Welkom: coordinates, UTM zone and magnetic declination
Survey data sheet for Welkom (South Africa) for field work: coordinates, UTM zone, scale factor, grid convergence, today's magnetic declination and geoid undulation, computed for the city center.
Values for the city center (GeoNames coordinate). Declination from the World Magnetic Model 2025 for today's date; geoid from EGM2008. For an exact point, use the tools below.
Nearest GNSS reference stations (IGS)
Tools to use here
FAQ
What UTM zone is Welkom in?
Welkom is in UTM zone 35S, with central meridian 27° E. In WGS 84, the city center is at E 473,945 m and N 6,905,271 m.
What is the magnetic declination in Welkom?
Today the magnetic declination in Welkom is 23.08° W, changing by −16.5′ per year (WMM2025 model). To get the true azimuth, add the declination to the magnetic azimuth (East positive, West negative).
What is the geoid undulation in Welkom?
The geoid undulation (EGM2008) in Welkom is N = 30.21 m. To convert a GNSS height (ellipsoidal, h) to an approximate orthometric height: H = h − N.
Cities near Welkom
- Bloemfontein 137 km
- Botshabelo 143 km
- Vereeniging 187 km
- Evaton 195 km
- Soweto 220 km
- Roodepoort 231 km
- Krugersdorp 234 km
- Johannesburg 236 km
- All cities in South Africa
© GeoNames (CC BY 4.0) · Unicode CLDR · WMM2025 (NOAA/BGS) · EGM2008 (NGA) · IGS