メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.284689008306 43.1518127494175, 141.285511064408 43.1524160627993, 141.286019490276 43.1528006127381, 141.28555304805 43.1531422748538, 141.284367774909 43.1540105367583, 141.283846096294 43.153619679581, 141.283414142082 43.1532960335906, 141.283015798841 43.1529975661402, 141.282589389951 43.1526822628501, 141.282163181361 43.152354512267, 141.283397071328 43.1514964050639, 141.283861627631 43.151188639167, 141.284262787181 43.1514850117147, 141.284689008306 43.1518127494175)) ^^http://www.opengis.net/ont/geosparql#wktLiteral