n 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>
</pre>
<p>
      </p>
<p>
        Typically <code class="computeroutput"><span class="identifier">Value</span></code>s will be
        generated in a loop from e.g. <code class="computeroutput"><span class="identifier">Polygon</span></code>s
        stored in some other conta