/span> [[1]]</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> &lt;BNGReference[4] with Resolution=5km&gt;</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> [1] &lt;SU 3 6 SW&gt; &lt;SU 3 6 SE&gt; &lt;SU 3 6 NW&gt; &lt;SU 3 6 NE&gt;</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> </span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="fu">bng_to_parent</span><span class="op">(</span><span class="fu"><a href="as_bng_reference.html">as_bng_re