/em> - Minimum longitude of the polygon<br><em>x_max</em> - Maximum longitude of the polygon<br><em>y_min</em> - Minimum latitude of the polygon<br><em>y_max</em> - Maximum latitude of the polygon<br><em>entity_class</em> - Class of the polygon<br><em>entity_type</em> - Type of the entity<br><em>polygon_source</em> - Source of the polygon<br><em>geometry</em> - Geometry column from sf</p>
    </div>
    <div class="section level2">
    <h2 id="references">References<a class="anchor" aria-label="anchor" h