Geografic-Information-System/vector/v.split/v.split.html

<h2>DESCRIPTION</h2>

<em>v.split</em> splits vector lines into shorter segments using 
a maximal distance between nodes. The resulting length of all segments
is expected to be equal and not higher than the given <b>length</b> 
parameter.

<h2>EXAMPLES</h2>

The examples are based on the North Carolina sample data location.

<h3>Example 1: Inserting nodes to railroad lines map</h3>

<div class="code"><pre>
# extract one railroad line for this example
v.extract input=railroads output=myrr cats=1

# show line, category, direction (to find the beginning)
g.region vector=myrr
d.erase
d.vect myrr display=shape,cat,dir

# insert nodes at a distance not longer than 1000m
v.split input=myrr output=myrr_split_1km length=1000

d.vect myrr_split_1km display=shape,topo
</pre></div>

<p>
Note: In case that the vector line data are not polylines,
generate first polylines as the second step, eg.:

<div class="code"><pre>
# join segments into polyline
v.build.polylines input=myrr output=myrr_polylines
# regenerate categories
v.category input=myrr_polylines output=myrailroads option=add
</pre></div>

<h3>Example 2: Inserting vertices to railroad lines map</h3>

Note: first run the two steps from example 1.

<div class="code"><pre>
# insert vertices at a distance not longer than 1000m
v.split -n input=myrr output=myrr_split length=1000
d.vect myrr_split display=shape,topo
</pre></div>


<h2>SEE ALSO</h2>

<em>
<a href="v.edit.html">v.edit</a>,
<a href="v.build.polylines.html">v.build.polylines</a>,
<a href="v.to.points.html">v.to.points</a>,
<a href="v.segment.html">v.segment</a>
</em>

<h2>AUTHOR</h2>

Radim Blazek

<p><i>Last changed: $Date$</i>