沿着赤道使用维度和经度相当简单，形成的网格线大致也是方形的。

Using latitude and longitude is easiest along the equator, where the grid lines formed are roughly square.

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根据空中某个物体与地平线之间的角度可以确定纬度，然后根据地球旋转计算出经度。

You can determine latitude from the Angle between a celestial object and the horizon, and you can calculate longitude from the Earth's rotation.

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本初子午线处于0度经度，而国际日期变更线处于180度经度。赤道处于0度纬度。

The prime meridian is at 0 degrees longitude, and the international date line is at 180 degrees. The equator is at 0 degrees latitude.

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