メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.839860434572 34.8976604109772, 136.840566911813 34.8978813053805, 136.840543794657 34.8979887858212, 136.840257434855 34.8992382288015, 136.839913920657 34.9004284980975, 136.839004325549 34.9001515457393, 136.837632865448 34.8997107659192, 136.837764487797 34.8991765124783, 136.83826368303 34.8971504200311, 136.838306273449 34.8971716661584, 136.839568431418 34.8975691098962, 136.839860434572 34.8976604109772)) ^^http://www.opengis.net/ont/geosparql#wktLiteral