メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.37327931953 43.8253018230783, 142.372429387223 43.8259013364, 142.371046064459 43.8251135393948, 142.372013007021 43.8244263987553, 142.37327931953 43.8253018230783)) ^^http://www.opengis.net/ont/geosparql#wktLiteral