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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="geometry.introduction"></a><a class="link" href="introduction.html" title="Introduction">Introduction</a>
</h2></div></div></div>
<p>
Boost.Geometry (aka Generic Geometry Library, GGL), part of collection of the
Boost C++ Libraries, defines concepts, primitives and algorithms for solving
geometry problems.
</p>
<p>
Boost.Geometry contains a dimension-agnostic, coordinate-system-agnostic and
scalable kernel, based on concepts, meta-functions and tag dispatching. On
top of that kernel, algorithms are built: area, length, perimeter, centroid,
convex hull, intersection (clipping), within (point in polygon), distance,
envelope (bounding box), simplify, transform, and much more. The library supports
high precision arithmetic numbers, such as <a href="http://www.ttmath.org/" target="_top">ttmath</a>.
</p>
<p>
Boost.Geometry contains instantiable geometry classes, but library users can
also use their own. Using registration macros or traits classes their geometries
can be adapted to fulfil Boost.Geometry concepts.
</p>
<p>
Boost.Geometry might be used in all domains where geometry plays a role: mapping
and GIS, game development, computer graphics and widgets, robotics, astronomy
and more. The core is designed to be as generic as possible and support those
domains. For now, the development has been mostly GIS-oriented.
</p>
<p>
The library follows existing conventions:
</p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
conventions from boost
</li>
<li class="listitem">
conventions from the std library
</li>
<li class="listitem">
conventions and names from one of the <a href="http://www.opengeospatial.org" target="_top">OGC</a>
standards on geometry and, more specificly, from the <a href="http://www.opengeospatial.org/standards/sfa" target="_top">OGC
Simple Feature Specification</a>
</li>
</ul></div>
<p>
The library was first released with Boost 1.47.0 and from that point on it
is officially part of the Boost C++ Libraries.
</p>
<p>
Latest stable version of the source code is included in the <a href="http://www.boost.org/users/download/" target="_top">Boost
packaged releases</a>. It can also be downloaded from the current <a href="http://svn.boost.org/svn/boost/branches/release" target="_top">Boost release branch</a>
in the Boost Subversion repository.
</p>
<p>
The library development upstream is available from the <a href="http://svn.boost.org/svn/boost/trunk" target="_top">Boost
trunk</a> in the Boost Subversion repository.
</p>
<p>
Note that the library <span class="bold"><strong>extensions</strong></span> are not distributed
in the official Boost releases, but only available in the <a href="http://svn.boost.org/svn/boost/trunk/boost/geometry/extensions/" target="_top">Boost
trunk</a> and that they are subject to change.
</p>
<p>
Boost.Geometry was accepted by Boost at November 28, 2009 (<a href="http://permalink.gmane.org/gmane.comp.lib.boost.announce/246" target="_top">review
report</a>).
</p>
<p>
There is a Boost.Geometry <a href="http://lists.boost.org/mailman/listinfo.cgi/geometry" target="_top">mailing
list</a>. The mailing list and its messages are also accessible from <a href="http://boost-geometry.203548.n3.nabble.com/" target="_top">Nabble</a> as Boost Geometry.
Also on the Boost Developers list and on the Boost Users list Boost.Geometry
is discussed.
</p>
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<td align="right"><div class="copyright-footer">Copyright © 2009-2012 Barend
Gehrels, Bruno Lalande, Mateusz Loskot<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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