[GRASS-dev] 3D vector + DB table

[Hamish]

Alfonso Vitti wrote:
> does anybody know if it is possible to have a 3D vector with faces 
> entities linked to a DB table?
> I have data about an urban area. Buildings are composed by walls and 
> roofs faces, I'd like to import the data in GRASS preserving the 
> geometry and the "building element" as much as possible and to link
> the  resulting vector to a DB table.
> nviz has some capabilities to allow the mouse selection of vector 
> entities and the visualization of the associated DB records. Is it 
> possible for any 3D geometry entities, including faces, or only for 
> vector points?

give faces of the same building a common category number.

maybe v.extract to select only buildings you want.

I think Markus has already done this? See screenshots of 3D Trento:

http://mirror.aarnet.edu.au/pub/grass/grass61/screenshots/images/qgis08_grass6_toolbox.png



Hamish