[Qgis-user] river network to basin: external boundary

[Robert Szczepanek]

Hi Agustin,

You can try with
Vector > Geoprocessing tools > Buffer(s)
Enable 'Dissolve buffer results'.
With your vector for sure it will take time ...

Robert

Agustin Lobo pisze:
> Hi!
> how could I get a polygon to approach the river basin from a river 
> network? Is this something that could be
> done with fTools? (note: the convex hull is not the solution, as the basin
> is not convex)
> 
> see figure here
> http://sites.google.com/site/eospansite/dummy/rnetwork.jpg
> 
> Thanks
> 
> Agus
> 
> 
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