[GRASSLIST:7601] Re: making v.what.rast work

[Tom Colson]

 here's a sample

V.category myfile out=myfile_cat op=add

Echo 'create table myfile_cat (cat integer, height double)' | db.execute

V.db.connect map=myfile_cat table=myfile_cat driver=dbf

V.to.db map=myfile_cat op=cat

V.what.rast vect=myfile_cat rast=myraster


Thomas Colson
North Carolina State University
Department of Forestry and Environmental Resources
(919) 673 8023
tom_colson at ncsu.edu

Calendar:
www4.ncsu.edu/~tpcolson
 

-----Original Message-----
From: owner-GRASSLIST at baylor.edu [mailto:owner-GRASSLIST at baylor.edu] On
Behalf Of David Finlayson
Sent: Monday, July 18, 2005 3:13 PM
To: Eva L. Hulse
Cc: GRASSLIST at baylor.edu
Subject: [GRASSLIST:7599] Re: making v.what.rast work

Have you looked at the command r.what?

http://grass.itc.it/grass60/manuals/html60_user/r.what.html

David

On 7/18/05, Eva L. Hulse <evahulse at buffalo.edu> wrote:
> I have a raster created from interpolated elevation points, and i have 
> a vector of soil sample locations for the same area.  I want to use 
> v.what.rast to get the elevation (z) from the raster, for each (x,y) 
> point in the vector file.  I imported the vector grid from ascii text 
> with the columns x, y, and z.  The value of z is currently 0.  I also 
> imported the original elevation points file from ascii text (that i 
> later turned into a raster using v.surf.rst).
> 
> Right now, what happens is this:
> v.what.rast vector=kknGrid raster=kkn_mod_elev_surf column=z
> 
> Cannot get layer info for vector map
> 
> But since i really have no idea what i'm doing, can someone tell me 
> how i can obtain the elusive "layer info for vector map"?
> 
> --
> ---------------------------------------------
> Eva L. Hulse
> PhD Student
> University at Buffalo Anthropology Department evahulse at buffalo.edu
> 
> 


--
David Finlayson
Marine Geology & Geophysics
School of Oceanography
Box 357940
University of Washington
Seattle, WA  98195-7940
USA

Office: Marine Sciences Building, Room 112
Phone: (206) 616-9407
Web: http://students.washington.edu/dfinlays