メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.345082507682 43.0562102549295, 141.344944416737 43.0567895221158, 141.344870127765 43.0570932507011, 141.34479961843 43.0573812552837, 141.344424267398 43.0573267313779, 141.343240025856 43.0571549562672, 141.343374111063 43.0566078696082, 141.343422686895 43.056585186601, 141.343574188267 43.056014467369, 141.345082507682 43.0562102549295)) ^^http://www.opengis.net/ont/geosparql#wktLiteral