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684 lines
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<div class="title">geos::operation::overlayng::ElevationModel Class Reference</div> </div>
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<p>A simple elevation model used to populate missing Z values in overlay results.
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<a href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel.html#details">More...</a></p>
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<p><code>#include <<a class="el" href="ElevationModel_8h_source.html">ElevationModel.h</a>></code></p>
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Classes</h2></td></tr>
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<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">class  </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel_1_1ElevationCell.html">ElevationCell</a></td></tr>
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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:a7349bcc333f12a105b98b1bf224aa785"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel.html#a7349bcc333f12a105b98b1bf224aa785">ElevationModel</a> (const <a class="el" href="classgeos_1_1geom_1_1Envelope.html">geom::Envelope</a> &<a class="el" href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel.html#adaa8aa65c560400e6c47b0792c8059fe">extent</a>, int <a class="el" href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel.html#acc61195bf3677bc6d7e898b7939c85a5">numCellX</a>, int <a class="el" href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel.html#a1f0c877e77b8348c31a7ea23bbdeb2ca">numCellY</a>)</td></tr>
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<tr class="separator:a7349bcc333f12a105b98b1bf224aa785"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ae2b7e77f070cccbda4c3b7072510da07"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel.html#ae2b7e77f070cccbda4c3b7072510da07">add</a> (const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> &geom)</td></tr>
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<tr class="separator:ae2b7e77f070cccbda4c3b7072510da07"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a88248ded2b91b4eae4bed84f2a7808b4"><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel.html#a88248ded2b91b4eae4bed84f2a7808b4">getZ</a> (double x, double y)</td></tr>
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<tr class="separator:a88248ded2b91b4eae4bed84f2a7808b4"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:afc5f92305ca043853d14315db6576cdf"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel.html#afc5f92305ca043853d14315db6576cdf">populateZ</a> (<a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> &geom)</td></tr>
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<tr class="memdesc:afc5f92305ca043853d14315db6576cdf"><td class="mdescLeft"> </td><td class="mdescRight">Computes Z values for any missing Z values in a geometry, using the computed model. <a href="#afc5f92305ca043853d14315db6576cdf">More...</a><br /></td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-static-methods"></a>
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Static Public Member Functions</h2></td></tr>
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<tr class="memitem:aca46235d39865760dd3e4df543724db8"><td class="memItemLeft" align="right" valign="top">static std::unique_ptr< <a class="el" href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel.html">ElevationModel</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel.html#aca46235d39865760dd3e4df543724db8">create</a> (const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> &geom1, const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> &geom2)</td></tr>
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<tr class="memitem:a9fc04b458b82cedda44c1948748620d2"><td class="memItemLeft" align="right" valign="top">static std::unique_ptr< <a class="el" href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel.html">ElevationModel</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel.html#a9fc04b458b82cedda44c1948748620d2">create</a> (const <a class="el" href="classgeos_1_1geom_1_1Geometry.html">geom::Geometry</a> &geom1)</td></tr>
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Protected Member Functions</h2></td></tr>
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<tr class="memitem:a13b1460f109d60a7458f518144f22677"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel.html#a13b1460f109d60a7458f518144f22677">add</a> (double x, double y, double z)</td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pri-methods"></a>
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Private Member Functions</h2></td></tr>
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<tr class="memitem:a25501f6b6a60f50121cf52e1dbde8901"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel.html#a25501f6b6a60f50121cf52e1dbde8901">init</a> ()</td></tr>
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<tr class="memitem:a1d58ae037e10b9c2cb78dabb776b8dbe"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel_1_1ElevationCell.html">ElevationCell</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel.html#a1d58ae037e10b9c2cb78dabb776b8dbe">getCell</a> (double x, double y)</td></tr>
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<tr class="memitem:ab4015eac8e24d75dca9ba6b7cb6e5690"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel.html#ab4015eac8e24d75dca9ba6b7cb6e5690">getCellOffset</a> (int ix, int iy)</td></tr>
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</table><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pri-attribs"></a>
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Private Attributes</h2></td></tr>
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<tr class="memitem:adaa8aa65c560400e6c47b0792c8059fe"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classgeos_1_1geom_1_1Envelope.html">geom::Envelope</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel.html#adaa8aa65c560400e6c47b0792c8059fe">extent</a></td></tr>
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<tr class="memitem:acc61195bf3677bc6d7e898b7939c85a5"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel.html#acc61195bf3677bc6d7e898b7939c85a5">numCellX</a></td></tr>
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<tr class="separator:acc61195bf3677bc6d7e898b7939c85a5"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a1f0c877e77b8348c31a7ea23bbdeb2ca"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel.html#a1f0c877e77b8348c31a7ea23bbdeb2ca">numCellY</a></td></tr>
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<tr class="separator:a1f0c877e77b8348c31a7ea23bbdeb2ca"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:aac8939f71e827249a87dda7284f59085"><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel.html#aac8939f71e827249a87dda7284f59085">cellSizeX</a></td></tr>
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<tr class="memitem:a4019544c4dee93b411fcf2ef1fed177c"><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel.html#a4019544c4dee93b411fcf2ef1fed177c">cellSizeY</a></td></tr>
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<tr class="separator:a4019544c4dee93b411fcf2ef1fed177c"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a1f8aa2181d9fbfbb3bfa5eb0e3f942f5"><td class="memItemLeft" align="right" valign="top">std::vector< <a class="el" href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel_1_1ElevationCell.html">ElevationCell</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel.html#a1f8aa2181d9fbfbb3bfa5eb0e3f942f5">cells</a></td></tr>
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<tr class="separator:a1f8aa2181d9fbfbb3bfa5eb0e3f942f5"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:aa2c80544c62676139690d20668b50d20"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel.html#aa2c80544c62676139690d20668b50d20">isInitialized</a> = false</td></tr>
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<tr class="memitem:addca5a13639c1f9dac7f10da19df1a2b"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel.html#addca5a13639c1f9dac7f10da19df1a2b">hasZValue</a> = false</td></tr>
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<tr class="memitem:ae1ca4fda66a623f1975700246272d7e7"><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel.html#ae1ca4fda66a623f1975700246272d7e7">averageZ</a> = <a class="el" href="namespacegeos.html#a3207604faf2271d877e558c0c7fd2dcc">DoubleNotANumber</a></td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pri-static-attribs"></a>
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Static Private Attributes</h2></td></tr>
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<tr class="memitem:ad32bf8f2922d51b945ec522d44a89b5f"><td class="memItemLeft" align="right" valign="top">static const int </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel.html#ad32bf8f2922d51b945ec522d44a89b5f">DEFAULT_CELL_NUM</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>A simple elevation model used to populate missing Z values in overlay results. </p>
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<p>The model divides the extent of the input geometry(s) into an NxM grid. The default grid size is 3x3. If the input has no extent in the X or Y dimension, that dimension is given grid size 1. The elevation of each grid cell is computed as the average of the Z values of the input vertices in that cell (if any). If a cell has no input vertices within it, it is assigned the average elevation over all cells.</p>
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<p>If no input vertices have Z values, the model does not assign a Z value.</p>
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<p>The elevation of an arbitrary location is determined as the Z value of the nearest grid cell.</p>
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<p>An elevation model can be used to populate missing Z values in an overlay result geometry.</p>
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<dl class="section author"><dt>Author</dt><dd>Martin Davis </dd></dl>
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<p>Definition at line <a class="el" href="ElevationModel_8h_source.html#l00065">65</a> of file <a class="el" href="ElevationModel_8h_source.html">ElevationModel.h</a>.</p>
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</div><h2 class="groupheader">Constructor & Destructor Documentation</h2>
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<a class="anchor" id="a7349bcc333f12a105b98b1bf224aa785"></a>
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<td class="memname">geos::operation::overlayng::ElevationModel::ElevationModel </td>
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<td>(</td>
