メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.406695937171 43.7532491323277, 142.407176944656 43.7529794280724, 142.407209806171 43.7534640409058, 142.407263708275 43.7539448265357, 142.406574124296 43.7539763009955, 142.405208183246 43.7540716374115, 142.405066223409 43.7541443298929, 142.404955480631 43.7540719767482, 142.404434354116 43.7541031941631, 142.403230983768 43.7541788640402, 142.403167184585 43.7536805083365, 142.403113080679 43.7532030422383, 142.404831902057 43.7531066256689, 142.406447872479 43.7530090399908, 142.406479481847 43.7530166256645, 142.406695937171 43.7532491323277)) ^^http://www.opengis.net/ont/geosparql#wktLiteral