メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.062643456948 37.8763587370344, 139.061156921069 37.8760807815826, 139.060944736978 37.8759781805608, 139.060729415665 37.8760711464575, 139.060866900254 37.8757562534909, 139.060985051897 37.8754856592204, 139.061215211457 37.8748262409882, 139.061595085642 37.8740250336544, 139.062764859249 37.8743264648747, 139.063714226077 37.8745988195932, 139.063804687455 37.8746180927443, 139.062643456948 37.8763587370344)) ^^http://www.opengis.net/ont/geosparql#wktLiteral