メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.340923843275 43.7486570082132, 142.339851237058 43.7483363280995, 142.33863610238 43.7479509491362, 142.338252551679 43.7478301756497, 142.3384815418 43.7474279513435, 142.338744785519 43.7469965330365, 142.338954422201 43.7466278133375, 142.339167049993 43.7462569458133, 142.34079271542 43.7467376589566, 142.341349043867 43.7469155422454, 142.341862117928 43.7470750699103, 142.341551400113 43.7476297548072, 142.340923843275 43.7486570082132)) ^^http://www.opengis.net/ont/geosparql#wktLiteral