Questions working with vector data
Radim.Blazek at dhv.cz
Sat Jun 24 07:04:11 EDT 2000
> As for what I want to do: The three coverages are of tracts, roads, and
> journey to work data. What I want to do is display the road network
> with different colors for each class of roadway (an attribute attached
> to each road segment) and show the number of workers from any tract
> traveling to any of a set of tracts somewhere else in the region.
To create ps map with line width based on number of travelers you can use
# blue color stripe
cwidth 0.001 # 1 point ~ 1000 in category
ref left # justification => direction from start to end of line
label Number of workers (1pnt~1000 workers) # legend label
# black outline
See ps.map.new man.
More information about the grass-user