1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>discrete_hausdorff_distance (with strategy)</title> 5<link rel="stylesheet" href="../../../../../../../../doc/src/boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../../../../index.html" title="Chapter 1. Geometry"> 8<link rel="up" href="../discrete_hausdorff_distance.html" title="discrete_hausdorff_distance"> 9<link rel="prev" href="../discrete_hausdorff_distance.html" title="discrete_hausdorff_distance"> 10<link rel="next" href="discrete_hausdorff_distance_2.html" title="discrete_hausdorff_distance"> 11</head> 12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13<table cellpadding="2" width="100%"><tr> 14<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../../boost.png"></td> 15<td align="center"><a href="../../../../../../../../index.html">Home</a></td> 16<td align="center"><a href="../../../../../../../../libs/libraries.htm">Libraries</a></td> 17<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 18<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 19<td align="center"><a href="../../../../../../../../more/index.htm">More</a></td> 20</tr></table> 21<hr> 22<div class="spirit-nav"> 23<a accesskey="p" href="../discrete_hausdorff_distance.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../discrete_hausdorff_distance.html"><img src="../../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../../index.html"><img src="../../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="discrete_hausdorff_distance_2.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 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="idm45635700771312"></a> 32Calculate 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"><</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">></span> 43<span class="identifier">distance_result</span><span class="special"><</span> <span class="keyword">typename</span> <span class="identifier">point_type</span><span class="special"><</span><span class="identifier">Geometry1</span><span class="special">>::</span><span class="identifier">type</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">point_type</span><span class="special"><</span><span class="identifier">Geometry2</span><span class="special">>::</span><span class="identifier">type</span><span class="special">,</span> <span class="identifier">Strategy</span> <span class="special">>::</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">&</span> <span class="identifier">geometry1</span><span class="special">,</span> <span class="identifier">Geometry2</span> <span class="keyword">const</span> <span class="special">&</span> <span class="identifier">geometry2</span><span class="special">,</span> <span class="identifier">Strategy</span> <span class="keyword">const</span> <span class="special">&</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 & 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 & 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 & 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"><</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">></span></code> 157 </p> 158<p> 159 Or 160 </p> 161<p> 162 <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special"><</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">></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"><</span><span class="identifier">iostream</span><span class="special">></span> 208 209<span class="preprocessor">#include</span> <span class="special"><</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">></span> 210<span class="preprocessor">#include</span> <span class="special"><</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">></span> 211<span class="preprocessor">#include</span> <span class="special"><</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">></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"><</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"><</span><span class="identifier">bg</span><span class="special">::</span><span class="identifier">degree</span><span class="special">></span> <span class="special">></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"><</span><span class="identifier">point_type</span><span class="special">></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"><</span><span class="keyword">double</span><span class="special">></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"><></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"><<</span> <span class="string">"Discrete Hausdorff Distance: "</span> <span class="special"><<</span> <span class="identifier">res</span> <span class="special"><<</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 © 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> 249</tr></table> 250<hr> 251<div class="spirit-nav"> 252<a accesskey="p" href="../discrete_hausdorff_distance.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../discrete_hausdorff_distance.html"><img src="../../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../../index.html"><img src="../../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="discrete_hausdorff_distance_2.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 253</div> 254</body> 255</html> 256
