メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.402637725113 40.6994711586186, 141.403716006201 40.7000879555541, 141.406031876477 40.7017587697693, 141.405932076057 40.7025542285004, 141.404131523428 40.7024146200708, 141.40201607314 40.7022371593047, 141.402054274644 40.7017733046973, 141.402094111166 40.701311412508, 141.402140182402 40.7006861846142, 141.402164892567 40.7003908367057, 141.402413363321 40.699873527125, 141.402637725113 40.6994711586186)) ^^http://www.opengis.net/ont/geosparql#wktLiteral