[GRASS-user] [GRASSLIST:1139] RE: Qn. on extracting from multiple rasters, data corresponding to vector polygons

[Jonathan Greenberg]

Vishal:

 

            We designed starspan to do exactly this - one of these days
we'll mod it so it works from within grass: starspan.casil.ucdavis.edu .  

 

 

--j

 

--

Jonathan A. Greenberg, PhD
NRC Research Associate
NASA Ames Research Center
MS 242-4
Moffett Field, CA 94035-1000
Phone: 415-794-5043
AIM: jgrn3007
MSN: jgrn3007 at hotmail.com 

  _____  

From: owner-GRASSLIST at baylor.edu [mailto:owner-GRASSLIST at baylor.edu] On
Behalf Of Vishal Mehta
Sent: Tuesday, June 27, 2006 3:47 AM
To: GRASS Users list
Subject: [GRASSLIST:1135] Qn. on extracting from multiple rasters, data
corresponding to vector polygons

 

Hi all,

I have a vector polygon shapefile which contains 8 polygons (each watershed
is a polygon). I also have some 100 GRASS raster files of environmental data
(rainfall, temperature etc).

Whats the best way to extract for each watershed, the corresponding average
data from each raster file and put it in a text file?

I've looked at v.what.rast but it seems to be quite cumbersome for this
application. I'm using Grass 6.0.1 on Ubuntu linux.

cheers,
vishal

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