メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.267992364076 44.0203265721032, 144.266413266862 44.0201679892132, 144.266537513664 44.0195850559036, 144.268072720539 44.0197371431813, 144.267992364076 44.0203265721032)) ^^http://www.opengis.net/ont/geosparql#wktLiteral