メタデータ名 C2687
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.7312500 36.5041667, 139.7375000 36.5041667, 139.7375000 36.5083333, 139.7312500 36.5083333, 139.7312500 36.5041667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral