[Qgis-user] network building tool

[Andreas Neumann]

Hi Tim,

In Switzerland we are in the process of developing application modules
for waste-water and clean water networks.

However, as it is a lot of work to develop and test and requires a lot
of financial funding it will take 1-2 years until first production
versions are around.

Denis Rouzaud from SIGE, however, has some QGIS plugins that help
managing clean water networks. You may want to contact him directly.

You may also want to re-ask your question on the dev list where there
are more developers around than on the users list.

Andreas

Am 20.11.2013 17:40, schrieb Tim Michelsen:
> Dear list,
> I am looking for a tool or plugin that could help me building the basis for
> an infrastructure network (e.g. eletrical grids, gas or water piping
> network, etc.).
> 
> The areas I am working do usually not have a good topographic mapping basis
> and no infrastructure.
> 
> Usually, I would have the coordinates of the nodes (e.g. substations or
> pumping stations) as a result from a survey or data gathering from a provider.
> 
> In a next step, I would need to build a network.
> 
> This be all done manually:
> 1) digitise the nodes
> 2) digitise the lines interconnecting the nodes depending on charateristics
> (e.g. tube diameter, drinking water or grey water)
> 
> Now the difficulty is when a node was digitised wrongly or needs to be
> corrected, all lines connecting to this node would need to be changed.
> 
> 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.
> These could then slightly adjusted manually be adding more vertices or alike.
> But the procedure would easy up the effort of building the network.
> And in the ideal case, it would also take care of updating the lines if a
> node is shifted on the map.
> (Similar to a "connector" line in an Openoffice Impress drawing)
> 
> The closes tool I found so far is the 
> https://plugins.qgis.org/plugins/FlowMapper/
> But I think it's too complicated for my purpose.
> 
> I would really appreciate to receive any pointers or suggestions.
> 
> Thanks a lot in advance,
> Kind regards,
> Timmie
> 
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