前言:在博客上找了很多,也看了很多瀏覽度高的,但是一測試,還是有幾百米或者幾十米的誤差
於是我就借鑑幾個博客做了調整,經度度與百度手機定位幾乎一致。
借鑑博客地址:https://blog.csdn.net/coolypf/article/details/8569813
還有一個博客:找不到了,看到很多博客,都是轉載或者抄襲借鑑,暫時沒找到原文,找到了再放上來
一、84 to 火星座標系 (GCJ-02) to 百度地圖座標
/**
* @Author zr
* @Date 2019-08-29 17:03
* @Version 2.0
*/
public class BdMapUtil {
/** 圓周率 */
public static double pi = 3.1415926535897932384626;
public static double a = 6378245.0;
public static double ee = 0.00669342162296594323;
private static double x_pi = 3.14159265358979324 * 3000.0 / 180.0;
/**
* 得到百度地圖經緯度
*
* @author zr
* @date 2019-09-09
* @param lat WGS-84 gps的緯度
* @param lon WGS-84 gps的經度
* @return com.construn.vehicle.message.util.Gps
*/
public static Gps getBd09(double lat, double lon){
//得到火星座標經緯度
Gps gps = gps84ToGcj02(lat, lon);
if(gps ==null){
return null;
}
//得到百度座標經緯度
return gcj02ToBd09(gps.getWgLat(), gps.getWgLon());
}
/**
* 火星座標系 (GCJ-02)轉百度地圖座標系
*
* @author zr
* @date 2019-09-09
* @param * @param gg_lat
* @param gg_lon
* @return void
*/
private static Gps gcj02ToBd09(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 * x_pi);
double theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * 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);
}
/**
* 84 to 火星座標系 (GCJ-02)
*
* @author zr
* @date 2019-09-09
* @param * @param lat
* @param lon
* @return void
*/
private static Gps gps84ToGcj02(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);
}
/**
* 判斷有沒有超過中國區
*
* @author zr
* @date 2019-09-09
* @param * @param lat
* @param lon
* @return boolean
*/
private 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;
}
/**
* 處理緯度
*
* @author zr
* @date 2019-09-09
* @param * @param x
* @param y
* @return double
*/
private 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;
}
/**
* 處理經度
*
* @author zr
* @date 2019-09-09
* @param * @param x
* @param y
* @return double
*/
private 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;
}
}
Gps類
import lombok.Getter;
import lombok.Setter;
/**
* gps 經緯度座標類
*
* @Author zr
* @Date 2019-09-09 19:12
* @Version 2.0
*/
@Getter
@Setter
public class Gps {
private double wgLat;
private double wgLon;
public Gps() {
}
public Gps(double wgLat, double wgLon) {
setWgLat(wgLat);
setWgLon(wgLon);
}
@Override
public String toString() {
return "Gps{" +
"wgLat=" + wgLat +
", wgLon=" + wgLon +
'}';
}
}
二、說明下、百度的地圖加密原始gps地理座標是這樣的:百度地圖加密的是 火星座標系 (GCJ-02),而GCJ-02加密的是原始gps座標系。所以從原始gps座標,到百度地圖座標,順序是WGS-84 --> GCJ-02 --> BD-09