メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.366043890831 43.0845125746986, 141.365966141066 43.0848212098543, 141.365824198906 43.0853963163118, 141.364882810408 43.0852565416351, 141.364269454421 43.0851721142145, 141.364409900643 43.0846151429549, 141.364558814224 43.084036505919, 141.366109484418 43.0842485750951, 141.366043890831 43.0845125746986)) ^^http://www.opengis.net/ont/geosparql#wktLiteral