=</span> co, <span class="fu">aes</span>(<span class="at">fill =</span> aland<span class="sc">/</span><span class="fl">1e10</span>)) <span class="sc">+</span></span>
<span id="cb27-3"><a></a>  <span class="fu">geom_sf</span>(<span class="at">data =</span> co_cities, <span class="fu">aes</span>(<span class="at">size =</span> population<span class="sc">/</span><span class="fl">1e5</span>), <span class="at">col =</span> <span class="st">"red"</span>)</span></code><button title="Copy to Clipboard" class="code-c