メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.228357434757 36.6904444982514, 137.228489448335 36.6904502733559, 137.228639196243 36.6904564626801, 137.228658085654 36.6904572279078, 137.229458614643 36.690490040511, 137.229439098665 36.6911456671953, 137.229401491743 36.6917337139599, 137.228661405435 36.6917275515039, 137.228662221278 36.6916015268135, 137.227682500306 36.6915374672288, 137.227718226729 36.6910755188866, 137.227766827954 36.6906658040816, 137.22779601285 36.6904197228178, 137.228357434757 36.6904444982514)) ^^http://www.opengis.net/ont/geosparql#wktLiteral