メタデータ名 C21204
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.0000000 37.0041667, 138.0062500 37.0041667, 138.0062500 37.0083333, 138.0000000 37.0083333, 138.0000000 37.0041667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral