http://www.biz-gis.com/index.php?mid=pds&document_srl=67326
https://m.blog.naver.com/PostView.naver?isHttpsRedirect=true&blogId=goodfe2&logNo=150105730935
직접 지정해주어야 하는 경우 설정 방법
https://docs.qgis.org/3.10/ko/docs/user_manual/working_with_projections/working_with_projections.html