メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.041266494296 43.5735395312199, 142.040715065544 43.5738445045649, 142.0399496332 43.573273858383, 142.040432481214 43.5723603815583, 142.040608570584 43.5725612980671, 142.041266494296 43.5735395312199)) ^^http://www.opengis.net/ont/geosparql#wktLiteral