メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.902628021055 43.4798299099695, 141.902845840445 43.4797966013929, 141.90305941889 43.480495255093, 141.902277633184 43.4806360389198, 141.902271171445 43.4806136207612, 141.902054963274 43.4799243812975, 141.901895123152 43.479337213433, 141.901721331708 43.4787752136995, 141.901783482992 43.4787657315912, 141.902293299136 43.4786878430836, 141.902424631452 43.4791614557889, 141.902628021055 43.4798299099695)) ^^http://www.opengis.net/ont/geosparql#wktLiteral