ult) {
            //停止进度条
            stopPressBar();
            //初始化Zondy.Format.PolygonJSON类
            var format = new Zondy.Format.PolygonJSON();
            //将MapGIS要素JSON反序列化为ol.Feature类型数组
            var features = format.read(result);

            //实例化一个矢量图层drawLayerr用于高亮显示结果
            var drawSource = new ol.source.Vector({
                wrapX: false
            });
            drawSource.addFeatures(features);
