メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.124504256073 42.9735776793645, 144.124311314468 42.9737840900622, 144.122655109498 42.9729926496768, 144.121570485912 42.9724718171076, 144.123217951725 42.9705970386541, 144.124278225211 42.9712249438673, 144.125590870821 42.9720006129904, 144.125806748063 42.9721332309023, 144.125170974803 42.9728569259973, 144.124563363486 42.9735119383116, 144.124504256073 42.9735776793645)) ^^http://www.opengis.net/ont/geosparql#wktLiteral