メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.61320882782 42.8358064165844, 141.613035833073 42.8357992638778, 141.612760664013 42.8354361498435, 141.612450380303 42.8350032106076, 141.612411389076 42.8350171300002, 141.611902912853 42.8342918357516, 141.61369360546 42.833691817232, 141.61427963253 42.83454420396, 141.614766217068 42.8352127478327, 141.614483796895 42.8353180845207, 141.614046301318 42.8354812866566, 141.61320882782 42.8358064165844)) ^^http://www.opengis.net/ont/geosparql#wktLiteral