メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.943586386377 42.9391691746503, 142.942644429444 42.9396191528586, 142.94250723116 42.9396981900758, 142.942437691138 42.9396218082431, 142.942115164399 42.9392185791099, 142.941799973883 42.9388245186695, 142.941968439469 42.9387766605169, 142.942942057909 42.9385000037954, 142.94315381071 42.9384456237347, 142.943768341384 42.9390822699309, 142.943586386377 42.9391691746503)) ^^http://www.opengis.net/ont/geosparql#wktLiteral