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Distance Calculation Using Latitude And Longitude In Java

· Java Zone

The Java Zone is brought to you in partnership with Azul Systems.   Discover how to stop tuning and get back to coding with Azul Zing.


private double distance(double lat1, double lon1, double lat2, double lon2, char unit) {
  double theta = lon1 - lon2;
  double dist = Math.sin(deg2rad(lat1)) * Math.sin(deg2rad(lat2)) + Math.cos(deg2rad(lat1)) * Math.cos(deg2rad(lat2)) * Math.cos(deg2rad(theta));
  dist = Math.acos(dist);
  dist = rad2deg(dist);
  dist = dist * 60 * 1.1515;
  if (unit == "K") {
    dist = dist * 1.609344;
  } else if (unit == "N") {
  dist = dist * 0.8684;
    }
  return (dist);
}

/*:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::*/
/*::  This function converts decimal degrees to radians             :*/
/*:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::*/
private double deg2rad(double deg) {
  return (deg * Math.PI / 180.0);
}

/*:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::*/
/*::  This function converts radians to decimal degrees             :*/
/*:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::*/
private double rad2deg(double rad) {
  return (rad * 180.0 / Math.PI);
}

system.println(distance(32.9697, -96.80322, 29.46786, -98.53506, "M") + " Miles\n");
system.println(distance(32.9697, -96.80322, 29.46786, -98.53506, "K") + " Kilometers\n");
system.println(distance(32.9697, -96.80322, 29.46786, -98.53506, "N") + " Nautical Miles\n");




The Java Zone is brought to you in partnership with Azul Systems.   Discover how to stop tuning and get back to coding with Azul Zing.

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