メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.046088973798 43.5706734424445, 142.04597263333 43.5706953925819, 142.045755272079 43.5707171657437, 142.045579891855 43.5707224157298, 142.045496193254 43.5706723745405, 142.045290640566 43.5705833375525, 142.044949630756 43.5705314390398, 142.044686894908 43.5704423005245, 142.044498642381 43.5703075102419, 142.045277869138 43.5698432237992, 142.045537314242 43.5697771521661, 142.046003735499 43.5705124992557, 142.046088973798 43.5706734424445)) ^^http://www.opengis.net/ont/geosparql#wktLiteral