Hi Sandro, Thanks a lot for these explanations, things are getting clearer.
The difference between planar and network topology is that edges can cross without being connected, right?
I will rebuild postgis and go further!!! Again, many thanks for your work! Denis _______________________________________________ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
