I have done something similar to visualize sampling density --
http://casoilresource.lawr.ucdavis.edu/drupal/node/172
commands are listed with some sample images.
Cheers,
Dylan
--
Dylan Beaudette
Soils and Biogeochemistry Graduate Group
University of California at Davis
530.754.7341
Nice images! That's a neat application for v.voronoi - I guess I never
considered mapping sampling density in that way before. I'll have to give it
a try with some of my data.
Thanks!
~ Eric.