メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.363686605917 43.0937526329365, 141.363573055607 43.0941462928378, 141.362591202281 43.0940158899606, 141.362044777129 43.0939430104095, 141.362342612665 43.0927913083983, 141.363324796131 43.0929307183355, 141.363864853411 43.0930055119469, 141.363757698133 43.093454852072, 141.363686605917 43.0937526329365)) ^^http://www.opengis.net/ont/geosparql#wktLiteral