メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.602130868431 43.303775069136, 144.600505051826 43.3041686402515, 144.600121192618 43.3029640156436, 144.600840947315 43.3027814231944, 144.601569734013 43.3025984999544, 144.601809476975 43.3030821041476, 144.602130868431 43.303775069136)) ^^http://www.opengis.net/ont/geosparql#wktLiteral