メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.4750000 34.1083333, 134.4812500 34.1083333, 134.4812500 34.1125000, 134.4750000 34.1125000, 134.4750000 34.1083333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral