[GRASS-user] Merging connected stream lines

[Huidae Cho]

Cool, just updated my repository and it's now working. I'll have to see the
output to understand what I can do with it.

Thanks.
Huidae

On Fri, Oct 27, 2017 at 8:38 AM, Huidae Cho <grass4u at gmail.com> wrote:

> I'll check my revision. Thanks for the info.
>
> Also, I found that thinning the stream raster from r.watershed and
> converting it to vector doesn't really work well. When there are clumps of
> raster cells, flow directions get messed up. I tried your r.stream.extract
> to extract stream lines and its output makes much more sense. It would be
> great if this module also outputs unique stream "network" numbers.
>
> Thanks.
> Huidae
>
>
> On Fri, Oct 27, 2017 at 8:14 AM, Markus Metz <
> markus.metz.giswork at gmail.com> wrote:
>
>>
>>
>> On Fri, Oct 27, 2017 at 12:52 PM, Huidae Cho <grass4u at gmail.com> wrote:
>> >
>> > Actually, I'm getting the same error as Markus in the NC dataset. I
>> recently discleaned and rebuilt the latest SVN.
>>
>> In trunk, this bug appeared with r71267 and was fixed with r71477.
>> In relbr72, this bug appeared with r71268 and was fixed with r71478.
>>
>> Please check your revision.
>>
>> Markus M
>>
>> >
>> > Huidae
>> >
>> > On Thu, Oct 26, 2017 at 4:14 PM, Markus Metz <
>> markus.metz.giswork at gmail.com> wrote:
>> >>
>> >>
>> >>
>> >> On Thu, Oct 26, 2017 at 5:02 PM, Markus Neteler <neteler at osgeo.org>
>> wrote:
>> >> >
>> >> > 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?
>> >>
>> >> I can not reproduce these errors. Please update your local copy:
>> >> make distclean
>> >> svn --no-ignore status
>> >> svn up
>> >> configure
>> >> make
>> >>
>> >> Markus M
>> >> >
>> >> > Markus
>> >> > _______________________________________________
>> >> > grass-user mailing list
>> >> > grass-user at lists.osgeo.org
>> >> > https://lists.osgeo.org/mailman/listinfo/grass-user
>> >>
>> >>
>> >> _______________________________________________
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>> >
>> >
>>
>
>
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