メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.959823991364 43.5486243879604, 144.960201886999 43.5488717347185, 144.960250198386 43.5488969932327, 144.959512125864 43.5495301384671, 144.9590774751 43.5492331901157, 144.958745872613 43.5490134670433, 144.959493595612 43.5484057284116, 144.959823991364 43.5486243879604)) ^^http://www.opengis.net/ont/geosparql#wktLiteral