<div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif">Hi Johannes, <br><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif">one way might be using v.to.points and setting dmax=250 (so that the points are at most 250m apart):<br><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif">v.to.points -vi input=river output=river_pt250m dmax=250<br><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif">Regards,<br>Pedro<br></div><div class="gmail_default" style="font-family:tahoma,sans-serif"><br><br></div><div class="gmail_extra"><br><div class="gmail_quote">2014-09-23 20:00 GMT+01:00 <span dir="ltr"><<a href="mailto:grass-user-request@lists.osgeo.org" target="_blank">grass-user-request@lists.osgeo.org</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Send grass-user mailing list submissions to<br>
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Today's Topics:<br>
<br>
1. Equidistant points along lines of a vector network<br>
(Johannes Radinger)<br>
2. Re: Equidistant points along lines of a vector network<br>
(Moritz Lennert)<br>
3. Re: problem to install grass70 on ubuntu 12.04 (Markus Neteler)<br>
4. Re: Equidistant points along lines of a vector network<br>
(C?sar Augusto Ram?rez Franco)<br>
<br>
<br>
----------------------------------------------------------------------<br>
<br>
Message: 1<br>
Date: Tue, 23 Sep 2014 10:23:58 +0200<br>
From: Johannes Radinger <<a href="mailto:johannesradinger@gmail.com"><div class="gmail_default" style="font-family:tahoma,sans-serif;display:inline"></div>johannesradinger@gmail.com</a>><br>
To: GRASS user list <<a href="mailto:grass-user@lists.osgeo.org">grass-user@lists.osgeo.org</a>><br>
Subject: [GRASS-user] Equidistant points along lines of a vector<br>
network<br>
Message-ID:<br>
<CABsGe_w67ovb=<a href="mailto:3Y%2BREmQoptCb5YVwoUbW4DVy5cbOgF1p2MaLQ@mail.gmail.com">3Y+REmQoptCb5YVwoUbW4DVy5cbOgF1p2MaLQ@mail.gmail.com</a>><br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
Hi,<br>
<br>
I've got a vector network (river network) and I want to place points<br>
along that network. The points should be placed every 250 m starting<br>
from the outlet. Any network junctions should be ignored so that every<br>
point is 250 apart from the next upstream and downstream point.<br>
<br>
With the tool v.segment only the single parts of the polyline (lines between<br>
nodes) are splitted based on the distance parameter. So v.segment ignores<br>
the network. Maybe v.net.iso can be of use in this case, but here I am<br>
missing<br>
the option to create points in given distance classes from a starting point.<br>
<br>
<br>
Is there any specific GRASS tool or procedure for such tasks?<br>
Any suggestions?<br>
<br>
Best regards,<br>
Johannes<br>
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Message: 2<br>
Date: Tue, 23 Sep 2014 14:39:51 +0200<br>
From: Moritz Lennert <<a href="mailto:mlennert@club.worldonline.be">mlennert@club.worldonline.be</a>><br>
To: Johannes Radinger <<a href="mailto:johannesradinger@gmail.com">johannesradinger@gmail.com</a>>, GRASS user list<br>
<<a href="mailto:grass-user@lists.osgeo.org">grass-user@lists.osgeo.org</a>><br>
Subject: Re: [GRASS-user] Equidistant points along lines of a vector<br>
network<br>
Message-ID: <<a href="mailto:54216A17.2030507@club.worldonline.be">54216A17.2030507@club.worldonline.be</a>><br>
Content-Type: text/plain; charset=windows-1252; format=flowed<br>
<br>
On 23/09/14 10:23, Johannes Radinger wrote:<br>
> Hi,<br>
><br>
> I've got a vector network (river network) and I want to place points<br>
> along that network. The points should be placed every 250 m starting<br>
> from the outlet. Any network junctions should be ignored so that every<br>
> point is 250 apart from the next upstream and downstream point.<br>
><br>
> With the tool v.segment only the single parts of the polyline (lines between<br>
> nodes) are splitted based on the distance parameter. So v.segment ignores<br>
> the network. Maybe v.net.iso can be of use in this case, but here I am<br>
> missing<br>
> the option to create points in given distance classes from a starting point.<br>
><br>
