メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.1000000 36.3625000, 139.1062500 36.3625000, 139.1062500 36.3666667, 139.1000000 36.3666667, 139.1000000 36.3625000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral