code
easting /
longitude
northing /
latitude

EPSG description
24821 This code is for UTM zone 21N using PSAD56. Mining, gas, and old maps commonly use this code.
32621 This code is for UTM zone 21N using WGS84. Other government departments and newer maps not related to mining and gas tend to use this code.
4326 This code describes longitude / latitude pairs.