[Qgis-user] network building tool

[Tim Michelsen]

> 
> > 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.