メタデータ名 indicator-G6440
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.4187500 36.8291667, 137.4250000 36.8291667, 137.4250000 36.8333333, 137.4187500 36.8333333, 137.4187500 36.8291667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral