メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.76967578453 43.2065442268445, 141.769307702128 43.2069000211899, 141.769215691063 43.2068513885865, 141.768891133167 43.2071916090458, 141.768015137134 43.206736840335, 141.768316952259 43.2064097487908, 141.768645476811 43.2060473935535, 141.76967578453 43.2065442268445)) ^^http://www.opengis.net/ont/geosparql#wktLiteral