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equatorial bulge 赤道隆起帶。

equatorial guinea

Instead of assuming the earth to be a perfect sphere , this function takes into account the actual polar flattening of the earth and the equatorial bulge , which gives a much more accurate computation between the given coordinates 它沒有假設地球是一個完整的球面,而是考慮了地球的極軸扁平率和赤道鼓起率,這樣就給出了兩個坐標間更精確的距離。