メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.882416545388 43.3409578452032, 141.882728604503 43.3419803024731, 141.879342833578 43.3425211722329, 141.879163944681 43.3418967105439, 141.879159109659 43.3418797449568, 141.879041320031 43.3415111244571, 141.878966504662 43.3412769696968, 141.878703815476 43.3403565757524, 141.880071577439 43.3401021263776, 141.882047044516 43.3397602265433, 141.882416545388 43.3409578452032)) ^^http://www.opengis.net/ont/geosparql#wktLiteral