メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.0937500 36.0750000, 140.1000000 36.0750000, 140.1000000 36.0791667, 140.0937500 36.0791667, 140.0937500 36.0750000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral