[GRASS-user] v.patch: Correct Syntax?

[Hamish]

Rich wrote:
>  I'll try again, both creating the new region as a line rather
> than an area and explicitly setting the operator=and.

In this case the box created by v.in.region should be an area.


Here is an example using the Spearfish sample dataset:


#set to the default region
g.region -dp

# shrink the region in by 6km on all sides
g.region w=w+6000 e=e-6000 n=n-6000 s=s+6000 -p

#make an area box covering the current region
v.in.region zoom_box

# preform the overlay operation
v.overlay ain=soils bin=zoom_box op=and out=soils_zoom_box



Only thing I'd add to that is to make sure that your vector areas have
category numbers.


Hamish