メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.403498527564 43.0668734314288, 141.40409804733 43.0671945586103, 141.404715175273 43.0675122261961, 141.404015550661 43.0682138727665, 141.403417473678 43.0678987342125, 141.403094602693 43.0677374702821, 141.402806775549 43.0675810370285, 141.402142087108 43.0672419084363, 141.402818240397 43.0665179450809, 141.403498527564 43.0668734314288)) ^^http://www.opengis.net/ont/geosparql#wktLiteral