メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.423569468303 43.7526466935144, 142.424117923754 43.7526159431485, 142.424167565106 43.7534582037285, 142.424225879618 43.7539976601266, 142.423614006442 43.7540347995091, 142.422627487333 43.7540815519329, 142.420773121745 43.754192961784, 142.420713876854 43.7536548242615, 142.420711635591 43.7536344002785, 142.420669198734 43.7532325374389, 142.420620832577 43.7528221411974, 142.421295161245 43.7527765579246, 142.422496135175 43.7526953530031, 142.423569468303 43.7526466935144)) ^^http://www.opengis.net/ont/geosparql#wktLiteral