メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.402050434992 43.7905663012221, 142.402070099706 43.7905782658677, 142.402575889693 43.7908860483072, 142.402846265497 43.791050209754, 142.403634548128 43.7915422794108, 142.40247719553 43.7925256362566, 142.401686350677 43.792014347186, 142.400923909455 43.7915346941535, 142.400573589658 43.7913153062894, 142.399881698627 43.7908788201119, 142.399893530378 43.7908690653897, 142.401015770735 43.7899074398603, 142.401040697456 43.789923018111, 142.402050434992 43.7905663012221)) ^^http://www.opengis.net/ont/geosparql#wktLiteral