メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.454800043799 43.5045179460555, 144.453034096544 43.5067010552435, 144.454824127691 43.5074366047952, 144.453234003741 43.5096424487156, 144.44827907061 43.507630293289, 144.45005707247 43.5054969880172, 144.451819470615 43.5033417001185, 144.453633118131 43.5011750979807, 144.456484686207 43.5024291753375, 144.454800043799 43.5045179460555)) ^^http://www.opengis.net/ont/geosparql#wktLiteral