メタデータ名 indicator-C210721
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.8062500 34.5208334, 135.8125000 34.5208334, 135.8125000 34.5250000, 135.8062500 34.5250000, 135.8062500 34.5208334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral