メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.38887761537 43.0369584591944, 141.388686112732 43.0370571698012, 141.388458665969 43.0371688322784, 141.388243263193 43.0372762233023, 141.38802179584 43.0373922203828, 141.388203272846 43.0375854477761, 141.387499125508 43.0380050836102, 141.386613196664 43.0371919988357, 141.387395245568 43.0367206283335, 141.387578276209 43.0369121804721, 141.387792584114 43.0367802367606, 141.38798807554 43.0366568013284, 141.388201892344 43.0365256264296, 141.388374551338 43.0364169281268, 141.38887761537 43.0369584591944)) ^^http://www.opengis.net/ont/geosparql#wktLiteral