大地高斯正反算-C(共6页).doc

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l = l * / 180;
N = a / (1 - E * (B) * (B), );
m0 = a * (1 - E);
m2 = * E * m0;
m4 = 5 / 4 * E * m2;
m6 = 7 / 6 * E * m4;
m8 = 9 / 8 * E * m6;
X = (m0 + * m2 + 3 / 8 * m4 + 5 / 16 * m6 + 35 / 128 * m8) * B - ( * m2 + * m4 + 15 / 32 * m6 + 7 / 16 * m8) / 2 * (2 * B) + (m4 / 8 + 3 / 16 * m6 + 7 / 32 * m8) / 4 * (4 * B) - (m6 / 32 + m8 / 16) / 6 * (6 * B) + m8 / 128 / 8 * (8 * B);
t = (B);
n = (B) * (B) * E1;
m = (B) * l;
x = X + N / 2 * t * (B) * (B) * l * l + N / 24 * t * (5 - t * t + 9 * n + 4 * n * n) * ((B) * l, 4) + N / 720 * t * (61 - 58 * t * t + t * t * t * t) * ((B) * l, 6);
y = N * ((1 + (1 / 6 * (1 - t * t + n) + 1 / 120 * (5 - 18 * t * t + t * t * t * t + 14 * n - 58 * n * t * t) * m * m) * m * m) * m);
= (x);
= (y);
}
}

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