국토지리학회지 ISSN:1225-3766(Print) THE GEOGRAPHICAL JOURNAL OF KOREA

Korea Meteorological Administration(KMA) has provided digital forecast that is very popular in-use in Korea. It provides the results of the numerical forecast model in 5km grid units based on Lambert conformal conic projection method. This paper aims to perform a quantitative analysis of KMA standard projection and analyze the possibility of variation in the grid coordinate system. The conclusions of this study are as follows. First, the area distortion of KMA standard projection and the alternative projection was quantitatively analyze and confirmed the applicability of the alternative projection method that can reduce the area distortion. Second, since the digital forecast on a random grid can changes to that of other grid and the grid coordinate system is variable depending on the change in projection method, it is necessary to use a projection with small area distortion. . Third, if there are many grids in an administrative district, the current digital forecast information is not appropriate as a representative that sufficiently reflects the forecast forecast of the many grids in the administrative district. In addition, it is judged necessary to review the modification of the grid coordinate database in relation to changes in the reference ellipsoid, reorganization of administrative districts, or relocation of administrative agencies.