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<li class="navelem"><a class="el" href="namespacegeos.html">geos</a></li><li class="navelem"><a class="el" href="namespacegeos_1_1precision.html">precision</a></li><li class="navelem"><a class="el" href="classgeos_1_1precision_1_1GeometryPrecisionReducer.html">GeometryPrecisionReducer</a></li> </ul>
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<p>Reduces the precision of a <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> according to the supplied <a class="el" href="classgeos_1_1geom_1_1PrecisionModel.html">geom::PrecisionModel</a>, ensuring that the result is valid (unless specified otherwise).
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<a href="classgeos_1_1precision_1_1GeometryPrecisionReducer.html#details">More...</a></p>
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<p><code>#include <<a class="el" href="GeometryPrecisionReducer_8h_source.html">GeometryPrecisionReducer.h</a>></code></p>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
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Public Member Functions</h2></td></tr>
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<tr class="memitem:afbf0bea4334e3eea5d4635d26d732c10"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1precision_1_1GeometryPrecisionReducer.html#afbf0bea4334e3eea5d4635d26d732c10">GeometryPrecisionReducer</a> (const <a class="el" href="classgeos_1_1geom_1_1PrecisionModel.html">geom::PrecisionModel</a> &pm)</td></tr>
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<tr class="separator:afbf0bea4334e3eea5d4635d26d732c10"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a23eec3922377921a160cbc16e97d89fc"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1precision_1_1GeometryPrecisionReducer.html#a23eec3922377921a160cbc16e97d89fc">GeometryPrecisionReducer</a> (const <a class="el" href="classgeos_1_1geom_1_1GeometryFactory.html">geom::GeometryFactory</a> &changeFactory)</td></tr>
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<tr class="memdesc:a23eec3922377921a160cbc16e97d89fc"><td class="mdescLeft"> </td><td class="mdescRight">Create a reducer that will change the precision model of the new reduced Geometry. <a href="#a23eec3922377921a160cbc16e97d89fc">More...</a><br /></td></tr>
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<tr class="memitem:ad183c4084fd47b52a9a059463b06ec4f"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1precision_1_1GeometryPrecisionReducer.html#ad183c4084fd47b52a9a059463b06ec4f">setRemoveCollapsedComponents</a> (bool remove)</td></tr>
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<tr class="memitem:a49bcfa95700d9b7e309049bdcee25d2c"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1precision_1_1GeometryPrecisionReducer.html#a49bcfa95700d9b7e309049bdcee25d2c">setChangePrecisionModel</a> (bool change)</td></tr>
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<tr class="memdesc:a49bcfa95700d9b7e309049bdcee25d2c"><td class="mdescLeft"> </td><td class="mdescRight">Sets whether the <a class="el" href="classgeos_1_1geom_1_1PrecisionModel.html">geom::PrecisionModel</a> of the new reduced Geometry will be changed to be the <a class="el" href="classgeos_1_1geom_1_1PrecisionModel.html">geom::PrecisionModel</a> supplied to specify the precision reduction. The default is to not change the precision model. <a href="#a49bcfa95700d9b7e309049bdcee25d2c">More...</a><br /></td></tr>
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<tr class="memitem:a2cf5c1580a719fe349b5e0d2c7fd3181"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1precision_1_1GeometryPrecisionReducer.html#a2cf5c1580a719fe349b5e0d2c7fd3181">setUseAreaReducer</a> (bool useAR)</td></tr>
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<tr class="memitem:a443eb455858dbd88d5712cf8ce3a1519"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1precision_1_1GeometryPrecisionReducer.html#a443eb455858dbd88d5712cf8ce3a1519">setPointwise</a> (bool pointwise)</td></tr>
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<tr class="memdesc:a443eb455858dbd88d5712cf8ce3a1519"><td class="mdescLeft"> </td><td class="mdescRight">Sets whether the precision reduction will be done in pointwise fashion only. <a href="#a443eb455858dbd88d5712cf8ce3a1519">More...</a><br /></td></tr>
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<tr class="memitem:a83495222957eecc4c66d870a4c16e707"><td class="memItemLeft" align="right" valign="top">std::unique_ptr< <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1precision_1_1GeometryPrecisionReducer.html#a83495222957eecc4c66d870a4c16e707">reduce</a> (const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> &geom)</td></tr>
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Static Public Member Functions</h2></td></tr>
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<tr class="memitem:aad2456c5ccb843c29cfdec6907e113ab"><td class="memItemLeft" align="right" valign="top">static std::unique_ptr< <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1precision_1_1GeometryPrecisionReducer.html#aad2456c5ccb843c29cfdec6907e113ab">reduce</a> (const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> &g, const <a class="el" href="classgeos_1_1geom_1_1PrecisionModel.html">geom::PrecisionModel</a> &precModel)</td></tr>
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<tr class="memitem:a506dd7e0656b72953848f584f43f78bb"><td class="memItemLeft" align="right" valign="top">static std::unique_ptr< <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1precision_1_1GeometryPrecisionReducer.html#a506dd7e0656b72953848f584f43f78bb">reducePointwise</a> (const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> &g, const <a class="el" href="classgeos_1_1geom_1_1PrecisionModel.html">geom::PrecisionModel</a> &precModel)</td></tr>
