[GRASS-user] v.net.allpairs - reduce number of calculations

[Markus Metz]

What about v.net.path to get shortest paths from a start node to a number
of end nodes?

Markus M

On Mon, Jan 11, 2021 at 2:32 PM Daniel McInerney <
daniel.o.mcinerney at gmail.com> wrote:
>
> Hi List,
>
> I've been using v.net.allpairs [1] for the calculation of shortest paths
> between pairs of nodes on a river network, and it is working very well.
> However, for some datasets there are several thousand individual nodes
> and I would like to reduce the associated processing time if possible.
>
> Based on the documentation and the current outputs, the module
> calculates the shortest paths between all pairs of nodes on the network.
> In my case, I'm only interested in the shortest paths from one specific
> node. I'm therefore,  wondering if it is possible to use the module in
> this way and limit the shortest path calculations from one node to all
> of the other nodes on network. I tried to use the 'cats' and 'where'
> options, but so far to no avail.
>
> I appreciate I am overlooking something, but would value any feedback or
> advice on how to reduce the associated processing time.
>
> Thanks in advance.
>
> Regards
>
> Daniel.
>
> [1]: https://grass.osgeo.org/grass79/manuals/v.net.allpairs.html
>
>
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