メタデータ名 G20503251473
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.9750000 42.5750000, 141.9812500 42.5750000, 141.9812500 42.5791667, 141.9750000 42.5791667, 141.9750000 42.5750000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral