メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.906613859507 43.4714971750025, 141.906421615747 43.4714997998784, 141.906155095016 43.4715021672338, 141.905897227981 43.4715236890257, 141.905580227463 43.4715688727833, 141.90502228037 43.4716522223248, 141.904820171849 43.4710295252054, 141.905097283935 43.4709900262802, 141.905617273357 43.4709240022073, 141.9058810437 43.4708788354547, 141.906241421388 43.4708204537363, 141.906765009791 43.4707409688792, 141.906613859507 43.4714971750025)) ^^http://www.opengis.net/ont/geosparql#wktLiteral