[GRASSLIST:138] How to report length totals for all lines matching specific ID

[Patton, Eric]

I have a vector of a coastline; the coast is segmented into different
coastal types, according to unique IDs:

CAT Class_ID CLASS         SEG_LENGTH
1   5        Rock Cliff    56.789000
2   7        Barrier Beach 13.450000
....


I successfully popluated the SEG_LENGTH column with the length of each
segment using v.to.db:

v.to.db Coastal_Classes option=length type=line units=m

Now I want to report total lengths of each CLASS (i.e., total length of all
"Rock Cliff" segments, etc.)

Any ideas?

~ Eric.