メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.317767483056 43.0713024754851, 141.317593255473 43.0709746580455, 141.317267066822 43.0703628778289, 141.317941924404 43.0701789805983, 141.318439305227 43.0700399819446, 141.319051018827 43.070408774334, 141.319084564349 43.0704297243006, 141.318633624653 43.0707326897665, 141.317767483056 43.0713024754851)) ^^http://www.opengis.net/ont/geosparql#wktLiteral