メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.3500000 33.7791667, 134.3562500 33.7791667, 134.3562500 33.7833333, 134.3500000 33.7833333, 134.3500000 33.7791667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral