メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.9750000 34.5083333, 134.9812500 34.5083333, 134.9812500 34.5125000, 134.9750000 34.5125000, 134.9750000 34.5083333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral