メタデータ名 indicator-L6303
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.2562500 41.2833333, 141.2625000 41.2833333, 141.2625000 41.2875000, 141.2562500 41.2875000, 141.2562500 41.2833333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral