メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.347520789997 43.7727859844691, 142.347765456446 43.7732451448809, 142.348000900755 43.7736241647614, 142.346590710039 43.7740225299666, 142.346373208285 43.7736620561938, 142.346112550799 43.7731986860841, 142.345800480099 43.7732899846441, 142.345632296935 43.7727947301197, 142.347263284072 43.7723790824004, 142.347520789997 43.7727859844691)) ^^http://www.opengis.net/ont/geosparql#wktLiteral