package com.souke.fangte.util;
public class GeoUtils {
public enum GaussSphere {
Beijing54, Xian80, WGS84,
}
private static double Rad(double d) {
return d * Math.PI / 180.0;
}
public double DistanceOfTwoPoints(double lng1, double lat1, double lng2,
double lat2, GaussSphere gs) {
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
* (gs == GaussSphere.WGS84 ? 6378137.0
: (gs == GaussSphere.Xian80 ? 6378140.0 : 6378245.0));
s = Math.round(s * 10000) / 10000;
return s;
}
}