Java Distance Calculate calculateDistanceBetween(double sourceLatitude, double sourceLongitude, double destinationLatitude, double destinationLongitude)

Description

calculate Distance Between

License

BSD License

Declaration

public static double calculateDistanceBetween(double sourceLatitude, double sourceLongitude,
            double destinationLatitude, double destinationLongitude) 

Method Source Code

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

public class Main {
    private static final double DEGREES_TO_RADIANS = Math.PI / 180.0;
    public static final double EARTH_RADIUS_IN_KILOMETERS = 6373.0;

    public static double calculateDistanceBetween(double sourceLatitude, double sourceLongitude,
            double destinationLatitude, double destinationLongitude) {
        // Keeping this as it was in DME2, though there is Math.toRadians
        double sourceLatitudeRadians = sourceLatitude * DEGREES_TO_RADIANS;
        double sourceLongitudeRadians = sourceLongitude * DEGREES_TO_RADIANS;
        double destinationLatitudeRadians = destinationLatitude * DEGREES_TO_RADIANS;
        double destinationLongitudeRadians = destinationLongitude * DEGREES_TO_RADIANS;

        double deltaLatitude = destinationLatitudeRadians - sourceLatitudeRadians;
        double deltaLongitude = destinationLongitudeRadians - sourceLongitudeRadians;

        double a = Math.pow(Math.sin(deltaLatitude / 2.0), 2.0) + Math.cos(sourceLatitudeRadians)
                * Math.cos(destinationLatitudeRadians) * Math.pow(Math.sin(deltaLongitude / 2.0), 2.0);

        double c = 2.0 * Math.atan2(Math.sqrt(a), Math.sqrt(1.0 - a));
        return c * EARTH_RADIUS_IN_KILOMETERS;
    }/*from w ww.  j a v a2s . c  o  m*/
}

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