Gustaf wrote:
How do I color the polygons by the value of an attribute column
(say population)?
Micha wrote:
In the GUI it's the "Add various vector-based maps" (just to
the right of the "Add vector map" button) and choose "Thematic
layer".
In the dialog you can choose which attrib column and what
color ramp to apply.
The CLI command is 'd.vect.thematic'
in newer version of GRASS there is also the v.colors module,
which you can then use directly with 'd.vect -a rgb_column='.
See also the new 'population' standard color rule.
Hamish