 is blue, 0 is green and 1 is red. I'm doing the very same thing right now :slight_smile:

[Sent from a mobile device]

On Apr 26, 2011, at 11:16 PM, Franz Schiller <franzschiller1975@gmail.com> wrote:

Greetings
I haver searched among color tables and I didn't find any example like this:
I want to define a color table where:
all negative values are blue
all zeros are green
all positive values are red.

Can anyone give me a tip on this?
Thanks
_______________________________________________
grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user

3

Greetings
I haver searched among color tables and I didn’t find any example like this:
I want to define a color table where:
all negative values are blue
all zeros are green
all positive values are red.

Something like this in a rules file will work:

-99999 0:0:255
-1 0:0:255
0 0:255:0
default 255:0:0

··· 
-- 
Micha Silver
Arava Development Co. +972-52-3665918
[http://www.surfaces.co.il](http://www.surfaces.co.il)