メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.77721666567 43.2088432500319, 141.777885720378 43.2091911805999, 141.777995968578 43.209433143416, 141.777619124786 43.2098326029563, 141.776687872439 43.2094095327507, 141.776754998311 43.2093576962639, 141.77566505185 43.208818906156, 141.776182983703 43.2083151052523, 141.77721666567 43.2088432500319)) ^^http://www.opengis.net/ont/geosparql#wktLiteral