メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.863135556148 43.3219011473727, 141.86259800419 43.3219735284412, 141.862315342506 43.3220213097572, 141.861848273258 43.3203352318972, 141.861421176878 43.3188225054945, 141.863538037971 43.3184808383798, 141.864044671736 43.3200659784361, 141.86452774246 43.3216873980544, 141.863433971063 43.3218600273306, 141.863135556148 43.3219011473727)) ^^http://www.opengis.net/ont/geosparql#wktLiteral