メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.3750000 37.0708334, 140.3812500 37.0708334, 140.3812500 37.0750000, 140.3750000 37.0750000, 140.3750000 37.0708334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral