メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.316539867536 43.0523230483525, 141.316495555424 43.0526203900205, 141.315072957818 43.0520330617602, 141.315591631098 43.051619964522, 141.316016524748 43.0518878709749, 141.315603847664 43.0512071623365, 141.315748474402 43.051099121114, 141.316935954736 43.0512726772435, 141.316807434141 43.0514632758261, 141.316723911617 43.0516019172033, 141.316634677412 43.0518135831879, 141.316539867536 43.0523230483525)) ^^http://www.opengis.net/ont/geosparql#wktLiteral