[GRASSLIST:7602] Re: making v.what.rast work

[Jonathan Greenberg]

Also, can I suggest checking out this program we developed over at UC Davis
which will, hopefully someday, be ported to a more grass-friendly interface:

http://casil.ucdavis.edu/projects/starspan

Its a program to efficiently extract raster data based on vector data -- we
have a lot of options that don't exist in r.what, and there's now a unix
(including mac) and windows port + gui...  If you do use it, please let the
developer know and post any suggestions you might have!

--j


On 7/18/05 12:13 PM, "David Finlayson" <david.p.finlayson at gmail.com> wrote:

> 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
>> 
>> 
> 


-- 
Jonathan A. Greenberg, PhD
NRC Research Associate
NASA Ames Research Center
MS 242-4
Moffett Field, CA 94035-1000
650-604-5896
AIM: jgrn307
MSN: jgrn307 at hotmail.com