メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.756415465118 42.9063332000135, 140.757079984616 42.9062993239494, 140.757647450289 42.9062670622549, 140.757886742955 42.9087350094973, 140.755657376047 42.9088433355906, 140.755552000002 42.9077947974546, 140.755415457231 42.90638491354, 140.755415812117 42.9063702190712, 140.756415465118 42.9063332000135)) ^^http://www.opengis.net/ont/geosparql#wktLiteral