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<H1>quadtree</H1>
<P>
(data structure)

<P>
<strong>Definition:</strong>
A <a href="tree.html" tppabs="http://hissa.nist.gov/dads/HTML/tree.html"><em>tree</em></a> where each <a href="node.html" tppabs="http://hissa.nist.gov/dads/HTML/node.html"><em>node</em></a> is split along all <em>d</em> dimensions, leading to 2<sup>d</sup> <a href="child.html" tppabs="http://hissa.nist.gov/dads/HTML/child.html"><em>children</em></a>.
<P><strong>See also</strong>
<a href="octtree.html" tppabs="http://hissa.nist.gov/dads/HTML/octtree.html"><em>octtree</em></a>, <a href="quadtreecplx.html" tppabs="http://hissa.nist.gov/dads/HTML/quadtreecplx.html"><em>quadtree complexity theorem</em></a>, <a href="linearquadtr.html" tppabs="http://hissa.nist.gov/dads/HTML/linearquadtr.html"><em>linear quadtree</em></a>.
<P><em>Note:
It was originally designed for 2-dimensional data (pictures), so each node had four children, hence <em>quad</em>tree.  After [1].</em>
<P>Author: <a href="terms.html#authorPEB" tppabs="http://hissa.nist.gov/dads/terms.html#authorPEB">PEB</a>
<H2>Implementation</H2>
<A HREF="javascript:if(confirm('http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://lcavwww.epfl.ch/%7Ebalmelli/software/quadtree/  \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address.  \n\nDo you want to open it from the server?'))window.location='http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://lcavwww.epfl.ch/%7Ebalmelli/software/quadtree/'" tppabs="http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://lcavwww.epfl.ch/%7Ebalmelli/software/quadtree/">Spatial Linear Quadtree with Constant Time Node Traversal (C++)</A> including man pages, examples, etc., <A HREF="javascript:if(confirm('http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://www.dcc.uchile.cl/%7Eoalonso/handbook/algs/3/351.ins.c.html  \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address.  \n\nDo you want to open it from the server?'))window.location='http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://www.dcc.uchile.cl/%7Eoalonso/handbook/algs/3/351.ins.c.html'" tppabs="http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://www.dcc.uchile.cl/%7Eoalonso/handbook/algs/3/351.ins.c.html">insert (C)</a>, <A HREF="javascript:if(confirm('http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://www.dcc.uchile.cl/%7Eoalonso/handbook/algs/3/351.srch.c.html  \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address.  \n\nDo you want to open it from the server?'))window.location='http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://www.dcc.uchile.cl/%7Eoalonso/handbook/algs/3/351.srch.c.html'" tppabs="http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://www.dcc.uchile.cl/%7Eoalonso/handbook/algs/3/351.srch.c.html">search (C)</A>, <A HREF="javascript:if(confirm('http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://rvl.www.ecn.purdue.edu/RVL/student-software/ee661.97/cetto/quad/quad.c  \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address.  \n\nDo you want to open it from the server?'))window.location='http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://rvl.www.ecn.purdue.edu/RVL/student-software/ee661.97/cetto/quad/quad.c'" tppabs="http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://rvl.www.ecn.purdue.edu/RVL/student-software/ee661.97/cetto/quad/quad.c">for an image (C)</A>, <A HREF="javascript:if(confirm('http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://askdonna.ask.uni-karlsruhe.de/hppd/hpux/X11/Graphics/quadtree-1.0/  \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address.  \n\nDo you want to open it from the server?'))window.location='http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://askdonna.ask.uni-karlsruhe.de/hppd/hpux/X11/Graphics/quadtree-1.0/'" tppabs="http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://askdonna.ask.uni-karlsruhe.de/hppd/hpux/X11/Graphics/quadtree-1.0/">bitmap utilities (C)</A>.
<H2>More information</H2>
<A HREF="javascript:if(confirm('http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://www.icsi.berkeley.edu/cs267/lecture26/lecture26.html  \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address.  \n\nDo you want to open it from the server?'))window.location='http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://www.icsi.berkeley.edu/cs267/lecture26/lecture26.html'" tppabs="http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://www.icsi.berkeley.edu/cs267/lecture26/lecture26.html">Quadtrees and Octtrees</A>, <A HREF="javascript:if(confirm('http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://lcavwww.epfl.ch/%7Ebalmelli/publications.html  \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address.  \n\nDo you want to open it from the server?'))window.location='http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://lcavwww.epfl.ch/%7Ebalmelli/publications.html'" tppabs="http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://lcavwww.epfl.ch/%7Ebalmelli/publications.html">Quadtree ...</A>

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Entry modified Mon Jan 10 09:27:45 2000.<BR>
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