メタデータ名 GridCode4
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.1000000 35.1875000, 139.1062500 35.1875000, 139.1062500 35.1916667, 139.1000000 35.1916667, 139.1000000 35.1875000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral