メタデータ名 indicator-D310307
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.0000000 38.2416667, 141.0062500 38.2416667, 141.0062500 38.2458334, 141.0000000 38.2458334, 141.0000000 38.2416667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral