メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.8562500 36.0583333, 139.8625000 36.0583333, 139.8625000 36.0625000, 139.8562500 36.0625000, 139.8562500 36.0583333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral