メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.1000000 37.8958334, 140.1062500 37.8958334, 140.1062500 37.9000000, 140.1000000 37.9000000, 140.1000000 37.8958334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral