class="va">prjatt</span>, stopifnull <span class="op">=</span> <span class="cn">FALSE</span><span class="op">)</span></span>
<span></span>
<span><span class="fu">areacalc.poly</span><span class="op">(</span></span>
<span>  <span class="va">polyv</span>,</span>
<span>  polyv_dsn <span class="op">=</span> <span class="cn">NULL</span>,</span>
<span>  areaprj <span class="op">=</span> <span class="st">"aea"</span>,</span>
<span>  zone <span class="op">=</span> <span class="cn">NULL</span>,</span>
<span>  unit <