メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.76020802966 42.9086199722379, 140.757886742955 42.9087350094973, 140.757647450289 42.9062670622549, 140.757667092467 42.9062658412154, 140.757665603416 42.906256186529, 140.758495685083 42.9061767772722, 140.759915435976 42.9061009085469, 140.76020802966 42.9086199722379)) ^^http://www.opengis.net/ont/geosparql#wktLiteral