[Qgis-user] network building tool

[G. Allegri]

Have you given a look at FlowMapper plugin?
http://plugins.qgis.org/plugins/FlowMapper/

Here you can find an example, without using the plugin but only a PostGIS
layer.

giovanni
Il 20/nov/2013 22:39 "Tim Michelsen" <timmichelsen at gmx-topmail.de> ha
scritto:

> >   Graphviz (http://www.graphviz.org/) will do most of what you
> > described, but I don't think you can specify the coordinates of the
> > nodes (that would be nice) so the result is just a diagram, not a map .
> Not exactly.
>
> Via
> Representation of network flows /
> http://gis.stackexchange.com/questions/778/representation-of-network-flows
>
> I found JFlowMap.
>
> It uses the approach I described:
> https://code.google.com/p/jflowmap/wiki/HowToPrepareData
>
> I just don't know if it can also export to shape...
>
>
> [question off-list:]
> > do you mean something that just draw the lines or that will
> create/manage actual line features?
> A line drawing tool which would allow to maintain connections of lines
> if nodes are shifted.
>
> The background for all is that the simlation and design tools for
> networks can export lines (e.g. power lines, telecom lines) or nodes as
> lists but no logical structure.
> A typical schema:
> http://en.wikipedia.org/wiki/File:Electricity_Grid_Schematic_English.svg
> http://en.wikipedia.org/wiki/File:One-line_diagram.svg
>
> So I wonder how others are transferring such information into the
> GIS/geo domain.
>
> Regards,
> Timmie
>
>
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