メタデータ名 C21421
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.5750000 35.2958334, 139.5812500 35.2958334, 139.5812500 35.3000000, 139.5750000 35.3000000, 139.5750000 35.2958334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral