[GRASSLIST:5875] How to Create Proportional Symbols for Concentrations?

GRASS GRASS user
1

I've managed to import a dbf table of PAH concentrations for sample
locations into Grass 6.0 using db.connect driver=dbf and then v.in.db
x=Longitude y=Latitude key=PAH_ppm. Is there a way to symbolize the vector
points so that their sizes are proportional to their concentration values?

Thanks,

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~ Eric.

2

I've managed to import a dbf table of PAH concentrations for sample
locations into Grass 6.0 using db.connect driver=dbf and then v.in.db
x=Longitude y=Latitude key=PAH_ppm. Is there a way to symbolize the
vector points so that their sizes are proportional to their
concentration values?

Sure, use 'd.vect.chart ctype=pie sizecol=' with only one data column.

Alternatively use d.vect or v.buffer+v.patch looped in a script?

Hamish