メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.2500000 34.3541667, 135.2562500 34.3541667, 135.2562500 34.3583333, 135.2500000 34.3583333, 135.2500000 34.3541667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral