Is it possible to allocate nodes to areas by assigning the number of the area (or the content of another attribute) to all nodes that lay inside of the zone polygon?
Yes, proceed as follows: 1) Create a user-defined attribute on nodes that will obtain the zone number (alternatively use an addValue). 2) Nodes -> (Right-clicking) -> Multi-edit -> (Choose this user-defined attribute or an addValue) -> Intersect. 3) In the dialog 'Generate attribute value by intersection with source attribute' -> = Minimum or Maximum (overlapping zones of course not allowed). 4) Parameter for source objects: - Network object zones. - Attribute number.