メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.759617066145 43.1856813699026, 141.759986050659 43.1858648210883, 141.760020234895 43.1858807210529, 141.760477549183 43.186111878396, 141.760917835032 43.1863336079343, 141.760938175038 43.1863439625892, 141.760015329791 43.1873016055526, 141.759557958146 43.1870767053999, 141.759080433185 43.1868304073223, 141.758702329877 43.1866512051826, 141.758289269603 43.186426562207, 141.759212778806 43.1854600704838, 141.759617066145 43.1856813699026)) ^^http://www.opengis.net/ont/geosparql#wktLiteral