[GRASS-user] measure distance

[Achim Kisseler]

Hi grass-users,

I am going to measure the distance from one centroid to another for many
polygons in a layer in order to update the table with the distance.

What would be a way? The only I can imagine so far is:
- collecting coordinates
- building lines from them
- update length of lines
- update old table

Is there another, better and faster way? Shouldn't be measuring of
distances a common tool? Do I just don't find it? Do I understand
v.distance wrong (it just returns the cat of the nearest feature)?

Achim