メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.993270776346 43.5571326485274, 144.993126306497 43.5570344379814, 144.993012763748 43.5569572115759, 144.992659602894 43.5567263618706, 144.993397316774 43.5561166695389, 144.993440869113 43.5561388986464, 144.993753341923 43.5563510340762, 144.994032563911 43.5565335889176, 144.993270776346 43.5571326485274)) ^^http://www.opengis.net/ont/geosparql#wktLiteral