[GRASSLIST:5219] Re: v.what.rast question

[Chris Fonnesbeck]

Any idea, then, what the appropriate function for moving attributes
from one vector attribute to another is? v.overlay does not seem to
work for this either.

Thanks in advance,
Chris


On Wed, 22 Dec 2004 08:57:12 +0100 (CET), blazek at itc.it <blazek at itc.it> wrote:
> > I am trying to transfer a stream characteristic (gradient) from a line
> > vector coverage to a set of riparian polygons (an area vector
> > coverage). I figured the easiest way to to this (since I am only
> > interested in one column) was to convert the line coverage to a raster
> > coverage with using the gradient column as the attribute, then to use
> > v.what.rast to insert the corresponding values into the riparian
> > polygons' attribute table. However, when I use v.what rast, I get no
> > values uploaded to the table. Here were my commands:
> >
> >  v.to.rast in=streams out=stream_grad col=gradient
> >  v.what.rast vect=riparian rast=stream_grad col="GRADIENT"
> >
> > Am I going about this incorrectly? If not, why doesnt this work?
> >
> > Thanks,
> > Chris
> 
> v.what.rast works only with points.
> 
> Radim
> 
>