メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.6500000 34.5125000, 133.6562500 34.5125000, 133.6562500 34.5166667, 133.6500000 34.5166667, 133.6500000 34.5125000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral