メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.893439209621 38.5804076560331, 140.893115640652 38.5807965100686, 140.892241276637 38.5801997095917, 140.89234752114 38.5794441307025, 140.892476807624 38.5786609477407, 140.890508973767 38.5785228257059, 140.890715756714 38.5773211163855, 140.891372731764 38.5773735372537, 140.891217557559 38.5782323046889, 140.89318394009 38.578417008819, 140.892963610542 38.5798670817277, 140.892931672796 38.5801081006206, 140.893439209621 38.5804076560331)) ^^http://www.opengis.net/ont/geosparql#wktLiteral