[GRASS-user] Merging connected stream lines

[Markus Neteler]

On Thu, Oct 26, 2017 at 9:58 AM, Stefan Blumentrath
<Stefan.Blumentrath at nina.no> wrote:
> Hi,
>
> Did you try:
>
> https://grass.osgeo.org/grass72/manuals/v.net.components.html
>
> That might give you a common attribute for all connected lines in your
> network…

I just tried that with NC but:

GRASS 7.3.svn (nc_spm_08_grass7):~ > v.net.components input=roadsmajor
output=roadsmajor_components method=strong
Building graph...
Registering arcs...
 100%
Flattening the graph...
ERROR: GngFlatten error


GRASS 7.3.svn (nc_spm_08_grass7):~ > v.net.components input=railroads
output=railroads_components method=strong
Building graph...
Registering arcs...
 100%
Flattening the graph...
ERROR: GngFlatten error

Does the network need any special treatment?

Markus