Java Distance Calculate distance(double latA, double logA, double latB, double logB)

Description

distance

License

Open Source License

Declaration

public static double distance(double latA, double logA, double latB, double logB) 

Method Source Code

//package com.java2s;

public class Main {
    private static final double PI = 3.14159265358979324D;

    public static double distance(double latA, double logA, double latB, double logB) {
        double earthR = 6371000;
        double x = Math.cos(latA * Math.PI / 180) * Math.cos(latB * Math.PI / 180)
                * Math.cos((logA - logB) * Math.PI / 180);
        double y = Math.sin(latA * Math.PI / 180) * Math.sin(latB * Math.PI / 180);
        double s = x + y;
        if (s > 1)
            s = 1;//from   w w w.  j ava 2s . co  m
        if (s < -1)
            s = -1;
        double alpha = Math.acos(s);
        double distance = alpha * earthR;
        return distance;
    }
}

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