メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.6500000 33.6166667, 130.6562500 33.6166667, 130.6562500 33.6208334, 130.6500000 33.6208334, 130.6500000 33.6166667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral