メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.83511133419 40.8218522930093, 140.835105134207 40.8230113660306, 140.832526100988 40.8230033178347, 140.832532435091 40.8218277843027, 140.832538821122 40.8206432411525, 140.832738867912 40.8206438787673, 140.832868510923 40.8206443023907, 140.835117762309 40.8206512870052, 140.83511133419 40.8218522930093)) ^^http://www.opengis.net/ont/geosparql#wktLiteral