><br>
> Is there any specific GRASS tool or procedure for such tasks?<br>
<br>
Would v.build.polylines help here ? I don't know how v.segment acts on<br>
polylines.<br>
<br>
Moritz<br>
<br>
<br>
------------------------------<br>
<br>
Message: 3<br>
Date: Tue, 23 Sep 2014 16:51:25 +0200<br>
From: Markus Neteler <<a href="mailto:neteler@osgeo.org">neteler@osgeo.org</a>><br>
To: Rashad M <<a href="mailto:mohammedrashadkm@gmail.com">mohammedrashadkm@gmail.com</a>><br>
Cc: GRASS user list <<a href="mailto:grass-user@lists.osgeo.org">grass-user@lists.osgeo.org</a>>, Mohammed Rashad<br>
<<a href="mailto:rashadkm@gmail.com">rashadkm@gmail.com</a>>, "<a href="mailto:tech@wildintellect.com">tech@wildintellect.com</a>"<br>
<<a href="mailto:tech@wildintellect.com">tech@wildintellect.com</a>><br>
Subject: Re: [GRASS-user] problem to install grass70 on ubuntu 12.04<br>
Message-ID:<br>
<CALFmHhtp7=8F=<a href="mailto:4S0O%2BT9yOeaOaNM6SKw0kHctey2MNjtXCoeNw@mail.gmail.com">4S0O+T9yOeaOaNM6SKw0kHctey2MNjtXCoeNw@mail.gmail.com</a>><br>
Content-Type: text/plain; charset=UTF-8<br>
<br>
Hi,<br>
<br>
just FYI - the person who asked for my assistance with Ubuntu, got it<br>
running after these two steps (as not being an Ubuntu user I don't<br>
know what it means):<br>
<br>
software-properties-gtk<br>
sudo apt-get update<br>
<br>
Once these two steps made, the GRASS packages appeared in the Software<br>
Center under GRASS Packages stable series.<br>
<br>
... thought to post that here, maybe useful.<br>
<br>
Markus<br>
<br>
<br>
------------------------------<br>
<br>
Message: 4<br>
Date: Tue, 23 Sep 2014 13:44:25 -0500<br>
From: C?sar Augusto Ram?rez Franco <<a href="mailto:caesarivs@gmail.com">caesarivs@gmail.com</a>><br>
To: Moritz Lennert <<a href="mailto:mlennert@club.worldonline.be">mlennert@club.worldonline.be</a>><br>
Cc: GRASS user list <<a href="mailto:grass-user@lists.osgeo.org">grass-user@lists.osgeo.org</a>>, Johannes Radinger<br>
<<a href="mailto:johannesradinger@gmail.com">johannesradinger@gmail.com</a>><br>
Subject: Re: [GRASS-user] Equidistant points along lines of a vector<br>
network<br>
Message-ID:<br>
<CAJDYei=<a href="mailto:crCUSQKKHsans8TLXYEewZemZ5AU_c2HC22N5RL8ELA@mail.gmail.com">crCUSQKKHsans8TLXYEewZemZ5AU_c2HC22N5RL8ELA@mail.gmail.com</a>><br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
Have you tried v.points module?<br>
<br>
2014-09-23 7:39 GMT-05:00 Moritz Lennert <<a href="mailto:mlennert@club.worldonline.be">mlennert@club.worldonline.be</a>>:<br>
<br>
> On 23/09/14 10:23, Johannes Radinger wrote:<br>
><br>
>> Hi,<br>
>><br>
>> I've got a vector network (river network) and I want to place points<br>
>> along that network. The points should be placed every 250 m starting<br>
>> from the outlet. Any network junctions should be ignored so that every<br>
>> point is 250 apart from the next upstream and downstream point.<br>
>><br>
>> With the tool v.segment only the single parts of the polyline (lines<br>
>> between<br>
>> nodes) are splitted based on the distance parameter. So v.segment ignores<br>
>> the network. Maybe v.net.iso can be of use in this case, but here I am<br>
>> missing<br>
>> the option to create points in given distance classes from a starting<br>
>> point.<br>
>><br>
>><br>
>> Is there any specific GRASS tool or procedure for such tasks?<br>
>><br>
><br>
> Would v.build.polylines help here ? I don't know how v.segment acts on<br>
> polylines.<br>
><br>
> Moritz<br>
> _______________________________________________<br>
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><br>
<br>
<br>
<br>
--<br>
*C?sar Augusto Ram?rez Franco*<br>
Laboratorio de Sistemas Complejos Naturales<br>
Escuela de Geociencias<br>
Facultad de Ciencias<br>
Universidad Nacional de Colombia - Sede Medell?n<br>
Tel?fono: <a href="tel:%2857-4%29%20430%209369" value="+15744309369">(57-4) 430 9369</a> - 300 459 6085<br>
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End of grass-user Digest, Vol 101, Issue 34<br>
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</blockquote></div><br><br clear="all"><br>-- <br><div>Pedro Palheiro</div>
</div></div>