[GRASS-dev] Streams extraction from streams map

[Markus Neteler]

Hi,

I have a network of streams (say, Spearfish or better the new
NC data set at http://mpa.itc.it/grasstutor/data_menu3rd.phtml )
and want to extract a single stream system. Names are lacking,
is there any trick to extract topologically connected lines
into a new map?

Markus