メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.3375000 35.0083333, 134.3437500 35.0083333, 134.3437500 35.0125000, 134.3375000 35.0125000, 134.3375000 35.0083333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral