メタデータ名 G20493015021
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.4437500 44.0750000, 142.4500000 44.0750000, 142.4500000 44.0791667, 142.4437500 44.0791667, 142.4437500 44.0750000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral