メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.994694151138 43.5522916832499, 144.99389630678 43.5517850443688, 144.994727456584 43.5511182490488, 144.994803378806 43.5510571804791, 144.995614487632 43.5515834291517, 144.995536614982 43.5516484127819, 144.994694151138 43.5522916832499)) ^^http://www.opengis.net/ont/geosparql#wktLiteral