坐标转换 高斯

void srcXY2destXY(double Xsrc, double Ysrc, double& Xdes, double& Ydes)
{
    Double DX=123.3
    Double DY=234.4
    T=-0.000017111
    K=0.999999999
    double S = K * sin(T);
    double C = K * cos(T);
    Xdes = DX + C * Xsrc - S * Ysrc;
    Ydes = DY + S * Xsrc + C * Ysrc;
}

高斯

void GaussProjCal(double longitude, double latitude, double& X, double& Y)
{
    if (overdue())
    {
        return;
    }
    int ProjNo = 0; int ZoneWide; 带宽 
    double longitude1, latitude1, longitude0, latitude0, X0, Y0, xval, yval;
    double a, f, e2, ee, NN, T, C, A, M, iPI;
    iPI = 0.0174532925199433; 3.1415926535898/180.0; 
    ZoneWide = 3; 6度带宽 
    a = 6378137.0; f = 0.003352811;//0.003352811;//1.0/298.257; //2000坐标系参数 
    a=6378245.0; f=1.0/298.3; //54年北京坐标系参数 
    a=6378140.0; f=1/298.257; //80年西安坐标系参数 
    //ProjNo = (int)(longitude / ZoneWide);// 20161222 modify
    ProjNo = (int)(longitude / ZoneWide + 0.5f);// 20161222 modify 
    longitude0 = ProjNo * ZoneWide;
    longitude0 = longitude0 * iPI;
    latitude0 = 0;
    longitude1 = longitude * iPI; //经度转换为弧度
    latitude1 = latitude * iPI; //纬度转换为弧度
    e2 = 2 * f - f * f;
    ee = e2 * (1.0 - e2);
    NN = a / sqrt(1.0 - e2 * sin(latitude1) * sin(latitude1));
    T = tan(latitude1) * tan(latitude1);
    C = ee * cos(latitude1) * cos(latitude1);
    A = (longitude1 - longitude0) * cos(latitude1);


    M = a * ((1 - e2 / 4 - 3 * e2 * e2 / 64 - 5 * e2 * e2 * e2 / 256) * latitude1 - (3 * e2 / 8 + 3 * e2 * e2 / 32 + 45 * e2 * e2
        * e2 / 1024) * sin(2 * latitude1)
        + (15 * e2 * e2 / 256 + 45 * e2 * e2 * e2 / 1024) * sin(4 * latitude1) - (35 * e2 * e2 * e2 / 3072) * sin(6 * latitude1));
    xval = NN * (A + (1 - T + C) * A * A * A / 6 + (5 - 18 * T + T * T + 72 * C - 58 * ee) * A * A * A * A * A / 120);
    yval = M + NN * tan(latitude1) * (A * A / 2 + (5 - T + 9 * C + 4 * C * C) * A * A * A * A / 24
        + (61 - 58 * T + T * T + 600 * C - 330 * ee) * A * A * A * A * A * A / 720);
    X0 = 1000000L * ProjNo + 500000L;
    Y0 = 0;
    xval = xval + X0; yval = yval + Y0;
    X = xval;
    Y = yval;
}

2.2.2平面转经纬度代码
//平面转gps
void GaussProjInvCal(double X, double Y, double& longitude, double& latitude)
{
    if (overdue())
    {
        return;
    }
    int ProjNo; int ZoneWide; 带宽 
    double longitude1, latitude1, longitude0, latitude0, X0, Y0, xval, yval;
    double e1, e2, f, a, ee, NN, T, C, M, D, R, u, fai, iPI;
    iPI = 0.0174532925199433; 3.1415926535898/180.0; 
    a = 6378137.0; f = 0.003352811;//0.003352811;//1.0/298.257; //2000坐标系参数 
    //a = 6378245.0; f = 1.0/298.3; //54年北京坐标系参数 
    a=6378140.0; f=1/298.257; //80年西安坐标系参数 
    ZoneWide = 3; 3度带宽 
    ProjNo = (int)(X / 1000000L); //查找带号
    longitude0 = ProjNo * ZoneWide;
    longitude0 = longitude0 * iPI; //中央经线
    X0 = ProjNo * 1000000L + 500000L;
    Y0 = 0;
    xval = X - X0; yval = Y - Y0; //带内大地坐标
    e2 = 2 * f - f * f;
    e1 = (1.0 - sqrt(1 - e2)) / (1.0 + sqrt(1 - e2));
    ee = e2 / (1 - e2);
    M = yval;
    u = M / (a * (1 - e2 / 4 - 3 * e2 * e2 / 64 - 5 * e2 * e2 * e2 / 256));
    fai = u + (3 * e1 / 2 - 27 * e1 * e1 * e1 / 32) * sin(2 * u) + (21 * e1 * e1 / 16 - 55 * e1 * e1 * e1 * e1 / 32) * sin(
        4 * u)
        + (151 * e1 * e1 * e1 / 96) * sin(6 * u) + (1097 * e1 * e1 * e1 * e1 / 512) * sin(8 * u);
    C = ee * cos(fai) * cos(fai);
    T = tan(fai) * tan(fai);
    NN = a / sqrt(1.0 - e2 * sin(fai) * sin(fai)); //字串1 
    R = a * (1 - e2) / sqrt((1 - e2 * sin(fai) * sin(fai)) * (1 - e2 * sin(fai) * sin(fai)) * (1 - e2 * sin
    (fai) *sin(fai)));
    D = xval / NN;
    //计算经度(Longitude) 纬度(Latitude)
    longitude1 = longitude0 + (D - (1 + 2 * T + C) * D * D * D / 6 + (5 - 2 * C + 28 * T - 3 * C * C + 8 * ee + 24 * T * T) * D
        * D * D * D * D / 120) / cos(fai);
    latitude1 = fai - (NN * tan(fai) / R) * (D * D / 2 - (5 + 3 * T + 10 * C - 4 * C * C - 9 * ee) * D * D * D * D / 24
        + (61 + 90 * T + 298 * C + 45 * T * T - 256 * ee - 3 * C * C) * D * D * D * D * D * D / 720);
    //转换为度 DD
    longitude = longitude1 / iPI;
    latitude = latitude1 / iPI;
}

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