メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((145.576612401663 43.3282638905682, 145.576074496906 43.3286582845425, 145.575545626624 43.3290630305707, 145.574445502776 43.3282929066026, 145.575011957507 43.3278849624284, 145.575506742763 43.3274982274023, 145.576612401663 43.3282638905682)) ^^http://www.opengis.net/ont/geosparql#wktLiteral