メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.182541171841 34.234205659084, 135.181664373364 34.2341369797611, 135.181713119611 34.2337431528924, 135.182602274207 34.2338051538498, 135.182541171841 34.234205659084)) ^^http://www.opengis.net/ont/geosparql#wktLiteral