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[/============================================================================
Boost.Geometry (aka GGL, Generic Geometry Library)
Copyright (c) 2009-2014 Barend Gehrels, Amsterdam, the Netherlands.
Copyright (c) 2009-2014 Mateusz Loskot, London, UK.
Copyright (c) 2009-2014 Bruno Lalande, Paris, France.
This file was modified by Oracle on 2014.
Modifications copyright (c) 2014, Oracle and/or its affiliates.
Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
Use, modification and distribution is subject to the Boost Software License,
Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
http://www.boost.org/LICENSE_1_0.txt)
=============================================================================/]
[def __this_function__ union]
[heading_conformance_ogc __this_function__..Union]
[note __boost_geometry__ adds an underscore to avoid using the `union` keyword]
[heading Behavior]
[table
[[Case] [Behavior] ]
[[[qbk_out __point__]][Calculates union linestrings of input (multi)points]]
[[[qbk_out __linestring__]][Calculates union linestrings of input (multi)linestrings]]
[[[qbk_out __polygon__]][Calculates union polygons of input (multi)polygons and/or boxes]]
]
[include reference/algorithms/geometry_rules.qbk]
[heading Example]
[union]
[union_output]
[heading See also]
* [link geometry.reference.algorithms.intersection intersection]
* [link geometry.reference.algorithms.difference difference]
* [link geometry.reference.algorithms.sym_difference sym_difference (symmetric difference)]
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