メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.699914107188 44.366352141968, 141.699399896982 44.3666867808881, 141.699359807026 44.366712884092, 141.698803360617 44.3662673507078, 141.698274534126 44.3658511636288, 141.69830885853 44.3658284421776, 141.698822379744 44.3654884603653, 141.699914107188 44.366352141968)) ^^http://www.opengis.net/ont/geosparql#wktLiteral