[GRASS-user] v.select question

GRASS GRASS user
1

Dear Grass'ers

I have a question regarding v.select. My data consists of vector polygons and sample plots randomly positioned both inside and outside the vector polygons. I would like to select only those sample plots that are within the vector polygons, unfortunately v.select selects those sample plots within the polygons and those which overlap or come into contact with polygon boundary. I would like to select sample plots that are within the polygon and do not touch / overlap with the boundary.

I am using version 6.2.3 and the only option I have in v.select is overlap.

Is there another tool I could use to clip / refine my sample plot selection?

Many thanks,
Wesley

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2

Wesley wrote:

I have a question regarding v.select. My data consists of
vector polygons and sample plots randomly positioned both
inside and outside the vector polygons. I would like to
select only those sample plots that are within the vector
polygons, unfortunately v.select selects those sample plots
within the polygons and those which overlap or come into
contact with polygon boundary. I would like to select sample
plots that are within the polygon and do not touch / overlap
with the boundary.

I am using version 6.2.3 and the only option I have in
v.select is overlap.

Is there another tool I could use to clip / refine my
sample plot selection?

v.overlay is much more powerful, perhaps it can help.
maybe you could select areas touching polygon boundary features and then
v.overlay "not" them away from the culled version you already have.

note it will only work on features with cat numbers, so you'll have to give boundaries can numbs with v.category first. usually they don't have them.

Hamish