メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.37494476946 43.7686561700496, 142.375265971027 43.7692106078653, 142.373735798108 43.7696761151207, 142.373414576835 43.7690989219402, 142.373110432476 43.768532454427, 142.374636088949 43.7680835059191, 142.37494476946 43.7686561700496)) ^^http://www.opengis.net/ont/geosparql#wktLiteral