メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.882885213232 43.3424897037761, 141.882913261144 43.3425522457798, 141.883031626951 43.3429885939381, 141.879643949637 43.3435107545045, 141.879495951581 43.3430107324802, 141.879373606956 43.3426419558486, 141.879342833578 43.3425211722329, 141.882728604503 43.3419803024731, 141.882885213232 43.3424897037761)) ^^http://www.opengis.net/ont/geosparql#wktLiteral