[GRASS-user] bounding box grid and polygon layer

[Moritz Lennert]

On 28/01/09 11:27, Matthew Mulbrandon wrote:
> 
> Hello,
> 
> I want to give census tracts categories values ( layer tenn_county_all) 
> based on there centroids location in a grid layer that I have made 
> (tenn_county_grid). The grid is nubered 1-42 and also as letters i.e. 
> row A colunm G.
>  I was planning to do something like
> 
> if centroid of tract X in grid box 12 write out category 12 for that 
> tract X. 
> 
> I don't want to do this by hand but I am not sure how or if I can query 
> between two layers.
> 
> I am not attached to any particular method just need something that will 
> do the job.
> 
> I looked up info on the web and found bounding box in v.edit so I think 
> that is a way to go but have not seen anything on how to do this.

If your grid is vector, than v.distance should do the job.

Moritz