modules/custom/eml/templates/eml--node--research-site.tpl.php
<geographicCoverage>
<geographicDescription>
<?php print render($content['field_description']); ?>
<?php print render($content['field_site_details']); ?>
</geographicDescription>
<?php if (!empty($content['field_coordinates'])): ?>
<boundingCoordinates>
<?php print render($content['field_coordinates']); ?>
<?php if (!empty($content['field_elevation'])): ?>
<boundingAltitudes>
<altitudeMinimum><?php print render($content['field_elevation']); ?></altitudeMinimum>
<altitudeMaximum><?php print render($content['field_elevation']); ?></altitudeMaximum>
<altitudeUnits>meter</altitudeUnits>
</boundingAltitudes>
<?php endif; ?>
</boundingCoordinates>
<?php endif; ?>
</geographicCoverage>