メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.2625000 34.2791667, 134.2687500 34.2791667, 134.2687500 34.2833333, 134.2625000 34.2833333, 134.2625000 34.2791667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral