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  26 <div class="titlepage"><div><div><h5 class="title">
  27 <a name="geometry.reference.algorithms.discrete_hausdorff_distance.discrete_hausdorff_distance_3_with_strategy"></a><a class="link" href="discrete_hausdorff_distance_3_with_strategy.html" title="discrete_hausdorff_distance (with strategy)">discrete_hausdorff_distance
  28           (with strategy)</a>
  29 </h5></div></div></div>
  30 <p>
  31             <a class="indexterm" name="idm46187002818064"></a>
  32 Calculate discrete Hausdorff distance between two geometries (currently
  33             works for LineString-LineString, MultiPoint-MultiPoint, Point-MultiPoint,
  34             MultiLineString-MultiLineString) using specified strategy.
  35           </p>
  36 <h6>
  37 <a name="geometry.reference.algorithms.discrete_hausdorff_distance.discrete_hausdorff_distance_3_with_strategy.h0"></a>
  38             <span class="phrase"><a name="geometry.reference.algorithms.discrete_hausdorff_distance.discrete_hausdorff_distance_3_with_strategy.synopsis"></a></span><a class="link" href="discrete_hausdorff_distance_3_with_strategy.html#geometry.reference.algorithms.discrete_hausdorff_distance.discrete_hausdorff_distance_3_with_strategy.synopsis">Synopsis</a>
  39           </h6>
  40 <p>
  41 </p>
  42 <pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Geometry1</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Geometry2</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Strategy</span><span class="special">&gt;</span>
  43 <span class="identifier">distance_result</span><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="identifier">point_type</span><span class="special">&lt;</span><span class="identifier">Geometry1</span><span class="special">&gt;::</span><span class="identifier">type</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">point_type</span><span class="special">&lt;</span><span class="identifier">Geometry2</span><span class="special">&gt;::</span><span class="identifier">type</span><span class="special">,</span> <span class="identifier">Strategy</span> <span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">discrete_hausdorff_distance</span><span class="special">(</span><span class="identifier">Geometry1</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">geometry1</span><span class="special">,</span> <span class="identifier">Geometry2</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">geometry2</span><span class="special">,</span> <span class="identifier">Strategy</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">strategy</span><span class="special">)</span></pre>
  44 <p>
  45           </p>
  46 <h6>
  47 <a name="geometry.reference.algorithms.discrete_hausdorff_distance.discrete_hausdorff_distance_3_with_strategy.h1"></a>
  48             <span class="phrase"><a name="geometry.reference.algorithms.discrete_hausdorff_distance.discrete_hausdorff_distance_3_with_strategy.parameters"></a></span><a class="link" href="discrete_hausdorff_distance_3_with_strategy.html#geometry.reference.algorithms.discrete_hausdorff_distance.discrete_hausdorff_distance_3_with_strategy.parameters">Parameters</a>
  49           </h6>
  50 <div class="informaltable"><table class="table">
  51 <colgroup>
  52 <col>
  53 <col>
  54 <col>
  55 <col>
  56 </colgroup>
  57 <thead><tr>
  58 <th>
  59                     <p>
  60                       Type
  61                     </p>
  62                   </th>
  63 <th>
  64                     <p>
  65                       Concept
  66                     </p>
  67                   </th>
  68 <th>
  69                     <p>
  70                       Name
  71                     </p>
  72                   </th>
  73 <th>
  74                     <p>
  75                       Description
  76                     </p>
  77                   </th>
  78 </tr></thead>
  79 <tbody>
  80 <tr>
  81 <td>
  82                     <p>
  83                       Geometry1 const &amp;
  84                     </p>
  85                   </td>
  86 <td>
  87                     <p>
  88                       Any type fulfilling a Geometry Concept
  89                     </p>
  90                   </td>
  91 <td>
  92                     <p>
  93                       geometry1
  94                     </p>
  95                   </td>
  96 <td>
  97                     <p>
  98                       Input geometry
  99                     </p>
 100                   </td>
 101 </tr>
 102 <tr>
 103 <td>
 104                     <p>
 105                       Geometry2 const &amp;
 106                     </p>
 107                   </td>
 108 <td>
 109                     <p>
 110                       Any type fulfilling a Geometry Concept
 111                     </p>
 112                   </td>
 113 <td>
 114                     <p>
 115                       geometry2
 116                     </p>
 117                   </td>
 118 <td>
 119                     <p>
 120                       Input geometry
 121                     </p>
 122                   </td>
 123 </tr>
 124 <tr>
 125 <td>
 126                     <p>
 127                       Strategy const &amp;
 128                     </p>
 129                   </td>
 130 <td>
 131                     <p>
 132                       A type fulfilling a DistanceStrategy concept
 133                     </p>
 134                   </td>
 135 <td>
 136                     <p>
 137                       strategy
 138                     </p>
 139                   </td>
 140 <td>
 141                     <p>
 142                       Distance strategy to be used to calculate Pt-Pt distance
 143                     </p>
 144                   </td>
 145 </tr>
 146 </tbody>
 147 </table></div>
 148 <h6>
 149 <a name="geometry.reference.algorithms.discrete_hausdorff_distance.discrete_hausdorff_distance_3_with_strategy.h2"></a>
 150             <span class="phrase"><a name="geometry.reference.algorithms.discrete_hausdorff_distance.discrete_hausdorff_distance_3_with_strategy.header"></a></span><a class="link" href="discrete_hausdorff_distance_3_with_strategy.html#geometry.reference.algorithms.discrete_hausdorff_distance.discrete_hausdorff_distance_3_with_strategy.header">Header</a>
 151           </h6>
 152 <p>
 153             Either
 154           </p>
 155 <p>
 156             <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
 157           </p>
 158 <p>
 159             Or
 160           </p>
 161 <p>
 162             <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">/</span><span class="identifier">algorithms</span><span class="special">/</span><span class="identifier">discrete_hausdorff_distance</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
 163           </p>
 164 <h6>
 165 <a name="geometry.reference.algorithms.discrete_hausdorff_distance.discrete_hausdorff_distance_3_with_strategy.h3"></a>
 166             <span class="phrase"><a name="geometry.reference.algorithms.discrete_hausdorff_distance.discrete_hausdorff_distance_3_with_strategy.behavior"></a></span><a class="link" href="discrete_hausdorff_distance_3_with_strategy.html#geometry.reference.algorithms.discrete_hausdorff_distance.discrete_hausdorff_distance_3_with_strategy.behavior">Behavior</a>
 167           </h6>
 168 <p>
 169             The algorithm calculate discrete hausdorff distance between two geometries.
 170           </p>
 171 <div class="note"><table border="0" summary="Note">
 172 <tr>
 173 <td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../../../../doc/src/images/note.png"></td>
 174 <th align="left">Note</th>
 175 </tr>
 176 <tr><td align="left" valign="top"><p>
 177               The units of the distance depends on strategy. In order to change the
 178               default behavior a user has to create a strategy and pass it explicitly
 179               into the algorithm.
 180             </p></td></tr>
 181 </table></div>
 182 <h6>
 183 <a name="geometry.reference.algorithms.discrete_hausdorff_distance.discrete_hausdorff_distance_3_with_strategy.h4"></a>
 184             <span class="phrase"><a name="geometry.reference.algorithms.discrete_hausdorff_distance.discrete_hausdorff_distance_3_with_strategy.available_strategies"></a></span><a class="link" href="discrete_hausdorff_distance_3_with_strategy.html#geometry.reference.algorithms.discrete_hausdorff_distance.discrete_hausdorff_distance_3_with_strategy.available_strategies">Available
 185             Strategies</a>
 186           </h6>
 187 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
 188 <li class="listitem">
 189                 <a class="link" href="../../strategies/strategy_distance_pythagoras.html" title="strategy::distance::pythagoras">Pythagoras
 190                 (cartesian)</a>
 191               </li>
 192 <li class="listitem">
 193                 <a class="link" href="../../strategies/strategy_distance_haversine.html" title="strategy::distance::haversine">Haversine
 194                 (spherical)</a>
 195               </li>
 196 </ul></div>
 197 <h6>
 198 <a name="geometry.reference.algorithms.discrete_hausdorff_distance.discrete_hausdorff_distance_3_with_strategy.h5"></a>
 199             <span class="phrase"><a name="geometry.reference.algorithms.discrete_hausdorff_distance.discrete_hausdorff_distance_3_with_strategy.example"></a></span><a class="link" href="discrete_hausdorff_distance_3_with_strategy.html#geometry.reference.algorithms.discrete_hausdorff_distance.discrete_hausdorff_distance_3_with_strategy.example">Example</a>
 200           </h6>
 201 <p>
 202             Calculate Similarity between two geometries as the discrete hausdorff
 203             distance between them.
 204           </p>
 205 <p>
 206 </p>
 207 <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">iostream</span><span class="special">&gt;</span>
 208
 209 <span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
 210 <span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">/</span><span class="identifier">geometries</span><span class="special">/</span><span class="identifier">point</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
 211 <span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">geometry</span><span class="special">/</span><span class="identifier">geometries</span><span class="special">/</span><span class="identifier">linestring</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
 212
 213 <span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
 214 <span class="special">{</span>
 215     <span class="keyword">namespace</span> <span class="identifier">bg</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">geometry</span><span class="special">;</span>
 216     <span class="keyword">typedef</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">model</span><span class="special">::</span><span class="identifier">point</span><span class="special">&lt;</span><span class="keyword">double</span><span class="special">,</span> <span class="number">2</span><span class="special">,</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">cs</span><span class="special">::</span><span class="identifier">geographic</span><span class="special">&lt;</span><span class="identifier">bg</span><span class="special">::</span><span class="identifier">degree</span><span class="special">&gt;</span> <span class="special">&gt;</span> <span class="identifier">point_type</span><span class="special">;</span>
 217     <span class="keyword">typedef</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">model</span><span class="special">::</span><span class="identifier">linestring</span><span class="special">&lt;</span><span class="identifier">point_type</span><span class="special">&gt;</span> <span class="identifier">linestring_type</span><span class="special">;</span>
 218
 219     <span class="identifier">linestring_type</span> <span class="identifier">ls1</span><span class="special">,</span> <span class="identifier">ls2</span><span class="special">;</span>
 220     <span class="identifier">bg</span><span class="special">::</span><span class="identifier">read_wkt</span><span class="special">(</span><span class="string">"LINESTRING(0 0,1 1,1 2,2 1,2 2)"</span><span class="special">,</span> <span class="identifier">ls1</span><span class="special">);</span>
 221     <span class="identifier">bg</span><span class="special">::</span><span class="identifier">read_wkt</span><span class="special">(</span><span class="string">"LINESTRING(1 0,0 1,1 1,2 1,3 1)"</span><span class="special">,</span> <span class="identifier">ls2</span><span class="special">);</span>
 222
 223     <span class="identifier">bg</span><span class="special">::</span><span class="identifier">srs</span><span class="special">::</span><span class="identifier">spheroid</span><span class="special">&lt;</span><span class="keyword">double</span><span class="special">&gt;</span> <span class="identifier">spheroid</span><span class="special">(</span><span class="number">6378137.0</span><span class="special">,</span> <span class="number">6356752.3142451793</span><span class="special">);</span>
 224     <span class="identifier">bg</span><span class="special">::</span><span class="identifier">strategy</span><span class="special">::</span><span class="identifier">distance</span><span class="special">::</span><span class="identifier">geographic</span><span class="special">&lt;&gt;</span> <span class="identifier">strategy</span><span class="special">(</span><span class="identifier">spheroid</span><span class="special">);</span>
 225
 226     <span class="keyword">double</span> <span class="identifier">res</span> <span class="special">=</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">discrete_hausdorff_distance</span><span class="special">(</span><span class="identifier">ls1</span><span class="special">,</span> <span class="identifier">ls2</span><span class="special">,</span> <span class="identifier">strategy</span><span class="special">);</span>
 227
 228     <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"Discrete Hausdorff Distance: "</span> <span class="special">&lt;&lt;</span> <span class="identifier">res</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
 229
 230     <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span>
 231 <span class="special">}</span>
 232 </pre>
 233 <p>
 234           </p>
 235 <p>
 236             Output:
 237           </p>
 238 <pre class="programlisting">Discrete Hausdorff Distance: 110574
 239 </pre>
 240 </div>
 241 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 242 <td align="left"></td>
 243 <td align="right"><div class="copyright-footer">Copyright &#169; 2009-2019 Barend Gehrels, Bruno Lalande, Mateusz Loskot, Adam
 244       Wulkiewicz, Oracle and/or its affiliates<p>
 245         Distributed under the Boost Software License, Version 1.0. (See accompanying
 246         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>)
 247       </p>
 248 </div></td>
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