根据经纬度计算地球🌍两点距离公式推导

据说是Google Maps中计算的逻辑(C#):

private const double EARTH_RADIUS = 6378.137; 
private static double rad(double d) { return d * Math.PI / 180.0; } 
public static double GetDistance(double lat1, double lng1, double lat2, double lng2) { 
    double radLat1 = rad(lat1); 
    double radLat2 = rad(lat2); 
    double a = radLat1 - radLat2; 
    double b = rad(lng1) - rad(lng2); 
    double s = 2 * Math.Asin(Math.Sqrt(Math.Pow(Math.Sin(a / 2), 2) + Math.Cos(radLat1) * Math.Cos(radLat2) * Math.Pow(Math.Sin(b / 2), 2)));  // 原文链接http://www.hijtr.com/csharp-gps2dis/
    s = s * EARTH_RADIUS; 
    s = Math.Round(s * 10000) / 10000*1000; 
    return s; 
}

还原其中计算公式:

formula
deduct

推荐阅读更多精彩内容