メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.351335040536 43.0937385188211, 141.351831011269 43.093802261109, 141.352349907185 43.0938734258289, 141.35205534367 43.0950253377919, 141.35153187572 43.0949513249376, 141.351022836426 43.0948881127195, 141.350501943793 43.0948219207453, 141.350796412351 43.0936716260643, 141.351335040536 43.0937385188211)) ^^http://www.opengis.net/ont/geosparql#wktLiteral