メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.4812500 34.4458334, 133.4875000 34.4458334, 133.4875000 34.4500000, 133.4812500 34.4500000, 133.4812500 34.4458334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral