<span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/sum.html">sum</a></span><span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/base/MathFun.html">abs</a></span><span class="op">(</span><span class="va">elevation</span><span class="op">)</span><span class="op">)</span><span class="op">)</span> <span class="op">%&gt;%</span>
  <span class="fu"><a href="https://ggplot2.tidyverse.org/reference/ggplot.html">ggplot</a></span><span class="op">(</span><span class="fu"><a hre