[GRASS-dev] [GRASS-user] want to color vector map. What am I doing wrong?

Anna Petrášová kratochanna at gmail.com
Tue Dec 3 13:25:38 PST 2013

Hi Michael,

On Tue, Dec 3, 2013 at 4:12 PM, Michael Barton <Michael.Barton at asu.edu>wrote:

>  I want to color a vector map. I’m just trying it with some test maps from
> the North Carolina demo set. I used the ‘manage color rules interactively’
> dialog in the GUI and am using a version of GRASS 7 compiled on 1 November.

I think it's currently somehow broken due to some other changes in GUI
which were not reflected in this dialog. I will try to fix it, probably in
the next weeks. I will actually need this functionality, too.

>  Is there no way to use a character column for colors?

I think it requires numbers but I am not sure if it is the problem of GUI
or underlying module (the latter I guess).


> Even when I use a numeric column (e.g., the column “pumpers” in the
> firestations vector points map), the OK, apply, and preview buttons remain
> greyed out after I have filled out the table with values and colors. I’ve
> tried each of the integer values in the column and using the min and max
> values only. Yes, each of the table lines is checked.
> I thought that maybe this only works for area maps. But I have the same
> problems with them. (I tried the geology map).
> Clicking the “add column” button does nothing AFAICT
>  I also tried the v.colors approach. I was able to do everything (no
> greyed out buttons). But no colors either.
>  So what am I doing wrong? Making colored thematic maps is a pretty basic
> and important function. I didn’t try the thematic map layer because I
> wanted to do points too and it only does areas.
>  Michael
>            ______________________________
>  C. Michael Barton
>  Director, Center for Social Dynamics & Complexity
>  Professor of Anthropology, School of Human Evolution & Social Change
>  Arizona State University
>  Tempe, AZ  85287-2402
>  USA
>  voice:  480-965-6262 (SHESC), 480-965-8130/727-9746 (CSDC)
>  fax:          480-965-7671(SHESC), 480-727-0709 (CSDC)
>  www:  http://csdc.asu.edu, http://shesc.asu.edu
>  http://www.public.asu.edu/~cmbarton
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