adian(this, 'fovV', viewshed, 'fovV'));
                    tileset1.flyTo();
                }

                this._earth = earth;
            },
            filters: {
                numFilter(value) {
                    // 截取当前数据到小数点后两位
                    let realVal = parseFloat(value).toFixed(2)
                    return realVal
                },
                numFilter2(value) {
                    // 截取当前数据到小数点后五位
                    let re