[Qgis-user] Road graph topological editing

[toxjones at tiscali.it]

  Hello,

I imported in QGIS 1.5 a line vector layer representing roads (say arcs) 
of a city.
I would like to:
- create a new point vector layer with a point for each cross between lines;
- add two columns to the original line vector layer, indicating the 
cross before and after each road, respectively.

Any hint?

Thank you very much!
Toni