[GRASS-user] Creating a ground water from a vector files of contours?

[Moskovitz, Bob]

Hi Dylan,

Looks like I was asking the computer to eat more then it can chew :-)  I have tried a smaller area and v.surf.rst did finish in good time.  Now I have another problem.  v.surf.rst seem to ignore the contours, but it noticed the centroids.  I see a bunch of bulls-eyes all over my map.  I guess I have missed a step?

Bob

-----Original Message-----
From: Dylan Beaudette [mailto:dylan.beaudette at gmail.com]
Sent: Monday, February 05, 2007 1:39 PM
To: grassuser at grass.itc.it
Cc: Moskovitz, Bob
Subject: Re: [GRASS-user] Creating a ground water from a vector files of
contours?


Hi Bob,

What have you defined your region as: i.e. what is the cell size, and what 
sort of area are you dealing with? If the cell size is too small, or your 
have defined a very large area, then v.surf.rst will take a very long time -- 
possibly producing a finer grid than really needed.

That aside, contour data can sometimes be a troublesome source for an 
interpolation. Also, for VERY large datasets (small resolution / large area) 
you might try some other interpolator. check the archives for some ideas.

Cheers,

Dylan

On Monday 05 February 2007 12:50, Moskovitz, Bob wrote:
> Hello Grassusers,
>
> Like the subject line says, I need help creating a ground water map using a
> vector file of contours.  The ground water file came from a E00 file that
> was read into Grass using v.in.e00.  I am currently running v.surf.rst
> which is taking a long time to run.  Are there other ways to do this
> problem?
>
> Thanks in advance,
> Bob
>
> Bob Moskovitz
> Seismic Hazards Zonation Program
> California Geological Survey
> http://gmw.consrv.ca.gov/shmp
>
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-- 
Dylan Beaudette
Soils and Biogeochemistry Graduate Group
University of California at Davis
530.754.7341