メタデータ名 C4607
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.6062500 44.8291667, 142.6125000 44.8291667, 142.6125000 44.8333333, 142.6062500 44.8333333, 142.6062500 44.8291667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral