メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.053906533308 42.9148001533088, 143.053179707303 42.9147420218142, 143.051673767024 42.9146216789704, 143.051606907519 42.9146163094795, 143.051633116628 42.9144163114866, 143.051798413028 42.9132613551522, 143.051799207983 42.9132563558873, 143.051840096802 42.9132587425944, 143.053330638577 42.9133525339098, 143.054092342754 42.9134158352098, 143.054018024458 42.9140067960939, 143.053906533308 42.9148001533088)) ^^http://www.opengis.net/ont/geosparql#wktLiteral