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<pre class="programlisting"><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>
<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>
<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">box</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>

<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">index</span><span class="special">/</span><span class="identifier">rtree</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>

<span class="comment">// to store queries results</span>
<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">vector</span><span class="special">&gt;</span>

<span class="comment">// just for output</span>
<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">iostream</span><span class="special">&gt;</span>
<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">foreach</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>

<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>
<span class="keyword">namespace</span> <span class="identifier">bgi</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">index</span><span class="special">;</span>

<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
<span class="special">{</span>
    <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">float</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">cartesian</span><span class="special">&gt;</span> <span class="identifier">point</span><span class="special">;</span>
    <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">box</span><span class="special">&lt;</span><span class="identifier">point</span><span class="special">&gt;</span> <span class="identifier">box</span><span class="special">;</span>
    <span class="keyword">typedef</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">pair</span><span class="special">&lt;</span><span class="identifier">box</span><span class="special">,</span> <span class="keyword">unsigned</span><span class="special">&gt;</span> <span class="identifier">value</span><span class="special">;</span>

    <span class="comment">// create the rtree using default constructor</span>
    <span class="identifier">bgi</span><span class="special">::</span><span class="identifier">rtree</span><span class="special">&lt;</span> <span class="identifier">value</span><span class="special">,</span> <span class="identifier">bgi</span><span class="special">::</span><span class="identifier">quadratic</span><span class="special">&lt;</span><span class="number">16</span><span class="special">&gt;</span> <span class="special">&gt;</span> <span class="identifier">rtree</span><span class="special">;</span>

    <span class="comment">// create some values</span>
    <span class="keyword">for</span> <span class="special">(</span> <span class="keyword">unsigned</span> <span class="identifier">i</span> <span class="special">=</span> <span class="number">0</span> <span class="special">;</span> <span class="identifier">i</span> <span class="special">&lt;</span> <span class="number">10</span> <span class="special">;</span> <span class="special">++</span><span class="identifier">i</span> <span class="special">)</span>
    <span class="special">{</span>
        <span class="comment">// create a box</span>
        <span class="identifier">box</span> <span class="identifier">b</span><span class="special">(</span><span class="identifier">point</span><span class="special">(</span><span class="identifier">i</span> <span class="special">+</span> <span class="number">0.0f</span><span class="special">,</span> <span class="identifier">i</span> <span class="special">+</span> <span class="number">0.0f</span><span class="special">),</span> <span class="identifier">point</span><span class="special">(</span><span class="identifier">i</span> <span class="special">+</span> <span class="number">0.5f</span><span class="special">,</span> <span class="identifier">i</span> <span class="special">+</span> <span class="number">0.5f</span><span class="special">));</span>
        <span class="comment">// insert new value</span>
        <span class="identifier">rtree</span><span class="special">.</span><span class="identifier">insert</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">make_pair</span><span class="special">(</span><span class="identifier">b</span><span class="special">,</span> <span class="identifier">i</span><span class="special">));</span>
    <span class="special">}</span>

    <span class="comment">// find values intersecting some area defined by a box</span>
    <span class="identifier">box</span> <span class="identifier">query_box</span><span class="special">(</span><span class="identifier">point</span><span class="special">(</span><span class="number">0</span><span class="special">,</span> <span class="number">0</span><span class="special">),</span> <span class="identifier">point</span><span class="special">(</span><span class="number">5</span><span class="special">,</span> <span class="number">5</span><span class="special">));</span>
    <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span><span class="identifier">value</span><span class="special">&gt;</span> <span class="identifier">result_s</span><span class="special">;</span>
    <span class="identifier">rtree</span><span class="special">.</span><span class="identifier">query</span><span class="special">(</span><span class="identifier">bgi</span><span class="special">::</span><span class="identifier">intersects</span><span class="special">(</span><span class="identifier">query_box</span><span class="special">),</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">back_inserter</span><span class="special">(</span><span class="identifier">result_s</span><span class="special">));</span>

    <span class="comment">// find 5 nearest values to a point</span>
    <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span><span class="identifier">value</span><span class="special">&gt;</span> <span class="identifier">result_n</span><span class="special">;</span>
    <span class="identifier">rtree</span><span class="special">.</span><span class="identifier">query</span><span class="special">(</span><span class="identifier">bgi</span><span class="special">::</span><span class="identifier">nearest</span><span class="special">(</span><span class="identifier">point</span><span class="special">(</span><span class="number">0</span><span class="special">,</span> <span class="number">0</span><span class="special">),</span> <span class="number">5</span><span class="special">),</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">back_inserter</span><span class="special">(</span><span class="identifier">result_n</span><span class="special">));</span>

    <span class="comment">// note: in Boost.Geometry WKT representation of a box is polygon</span>

    <span class="comment">// display results</span>
    <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"spatial query box:"</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>
    <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">wkt</span><span class="special">&lt;</span><span class="identifier">box</span><span class="special">&gt;(</span><span class="identifier">query_box</span><span class="special">)</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>
    <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"spatial query result:"</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>
    <span class="identifier">BOOST_FOREACH</span><span class="special">(</span><span class="identifier">value</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">v</span><span class="special">,</span> <span class="identifier">result_s</span><span class="special">)</span>
        <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">wkt</span><span class="special">&lt;</span><span class="identifier">box</span><span class="special">&gt;(</span><span class="identifier">v</span><span class="special">.</span><span class="identifier">first</span><span class="special">)</span> <span class="special">&lt;&lt;</span> <span class="string">" - "</span> <span class="special">&lt;&lt;</span> <span class="identifier">v</span><span class="special">.</span><span class="identifier">second</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>

    <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"knn query point:"</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>
    <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">wkt</span><span class="special">&lt;</span><span class="identifier">point</span><span class="special">&gt;(</span><span class="identifier">point</span><span class="special">(</span><span class="number">0</span><span class="special">,</span> <span class="number">0</span><span class="special">))</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>
    <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"knn query result:"</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>
    <span class="identifier">BOOST_FOREACH</span><span class="special">(</span><span class="identifier">value</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">v</span><span class="special">,</span> <span class="identifier">result_n</span><span class="special">)</span>
        <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="identifier">bg</span><span class="special">::</span><span class="identifier">wkt</span><span class="special">&lt;</span><span class="identifier">box</span><span class="special">&gt;(</span><span class="identifier">v</span><span class="special">.</span><span class="identifier">first</span><span class="special">)</span> <span class="special">&lt;&lt;</span> <span class="string">" - "</span> <span class="special">&lt;&lt;</span> <span class="identifier">v</span><span class="special">.</span><span class="identifier">second</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>

    <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span>
<span class="special">}</span>
</pre>
<p>
        </p>
<h5>
<a name="geometry.spatial_indexes.rtree_examples.quick_start.h0"></a>
          <span class="phrase"><a name="geometry.spatial_indexes.rtree_examples.quick_start.expected_results"></a></span><a class="link" href="quick_start.html#geometry.spatial_indexes.rtree_examples.quick_start.expected_results">Expected
          results</a>
        </h5>
<pre class="programlisting"><span class="identifier">spatial</span> <span class="identifier">query</span> <span class="identifier">box</span><span class="special">:</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">0</span> <span class="number">0</span><span class="special">,</span><span class="number">0</span> <span class="number">5</span><span class="special">,</span><span class="number">5</span> <span class="number">5</span><span class="special">,</span><span class="number">5</span> <span class="number">0</span><span class="special">,</span><span class="number">0</span> <span class="number">0</span><span class="special">))</span>
<span class="identifier">spatial</span> <span class="identifier">query</span> <span class="identifier">result</span><span class="special">:</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">0</span> <span class="number">0</span><span class="special">,</span><span class="number">0</span> <span class="number">0.5</span><span class="special">,</span><span class="number">0.5</span> <span class="number">0.5</span><span class="special">,</span><span class="number">0.5</span> <span class="number">0</span><span class="special">,</span><span class="number">0</span> <span class="number">0</span><span class="special">))</span> <span class="special">-</span> <span class="number">0</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">1</span> <span class="number">1</span><span class="special">,</span><span class="number">1</span> <span class="number">1.5</span><span class="special">,</span><span class="number">1.5</span> <span class="number">1.5</span><span class="special">,</span><span class="number">1.5</span> <span class="number">1</span><span class="special">,</span><span class="number">1</span> <span class="number">1</span><span class="special">))</span> <span class="special">-</span> <span class="number">1</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">2</span> <span class="number">2</span><span class="special">,</span><span class="number">2</span> <span class="number">2.5</span><span class="special">,</span><span class="number">2.5</span> <span class="number">2.5</span><span class="special">,</span><span class="number">2.5</span> <span class="number">2</span><span class="special">,</span><span class="number">2</span> <span class="number">2</span><span class="special">))</span> <span class="special">-</span> <span class="number">2</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">3</span> <span class="number">3</span><span class="special">,</span><span class="number">3</span> <span class="number">3.5</span><span class="special">,</span><span class="number">3.5</span> <span class="number">3.5</span><span class="special">,</span><span class="number">3.5</span> <span class="number">3</span><span class="special">,</span><span class="number">3</span> <span class="number">3</span><span class="special">))</span> <span class="special">-</span> <span class="number">3</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">4</span> <span class="number">4</span><span class="special">,</span><span class="number">4</span> <span class="number">4.5</span><span class="special">,</span><span class="number">4.5</span> <span class="number">4.5</span><span class="special">,</span><span class="number">4.5</span> <span class="number">4</span><span class="special">,</span><span class="number">4</span> <span class="number">4</span><span class="special">))</span> <span class="special">-</span> <span class="number">4</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">5</span> <span class="number">5</span><span class="special">,</span><span class="number">5</span> <span class="number">5.5</span><span class="special">,</span><span class="number">5.5</span> <span class="number">5.5</span><span class="special">,</span><span class="number">5.5</span> <span class="number">5</span><span class="special">,</span><span class="number">5</span> <span class="number">5</span><span class="special">))</span> <span class="special">-</span> <span class="number">5</span>
<span class="identifier">knn</span> <span class="identifier">query</span> <span class="identifier">point</span><span class="special">:</span>
<span class="identifier">POINT</span><span class="special">(</span><span class="number">0</span> <span class="number">0</span><span class="special">)</span>
<span class="identifier">knn</span> <span class="identifier">query</span> <span class="identifier">result</span><span class="special">:</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">4</span> <span class="number">4</span><span class="special">,</span><span class="number">4</span> <span class="number">4.5</span><span class="special">,</span><span class="number">4.5</span> <span class="number">4.5</span><span class="special">,</span><span class="number">4.5</span> <span class="number">4</span><span class="special">,</span><span class="number">4</span> <span class="number">4</span><span class="special">))</span> <span class="special">-</span> <span class="number">4</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">3</span> <span class="number">3</span><span class="special">,</span><span class="number">3</span> <span class="number">3.5</span><span class="special">,</span><span class="number">3.5</span> <span class="number">3.5</span><span class="special">,</span><span class="number">3.5</span> <span class="number">3</span><span class="special">,</span><span class="number">3</span> <span class="number">3</span><span class="special">))</span> <span class="special">-</span> <span class="number">3</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">2</span> <span class="number">2</span><span class="special">,</span><span class="number">2</span> <span class="number">2.5</span><span class="special">,</span><span class="number">2.5</span> <span class="number">2.5</span><span class="special">,</span><span class="number">2.5</span> <span class="number">2</span><span class="special">,</span><span class="number">2</span> <span class="number">2</span><span class="special">))</span> <span class="special">-</span> <span class="number">2</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">0</span> <span class="number">0</span><span class="special">,</span><span class="number">0</span> <span class="number">0.5</span><span class="special">,</span><span class="number">0.5</span> <span class="number">0.5</span><span class="special">,</span><span class="number">0.5</span> <span class="number">0</span><span class="special">,</span><span class="number">0</span> <span class="number">0</span><span class="special">))</span> <span class="special">-</span> <span class="number">0</span>
<span class="identifier">POLYGON</span><span class="special">((</span><span class="number">1</span> <span class="number">1</span><span class="special">,</span><span class="number">1</span> <span class="number">1.5</span><span class="special">,</span><span class="number">1.5</span> <span class="number">1.5</span><span class="special">,</span><span class="number">1.5</span> <span class="number">1</span><span class="special">,</span><span class="number">1</span> <span class="number">1</span><span class="special">))</span> <span class="special">-</span> <span class="number">1</span>
</pre>
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        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>)
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