如何获取两个经纬度点之间的中心点的经纬度

export function getCenterLonLat(oneLon, oneLat, twoLon, twoLat) {
	//oneLon：第一个点的经度；oneLat：第一个点的纬度；twoLon：第二个点的经度；twoLat：第二个点的纬度；
    let aLon = 0, aLat = 0;
    let bLon = Number(oneLon) - Number(twoLon);
    let bLat = Number(oneLat) - Number(twoLat);
    //Math.abs()绝对值
    if( bLon > 0){
        aLon = Number(oneLon) - Math.abs(bLon) / 2;
    }else{
        aLon = Number(twoLon) - Math.abs(bLon) / 2;
    }
    if( bLat > 0){
        aLat = Number(oneLat) - Math.abs(bLat) / 2;
    }else{
        aLat = Number(twoLat) - Math.abs(bLat) / 2;
    }
    return [aLon, aLat];
}