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private const double EARTH_RADIUS = 6378.137; // 地球半径
static void Main(string[] args) { double d = GetDistance(23.154841, 113.314726, 22.535767, 114.11749); double r = rad(EARTH_RADIUS); Console.Write(d + "\r\n" + r); Console.Read(); }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))); s = s * EARTH_RADIUS; s = Math.Round(s * 10000) / 10000; return s; }来源:
http://blog.csdn.net/wsh6759/article/details/5495482
http://www.cnblogs.com/xionglee/articles/1493276.html