3 <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
4 <title>discrete_frechet_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_frechet_distance.html" title="discrete_frechet_distance">
9 <link rel="prev" href="../discrete_frechet_distance.html" title="discrete_frechet_distance">
10 <link rel="next" href="discrete_frechet_distance_2.html" title="discrete_frechet_distance">
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>
22 <div class="spirit-nav">
23 <a accesskey="p" href="../discrete_frechet_distance.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../discrete_frechet_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_frechet_distance_2.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a>
26 <div class="titlepage"><div><div><h5 class="title">
27 <a name="geometry.reference.algorithms.discrete_frechet_distance.discrete_frechet_distance_3_with_strategy"></a><a class="link" href="discrete_frechet_distance_3_with_strategy.html" title="discrete_frechet_distance (with strategy)">discrete_frechet_distance
29 </h5></div></div></div>
31 <a class="indexterm" name="idm46187003150896"></a>
32 Calculate discrete Frechet distance between two geometries (currently
33 works for LineString-LineString) using specified strategy.
36 <a name="geometry.reference.algorithms.discrete_frechet_distance.discrete_frechet_distance_3_with_strategy.h0"></a>
37 <span class="phrase"><a name="geometry.reference.algorithms.discrete_frechet_distance.discrete_frechet_distance_3_with_strategy.synopsis"></a></span><a class="link" href="discrete_frechet_distance_3_with_strategy.html#geometry.reference.algorithms.discrete_frechet_distance.discrete_frechet_distance_3_with_strategy.synopsis">Synopsis</a>
41 <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>
42 <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_frechet_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>
46 <a name="geometry.reference.algorithms.discrete_frechet_distance.discrete_frechet_distance_3_with_strategy.h1"></a>
47 <span class="phrase"><a name="geometry.reference.algorithms.discrete_frechet_distance.discrete_frechet_distance_3_with_strategy.parameters"></a></span><a class="link" href="discrete_frechet_distance_3_with_strategy.html#geometry.reference.algorithms.discrete_frechet_distance.discrete_frechet_distance_3_with_strategy.parameters">Parameters</a>
49 <div class="informaltable"><table class="table">
87 Any type fulfilling a Geometry Concept
104 Geometry2 const &
109 Any type fulfilling a Geometry Concept
131 A type fulfilling a DistanceStrategy concept
141 Distance strategy to be used to calculate Pt-Pt distance
148 <a name="geometry.reference.algorithms.discrete_frechet_distance.discrete_frechet_distance_3_with_strategy.h2"></a>
149 <span class="phrase"><a name="geometry.reference.algorithms.discrete_frechet_distance.discrete_frechet_distance_3_with_strategy.header"></a></span><a class="link" href="discrete_frechet_distance_3_with_strategy.html#geometry.reference.algorithms.discrete_frechet_distance.discrete_frechet_distance_3_with_strategy.header">Header</a>
155 <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>
161 <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_frechet_distance</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code>
164 <a name="geometry.reference.algorithms.discrete_frechet_distance.discrete_frechet_distance_3_with_strategy.h3"></a>
165 <span class="phrase"><a name="geometry.reference.algorithms.discrete_frechet_distance.discrete_frechet_distance_3_with_strategy.behavior"></a></span><a class="link" href="discrete_frechet_distance_3_with_strategy.html#geometry.reference.algorithms.discrete_frechet_distance.discrete_frechet_distance_3_with_strategy.behavior">Behavior</a>
168 The algorithm calculate discrete frechet distance between two geometries.
170 <div class="note"><table border="0" summary="Note">
172 <td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../../../../doc/src/images/note.png"></td>
173 <th align="left">Note</th>
175 <tr><td align="left" valign="top"><p>
176 The units of the distance depends on strategy. In order to change the
177 default behavior a user has to create a strategy and pass it explicitly
182 <a name="geometry.reference.algorithms.discrete_frechet_distance.discrete_frechet_distance_3_with_strategy.h4"></a>
183 <span class="phrase"><a name="geometry.reference.algorithms.discrete_frechet_distance.discrete_frechet_distance_3_with_strategy.available_strategies"></a></span><a class="link" href="discrete_frechet_distance_3_with_strategy.html#geometry.reference.algorithms.discrete_frechet_distance.discrete_frechet_distance_3_with_strategy.available_strategies">Available
186 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
187 <li class="listitem">
188 <a class="link" href="../../strategies/strategy_distance_pythagoras.html" title="strategy::distance::pythagoras">Pythagoras
191 <li class="listitem">
192 <a class="link" href="../../strategies/strategy_distance_haversine.html" title="strategy::distance::haversine">Haversine
197 <a name="geometry.reference.algorithms.discrete_frechet_distance.discrete_frechet_distance_3_with_strategy.h5"></a>
198 <span class="phrase"><a name="geometry.reference.algorithms.discrete_frechet_distance.discrete_frechet_distance_3_with_strategy.example"></a></span><a class="link" href="discrete_frechet_distance_3_with_strategy.html#geometry.reference.algorithms.discrete_frechet_distance.discrete_frechet_distance_3_with_strategy.example">Example</a>
201 Calculate Similarity between two geometries as the discrete frechet distance
206 <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">iostream</span><span class="special">></span>
208 <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>
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">geometries</span><span class="special">/</span><span class="identifier">point</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">linestring</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
212 <span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
213 <span class="special">{</span>
214 <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>
215 <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>
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">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 <span class="identifier">linestring_type</span> <span class="identifier">ls1</span><span class="special">,</span> <span class="identifier">ls2</span><span class="special">;</span>
219 <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>
220 <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 <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>
223 <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 <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_frechet_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 <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"Discrete Frechet 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 <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span>
230 <span class="special">}</span>
237 <pre class="programlisting">Discrete Frechet Distance: 156874
240 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
241 <td align="left"></td>
242 <td align="right"><div class="copyright-footer">Copyright © 2009-2019 Barend Gehrels, Bruno Lalande, Mateusz Loskot, Adam
243 Wulkiewicz, Oracle and/or its affiliates<p>
244 Distributed under the Boost Software License, Version 1.0. (See accompanying
245 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>)
250 <div class="spirit-nav">
251 <a accesskey="p" href="../discrete_frechet_distance.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../discrete_frechet_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_frechet_distance_2.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a>