distance by latitude and longitude - Java java.lang

Java examples for java.lang:long

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Description

distance by latitude and longitude

Demo Code


//package com.java2s;

public class Main {


    public static float distFrom(float lat1, float lng1, float lat2,
            float lng2) {
        double earthRadius = 6371000; //meters
        double dLat = Math.toRadians(lat2 - lat1);
        double dLng = Math.toRadians(lng2 - lng1);
        double a = Math.sin(dLat / 2) * Math.sin(dLat / 2)
                + Math.cos(Math.toRadians(lat1))
                * Math.cos(Math.toRadians(lat2)) * Math.sin(dLng / 2)
                * Math.sin(dLng / 2);
        double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
        float dist = (float) (earthRadius * c);

        return dist;
    }/* w w w  . j ava 2 s .  c  o  m*/
}

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