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<td class="paramtype">const <a class="el" href="classgeos_1_1geom_1_1Envelope.html">geom::Envelope</a> & </td>
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<td class="paramname"><em>extent</em>, </td>
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<td class="paramtype">int </td>
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<td class="paramname"><em>numCellX</em>, </td>
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<td class="paramtype">int </td>
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<td>)</td>
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<h2 class="groupheader">Member Function Documentation</h2>
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<td class="memname">void geos::operation::overlayng::ElevationModel::add </td>
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<td>(</td>
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<td class="paramtype">double </td>
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<td class="memname">void geos::operation::overlayng::ElevationModel::add </td>
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<p>Definition at line <a class="el" href="ElevationModel_8h_source.html#l00118">118</a> of file <a class="el" href="ElevationModel_8h_source.html">ElevationModel.h</a>.</p>
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<p>Gets the model Z value at a given location. If the location lies outside the model grid extent, this returns the Z value of the nearest grid cell. If the model has no elevation computed (i.e. due to empty input), the value is returned as a double NaN.</p>
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<dl class="section return"><dt>Returns</dt><dd>the computed model Z value </dd></dl>
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<p>Computes Z values for any missing Z values in a geometry, using the computed model. </p>
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<p>If the model has no Z value, or the geometry coordinate dimension does not include Z, no action is taken.</p>
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<dl class="params"><dt>Parameters</dt><dd>
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<h2 class="groupheader">Member Data Documentation</h2>
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<td class="memname">double geos::operation::overlayng::ElevationModel::averageZ = <a class="el" href="namespacegeos.html#a3207604faf2271d877e558c0c7fd2dcc">DoubleNotANumber</a></td>
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<p>Definition at line <a class="el" href="ElevationModel_8h_source.html#l00112">112</a> of file <a class="el" href="ElevationModel_8h_source.html">ElevationModel.h</a>.</p>
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<td class="memname">std::vector<<a class="el" href="classgeos_1_1operation_1_1overlayng_1_1ElevationModel_1_1ElevationCell.html">ElevationCell</a>> geos::operation::overlayng::ElevationModel::cells</td>
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<p>Definition at line <a class="el" href="ElevationModel_8h_source.html#l00109">109</a> of file <a class="el" href="ElevationModel_8h_source.html">ElevationModel.h</a>.</p>
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<p>Definition at line <a class="el" href="ElevationModel_8h_source.html#l00107">107</a> of file <a class="el" href="ElevationModel_8h_source.html">ElevationModel.h</a>.</p>
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<p>Definition at line <a class="el" href="ElevationModel_8h_source.html#l00108">108</a> of file <a class="el" href="ElevationModel_8h_source.html">ElevationModel.h</a>.</p>
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<p>Definition at line <a class="el" href="ElevationModel_8h_source.html#l00103">103</a> of file <a class="el" href="ElevationModel_8h_source.html">ElevationModel.h</a>.</p>
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<td class="memname"><a class="el" href="classgeos_1_1geom_1_1Envelope.html">geom::Envelope</a> geos::operation::overlayng::ElevationModel::extent</td>
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<p>Definition at line <a class="el" href="ElevationModel_8h_source.html#l00104">104</a> of file <a class="el" href="ElevationModel_8h_source.html">ElevationModel.h</a>.</p>
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<p>Definition at line <a class="el" href="ElevationModel_8h_source.html#l00111">111</a> of file <a class="el" href="ElevationModel_8h_source.html">ElevationModel.h</a>.</p>
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<p>Definition at line <a class="el" href="ElevationModel_8h_source.html#l00110">110</a> of file <a class="el" href="ElevationModel_8h_source.html">ElevationModel.h</a>.</p>
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<p>Definition at line <a class="el" href="ElevationModel_8h_source.html#l00105">105</a> of file <a class="el" href="ElevationModel_8h_source.html">ElevationModel.h</a>.</p>
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<td class="memname">int geos::operation::overlayng::ElevationModel::numCellY</td>
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<p>Definition at line <a class="el" href="ElevationModel_8h_source.html#l00106">106</a> of file <a class="el" href="ElevationModel_8h_source.html">ElevationModel.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="ElevationModel_8h_source.html">ElevationModel.h</a></li>
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