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Private Member Functions</h2></td></tr>
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<tr class="memitem:ad602df848cb1194ef65e681041d62303"><td class="memItemLeft" align="right" valign="top">std::unique_ptr< <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1precision_1_1GeometryPrecisionReducer.html#ad602df848cb1194ef65e681041d62303">reducePointwise</a> (const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> &geom)</td></tr>
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<tr class="memitem:afd5440ce2bed88543a93ca8a501fb453"><td class="memItemLeft" align="right" valign="top">std::unique_ptr< <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1precision_1_1GeometryPrecisionReducer.html#afd5440ce2bed88543a93ca8a501fb453">fixPolygonalTopology</a> (const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> &geom)</td></tr>
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<tr class="memitem:a7ebc9c3cfbec19ba15819e9fe8bb8d89"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classgeos_1_1geom_1_1GeometryFactory.html#a4acdc96c586d8e67bad393abae76220b">geom::GeometryFactory::Ptr</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1precision_1_1GeometryPrecisionReducer.html#a7ebc9c3cfbec19ba15819e9fe8bb8d89">createFactory</a> (const <a class="el" href="classgeos_1_1geom_1_1GeometryFactory.html">geom::GeometryFactory</a> &oldGF, const <a class="el" href="classgeos_1_1geom_1_1PrecisionModel.html">geom::PrecisionModel</a> &newPM)</td></tr>
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<tr class="memitem:a185e7abc38206c3f33e6383352daf50a"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1precision_1_1GeometryPrecisionReducer.html#a185e7abc38206c3f33e6383352daf50a">GeometryPrecisionReducer</a> (<a class="el" href="classgeos_1_1precision_1_1GeometryPrecisionReducer.html">GeometryPrecisionReducer</a> const &)</td></tr>
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<tr class="memitem:a2b42bbb4ddedf952ddfebe07b7709e1d"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classgeos_1_1precision_1_1GeometryPrecisionReducer.html">GeometryPrecisionReducer</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1precision_1_1GeometryPrecisionReducer.html#a2b42bbb4ddedf952ddfebe07b7709e1d">operator=</a> (<a class="el" href="classgeos_1_1precision_1_1GeometryPrecisionReducer.html">GeometryPrecisionReducer</a> const &)</td></tr>
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Private Attributes</h2></td></tr>
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<tr class="memitem:a63483fdb4fb194a3e5444380b67a3f34"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="classgeos_1_1geom_1_1GeometryFactory.html">geom::GeometryFactory</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1precision_1_1GeometryPrecisionReducer.html#a63483fdb4fb194a3e5444380b67a3f34">newFactory</a></td></tr>
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<tr class="memitem:a642cf48860cabc54e243c7377cc9c17d"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="classgeos_1_1geom_1_1PrecisionModel.html">geom::PrecisionModel</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1precision_1_1GeometryPrecisionReducer.html#a642cf48860cabc54e243c7377cc9c17d">targetPM</a></td></tr>
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<tr class="memitem:a326f1c55b893749c053fa4855cc99c59"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1precision_1_1GeometryPrecisionReducer.html#a326f1c55b893749c053fa4855cc99c59">removeCollapsed</a></td></tr>
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<tr class="memitem:a0b5e2cb08053b6b13dd7e7f3b54fc843"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1precision_1_1GeometryPrecisionReducer.html#a0b5e2cb08053b6b13dd7e7f3b54fc843">changePrecisionModel</a></td></tr>
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<tr class="memitem:a1e1515c812154e869f1b1b5b8f898e3b"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1precision_1_1GeometryPrecisionReducer.html#a1e1515c812154e869f1b1b5b8f898e3b">useAreaReducer</a></td></tr>
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<tr class="memitem:a7d3631630a419ed01af01d34002f2297"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1precision_1_1GeometryPrecisionReducer.html#a7d3631630a419ed01af01d34002f2297">isPointwise</a></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
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<div class="textblock"><p>Reduces the precision of a <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> according to the supplied <a class="el" href="classgeos_1_1geom_1_1PrecisionModel.html">geom::PrecisionModel</a>, ensuring that the result is valid (unless specified otherwise). </p>
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<p>By default the reduced result is topologically valid To ensure this a polygonal geometry is reduced in a topologically valid fashion (technically, by using snap-rounding). It can be forced to be reduced pointwise by using setPointwise(boolean). Note that in this case the result geometry may be invalid. Linear and point geometry is always reduced pointwise (i.e. without further change to its topology or stucture), since this does not change validity.</p>
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<p>By default the geometry precision model is not changed. This can be overridden by usingsetChangePrecisionModel(boolean).</p>
