メタデータ名 freq-AF
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.0875000 34.7083333, 135.0937500 34.7083333, 135.0937500 34.7125000, 135.0875000 34.7125000, 135.0875000 34.7083333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral