[GRASS-user] Quick question

[Maciej Sieczka]

Richard Chirgwin wrote:

> I've imported some MapInfo maps.
> 
> The problem is that there are 38,000 areas, and some have imported with
> their centroids and boundaries, but without the areas.

GRASS "area" is a closed boundary(ies) + centroid inside.

> How do I re-create the missing areas from a set of boundaries and
> centroids?

You *propably* need to close boundaries, by snapping their
nodes. Depending on your dataset you might try v.clean
tool=snap to automate this.

> ( I have tried V.build but it still arrives with empty areas).

v.build is not the right tool.

Maciek