Hi Johannes, one way might be using v.to.points and setting dmax=250 (so that the points are at most 250m apart):
v.to.points -vi input=river output=river_pt250m dmax=250 Regards, Pedro 2014-09-23 20:00 GMT+01:00 <grass-user-requ...@lists.osgeo.org>: > Send grass-user mailing list submissions to > grass-user@lists.osgeo.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.osgeo.org/mailman/listinfo/grass-user > or, via email, send a message with subject or body 'help' to > grass-user-requ...@lists.osgeo.org > > You can reach the person managing the list at > grass-user-ow...@lists.osgeo.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of grass-user digest..." > > > Today's Topics: > > 1. Equidistant points along lines of a vector network > (Johannes Radinger) > 2. Re: Equidistant points along lines of a vector network > (Moritz Lennert) > 3. Re: problem to install grass70 on ubuntu 12.04 (Markus Neteler) > 4. Re: Equidistant points along lines of a vector network > (C?sar Augusto Ram?rez Franco) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 23 Sep 2014 10:23:58 +0200 > From: Johannes Radinger < > > johannesradin...@gmail.com> > To: GRASS user list <grass-user@lists.osgeo.org> > Subject: [GRASS-user] Equidistant points along lines of a vector > network > Message-ID: > <CABsGe_w67ovb= > 3y+remqoptcb5yvwoubw4dvy5cbogf1p2m...@mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > Hi, > > I've got a vector network (river network) and I want to place points > along that network. The points should be placed every 250 m starting > from the outlet. Any network junctions should be ignored so that every > point is 250 apart from the next upstream and downstream point. > > With the tool v.segment only the single parts of the polyline (lines > between > nodes) are splitted based on the distance parameter. So v.segment ignores > the network. Maybe v.net.iso can be of use in this case, but here I am > missing > the option to create points in given distance classes from a starting > point. > > > Is there any specific GRASS tool or procedure for such tasks? > Any suggestions? > > Best regards, > Johannes > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://lists.osgeo.org/pipermail/grass-user/attachments/20140923/5bc459af/attachment-0001.html > > > > ------------------------------ > > Message: 2 > Date: Tue, 23 Sep 2014 14:39:51 +0200 > From: Moritz Lennert <mlenn...@club.worldonline.be> > To: Johannes Radinger <johannesradin...@gmail.com>, GRASS user list > <grass-user@lists.osgeo.org> > Subject: Re: [GRASS-user] Equidistant points along lines of a vector > network > Message-ID: <54216a17.2030...@club.worldonline.be> > Content-Type: text/plain; charset=windows-1252; format=flowed > > On 23/09/14 10:23, Johannes Radinger wrote: > > Hi, > > > > I've got a vector network (river network) and I want to place points > > along that network. The points should be placed every 250 m starting > > from the outlet. Any network junctions should be ignored so that every > > point is 250 apart from the next upstream and downstream point. > > > > With the tool v.segment only the single parts of the polyline (lines > between > > nodes) are splitted based on the distance parameter. So v.segment ignores > > the network. Maybe v.net.iso can be of use in this case, but here I am > > missing > > the option to create points in given distance classes from a starting > point. > > > > > > Is there any specific GRASS tool or procedure for such tasks? > > Would v.build.polylines help here ? I don't know how v.segment acts on > polylines. > > Moritz > > > ------------------------------ > > Message: 3 > Date: Tue, 23 Sep 2014 16:51:25 +0200 > From: Markus Neteler <nete...@osgeo.org> > To: Rashad M <mohammedrasha...@gmail.com> > Cc: GRASS user list <grass-user@lists.osgeo.org>, Mohammed Rashad > <rasha...@gmail.com>, "t...@wildintellect.com" > <t...@wildintellect.com> > Subject: Re: [GRASS-user] problem to install grass70 on ubuntu 12.04 > Message-ID: > <CALFmHhtp7=8F= > 4s0o+t9yoeaoanm6skw0khctey2mnjtxco...@mail.gmail.com> > Content-Type: text/plain; charset=UTF-8 > > Hi, > > just FYI - the person who asked for my assistance with Ubuntu, got it > running after these two steps (as not being an Ubuntu user I don't > know what it means): > > software-properties-gtk > sudo apt-get update > > Once these two steps made, the GRASS packages appeared in the Software > Center under GRASS Packages stable series. > > ... thought to post that here, maybe useful. > > Markus > > > ------------------------------ > > Message: 4 > Date: Tue, 23 Sep 2014 13:44:25 -0500 > From: C?sar Augusto Ram?rez Franco <caesar...@gmail.com> > To: Moritz Lennert <mlenn...@club.worldonline.be> > Cc: GRASS user list <grass-user@lists.osgeo.org>, Johannes Radinger > <johannesradin...@gmail.com> > Subject: Re: [GRASS-user] Equidistant points along lines of a vector > network > Message-ID: > <CAJDYei= > crcusqkkhsans8tlxyeewzemz5au_c2hc22n5rl8...@mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > Have you tried v.points module? > > 2014-09-23 7:39 GMT-05:00 Moritz Lennert <mlenn...@club.worldonline.be>: > > > On 23/09/14 10:23, Johannes Radinger wrote: > > > >> Hi, > >> > >> I've got a vector network (river network) and I want to place points > >> along that network. The points should be placed every 250 m starting > >> from the outlet. Any network junctions should be ignored so that every > >> point is 250 apart from the next upstream and downstream point. > >> > >> With the tool v.segment only the single parts of the polyline (lines > >> between > >> nodes) are splitted based on the distance parameter. So v.segment > ignores > >> the network. Maybe v.net.iso can be of use in this case, but here I am > >> missing > >> the option to create points in given distance classes from a starting > >> point. > >> > >> > >> Is there any specific GRASS tool or procedure for such tasks? > >> > > > > Would v.build.polylines help here ? I don't know how v.segment acts on > > polylines. > > > > Moritz > > _______________________________________________ > > grass-user mailing list > > grass-user@lists.osgeo.org > > http://lists.osgeo.org/mailman/listinfo/grass-user > > > > > > -- > *C?sar Augusto Ram?rez Franco* > Laboratorio de Sistemas Complejos Naturales > Escuela de Geociencias > Facultad de Ciencias > Universidad Nacional de Colombia - Sede Medell?n > Tel?fono: (57-4) 430 9369 - 300 459 6085 > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://lists.osgeo.org/pipermail/grass-user/attachments/20140923/14347dd3/attachment-0001.html > > > > ------------------------------ > > _______________________________________________ > grass-user mailing list > grass-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/grass-user > > End of grass-user Digest, Vol 101, Issue 34 > ******************************************* > -- Pedro Palheiro
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