LatLon.cs

public static Vector3 SetLatLonPosition(float r, float lat, float lon)
{
  float phi = (90-lat)*Mathf.Deg2Rad;
  float theta = (lon)*Mathf.Deg2Rad;

  float x = r * Mathf.Sin(phi) * Mathf.Cos(theta);
  float z = r * Mathf.Sin(phi) * Mathf.Sin(theta);
  float y = r * Mathf.Cos(phi);
  Vector3 pos = new Vector3(x,y,z);

  return pos;
}
  
public static Vector2 GetLatLonFromVector3 (Vector3 position, float sphereRadius){
    float lat = (float)Mathf.Acos(position.y / sphereRadius); //theta
    float lon = (float)Mathf.Atan2(position.x, position.z); //phi
    lat *= Mathf.Rad2Deg;
    lon *= Mathf.Rad2Deg;
    return new Vector2(lat, lon);
}