Java tutorial
//package com.java2s; /* * wardrive4 - android wardriving application (remake for the ICS) * Copyright (C) 2012 Raffaele Ragni * https://github.com/raffaeleragni/android-wardrive4 * * 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 { private static final double EARTH_RADIUS = 6371; /** * Converts to Cartesian points * * @param lat latitude * @param lon longitude * * @return point in x,y,z */ private static double[] latlon2cartesian(double lat, double lon) { return new double[] { Math.cos(lon) * Math.cos(lat) * EARTH_RADIUS, Math.sin(lon) * Math.cos(lat) * EARTH_RADIUS, Math.sin(lat) * EARTH_RADIUS }; } }