WGS84、GCJ02、BD09地图坐标系间的坐标转换及坐标距离计算

1、常见基本坐标简介

2、虽然GCJ02和BD09对原始地球坐标进行了转换加密，但是仍可以通过浏览器找到转换方法

基本参数

public static double pi = 3.1415926535897932384626;
public static double a = 6378245.0;
public static double ee = 0.00669342162296594323;

火星坐标转百度坐标

/**
 * 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
 */
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);
}

百度坐标转火星坐标

/**
 * 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
 */
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);
}

地球坐标转火星坐标

/**
 * 地球坐标系 (WGS84) 与火星坐标系 (GCJ-02) 的转换算法 将 WGS84 坐标转换成 GCJ-02 坐标
 */
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);
}

火星坐标转地球坐标

/**
 * 地球坐标系 (WGS84) 与火星坐标系 (GCJ-02) 的转换算法 将 GCJ-02 坐标转换成 WGS84 坐标
 */
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);
}

辅助方法

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;
}
private 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);
}
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;
}
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;
}

坐标距离计算

private final static double EARTH_RADIUS = 6378.137;//地球半径
private static double rad(double d) {
    return d * Math.PI / 180.0;
}
/**
 * 计算两点间距离
 * @return double 距离 单位公里,精确到米
 */
public static double GetDistance(double lat1, double lng1, double lat2, double lng2) {
    double radLat1 = rad(lat1);
    double radLat2 = rad(lat2);
    double a = radLat1 - radLat2;
    double b = rad(lng1) - rad(lng2);
    double s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a / 2), 2) +
            Math.cos(radLat1) * Math.cos(radLat2) * Math.pow(Math.sin(b / 2), 2)));
    s = s * EARTH_RADIUS;
    s = new BigDecimal(s).setScale(3, BigDecimal.ROUND_HALF_UP).doubleValue();
    return s;
}

转载自：

http://nightfarmer.github.io/2016/12/01/GPSUtil/