メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.303746200471 43.0766398334264, 141.303884239772 43.0767655270254, 141.304005250429 43.0768756779842, 141.304263166974 43.0771105295549, 141.303753042984 43.0774046460107, 141.303477458264 43.07756103152, 141.303452069317 43.0775754382267, 141.303272118838 43.077677552987, 141.303211816619 43.0777120776561, 141.302266462638 43.0782823564338, 141.301752915307 43.0778018330278, 141.301225663061 43.0773084649096, 141.302191822817 43.076744910211, 141.302195500832 43.0767428305863, 141.30320814053 43.0761501127186, 141.303746200471 43.0766398334264)) ^^http://www.opengis.net/ont/geosparql#wktLiteral