原始GPS坐标（WGS-84）转成百度的经纬度，零误差

刺骨的言语ヽ痛彻心扉 2024-04-18 17:26 69阅读 0赞

**前言：**在博客上找了很多，也看了很多浏览度高的，但是一测试，还是有几百米或者几十米的误差

于是我就借鉴几个博客做了调整，经度度与百度手机定位几乎一致。

**借鉴博客地址：**[https://blog.csdn.net/coolypf/article/details/8569813][https_blog.csdn.net_coolypf_article_details_8569813]

还有一个博客：找不到了，看到很多博客，都是转载或者抄袭借鉴，暂时没找到原文，找到了再放上来

一、84 to 火星坐标系 (GCJ-02) to 百度地图坐标

/**
     * @Author zr
     * @Date 2019-08-29 17:03
     * @Version 2.0
     */
    public class BdMapUtil {
        /** 圆周率 */
        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;
    
        /**
         * 得到百度地图经纬度
         *
         * @author zr
         * @date 2019-09-09
         * @param lat WGS-84 gps的纬度
         * @param lon WGS-84 gps的经度
         * @return com.construn.vehicle.message.util.Gps
         */
        public static Gps getBd09(double lat, double lon){
            //得到火星坐标经纬度
            Gps gps = gps84ToGcj02(lat, lon);
            if(gps ==null){
                return null;
            }
            //得到百度坐标经纬度
            return gcj02ToBd09(gps.getWgLat(), gps.getWgLon());
        }
        /**
         * 火星坐标系 (GCJ-02)转百度地图坐标系
         *
         * @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 火星坐标系 (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);
        }
    
        /**
         * 判断有没有超过中国区
         *
         * @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;
        }
    
        /**
         * 处理纬度
         *
         * @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;
        }
    
        /**
         * 处理经度
         *
         * @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类

import lombok.Getter;
    import lombok.Setter;
    
    /**
     * gps 经纬度坐标类
     *
     * @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、说明下、百度的地图加密原始gps地理坐标是这样的：百度地图加密的是 火星坐标系 (GCJ-02)，而GCJ-02加密的是原始gps坐标系。所以从原始gps坐标，到百度地图坐标，顺序是WGS-84 --> GCJ-02 --> BD-09

[https_blog.csdn.net_coolypf_article_details_8569813]: https://blog.csdn.net/coolypf/article/details/8569813