How can I associate in QGIS one point layer to one line layer
A sample scenario could be this one:
- A point layer "Valves" and line layer "Pipelines"
- Each layer should have its own set of attributes
- A "pipeline" has to begin and end in one "valve"
- A change in the "Valves" geometry implies a change in the "Pipelines" geometry, i.e., if I move a "valve", the "pipelines" connected to that node should follow the node wich are connected to