メタデータ名 indicator-J230131
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.1062500 41.8583333, 141.1125000 41.8583333, 141.1125000 41.8625000, 141.1062500 41.8625000, 141.1062500 41.8583333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral