Here you can find the source of calcDistance(double lon1, double lat1, double lon2, double lat2)
| Parameter | Description |
|---|---|
| lon1 | a parameter |
| lat1 | a parameter |
| lon2 | a parameter |
| lat2 | a parameter |
public static double calcDistance(double lon1, double lat1, double lon2, double lat2)
//package com.java2s; /*---------------------------------------------------------------------------- This file is part of deegree, http://deegree.org/ Copyright (C) 2001-2009 by:/* w ww . ja va 2 s .c o m*/ Department of Geography, University of Bonn and lat/lon GmbH This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Contact information: lat/lon GmbH Aennchenstr. 19, 53177 Bonn Germany http://lat-lon.de/ Department of Geography, University of Bonn Prof. Dr. Klaus Greve Postfach 1147, 53001 Bonn Germany http://www.geographie.uni-bonn.de/deegree/ e-mail: info@deegree.org ----------------------------------------------------------------------------*/ public class Main { /** * calculates the distance in meters between two points in EPSG:4326 coodinates. this is a convenience method * assuming the world is a ball * * @param lon1 * @param lat1 * @param lon2 * @param lat2 * @return the distance in meters between two points in EPSG:4326 coords */ public static double calcDistance(double lon1, double lat1, double lon2, double lat2) { double r = 6378.137; double rad = Math.PI / 180d; double cose = Math.sin(rad * lon1) * Math.sin(rad * lon2) + Math.cos(rad * lon1) * Math.cos(rad * lon2) * Math.cos(rad * (lat1 - lat2)); double dist = r * Math.acos(cose) * Math.cos(rad * Math.min(lat1, lat2)); // * 0.835 is just an heuristic correction factor return dist * 1000 * 0.835; } }