メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.354048807706 44.483471802375, 142.355193627163 44.4837591745441, 142.354640400955 44.484917386118, 142.3534692854 44.4846267268832, 142.35250006915 44.4843861471208, 142.353036616687 44.4832177307969, 142.354048807706 44.483471802375)) ^^http://www.opengis.net/ont/geosparql#wktLiteral