メタデータ名 indicator-C210704
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.5062500 35.8208334, 139.5125000 35.8208334, 139.5125000 35.8250000, 139.5062500 35.8250000, 139.5062500 35.8208334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral