メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.4812500 37.5791667, 140.4875000 37.5791667, 140.4875000 37.5833333, 140.4812500 37.5833333, 140.4812500 37.5791667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral