メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.785369858299 35.4176832674523, 136.780657666049 35.4178499156627, 136.78064636208 35.4176046791072, 136.780639107516 35.4173939959164, 136.7831057619 35.4172904046329, 136.785127193966 35.4172418865963, 136.785346216472 35.4172417671551, 136.785369858299 35.4176832674523)) ^^http://www.opengis.net/ont/geosparql#wktLiteral