メタデータ名 indicator-C210720
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.5125000 40.5833333, 140.5187500 40.5833333, 140.5187500 40.5875000, 140.5125000 40.5875000, 140.5125000 40.5833333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral