メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.997557460318 43.5518943475805, 144.996985954563 43.551517860164, 144.997006453094 43.5515008777038, 144.997615547335 43.5510331286132, 144.997770901568 43.5509116770607, 144.997853374291 43.5509648579096, 144.998331286864 43.5512902562167, 144.998204148583 43.5514028370923, 144.997557460318 43.5518943475805)) ^^http://www.opengis.net/ont/geosparql#wktLiteral