メタデータ名 C21521-19700401
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.1687500 34.9791667, 137.1750000 34.9791667, 137.1750000 34.9833333, 137.1687500 34.9833333, 137.1687500 34.9791667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral