メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.3437500 33.8291667, 134.3500000 33.8291667, 134.3500000 33.8333333, 134.3437500 33.8333333, 134.3437500 33.8291667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral