メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.348616545288 43.1129445498135, 141.349163184269 43.1130180276997, 141.348855322039 43.1142586648676, 141.348311805901 43.1141875304472, 141.347755553754 43.1141209356915, 141.3477643793 43.1140952660603, 141.347912153648 43.1134863638771, 141.347950237022 43.1132991076363, 141.348057402133 43.112866400409, 141.348616545288 43.1129445498135)) ^^http://www.opengis.net/ont/geosparql#wktLiteral