火星坐标系 (GCJ-02) 与百度坐标系 (BD-09) 的互转 JAVA

package com.asiabasehk.cgg.util;

 

/**火星坐标系 (GCJ-02) 与百度坐标系 (BD-09) 的互转

 * Created by macremote on 16/5/3.

 */

public class GPSUtil {

    public static double pi = 3.1415926535897932384626;

    public static double x_pi = 3.14159265358979324 * 3000.0 / 180.0;

    public static double a = 6378245.0;

    public static double ee = 0.00669342162296594323;

 

    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 double[] transform(double lat, double lon) {

        if (outOfChina(lat, lon)) {

            return new double[]{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 double[]{mgLat,mgLon};

    }

    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;

    }

    /**

     * 84 to 火星坐标系 (GCJ-02) World Geodetic System ==> Mars Geodetic System

     *

     * @param lat

     * @param lon

     * @return

     */

    public static double[] gps84_To_Gcj02(double lat, double lon) {

        if (outOfChina(lat, lon)) {

            return new double[]{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 double[]{mgLat, mgLon};

    }

 

    /**

     * * 火星坐标系 (GCJ-02) to 84 * * @param lon * @param lat * @return

     * */

    public static double[] gcj02_To_Gps84(double lat, double lon) {

        double[] gps = transform(lat, lon);

        double lontitude = lon * 2 - gps[1];

        double latitude = lat * 2 - gps[0];

        return new double[]{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 lat

     * @param lon

     */

    public static double[] gcj02_To_Bd09(double lat, double lon) {

        double x = lon, y = 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 tempLon = z * Math.cos(theta) + 0.0065;

        double tempLat = z * Math.sin(theta) + 0.006;

        double[] gps = {tempLat,tempLon};

        return gps;

    }

 

    /**

     * * 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 double[] bd09_To_Gcj02(double lat, double lon) {

        double x = lon - 0.0065, y = lat - 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);

        double tempLon = z * Math.cos(theta);

        double tempLat = z * Math.sin(theta);

        double[] gps = {tempLat,tempLon};

        return gps;

    }

 

    /**将gps84转为bd09

     * @param lat

     * @param lon

     * @return

     */

    public static double[] gps84_To_bd09(double lat,double lon){

        double[] gcj02 = gps84_To_Gcj02(lat,lon);

        double[] bd09 = gcj02_To_Bd09(gcj02[0],gcj02[1]);

        return bd09;

    }

    public static double[] bd09_To_gps84(double lat,double lon){

        double[] gcj02 = bd09_To_Gcj02(lat, lon);

        double[] gps84 = gcj02_To_Gps84(gcj02[0], gcj02[1]);

        //保留小数点后六位

        gps84[0] = retain6(gps84[0]);

        gps84[1] = retain6(gps84[1]);

        return gps84;

    }

 

    /**保留小数点后六位

     * @param num

     * @return

     */

    private static double retain6(double num){

        String result = String .format("%.6f", num);

        return Double.valueOf(result);

    }

 

}