メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.1437500 33.4958334, 130.1500000 33.4958334, 130.1500000 33.5000000, 130.1437500 33.5000000, 130.1437500 33.4958334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral