Java tutorial
//package com.java2s; public class Main { public static double[] getGaoDePos(double[] baiDu) { double X_PI = 3.14159265358979324 * 3000.0 / 180.0; double x = baiDu[0] - 0.0065, y = baiDu[1] - 0.006; double z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * X_PI); double theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * X_PI); double[] gaode = new double[2]; gaode[0] = z * Math.cos(theta); gaode[1] = z * Math.sin(theta); return gaode; } }