- private static final double EARTH_RADIUS = 6378.137 * 1000;
- 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;
- }