
<span></span>
<span><span class="fu">sf_dissolve</span><span class="op">(</span><span class="va">sflayer</span>, col <span class="op">=</span> <span class="cn">NULL</span>, areacalc <span class="op">=</span> <span class="cn">TRUE</span><span class="op">)</span></span>
<span></span>
<span><span class="fu">closest_poly</span><span class="op">(</span><span class="va">x.centroid</span>, <span class="va">ypoly</span>, ypoly.att <span class="op">=</span> <span class="cn">NULL</span>, nbr <span class="op">=</span