メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.226595373312 36.6914540238497, 137.227682500306 36.6915374672288, 137.227646712768 36.6919218987951, 137.227638998327 36.6922998400745, 137.226495720705 36.6922358552786, 137.226478956968 36.6922350183337, 137.224971365908 36.6921654976174, 137.225007385505 36.6920621246068, 137.225031367374 36.6919425648941, 137.225055322371 36.6917971663124, 137.225047256578 36.6917454925022, 137.225063200414 36.6916130514971, 137.225075114104 36.6914612513197, 137.225062413318 36.6913317819798, 137.226595373312 36.6914540238497)) ^^http://www.opengis.net/ont/geosparql#wktLiteral