メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.907874628108 35.2817867627977, 136.906436541882 35.2820428169291, 136.90650360259 35.2808147633971, 136.906584230245 35.2792451816822, 136.906818178947 35.2794304114424, 136.907426132145 35.2799958943338, 136.907805666543 35.2803591160739, 136.908577674724 35.2810979082602, 136.909032783873 35.281532698017, 136.907874628108 35.2817867627977)) ^^http://www.opengis.net/ont/geosparql#wktLiteral