メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.383714442093 43.7689045131615, 142.382326887573 43.7691713994343, 142.381953349701 43.768526254733, 142.382038062136 43.7685159254641, 142.382569447042 43.7683774344551, 142.383614886333 43.7683103212562, 142.383714442093 43.7689045131615)) ^^http://www.opengis.net/ont/geosparql#wktLiteral