[GRASS-user] Total length of river network

[Helmut Kudrnovsky]

Rich Shepard wrote
> I've looked at all the v.net* modules on the core and addon manual pages,
> and the v.stream* modules on the addon page without seeing a module that
> sums the lengths of each segment of a river system.
> 
> The map's database has 282 rows; one for each segment (I assume).
> 
> A pointer to a process to sum distances for the river system will be much
> appreciated.
> 
> Regards,
> 
> Rich
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> 
> river-network.png (169K)
> <http://osgeo-org.1560.x6.nabble.com/attachment/5414654/0/river-network.png>

v.to.db length of segments to the attribute table followed by a SQL
aggregate with the (v.)db.* modules?




-----
best regards
Helmut
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