Here you can find the source of CalcDistance(double lat1, double lon1, double lat2, double lon2)
| Parameter | Description |
|---|---|
| lat1 | Latitude of the first point |
| lon1 | Longitude of the first point |
| lat2 | Latitude of the second point |
| lon2 | Longitude of the second point |
public static double CalcDistance(double lat1, double lon1, double lat2, double lon2)
//package com.java2s; /*// w w w . j a v a 2 s .co m * Course Generator * Copyright (C) 2016 Pierre Delore * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ public class Main { /** * Calculate the distance between two GPS points (without the elevation) * * @param lat1 * Latitude of the first point * @param lon1 * Longitude of the first point * @param lat2 * Latitude of the second point * @param lon2 * Longitude of the second point * @return Distance in meter */ public static double CalcDistance(double lat1, double lon1, double lat2, double lon2) { double a, c, dDistance, dLat1InRad, dLong1InRad, dLat2InRad, dLong2InRad, dLongitude, dLatitude; double kEarthRadiusKms; kEarthRadiusKms = 6378.14; // 6376.5 dDistance = 0; // Double.MinValue dLat1InRad = lat1 * (Math.PI / 180.0); dLong1InRad = lon1 * (Math.PI / 180.0); dLat2InRad = lat2 * (Math.PI / 180.0); dLong2InRad = lon2 * (Math.PI / 180.0); dLongitude = dLong2InRad - dLong1InRad; dLatitude = dLat2InRad - dLat1InRad; // Intermediate result a. a = Math.pow(Math.sin(dLatitude / 2.0), 2.0) + Math.cos(dLat1InRad) * Math.cos(dLat2InRad) * Math.pow(Math.sin(dLongitude / 2.0), 2.0); // Intermediate result c (great circle distance in Radians) c = 2.0 * Math.atan2(Math.sqrt(a), Math.sqrt(1.0 - a)); // Distance. dDistance = kEarthRadiusKms * c; // Result in meter return dDistance * 1000.0; } }