メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.1875000 34.9541667, 134.1937500 34.9541667, 134.1937500 34.9583333, 134.1875000 34.9583333, 134.1875000 34.9541667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral