[Qgis-user] Kernel smoothing

[Luciano La Sala]

Hi all, 

I am using QGIS 1.8.0 on Windows 7. Using GRASS, I transformed several
shapefiles (all polygons) into raster maps, then I assigned certain values
of interest to the pixels, and finally combined all five rasters into one
using GRASS raster map calculator. Now I need to apply a kernel smoothing to
the raster for easier interpretation of the thematic map, which is a risk
map with different colors according different risk estimate for that cell
(pixel value). 
How do I perform kernel smoothin on this raster from QGIS? Is there a
specific python plug-in for this? I read something about "Point sampling
tool plugin for QGIS" but I just can't seem to get it installed. 
Here I shale the link to a brief note I found on "How to sample raster
datasets using points in QGIS", but as I said there seems to be no plug-in
to be installed! Very weird. 

http://www.gistutor.com/quantum-gis/19-beginner-quantum-gis-tutorials/54-how
-to-sample-raster-datasets-using-points-in-quantum-gis-qgis.html       

Thank you in advance. 

Luciano 
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