> > > So the solution I am dreaming of is: > > 1) prepare a point vector layer with all nodes having unique IDs > > (e.g. Paris, Madrid, Berlin) > > 2) have a table where all connecting lines are listed: > > LINE_NAME, LINE_START, LINE_END > > big tube , Paris, , Berlin > > big tube2 , Madrid, , Berlin > > big tube2 , Madrid, , Paris > > > > Then, a procedure would read the connections from the table and draw > > automatically these connecting lines between the nodes. > > If you want straight lines between nodes, it is easy. Otherwise you would have > to state rules for making the lines between the nodes, and it can be simple or > very complicated to automate according to the rules. See my workflow in: http://thread.gmane.org/gmane.comp.gis.qgis.user/24511/focus=24527
> Here is a PostGIS example of creating the edge geometry given to/from nodes : > https://gist.github.com/vpicavet/7572293 Do you think that this could be done as well with non-server based storage (shapefile, sqlite/spatialite)? > This behaviour is transparent for a visualization client, QGIS for exemple. Great. give me some time to test on it. Thanks for your follow-up. _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
