Details Ticket 3272


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Serial Number 3272
Subject Region windowing for vectors
Area wish6
Queue grass
Requestors gwurman@asu.edu
Owner none
Status open
Last User Contact Wed May 25 04:43:39 2005 (3 yr ago)
Current Priority 30
Final Priority 70
Due No date assigned
Last Action Wed May 25 04:43:39 2005 (3 yr ago)
Created Mon May 23 19:07:46 2005 (3 yr ago)

Transaction History Ticket 3272


Mon, May 23 2005 19:07:46    Request created by guest  
Subject: Region windowing for vectors

Platform: Solaris2.X/Sparc
grass obtained from: CVS
grass binary for platform: Compiled from Sources

I would like to be able to output vectors windowed to the current region.  The
current best way to do this is through either v.select or v.overlay, but neither
of these quite does the trick when it comes to 3D vectors.

Certain functions, like v.delaunay, have a -r switch to window the vector to
the current region, and it would be nice if v.out.ascii had the same switch.
Thanks,
Gilead Wurman
ASU Active Tectonics
Wed, May 25 2005 02:02:40    Mail sent by hamish_nospam@yahoo.com  
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Date Wed, 25 May 2005 12:02:15 +1200
From Hamish <hamish_nospam@yahoo.com>
To Request Tracker <grass-bugs@intevation.de>
Cc grass5@grass.itc.it
Subject Re: [GRASS5] [bug #3272] (grass) Region windowing for vectors
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> I would like to be able to output vectors windowed to the current
> region.  The current best way to do this is through either v.select or
> v.overlay, but neither of these quite does the trick when it comes to
> 3D vectors.

Are you trying to crop by elevation as well as x,y extent?

> Certain functions, like v.delaunay, have a -r switch to window the
> vector to the current region, and it would be nice if v.out.ascii had
> the same switch.

v.in.region + v.overlay/v.select is the general way.

If I understand correctly, you would like v.in.region to get a "-3" flag
to import a 3D region cube, and then have v.overlay and/or v.select
respect the z value?



Hamish


Wed, May 25 2005 04:43:39    Mail sent by guest  
> Are you trying to crop by elevation as well as x,y extent?

For the most part, I don't really care about elevation, although it's
certainly potentially useful.

> v.in.region + v.overlay/v.select is the general way.
> 
> If I understand correctly, you would like v.in.region to get a "-3" flag
> to import a 3D region cube, and then have v.overlay and/or v.select
> respect the z value?

This would certainly work, although I would need it for both v.select and
v.overlay, since I do need to use both of them, at least the way they are set
up now.  If point capability were added to v.overlay, I wouldn't need v.select
at all.

Thanks,
Gilead
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