メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.369558395577 43.8338147402276, 142.368640385945 43.834498785783, 142.366819430995 43.8336238437677, 142.368002129336 43.8327229888945, 142.369558395577 43.8338147402276)) ^^http://www.opengis.net/ont/geosparql#wktLiteral