WGS84，GCJ02， BD09坐标转换

转自： http://blog.csdn.net/ma969070578/article/details/41013547
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public class Gps {

private double wgLat;

private double wgLon;

public Gps(double wgLat, double wgLon) {

setWgLat(wgLat);

setWgLon(wgLon);

}

public double getWgLat() {

return wgLat;

}

public void setWgLat(double wgLat) {

this.wgLat = wgLat;

}

public double getWgLon() {

return wgLon;

}

public void setWgLon(double wgLon) {

this.wgLon = wgLon;

}

@Override

public String toString() {

return wgLat + "," + wgLon;

}

}

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/**

* 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 31.426896,119.496145

Gps 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);

}

}