メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.175179254716 42.8873847315385, 143.175837257472 42.8874283063064, 143.175671796537 42.8886449904942, 143.17501965228 42.8885910285131, 143.175017473828 42.8886051828284, 143.173389226678 42.8884833259473, 143.173452594528 42.8880696824957, 143.173513085168 42.887668229084, 143.173557210435 42.8872791453927, 143.175089957167 42.8873676577931, 143.175179254716 42.8873847315385)) ^^http://www.opengis.net/ont/geosparql#wktLiteral