メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.902333311818 43.4943827793933, 141.901691106954 43.494479637602, 141.901775232769 43.4942723608129, 141.901858678672 43.4941783066987, 141.901973210052 43.4940918723818, 141.902139386916 43.4940320023681, 141.902699992447 43.4938752227749, 141.90284487605 43.4938350135229, 141.903000118887 43.494282195054, 141.902333311818 43.4943827793933)) ^^http://www.opengis.net/ont/geosparql#wktLiteral