メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.5875000 34.0083333, 134.5937500 34.0083333, 134.5937500 34.0125000, 134.5875000 34.0125000, 134.5875000 34.0083333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral