メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.042783724625 43.5690294637676, 142.043115183331 43.5690882445093, 142.043155021629 43.5690912334137, 142.042872598293 43.5698057251985, 142.04274871145 43.5698041347346, 142.042390596132 43.5697397141116, 142.041846211631 43.5696245029426, 142.042134119749 43.5688662459253, 142.042783724625 43.5690294637676)) ^^http://www.opengis.net/ont/geosparql#wktLiteral