/// <summary> /// Updates the constants. /// </summary> protected override void UpdateConstants() { base.UpdateConstants(); k_0 = ScaleFactor; a = EllipsoidType.A(); e2 = EllipsoidType.E2(); e4 = e2 * e2; e6 = e4 * e2; ep2 = EllipsoidType.Ep2(); e_1 = (1 - Math.Sqrt(1 - e2)) / (1 + Math.Sqrt(1 - e2)); e2_1 = e_1 * e_1; e3_1 = e2_1 * e_1; e4_1 = e3_1 * e_1; lambda_0 = MathUtil.Radians(CentralMeridian); phi_0 = MathUtil.Radians(LatitudeOrigin); M_0 = a * ((1 - e2 / 4 - 3 * e4 / 64 - 5 * e6 / 256 /* - ... */) * phi_0 - (3 * e2 / 8 + 3 * e4 / 32 + 45 * e6 / 1024 /* + ... */) * Math.Sin(2 * phi_0) + (15 * e4 / 256 + 45 * e6 / 1024 /* + ... */) * Math.Sin(4 * phi_0) - (35 * e6 / 3072 /* + ... */) * Math.Sin(6 * phi_0) /* + ... */); }