百度坐标转换gps坐标工具类

package com.smarteye.baidumap; import com.baidu.location.BDLocation; public class GlobalTool { public final static double a = 6378245.0; public final static double ee = 0.00669342162296594323; // 判断坐标是不是在中国 public static boolean outOfChina(BDLocation bdLocation) { double lat = bdLocation.getLatitude(); double lon = bdLocation.getLongitude(); if (lon < 72.004 || lon > 137.8347) return true; if (lat < 0.8293 || lat > 55.8271) return true; if ((119.962 < lon && lon < 121.750) && (21.586 < lat && lat < 25.463)) return true; return false; } public final static double x_pi = 3.14159265358979324 * 3000.0 / 180.0; public static BDLocation BAIDU_to_WGS84(BDLocation bdLocation) { if (outOfChina(bdLocation)) { return bdLocation; } double x = bdLocation.getLongitude() - 0.0065; double y = bdLocation.getLatitude() - 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); bdLocation.setLongitude(z * Math.cos(theta)); bdLocation.setLatitude(z * Math.sin(theta)); return GCJ02_to_WGS84(bdLocation); } public static BDLocation GCJ02_to_WGS84(BDLocation bdLocation) { if (outOfChina(bdLocation)) { return bdLocation; } BDLocation tmpLocation = new BDLocation(); tmpLocation.setLatitude(bdLocation.getLatitude()); tmpLocation.setLongitude(bdLocation.getLongitude()); BDLocation tmpLatLng = WGS84_to_GCJ02(tmpLocation); double tmpLat = 2 * bdLocation.getLatitude() - tmpLatLng.getLatitude(); double tmpLng = 2 * bdLocation.getLongitude() - tmpLatLng.getLongitude(); for (int i = 0; i < 0; ++i) { tmpLocation.setLatitude(bdLocation.getLatitude()); tmpLocation.setLongitude(bdLocation.getLongitude()); tmpLatLng = WGS84_to_GCJ02(tmpLocation); tmpLat = 2 * tmpLat - tmpLatLng.getLatitude(); tmpLng = 2 * tmpLng - tmpLatLng.getLongitude(); } bdLocation.setLatitude(tmpLat); bdLocation.setLongitude(tmpLng); return bdLocation; } public static BDLocation WGS84_to_GCJ02(BDLocation bdLocation) { if (outOfChina(bdLocation)) { return bdLocation; } double dLat = transformLat(bdLocation.getLongitude() - 105.0, bdLocation.getLatitude() - 35.0); double dLon = transformLon(bdLocation.getLongitude() - 105.0, bdLocation.getLatitude() - 35.0); double radLat = bdLocation.getLatitude() / 180.0 * Math.PI; double magic = Math.sin(radLat); magic = 1 - ee * magic * magic; double sqrtMagic = Math.sqrt(magic); dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * Math.PI); dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * Math.PI); bdLocation.setLatitude(bdLocation.getLatitude() + dLat); bdLocation.setLongitude(bdLocation.getLongitude() + dLon); return bdLocation; } public static double transformLat(double x, double y) { double ret = ⑴00.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * Math.sqrt(Math.abs(x)); ret += (20.0 * Math.sin(6.0 * x * Math.PI) + 20.0 * Math.sin(2.0 * x * Math.PI)) * 2.0 / 3.0; ret += (20.0 * Math.sin(y * Math.PI) + 40.0 * Math.sin(y / 3.0 * Math.PI)) * 2.0 / 3.0; ret += (160.0 * Math.sin(y / 12.0 * Math.PI) + 320 * Math.sin(y * Math.PI / 30.0)) * 2.0 / 3.0; return ret; } public static double transformLon(double x, double y) { double ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * Math.sqrt(Math.abs(x)); ret += (20.0 * Math.sin(6.0 * x * Math.PI) + 20.0 * Math.sin(2.0 * x * Math.PI)) * 2.0 / 3.0; ret += (20.0 * Math.sin(x * Math.PI) + 40.0 * Math.sin(x / 3.0 * Math.PI)) * 2.0 / 3.0; ret += (150.0 * Math.sin(x / 12.0 * Math.PI) + 300.0 * Math.sin(x / 30.0 * Math.PI)) * 2.0 / 3.0; return ret; } }