メタデータ名 C2903
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.5062500 37.4833333, 139.5125000 37.4833333, 139.5125000 37.4875000, 139.5062500 37.4875000, 139.5062500 37.4833333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral