[GRASS-user] Point attributes to a polygons

[Moritz Lennert]

On 25/06/09 10:58, xavier garcia acosta wrote:
> 
> 
> Hello everybody,
> 
> 
> I'm working with cadastre information and I've got the next problem. 
> I've the polygons that represent the plots of the houses but without any 
> attribute. I've also the points with the attributes of the previous 
> polygons. That I would like to do is to add the attributes of the points 
> to the polygons. Has anybody got any idea how to do it?

If the points are within the polygons, you can also try with v.distance 
from=points to=polygons [...] upload=to_attr to_column=cat to load the 
cat values of the polygons into the attribute table of the points. Then 
you can use v.db.connect to connect the attribute table of the points to 
that of the polygons via the polygon cat value. You might want to copy 
the table (db.copy) before connecting it, in order not to use the same 
attribute table with the points and polygon layer (if you erase one of 
the two layers, you will also erase the attribute table...).

Moritz