[GRASS-user] calculating road density

[maning sambale]

Hi,

I have two vectors in GRASS:
road network - line
grid - polygon

I want to compute road density and append the attributes to the grid poly.
In QGIS I tried using the vector tools (sum line length) with
shapefiles and it works for small areas bu not for my full region.
Any ideas?

-- 
cheers,
maning
------------------------------------------------------
"Freedom is still the most radical idea of all" -N.Branden
wiki: http://esambale.wikispaces.com/
blog: http://epsg4253.wordpress.com/
------------------------------------------------------