メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.9000000 35.0750000, 134.9062500 35.0750000, 134.9062500 35.0791667, 134.9000000 35.0791667, 134.9000000 35.0750000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral