heckbox; //地学测量方式选择的Div对象
        var tdk = "4c27d6e0e8a90715b23a989d42272fd8";   //天地图密钥
        function init() {
            //初始化地图容器
            map = new ol.Map({
                target: 'mapCon',     //地图容器div的ID
                controls: ol.control.defaults({
                    attributionOptions: ({
                        collapsible: true
                    })
                }),
                view: new ol.View({
                    cent