以下是GoogleMap的计算最短距离API:
private
final
double EARTH_RADIUS
=
6378.137
;
//地球半径
private static double rad ( double d )
{
return d * Math. PI / 180.0 ; //计算弧长
}
private static double rad ( double d )
{
return d * Math. PI / 180.0 ; //计算弧长
}
//lng1 第一个点经度,lat1第一点纬度;lng2第二点经度,lat2第二点纬度
public static double getShortestDistance ( double lng1, double lat1, double lng2, double lat2 ) {
double radLat1 = rad (Lat1 ) ;
double radLat2 = rad (Lat2 ) ;
double a = radLat1 - radLat2 ;
double b = rad (Lon1 ) - rad (Lon2 ) ;
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 = s * 1000 ; //换算成米
return s ; //得到千米数
}
public static double getShortestDistance ( double lng1, double lat1, double lng2, double lat2 ) {
double radLat1 = rad (Lat1 ) ;
double radLat2 = rad (Lat2 ) ;
double a = radLat1 - radLat2 ;
double b = rad (Lon1 ) - rad (Lon2 ) ;
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 = s * 1000 ; //换算成米
return s ; //得到千米数
}
// 测试
public static void main(String[] args) {
public static void main(String[] args) {
double lng1 = 117.10156050396506;
double lat1 = 39.12835580850143;
double lng2 = 117.09607822580763 ;
double lat2 = 39.014446251230325;
double q = getDistance(lng1, lat1, lng2, lat2);
System.out.println(q);
double lat1 = 39.12835580850143;
double lng2 = 117.09607822580763 ;
double lat2 = 39.014446251230325;
double q = getDistance(lng1, lat1, lng2, lat2);
System.out.println(q);
}