メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.770374633509 43.2064658576947, 141.770808141686 43.2066872381725, 141.770751443775 43.2067391134663, 141.770161471096 43.2073404096031, 141.769824674048 43.2076848024153, 141.768891133167 43.2071916090458, 141.769215691063 43.2068513885865, 141.769307702128 43.2069000211899, 141.76967578453 43.2065442268445, 141.769978907794 43.2062143935254, 141.770419953399 43.2064303212775, 141.770374633509 43.2064658576947)) ^^http://www.opengis.net/ont/geosparql#wktLiteral