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比如说东京50°，北纬30°，计算一下距离这个点10千米的正东、正西、正南、正北四个点的经纬度

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Release： 2016-06-06 20:39:00
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比如说东京50°，北纬30°，计算一下距离这个点10千米的正东、正西、正南、正北四个点的经纬度

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比如说东京50°，北纬30°，计算一下距离这个点10千米的正东、正西、正南、正北四个点的经纬度

谢不邀！
这么有意思的初中数学题，必须答一下。

假设地球是个完美的球体，半径为R，地球周长2πR。

正北 10km，和正南 10km 的经度不变，纬度分别加减 (10*360)/2πR 度。

正东和正西 10km 纬度不变，经度分别加减 (10*360)/2π(cos30*R) 度。

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