メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.383269989168 43.7522977104968, 142.383313283507 43.7526355028121, 142.38343571789 43.7526384194204, 142.383434826853 43.7528039934368, 142.382254572235 43.75314529126, 142.381969148915 43.7526675372774, 142.381705381313 43.7522360296755, 142.383197515931 43.7518278356641, 142.383269989168 43.7522977104968)) ^^http://www.opengis.net/ont/geosparql#wktLiteral