[GRASS-user] How to find all vectors that overlay a given region

[Patton, Eric]

Sorry; I'll clarify. I meant how to find the number of vector maps, regardless of vector type, that overlay a given region. I'm really only interested in the map names.

~ Eric.


-----Original Message-----
From: Michael Barton [mailto:michael.barton at asu.edu]
Sent: Mon 9/17/2007 4:25 PM
To: Patton, Eric; grassuser at grass.itc.it
Subject: Re: [GRASS-user] How to find all vectors that overlay a given region
 
It also depends on what you mean by 'how many vectors'. Number of points,
lines, segments, areas, centroids, etc. v.info gives some of this
information.

Michael


On 9/17/07 11:29 AM, "Patton, Eric" <epatton at nrcan.gc.ca> wrote:

> Hi,
> 
> I'm trying to find out how to determine how many vectors in an entire mapset
> overlay a given region. What is the best approach to do this - import the
> current region as a vector using v.in.region (type parameter as area), then
> run v.select on every vector in the mapset in a loop, or is there a better
> way? I see that v.overlay/v.select takes one map as input for both the ainput
> and binput parameters.
> 
> How hard would it be to change the structures in v.select to accept multiple
> inputs, or is this even feasible?
> 
> Thanks,
> 
> ~ Eric.
> 
> 

__________________________________________
Michael Barton, Professor of Anthropology
Director of Graduate Studies
School of Human Evolution & Social Change
Center for Social Dynamics and Complexity
Arizona State University

phone: 480-965-6213
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