Geoid:
<ol><li>Ocean</li>
<li>Ellipsoid</li>
<li>Local plumb</li>
<li>Continent</li>
<li>Geoid</li></ol>
<a href="//commons.wikimedia.org/wiki/User:MesserWoland" title="User:MesserWoland">MesserWoland</a>
<span class="int-own-work" lang="en">Own work</span>