On 11/06/07 19:34, Maciej Sieczka wrote:
Hazael Maldonado Torres wrote:
Hi there,
I am new in the GRASS world and the reason I am using it is because I
need to obtain the adjacent areas for a given area in the map. So far,
I have found a way to obtain this information. I found that
v.neighbors with the option "count" tells you how many neighbours,
however, I need to know which ones so I can do some other analyses.
I hope someone out there can help me.
v.to.db option=sides
If I understand correctly this only works for boundaries, not for
areas/centroids.
So (again IIUC), to get a list of neighbors of an area you would have to:
- attribute a category value to each boundary
- use v.to.db option=sides to get the areas adjacent to each boundary
- for each area:
- search the boundaries to which this area is adjacent
- search the other areas adjacent to these boundaries
Might be worth looking into how difficult it would be to apply the
'sides' option to centroids and find adjacent centroids...
Moritz
_______________________________________________
grassuser mailing list
[email protected]
http://grass.itc.it/mailman/listinfo/grassuser
