メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.32583700389 43.0687138266904, 141.325686081754 43.0692900085727, 141.325134302642 43.0692135274381, 141.325018754609 43.0691977522635, 141.324697669234 43.0691540105785, 141.324127302671 43.0690762489947, 141.324186578397 43.068815668212, 141.324259203545 43.0684966818278, 141.324417574662 43.0679173287394, 141.325828408713 43.0681116005996, 141.325977681221 43.0681363678369, 141.32583700389 43.0687138266904)) ^^http://www.opengis.net/ont/geosparql#wktLiteral