メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.8812500 34.3791667, 134.8875000 34.3791667, 134.8875000 34.3833333, 134.8812500 34.3833333, 134.8812500 34.3791667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral