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

<h2>DESCRIPTION</h2>

<em>v.buffer</em> creates a buffer around features of given <b>type</b>, which
have a category in the given <b>layer</b>. The <b>tolerance</b> controls
the number of vector segments being generated (the smaller the value, the more
vector segments are generated).


<h2>NOTES</h2>

Attributes are not transferred due to potential buffer overlap, which
cannot be resolved automatically.


<h2>EXAMPLES</h2>

<h3>Buffer around input lines</h3>

<div class="code"><pre>
v.buffer input=map output=buffer type=line distance=100
</pre></div>

<h3>Circles around input points</h3>

<div class="code"><pre>
v.buffer input=pointsmap output=circles type=point distance=1000 
</pre></div>

<h3>Non-overlapping circles around input points with attribute transfer</h3>

<div class="code"><pre>
v.buffer input=archsites output=circles type=point distance=200 
# change original points to centroids: 
v.type in=archsites out=archcentroids type=point,centroid 
# patch circles and centroids: 
v.patch in=archcentroids,circles out=circles_db 
# attach attributes, either use 
# db.copy ... 
# or link to the original table: 
v.db.connect map=circles_db table=archsites field=1 key=cat driver=dbf \
database='$GISDBASE/$LOCATION_NAME/$MAPSET/dbf'
</pre></div>


<h2>SEE ALSO</h2>

<em>
<a HREF="r.buffer.html">r.buffer</a>,
<a HREF="v.extract.html">v.extract</a>,
<a HREF="v.type.html">v.type</a>,
<a HREF="v.patch.html">v.patch</a>,
<a HREF="v.db.connect.html">v.db.connect</a>
</em>


<h2>AUTHORS</h2>

Radim Blazek<br>
Rewritten by Rosen Matev (with support through the
 Google Summer of Code program 2008)
<p>
<i>Last changed: $Date: 2008-03-16 16:29:33 +0100 (Sun, 16 Mar 2008) $</i>