>Coordinate Systems</h2>
<ul>
<li><p>Coordinate Reference Systems (CRS) define how spatial features relate to the surface of the Earth.</p></li>
<li><p>CRSs are either geographic or projected…</p></li>
<li><p>CRSs are measurement units for coordinates…</p></li>
</ul>
</section>
<section id="sf-tools" class="slide level2">
<h2><code>sf</code> tools</h2>
<p>In <code>sf</code> we have <em>three</em> tools for exploring, define, and changing CRS systems:</p>
<ul>
<li><p><em>st_crs</em> : Retrieve coordinate