メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.86194957031 43.3375425499699, 141.861922355207 43.337476913101, 141.861748780819 43.3369196914659, 141.861677701254 43.3366790047896, 141.862382116597 43.33656865199, 141.862383436942 43.3365732275672, 141.862633152653 43.3374213660239, 141.86194957031 43.3375425499699)) ^^http://www.opengis.net/ont/geosparql#wktLiteral