メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.094999769051 39.7481061681444, 140.093845059221 39.748013731384, 140.092797704391 39.7479416373697, 140.092836358667 39.7474134763689, 140.09471078758 39.7475512547529, 140.094999769051 39.7481061681444)) ^^http://www.opengis.net/ont/geosparql#wktLiteral