me</code> and <code>elevation</code>.</p></dd>


<dt><code>metadata</code></dt>
<dd><p>As with all <code>oce</code> objects, the <code>metadata</code> slot
for <code>sealevel</code> objects is a <a href="https://rdrr.io/r/base/list.html" class="external-link">list</a> containing
information about the <code>data</code> or about the object itself.
An example of the former might be the location at which a <code>sealevel</code> measurement was made, stored in <code>longitude</code> and <code>latitude</code>, an