Approximate the distance between to coordinates in meters. This method is an approximation only, it does NOT calculate the real arc length - Java java.lang

Java examples for java.lang:Math Geometry Distance

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Description

Approximate the distance between to coordinates in meters. This method is an approximation only, it does NOT calculate the real arc length

Demo Code



public class Main{
    /**// w  w w  .  jav a  2s  . com
     * Approximate the distance between to coordinates in meters.<br>
     * <br>
     * 
     * <b>This method is an approximation only, it does NOT calculate the real
     * arc length</b>
     * 
     * @param c1
     * @param c2
     * @return
     */
    public static double getDistanceMetersApprox(final Coordinates c1,
            final Coordinates c2) {
        final double R = 6378.137;

        double dLong = (c1.getLongtiude() - c2.getLongtiude()) * Math.PI
                / 180.0;
        double dLat = (c1.getLatitude() - c2.getLatitude()) * Math.PI
                / 180.0;

        double a = Math.sin(dLong / 2) * Math.sin(dLat / 2)
                + Math.cos(c1.getLatitude() * Math.PI / 180.0)
                * Math.cos(c2.getLatitude() * Math.PI / 180.0);
        double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
        double d = R * c;
        return d * 1000.0;
    }
}

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