メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.286215537163 43.0820446392334, 141.286229320763 43.082059031728, 141.286610626224 43.0824073461899, 141.286971930578 43.0827525366183, 141.287404025421 43.0831483251347, 141.286889558123 43.0834416313532, 141.286632240135 43.0831955648728, 141.286462816071 43.0830472218704, 141.286392397609 43.0829732763452, 141.286097799631 43.0827124077513, 141.285695651398 43.0823471784038, 141.284765680403 43.0815005970549, 141.28529708912 43.0811850781786, 141.286215537163 43.0820446392334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral