メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.375588646334 43.8272148701575, 142.374024081552 43.8267957758502, 142.372429387223 43.8259013364, 142.37327931953 43.8253018230783, 142.375748906349 43.8270984896424, 142.375588646334 43.8272148701575)) ^^http://www.opengis.net/ont/geosparql#wktLiteral