メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.914159277549 43.4973234304402, 141.912415975677 43.4975870432054, 141.912242662784 43.4969672002679, 141.913967752283 43.4966622899827, 141.914159277549 43.4973234304402)) ^^http://www.opengis.net/ont/geosparql#wktLiteral