メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.317274157674 43.0809539350754, 141.317507147396 43.0811730809942, 141.317983015395 43.0816113115631, 141.317255956026 43.0820274284556, 141.316305959109 43.0825852630275, 141.316175441561 43.082460839788, 141.315847101961 43.08216446477, 141.315592785734 43.0819471811638, 141.315349078687 43.081732795952, 141.31526076763 43.0816533760263, 141.315434711052 43.0809215479967, 141.315592432758 43.0809096854855, 141.315825678162 43.0807579221412, 141.316147259735 43.080576426372, 141.316597572635 43.0803079297987, 141.317274157674 43.0809539350754)) ^^http://www.opengis.net/ont/geosparql#wktLiteral