メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.267852135397 44.0208746799148, 144.266299974537 44.0207177685335, 144.266413266862 44.0201679892132, 144.267992364076 44.0203265721032, 144.267852135397 44.0208746799148)) ^^http://www.opengis.net/ont/geosparql#wktLiteral