Function spherical

将三维笛卡尔坐标系下的向量 [x, y, z] 转换为球坐标系下的向量 [lat, lon]（弧度制）。 This function takes a 3D Cartesian vector [x, y, z] and converts it to spherical coordinates [lat, lon].

Example

spherical([1, 0, 0]); // [0, 0]
spherical([0, 1, 0]); // [1.5707963267948966, 1.5707963267948966]
// you need to convert the result to degrees if you want to use it in degrees
spherical([0, 1, 0]).map(x => x * 180 / Math.PI); // [90, 90]
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