メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.360067482209 43.0757305164298, 141.359916540427 43.0763224321576, 141.359222069249 43.0762211011468, 141.358362483595 43.0761070823704, 141.358356643002 43.0761063328426, 141.358507425379 43.0755263052149, 141.358653116261 43.0749664222698, 141.359166605702 43.0750367416442, 141.360206566914 43.0751753605842, 141.360067482209 43.0757305164298)) ^^http://www.opengis.net/ont/geosparql#wktLiteral