メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.870737185598 43.0074570617386, 142.870543557766 43.0073474110378, 142.870458255924 43.0072984309474, 142.870213385903 43.0071578311544, 142.870559085632 43.0068387749554, 142.870784949105 43.0069332705978, 142.870871392109 43.0069385000449, 142.871288553528 43.0069640904368, 142.870737185598 43.0074570617386)) ^^http://www.opengis.net/ont/geosparql#wktLiteral