メタデータ名 indicator-C220721
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.2937500 42.5250000, 141.3000000 42.5250000, 141.3000000 42.5291667, 141.2937500 42.5291667, 141.2937500 42.5250000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral