Hi, wittich.<br><br>-- firstly you should delete old categories from your segments' lines (<span id="result_box" class="short_text" lang="en"><span class="hps">they relate </span></span><span id="result_box" class="short_text" lang="en"><span class="hps">to the initial</span></span><span id="result_box" class="short_text" lang="en"><span class="hps"> 3 lines)</span></span>:<br>
v.category in=lines_split out=lines_split_nocats opt=del<br><br>-- then add new cats to segmented lines:<br>v.category in=lines_split_nocats out=lines_split_newcats opt=add<br><br><br><u>As a promotion</u>: there is a small shell-script <<a href="http://grass.osgeo.org/wiki/Addons#v.to.equidist">v.to.equidist</a>> on GRASS-Addons page that generates vector points or line segments along a given vector line(s) with the equal distances (uses v.segment) and populate tables with cats, length etc.<br>
<br><br><br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Date: Sun, 23 Oct 2011 10:26:06 -0700 (PDT)<br>
From: wittich <<a href="mailto:vwittich@gmail.com" target="_blank">vwittich@gmail.com</a>><br>
Subject: [GRASS-user] Add DB entries to vector line (after v.split)<br>
To: <a href="mailto:grass-user@lists.osgeo.org" target="_blank">grass-user@lists.osgeo.org</a><br>
Message-ID: <<a href="mailto:1319390766722-6922423.post@n2.nabble.com" target="_blank">1319390766722-6922423.post@n2.nabble.com</a>><br>
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<br>
Hi there,<br>
<br>
I try to find a way to give every line segment in my vector file a db entry.<br>
I've create 3 lines and split them into 50m segments. Now I want to do<br>
several calculations with it. Therefore I need for each segment a row in the<br>
db.<br>
<br>
*How can I create a entry for each segment?*<br>
<br>
> <a href="http://v.info" target="_blank">v.info</a> split_lines<br>
> Number of lines: 598<br>
<br>
> v.db.select split_lines<br>
> cat<br>
> 1<br>
> 2<br>
> 3<br>
<br>
I would appreciate if someone can explain me what I do wrong, I tried<br>
already everything I could found without success (eg. v.dissolve,<br>
v.category, v.centroids, and others)<br>
<br>
regards Valentin<br>
<br>
--<br>
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Sent from the Grass - Users mailing list archive at Nabble.com.<br><br>
</blockquote></div>