Hi Markus, 2014-11-05 9:59 GMT+01:00 Markus Metz <[email protected]>:
> On Tue, Nov 4, 2014 at 11:17 PM, matteo marcantonio > <[email protected]> wrote: > > Hello list, > > > > I'm writing since I need to clean a line vector (road network) removing > all > > the line segments not connected to other segments. I guess that I need to > > remove all the segment that have valence = 0. > > > > I need to remove them to perform a network distance analysis avoiding the > > issue of unreachable nodes. > > > > Is there any way to do it? > > You could use v.net.alloc with one node and then extract the allocated > network. This will automatically discard all lines not connected to > this node. > This is a good suggestion but it is not exactly what I need. I need to connect all my nodes to the main road network avoiding that a node is connected to a 'dead road segment' (being unreachable by v.net.distance). So I need to clean my road network, removing all the 'isolated road segment' (or 'valence=0). Any suggestion? > Markus M > > > > > Thanks for any help > > > > Matteo > > > Matteo > > -- > > -- > > Matteo Marcantonio > > > > PhD Candidate > > GIS & Remote Sensing > > Fondazione Edmund Mach (FEM) - Research & Innovation Centre (CRI) > > > > [email protected] > > > > +39 461615669 (Office) > > +39 3204240538 (Mobile) > > > > http://gis.cri.fmach.it > > > > > > _______________________________________________ > > grass-user mailing list > > [email protected] > > http://lists.osgeo.org/mailman/listinfo/grass-user > -- -- Matteo Marcantonio *PhD Candidate* *GIS & Remote Sensing* *Fondazione Edmund Mach (FEM) - Research & Innovation Centre (CRI)* [email protected] +39 461615669 (Office) +39 3204240538 (Mobile) http://gis.cri.fmach.it <http://gis.cri.fmach.it/people/>
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