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<p>Normally collapsed components (e.g. lines collapsing to a point) are not included in the result. This behavior can be changed by using setRemoveCollapsedComponents(boolean). </p>
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<p>Definition at line <a class="el" href="GeometryPrecisionReducer_8h_source.html#l00058">58</a> of file <a class="el" href="GeometryPrecisionReducer_8h_source.html">GeometryPrecisionReducer.h</a>.</p>
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</div><h2 class="groupheader">Constructor & Destructor Documentation</h2>
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<td class="paramtype"><a class="el" href="classgeos_1_1precision_1_1GeometryPrecisionReducer.html">GeometryPrecisionReducer</a> const & </td>
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<td class="paramtype">const <a class="el" href="classgeos_1_1geom_1_1PrecisionModel.html">geom::PrecisionModel</a> & </td>
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<p>Definition at line <a class="el" href="GeometryPrecisionReducer_8h_source.html#l00126">126</a> of file <a class="el" href="GeometryPrecisionReducer_8h_source.html">GeometryPrecisionReducer.h</a>.</p>
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<td>(</td>
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<td class="paramtype">const <a class="el" href="classgeos_1_1geom_1_1GeometryFactory.html">geom::GeometryFactory</a> & </td>
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<p>Create a reducer that will change the precision model of the new reduced Geometry. </p>
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<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">changeFactory</td><td>the factory for the created Geometry. Its PrecisionModel will be used for the reduction. NOTE: ownership left to caller must be kept alive for the whole lifetime of the returned Geometry. </td></tr>
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<p>Definition at line <a class="el" href="GeometryPrecisionReducer_8h_source.html#l00145">145</a> of file <a class="el" href="GeometryPrecisionReducer_8h_source.html">GeometryPrecisionReducer.h</a>.</p>
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<h2 class="groupheader">Member Function Documentation</h2>
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<td class="memname"><a class="el" href="classgeos_1_1geom_1_1GeometryFactory.html#a4acdc96c586d8e67bad393abae76220b">geom::GeometryFactory::Ptr</a> geos::precision::GeometryPrecisionReducer::createFactory </td>
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<td class="memname">std::unique_ptr<<a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a>> geos::precision::GeometryPrecisionReducer::fixPolygonalTopology </td>
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<td class="memname"><a class="el" href="classgeos_1_1precision_1_1GeometryPrecisionReducer.html">GeometryPrecisionReducer</a>& geos::precision::GeometryPrecisionReducer::operator= </td>
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<td class="memname">static std::unique_ptr<<a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a>> geos::precision::GeometryPrecisionReducer::reduce </td>
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<p>Convenience method for doing precision reduction on a single geometry, with collapses removed and keeping the geometry precision model the same, and preserving polygonal topology.</p>
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<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">g</td><td>the geometry to reduce </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>the reduced geometry </dd></dl>
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<p>Definition at line <a class="el" href="GeometryPrecisionReducer_8h_source.html#l00097">97</a> of file <a class="el" href="GeometryPrecisionReducer_8h_source.html">GeometryPrecisionReducer.h</a>.</p>
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<p>References <a class="el" href="GeometryPrecisionReducer_8h_source.html#l00097">reduce()</a>.</p>
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<p>Referenced by <a class="el" href="GeometryPrecisionReducer_8h_source.html#l00097">reduce()</a>, and <a class="el" href="GeometryPrecisionReducer_8h_source.html#l00117">reducePointwise()</a>.</p>
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<td class="memname">std::unique_ptr<<a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a>> geos::precision::GeometryPrecisionReducer::reduce </td>
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<td class="memname">std::unique_ptr<<a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a>> geos::precision::GeometryPrecisionReducer::reducePointwise </td>
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<td class="memname">static std::unique_ptr<<a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a>> geos::precision::GeometryPrecisionReducer::reducePointwise </td>
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<p>Convenience method for doing precision reduction on a single geometry, with collapses removed and keeping the geometry precision model the same, but NOT preserving valid polygonal topology.</p>
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<dl class="section return"><dt>Returns</dt><dd>the reduced geometry </dd></dl>
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<p>Definition at line <a class="el" href="GeometryPrecisionReducer_8h_source.html#l00117">117</a> of file <a class="el" href="GeometryPrecisionReducer_8h_source.html">GeometryPrecisionReducer.h</a>.</p>
