メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.909315270254 43.4955935389174, 141.908356761317 43.495725424277, 141.90804765888 43.4945720994225, 141.908962895027 43.4944399418486, 141.908996031331 43.4944352941302, 141.909301497333 43.4954879374902, 141.909276727092 43.4954909584154, 141.909315270254 43.4955935389174)) ^^http://www.opengis.net/ont/geosparql#wktLiteral