ned by OGC.
          </p>
<div class="note"><table border="0" summary="Note">
<tr>
<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../../../../doc/src/images/note.png"></td>
<th align="left">Note</th>
</tr>
<tr><td align="left" valign="top"><p>
              PostGIS contains an algorithm with the same name and the same functionality.
              See the <a href="http://www.postgis.org/docs/ST_Perimeter.html" target="_top">PostGIS
              documentation</a>.
