メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.440089873607 43.81601258488, 142.440600756284 43.8163368766283, 142.439441694715 43.8172963886213, 142.438930547058 43.8169840985771, 142.437327666954 43.8159825081748, 142.437702626953 43.8156735574218, 142.438484873877 43.8150059339873, 142.439113783794 43.815394293916, 142.439499771689 43.8156363127445, 142.440089873607 43.81601258488)) ^^http://www.opengis.net/ont/geosparql#wktLiteral