/a></span>
<span id="cb37-3"><a></a><span class="fu">nrow</span>(cities)</span>
<span id="cb37-4"><a></a><span class="co">#&gt; [1] 31254</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
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<div class="sourceCode cell-code" id="cb38"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb38-1"><a></a><span class="co"># Great Circle Distance in GCS</span>