メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.421067679226 43.7518738637918, 142.421204350288 43.7518701101046, 142.422411047326 43.7518189628104, 142.423472594113 43.7517746132135, 142.424068223907 43.75174804593, 142.424117923754 43.7526159431485, 142.423569468303 43.7526466935144, 142.422496135175 43.7526953530031, 142.421295161245 43.7527765579246, 142.420620832577 43.7528221411974, 142.420583649328 43.7523009546332, 142.420577828408 43.7522193206638, 142.420530923381 43.7518884946503, 142.421067679226 43.7518738637918)) ^^http://www.opengis.net/ont/geosparql#wktLiteral