メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.358711724164 43.7985872623549, 142.358118795659 43.7990156282739, 142.357460990696 43.7985359476411, 142.357241729263 43.798375308334, 142.356465081813 43.7978186598631, 142.356908749028 43.79748973642, 142.357114334934 43.7971861209136, 142.358853695747 43.7960308760425, 142.360528933617 43.7972429266383, 142.360163195232 43.7975016923073, 142.359932927833 43.7976646031347, 142.35979740843 43.7977630239639, 142.359440107695 43.7980158023708, 142.358711724164 43.7985872623549)) ^^http://www.opengis.net/ont/geosparql#wktLiteral