You should take a look at v.what.rast.  According to the manual:
        v.what.rast reads raster value for each point in the vector and updates 
col column in vector attribute table by this value. 
        The column should be type number (integer, float, double, ... ). If 
more points have the same category, attribute value is set 
        to NULL. If raster values is NULL, attribute value is set to NULL.

-Bob


Bob Moskovitz
Seismic Hazards Mapping Program
California Geological Survey

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-----Original Message-----
From: grass-user-boun...@lists.osgeo.org 
[mailto:grass-user-boun...@lists.osgeo.org] On Behalf Of Susana Arciniegas
Sent: Friday, July 23, 2010 3:26 PM
To: grass-user@lists.osgeo.org
Subject: [GRASS-user] Surface spot interpolates heights for pointis in a 
feature class from surface
Importance: High

I found tool "Tools for point layer (Herramientas para capas de puntos)/ 
Interpolate Raster (Muestrear capa raster)" in SEXTANTE, it is similar to 
"Surface Spot" of ArcGis, I need to found it, in Grass GIS 6.40ORC6, but I can 
not.
The tool interpolates heights for points in a feature class from a surface (ex: 
DTM). The point heights (interpolate heights) are stored in a field that's 
added to the input feature class.
Thank you for your answer
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