[GRASSLIST:805] Re: Automatic creation of Areas (polygons) from connected lines

[tlaronde at polynum.org]

En réponse à Moritz Lennert <mlennert at club.worldonline.be>:

> tlaronde at polynum.org said:
> > Hello,
> >
> > I suspect the question has already been asked, but I didn't
> > find an obvious answer.
> >
> > Given a vector file with a correct topology (all lines are
> > connected and broken at nodes) is there a "magic" modules
> > allowing the creation of areas (parcels) from this vector
> > file? [to go the raster way is not an option here due to the
> > precision and hence the size of the resulting file]
> 
> 
> Could you please be a bit more specific:
> 
> - in what format is you correct vector file ?
> - does this file contain lines and you want to transform them into areas
> ?
> 
> 
> - If your file is in GRASS format and contains lines that you wish to
> transform into areas, you can try v.line2area.

Thanks for the reply. Eventually I already found the answer in a message :

(this is GRASS vector format)
v.line2area
v.alabel

do the job perfectly.

BTW, I suggest for newcomers like me to emplasize in the doc the fact that
GRASS is a topology engine able to build aread from edges : no need to import
CAD shapes and so on (that has mistaken me at the begining).