メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.399063639528 43.7529294948574, 142.399117714648 43.7534034643854, 142.397044219894 43.7535219587385, 142.3950661174 43.753636220525, 142.395065579081 43.7536292947898, 142.394996312824 43.7531438453254, 142.394955354539 43.7526502906396, 142.396936048059 43.7525404574539, 142.39901670212 43.7524293568072, 142.399063639528 43.7529294948574)) ^^http://www.opengis.net/ont/geosparql#wktLiteral