百度地图API位置偏移的校准算法1

百度地图API位置偏移的校准算法2

百度地图API位置偏移的校准算法3

package cn.wangbaiyuan.translate.tools;/*** 各地图API坐标系统比较与转换;* WGS84坐标系：即地球坐标系，国际上通用的坐标系。设备一般包含GPS芯片或者北斗芯片获取的经纬度为WGS84地理坐标系,* 谷歌地图采用的是WGS84地理坐标系（中国范围除外）;* GCJ02坐标系：即火星坐标系，是由中国国家测绘局制订的地理信息系统的坐标系统。由WGS84坐标系经加密后的坐标系。* 谷歌中国地图和搜搜中国地图采用的是GCJ02地理坐标系; BD09坐标系：即百度坐标系，GCJ02坐标系经加密后的坐标系;* 搜狗坐标系、图吧坐标系等，估计也是在GCJ02基础上加密而成的。 chenhua*/
public class PositionUtil {public static final String BAIDU_LBS_TYPE = "bd09ll";public static double pi = 3.1415926535897932384626;public static double a = 6378245.0;public static double ee = 0.00669342162296594323;/*** 84 to 火星坐标系 (GCJ-02) World Geodetic System ==> Mars Geodetic System** @param lat* @param lon* @return*/public static Gps gps84_To_Gcj02(double lat, double lon) {if (outOfChina(lat, lon)) {return null;}double dLat = transformLat(lon - 105.0, lat - 35.0);double dLon = transformLon(lon - 105.0, lat - 35.0);double radLat = lat / 180.0 * 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) * pi);dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);double mgLat = lat + dLat;double mgLon = lon + dLon;return new Gps(mgLat, mgLon);}/*** * 火星坐标系 (GCJ-02) to 84 * * @param lon * @param lat * @return* */public static Gps gcj_To_Gps84(double lat, double lon) {Gps gps = transform(lat, lon);double lontitude = lon * 2 - gps.getWgLon();double latitude = lat * 2 - gps.getWgLat();return new Gps(latitude, lontitude);}/*** 火星坐标系 (GCJ-02) 与百度坐标系 (BD-09) 的转换算法 将 GCJ-02 坐标转换成 BD-09 坐标** @param gg_lat* @param gg_lon*/public static Gps gcj02_To_Bd09(double gg_lat, double gg_lon) {double x = gg_lon, y = gg_lat;double z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * pi);double theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * pi);double bd_lon = z * Math.cos(theta) + 0.0065;double bd_lat = z * Math.sin(theta) + 0.006;return new Gps(bd_lat, bd_lon);}/*** * 火星坐标系 (GCJ-02) 与百度坐标系 (BD-09) 的转换算法 * * 将 BD-09 坐标转换成GCJ-02 坐标 * * @param* bd_lat * @param bd_lon * @return*/public static Gps bd09_To_Gcj02(double bd_lat, double bd_lon) {double x = bd_lon - 0.0065, y = bd_lat - 0.006;double z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * pi);double theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * pi);double gg_lon = z * Math.cos(theta);double gg_lat = z * Math.sin(theta);return new Gps(gg_lat, gg_lon);}/*** (BD-09)-->84* @param bd_lat* @param bd_lon* @return*/public static Gps bd09_To_Gps84(double bd_lat, double bd_lon) {Gps gcj02 = PositionUtil.bd09_To_Gcj02(bd_lat, bd_lon);Gps map84 = PositionUtil.gcj_To_Gps84(gcj02.getWgLat(),gcj02.getWgLon());return map84;}public static boolean outOfChina(double lat, double lon) {if (lon < 72.004 || lon > 137.8347)return true;if (lat < 0.8293 || lat > 55.8271)return true;return false;}public static Gps transform(double lat, double lon) {if (outOfChina(lat, lon)) {return new Gps(lat, lon);}double dLat = transformLat(lon - 105.0, lat - 35.0);double dLon = transformLon(lon - 105.0, lat - 35.0);double radLat = lat / 180.0 * 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) * pi);dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);double mgLat = lat + dLat;double mgLon = lon + dLon;return new Gps(mgLat, mgLon);}public static double transformLat(double x, double y) {double ret = -100.0 + 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 * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0;ret += (20.0 * Math.sin(y * pi) + 40.0 * Math.sin(y / 3.0 * pi)) * 2.0 / 3.0;ret += (160.0 * Math.sin(y / 12.0 * pi) + 320 * Math.sin(y * 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 * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0;ret += (20.0 * Math.sin(x * pi) + 40.0 * Math.sin(x / 3.0 * pi)) * 2.0 / 3.0;ret += (150.0 * Math.sin(x / 12.0 * pi) + 300.0 * Math.sin(x / 30.0* pi)) * 2.0 / 3.0;return ret;}public static void main(String[] args) {// 北斗芯片获取的经纬度为WGS84地理坐标 31.426896,119.496145Gps gps = new Gps(31.426896, 119.496145);System.out.println("gps :" + gps);Gps gcj = gps84_To_Gcj02(gps.getWgLat(), gps.getWgLon());System.out.println("gcj :" + gcj);Gps star = gcj_To_Gps84(gcj.getWgLat(), gcj.getWgLon());System.out.println("star:" + star);Gps bd = gcj02_To_Bd09(gcj.getWgLat(), gcj.getWgLon());System.out.println("bd  :" + bd);Gps gcj2 = bd09_To_Gcj02(bd.getWgLat(), bd.getWgLon());System.out.println("gcj :" + gcj2);}
}

#include   const double x_pi = 3.14159265358979324 * 3000.0 / 180.0;  void bd_encrypt(double gg_lat, double gg_lon, double &bd_lat, double &bd_lon)
{  double x = gg_lon, y = gg_lat;  double z = sqrt(x * x + y * y) + 0.00002 * sin(y * x_pi);  double theta = atan2(y, x) + 0.000003 * cos(x * x_pi);  bd_lon = z * cos(theta) + 0.0065;  bd_lat = z * sin(theta) + 0.006;
}  void bd_decrypt(double bd_lat, double bd_lon, double &gg_lat, double &gg_lon)
{  double x = bd_lon - 0.0065, y = bd_lat - 0.006;  double z = sqrt(x * x + y * y) - 0.00002 * sin(y * x_pi);  double theta = atan2(y, x) - 0.000003 * cos(x * x_pi);  gg_lon = z * cos(theta);  gg_lat = z * sin(theta);
}