[GRASS-user] [GRASSLIST:1135] Qn. on extracting from multiple rasters, data corresponding to vector polygons

Vishal Mehta vishalm1975 at gmail.com
Tue Jun 27 06:46:38 EDT 2006

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.

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