https://blog.gongquiz.com/2022/11/11/%ec%a0%95%eb%b0%80%ec%b8%a1%ec%9c%84%eb%a5%bc-%ec%9c%84%ed%95%98%ec%97%ac-gps%ec%b8%a1%eb%9f%89%ec%9d%84-%ec%9d%b4%ec%9a%a9%ed%95%98%ea%b3%a0%ec%9e%90-%ed%95%a0-%eb%95%8c-%ea%b0%80%ec%9e%a5-%eb%b6%80/