メタデータ名 C21463-19700401
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.3437500 38.9291667, 141.3500000 38.9291667, 141.3500000 38.9333333, 141.3437500 38.9333333, 141.3437500 38.9291667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral