メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.1562500 34.0541667, 135.1625000 34.0541667, 135.1625000 34.0583333, 135.1562500 34.0583333, 135.1562500 34.0541667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral