メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.383499538872 43.0694784299943, 141.38187553019 43.0693320090782, 141.382163765106 43.0690141258354, 141.382496811085 43.0690354277635, 141.382631245001 43.0687874802306, 141.382598891835 43.068673582527, 141.382498380003 43.0686381480906, 141.383195104104 43.0678265477053, 141.384271896888 43.0681511107808, 141.383569300815 43.0689723769001, 141.383499538872 43.0694784299943)) ^^http://www.opengis.net/ont/geosparql#wktLiteral