メタデータ名 C15421-19700401
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.0062500 40.9250000, 141.0125000 40.9250000, 141.0125000 40.9291667, 141.0062500 40.9291667, 141.0062500 40.9250000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral