Home / Transformation ATS77 to NAD83(CSRS98) (1) EPSG:4122 → EPSG:4140 Deprecated Coordinate Reference Systems Source CRS EPSG:4122 ATS77 Geographic 2D Target CRS EPSG:4140 NAD83(CSRS98) Geographic 2D Remarks Introduced in 1999. Can be taken as an approximate transformation ATS77 to WGS 84 - see code 1688.