メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.926955434503 35.4788942221851, 136.926135570148 35.4788955848334, 136.925387967328 35.4789082844853, 136.924483000229 35.4789177056432, 136.924398816671 35.4789205303824, 136.924901745106 35.4778980494207, 136.925635726016 35.4778531787791, 136.926132292301 35.4778452955218, 136.926930587903 35.4778271647958, 136.926955434503 35.4788942221851)) ^^http://www.opengis.net/ont/geosparql#wktLiteral