メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.337655704039 43.1062852123307, 141.337949849305 43.106631183776, 141.33774751879 43.1067211336325, 141.337287969426 43.1069263398413, 141.33668190917 43.1071969620987, 141.336431811945 43.106897193562, 141.336383646697 43.1068313333483, 141.336030233382 43.1064244010512, 141.336799252761 43.1060640059863, 141.337282641847 43.1058437352624, 141.337449357407 43.1060446583858, 141.337655704039 43.1062852123307)) ^^http://www.opengis.net/ont/geosparql#wktLiteral