ces:</B> <DD><A HREF="../../../../../com/vividsolutions/jts/index/SpatialIndex.html" title="interface in com.vividsolutions.jts.index">SpatialIndex</A>, java.io.Serializable</DD>
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<DT><PRE>public class <B>Quadtree</B><DT>extends java.lang.Object<DT>implements <A HREF="../../../../../com/vividsolutions/jts/index/SpatialIndex.html" title="interface in com.vividsolutions.jts.index">SpatialIndex</A>, java.io.Serializable</DL>
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A Quadtree is a spatial index structure for efficie