メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.321375177151 43.0662931613152, 141.322013803839 43.0663777488975, 141.321847901402 43.0669971954345, 141.321689369906 43.0675602267959, 141.321286106706 43.0675026567777, 141.320629384658 43.0674094136193, 141.320771774791 43.0668548312969, 141.320721972059 43.0663169037144, 141.320727903626 43.0662101222376, 141.321375177151 43.0662931613152)) ^^http://www.opengis.net/ont/geosparql#wktLiteral