BLH2XYZ&&WGS2UTM

#region BLH2XYZ
       private const double a = 6378137;
       private const double f = 1 / 298.257222101;
       private static void BLH2XYZ(double B, double L, double H, out double X, out double Y, out double Z)
       {
           // 三个输入B、L、H，三个输出X、Y、Z
           // 角度转弧度
           B = B * Math.PI / 180;
           L = L * Math.PI / 180;
           // 计算相关参数
           double e2 = GetE2();
           double N = GetN(B);
           // 转化计算
           X = (N + H) * Math.Cos(B) * Math.Cos(L);
           Y = (N + H) * Math.Cos(B) * Math.Sin(L);
           Z = (N * (1 - e2) + H) * Math.Sin(B);
       }
       private static double GetE2()
       {
           double e2 = 2 * f - f * f;
           return e2;
       }
       private static double GetN(double B)
       {
           double e2 = GetE2();
           double sinB = Math.Sin(B);
           double N = a / Math.Sqrt(1 - e2 * sinB * sinB);
           return N;
       }
       #endregion

选的好像是WGS84（参考椭球体）的长短轴，扁率

#region WGS2UTM
       static double pi = Math.PI;
       static double sm_a = 6378137.0;
       static double sm_b = 6356752.314;
       //static double sm_EccSquared = 6.69437999013e-03;
       static double UTMScaleFactor = 0.9996;
       //得到的结果是：x坐标，y坐标，区域编号
       public static double[] LatLonToUTM(double lat, double lon)
       {
           double zone = Math.Floor((lon + 180.0) / 6) + 1;
           double cm = UTMCentralMeridian(zone);
           double[] xy = new double[2];
           MapLatLonToXY(lat / 180.0 * pi, lon / 180 * pi, cm, out xy);
           /* Adjust easting and northing for UTM system. */
           xy[0] = xy[0] * UTMScaleFactor + 500000.0;
           xy[1] = xy[1] * UTMScaleFactor;
           if (xy[1] < 0.0)
           {
               xy[1] = xy[1] + 10000000.0;
           }
           return new double[] { xy[0], xy[1], zone };
       }
       public static double UTMCentralMeridian(double zone)
       {
           double cmeridian;
           double deg = -183.0 + (zone * 6.0);
           cmeridian = deg / 180.0 * pi;
           return cmeridian;
       }
       internal static void MapLatLonToXY(double phi, double lambda, double lambda0, out double[] xy)
       {
           double N, nu2, ep2, t, t2, l;
           double l3coef, l4coef, l5coef, l6coef, l7coef, l8coef;
           double tmp;
           /* Precalculate ep2 */
           ep2 = (Math.Pow(sm_a, 2.0) - Math.Pow(sm_b, 2.0)) / Math.Pow(sm_b, 2.0);
           /* Precalculate nu2 */
           nu2 = ep2 * Math.Pow(Math.Cos(phi), 2.0);
           /* Precalculate N */
           N = Math.Pow(sm_a, 2.0) / (sm_b * Math.Sqrt(1 + nu2));
           /* Precalculate t */
           t = Math.Tan(phi);
           t2 = t * t;
           tmp = (t2 * t2 * t2) - Math.Pow(t, 6.0);
           /* Precalculate l */
           l = lambda - lambda0;
           /* Precalculate coefficients for l**n in the equations below
              so a normal human being can read the expressions for easting
              and northing
              -- l**1 and l**2 have coefficients of 1.0 */
           l3coef = 1.0 - t2 + nu2;
           l4coef = 5.0 - t2 + 9 * nu2 + 4.0 * (nu2 * nu2);
           l5coef = 5.0 - 18.0 * t2 + (t2 * t2) + 14.0 * nu2
               - 58.0 * t2 * nu2;
           l6coef = 61.0 - 58.0 * t2 + (t2 * t2) + 270.0 * nu2
               - 330.0 * t2 * nu2;
           l7coef = 61.0 - 479.0 * t2 + 179.0 * (t2 * t2) - (t2 * t2 * t2);
           l8coef = 1385.0 - 3111.0 * t2 + 543.0 * (t2 * t2) - (t2 * t2 * t2);
           /* Calculate easting (x) */
           xy = new double[2];
           xy[0] = N * Math.Cos(phi) * l
               + (N / 6.0 * Math.Pow(Math.Cos(phi), 3.0) * l3coef * Math.Pow(l, 3.0))
               + (N / 120.0 * Math.Pow(Math.Cos(phi), 5.0) * l5coef * Math.Pow(l, 5.0))
               + (N / 5040.0 * Math.Pow(Math.Cos(phi), 7.0) * l7coef * Math.Pow(l, 7.0));
           /* Calculate northing (y) */
           xy[1] = ArcLengthOfMeridian(phi)
               + (t / 2.0 * N * Math.Pow(Math.Cos(phi), 2.0) * Math.Pow(l, 2.0))
               + (t / 24.0 * N * Math.Pow(Math.Cos(phi), 4.0) * l4coef * Math.Pow(l, 4.0))
               + (t / 720.0 * N * Math.Pow(Math.Cos(phi), 6.0) * l6coef * Math.Pow(l, 6.0))
               + (t / 40320.0 * N * Math.Pow(Math.Cos(phi), 8.0) * l8coef * Math.Pow(l, 8.0));
           return;
       }
       internal static double ArcLengthOfMeridian(double phi)
       {
           double alpha, beta, gamma, delta, epsilon, n;
           double result;
           /* Precalculate n */
           n = (sm_a - sm_b) / (sm_a + sm_b);
           /* Precalculate alpha */
           alpha = ((sm_a + sm_b) / 2.0)
              * (1.0 + (Math.Pow(n, 2.0) / 4.0) + (Math.Pow(n, 4.0) / 64.0));
           /* Precalculate beta */
           beta = (-3.0 * n / 2.0) + (9.0 * Math.Pow(n, 3.0) / 16.0)
              + (-3.0 * Math.Pow(n, 5.0) / 32.0);
           /* Precalculate gamma */
           gamma = (15.0 * Math.Pow(n, 2.0) / 16.0)
               + (-15.0 * Math.Pow(n, 4.0) / 32.0);
           /* Precalculate delta */
           delta = (-35.0 * Math.Pow(n, 3.0) / 48.0)
               + (105.0 * Math.Pow(n, 5.0) / 256.0);
           /* Precalculate epsilon */
           epsilon = (315.0 * Math.Pow(n, 4.0) / 512.0);
           /* Now calculate the sum of the series and return */
           result = alpha
               * (phi + (beta * Math.Sin(2.0 * phi))
                   + (gamma * Math.Sin(4.0 * phi))
                   + (delta * Math.Sin(6.0 * phi))
                   + (epsilon * Math.Sin(8.0 * phi)));
           return result;
       }
       #endregion