[GRASS-user] Merging connected stream lines

[Huidae Cho]

Hi list!

I couldn't find an easy way to merge connected stream lines per network
(stream output from r.watershed thinned and converted to vector). I'm not
even sure if stream lines with tributaries can be merged into one feature.
v.build.polylines merges multiple continuous lines, but it starts a new
line at a confluence. If merging multiple lines with shared nodes is
topologically impossible, what would be the best way to select all
connected line features or assign the same category to those lines?

Any suggestions are welcome!

Thanks!
Huidae
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