メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.046632813658 43.5645817441326, 142.046285493969 43.56498007178, 142.045972778396 43.5653677074646, 142.045868355539 43.5655544439807, 142.045700300109 43.5663635736884, 142.042402940964 43.5660828751703, 142.042458056352 43.5651340558232, 142.042526290422 43.564138141697, 142.043348488726 43.5641745599101, 142.044828748145 43.564240899665, 142.046692211137 43.5643158505545, 142.046753532278 43.5643159594538, 142.04675195044 43.5644309704755, 142.046707201268 43.5645099702636, 142.046632813658 43.5645817441326)) ^^http://www.opengis.net/ont/geosparql#wktLiteral