メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.506534474865 34.6890155074874, 135.506542195411 34.6891299161879, 135.506548076014 34.6892168506246, 135.505589013236 34.6892924065514, 135.50462631103 34.6893630097864, 135.503653738035 34.6894300438986, 135.503658529047 34.6891625724771, 135.503657581161 34.6889211372038, 135.50461929231 34.6889160365464, 135.505588686179 34.6889094098017, 135.506539145118 34.6888965008555, 135.506534474865 34.6890155074874)) ^^http://www.opengis.net/ont/geosparql#wktLiteral