メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.911736915119 43.5261546641284, 141.910313313056 43.5263650310338, 141.910125240457 43.5263176022038, 141.909267364935 43.5234095739457, 141.910891827716 43.5232112475169, 141.911087334502 43.5239243672044, 141.911421916048 43.5250889326076, 141.911736915119 43.5261546641284)) ^^http://www.opengis.net/ont/geosparql#wktLiteral