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<p>References <a class="el" href="GeometryPrecisionReducer_8h_source.html#l00097">reduce()</a>, and <a class="el" href="GeometryPrecisionReducer_8h_source.html#l00201">setPointwise()</a>.</p>
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<td class="memname">void geos::precision::GeometryPrecisionReducer::setChangePrecisionModel </td>
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<p>Sets whether the <a class="el" href="classgeos_1_1geom_1_1PrecisionModel.html">geom::PrecisionModel</a> of the new reduced Geometry will be changed to be the <a class="el" href="classgeos_1_1geom_1_1PrecisionModel.html">geom::PrecisionModel</a> supplied to specify the precision reduction. The default is to not change the precision model. </p>
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<p>Definition at line <a class="el" href="GeometryPrecisionReducer_8h_source.html#l00178">178</a> of file <a class="el" href="GeometryPrecisionReducer_8h_source.html">GeometryPrecisionReducer.h</a>.</p>
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<td class="memname">void geos::precision::GeometryPrecisionReducer::setPointwise </td>
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<p>Sets whether the precision reduction will be done in pointwise fashion only. </p>
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<p>Pointwise precision reduction reduces the precision of the individual coordinates only, but does not attempt to recreate valid topology. This is only relevant for geometries containing polygonal components.</p>
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<p>Definition at line <a class="el" href="GeometryPrecisionReducer_8h_source.html#l00201">201</a> of file <a class="el" href="GeometryPrecisionReducer_8h_source.html">GeometryPrecisionReducer.h</a>.</p>
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<p>Referenced by <a class="el" href="GeometryPrecisionReducer_8h_source.html#l00117">reducePointwise()</a>.</p>
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<td class="memname">void geos::precision::GeometryPrecisionReducer::setRemoveCollapsedComponents </td>
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<p>Sets whether the reduction will result in collapsed components being removed completely, or simply being collapsed to an (invalid) Geometry of the same type.</p>
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<p>Definition at line <a class="el" href="GeometryPrecisionReducer_8h_source.html#l00162">162</a> of file <a class="el" href="GeometryPrecisionReducer_8h_source.html">GeometryPrecisionReducer.h</a>.</p>
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<td class="memname">void geos::precision::GeometryPrecisionReducer::setUseAreaReducer </td>
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<td>(</td>
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<p>Definition at line <a class="el" href="GeometryPrecisionReducer_8h_source.html#l00184">184</a> of file <a class="el" href="GeometryPrecisionReducer_8h_source.html">GeometryPrecisionReducer.h</a>.</p>
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<h2 class="groupheader">Member Data Documentation</h2>
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<p>Definition at line <a class="el" href="GeometryPrecisionReducer_8h_source.html#l00068">68</a> of file <a class="el" href="GeometryPrecisionReducer_8h_source.html">GeometryPrecisionReducer.h</a>.</p>
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<p>Definition at line <a class="el" href="GeometryPrecisionReducer_8h_source.html#l00070">70</a> of file <a class="el" href="GeometryPrecisionReducer_8h_source.html">GeometryPrecisionReducer.h</a>.</p>
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<td class="memname">const <a class="el" href="classgeos_1_1geom_1_1GeometryFactory.html">geom::GeometryFactory</a>* geos::precision::GeometryPrecisionReducer::newFactory</td>
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<p>Definition at line <a class="el" href="GeometryPrecisionReducer_8h_source.html#l00063">63</a> of file <a class="el" href="GeometryPrecisionReducer_8h_source.html">GeometryPrecisionReducer.h</a>.</p>
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<p>Definition at line <a class="el" href="GeometryPrecisionReducer_8h_source.html#l00067">67</a> of file <a class="el" href="GeometryPrecisionReducer_8h_source.html">GeometryPrecisionReducer.h</a>.</p>
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<td class="memname">const <a class="el" href="classgeos_1_1geom_1_1PrecisionModel.html">geom::PrecisionModel</a>& geos::precision::GeometryPrecisionReducer::targetPM</td>
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<p>Definition at line <a class="el" href="GeometryPrecisionReducer_8h_source.html#l00065">65</a> of file <a class="el" href="GeometryPrecisionReducer_8h_source.html">GeometryPrecisionReducer.h</a>.</p>
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<p>Definition at line <a class="el" href="GeometryPrecisionReducer_8h_source.html#l00069">69</a> of file <a class="el" href="GeometryPrecisionReducer_8h_source.html">GeometryPrecisionReducer.h</a>.</p>
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<hr/>The documentation for this class was generated from the following file:<ul>
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<li><a class="el" href="GeometryPrecisionReducer_8h_source.html">GeometryPrecisionReducer.h</a></li>
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