メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.413937437907 33.1843585044595, 130.413774329549 33.1841049892861, 130.413690688261 33.1839834084117, 130.413520294438 33.1835844548423, 130.414098223613 33.1834106139534, 130.414424890409 33.1841530799098, 130.413937437907 33.1843585044595)) ^^http://www.opengis.net/ont/geosparql#wktLiteral