メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.376238299592 43.8273779043771, 142.375588646334 43.8272148701575, 142.375748906349 43.8270984896424, 142.37327931953 43.8253018230783, 142.375258164009 43.8238084840085, 142.375735513846 43.8241600811489, 142.37665618607 43.8248562767934, 142.377730260664 43.8256455916456, 142.376843995976 43.8262891975025, 142.376625467689 43.8264549197498, 142.376238299592 43.8273779043771)) ^^http://www.opengis.net/ont/geosparql#wktLiteral