[GRASSLIST:1133] Re: sum of vector lengths within a polygon

[Radim Blazek]

On Monday 01 September 2003 00:39, Rado Bonk wrote:
> Hi GRASSusers,
>
> I'm working on the project where I need to know the total length of the
> channels within a watershed. The area of Slovakia was divided into 1386
> polygons, and valley bottoms coupled with active channels represent
> vectors. How to find the total length of vectors within the polygon? Did
> anybody use it in a any hydrological application?

In theory v.patch, v.spag, v.llabel, dig_att/ -> v.what, v.report (v.to.db) 
and sum by script but v.spag may fail.

Ra