ar mapDocLayer, map

            /** 初始化地图显示*/
            function init() {
                //初始化地图容器
                map = new ol.Map({
                    target: 'mapCon',
                    view: new ol.View({
                        center: [(108.34341 + 116.150939561213) / 2, (29.0125822276524 + 33.2932017737021) / 2],
                        zoom: 7,
                        projection: 'EPSG:4326',
                    }),
                })
                var { protocol