[GRASS-user] Categorize vector map and print with color gradient

[Moritz Lennert]

On 23/01/12 15:18, Steffen John wrote:
> Hi List!
> I'm facing some problems while printing a vector map. I have a map with
> a polygon grid with a number in one column (this is a count of points
> which lies within each grid cell).
> I would like to print this vector map with a colour gradient e.g. from
> white to blue. The categorisation should be done automatically with a
> specific mode (e.g. natural breaks, quantiles) and the number of classes
> has to be customisable.
>
> Is there is possibility/function which does this with a vector layer as
> input?
>
> I have found a workaround with raster maps, but even there was no
> possibility for an automatic classification (at least I didn't find).

Try d.vect.thematic, possibly after having run v.class for finding class 
breaks if you don't like the ones proposed by d.vect.thematic.

Moritz