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Latitude/Longitude distance in Java

02.09.2009 · Christian Ullenboom

public class LongLatUtils{  /**   * Calculates the great circle distance between two points on the Earth. Uses the Haversine Formula.   *   * @param latitude1   Latitude of first location in decimal degrees.   * @param longitude1  Longitude of first location in decimal degrees.   * @param latitude2   Latitude of second location in decimal degrees.   * @param longitude2  Longitude of second location in decimal degrees.   * @return            Distance in meter.   */  public static double distance( double latitude1, double longitude1, double latitude2, double longitude2 )  {      double latitudeSin  = Math.sin( Math.toRadians(latitude2 - latitude1) / 2 );      double longitudeSin = Math.sin( Math.toRadians(longitude2 - longitude1) / 2 );      double a = latitudeSin * latitudeSin                       + Math.cos( Math.toRadians(latitude1)) * Math.cos(Math.toRadians(latitude2) ) * longitudeSin * longitudeSin;      double c = 2 * Math.atan2( Math.sqrt(a), Math.sqrt(1 - a) );      return 6378137 * c;  }  /**   * Converts latitude and longitude from degrees, minutes, and seconds in decimal degrees.   *   * @param degrees   * @param minutes   * @param seconds   * @return           Latitude and longitude in decimal degrees.   */  public static double convertDegreesMinutesSecondsToDecimalDegrees( int degrees, int minutes, int seconds )  {      return degrees + minutes/60. + seconds/3600.;  }  //        public static void main(String[] args)  //      {  //            System.out.println( convertDegreesMinutesSecondsToDecimalDegrees(38, 53, 23 ));  //          System.out.println( distance(38.898556, -77.037852, 38.897147, -77.043934));  //      }}

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