Java Distance Calculate calculateDistance(Double lng1, Double lat1, Double lng2, Double lat2)

Description

calculate Distance

License

Apache License

Declaration

public static Long calculateDistance(Double lng1, Double lat1, Double lng2, Double lat2) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

public class Main {
    private static final double EARTH_RADIUS = 6378137;

    public static Long calculateDistance(Double lng1, Double lat1, Double lng2, Double lat2) {
        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;//w  w  w.  j a v  a2 s.  c o  m
        return (long) s;
    }

    private static double rad(double d) {
        return d * Math.PI / 180.0;
    }
}

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9. calculateDistance(float[] vec1, float[] vec2)