メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.187290260441 42.9548081424362, 143.187286305391 42.9548377841344, 143.187181453449 42.9556262696071, 143.187152122623 42.9558956628687, 143.184927144305 42.9557388194131, 143.185224149736 42.953233201777, 143.185503427599 42.9532516744227, 143.187470159016 42.9533874077317, 143.187400900999 42.9539027913752, 143.187298084559 42.9547494935019, 143.187290260441 42.9548081424362)) ^^http://www.opengis.net/ont/geosparql#wktLiteral