メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.863754523368 36.2897321814288, 139.862224545516 36.2903864730353, 139.861686199798 36.2896339622591, 139.86291360649 36.2891792028866, 139.863672985096 36.2888276406646, 139.863448843774 36.2884876924914, 139.864814482175 36.2878749385899, 139.865472524848 36.2889776733869, 139.863754523368 36.2897321814288)) ^^http://www.opengis.net/ont/geosparql#wktLiteral