[GRASS-user] Extract subnet from grass vector network based on selected nodes

[Stefan Blumentrath]

Hei Johannnes,

Maybe looping over the different possible combinations of nodes using https://grass.osgeo.org/grass72/manuals/v.net.path.html does the job?

Cheers
Stefan

From: grass-user [mailto:grass-user-bounces at lists.osgeo.org] On Behalf Of Johannes Radinger
Sent: onsdag 27. september 2017 13.12
To: GRASS user list <grass-user at lists.osgeo.org>
Subject: [GRASS-user] Extract subnet from grass vector network based on selected nodes

Hi,

I have a GRASS vector network that represents a river network (with many first order tributaries) and that has additional connected nodes that represent sampling sites.

I'd like to extract a minimum subnetwork of the full network that still connects a set of selected nodes (e.g. identified by their cat). However, network edges (i.e. river segments) that are not necessary to connect the sampling points should be excluded in the new subnetwork. Is there a function or process in GRASS GIS to extract such a subnetwork that fully connects a set of selected nodes?

Cheers,
Johannes
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/grass-user/attachments/20170927/b4941284/attachment-0001.html>