Benoni: coordinates, UTM zone and magnetic declination
Survey data sheet for Benoni (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 Benoni in?
Benoni is in UTM zone 35S, with central meridian 27° E. In WGS 84, the city center is at E 631,976 m and N 7,102,772 m.
What is the magnetic declination in Benoni?
Today the magnetic declination in Benoni is 20.92° W, changing by −15.9′ 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 Benoni?
The geoid undulation (EGM2008) in Benoni is N = 26.42 m. To convert a GNSS height (ellipsoidal, h) to an approximate orthometric height: H = h − N.
Cities near Benoni
- Boksburg 7 km
- Brakpan 7 km
- Thembisa 23 km
- Johannesburg 28 km
- Randburg 34 km
- Diepsloot 42 km
- Roodepoort 45 km
- Soweto 47 km
- All cities in South Africa
© GeoNames (CC BY 4.0) · Unicode CLDR · WMM2025 (NOAA/BGS) · EGM2008 (NGA) · IGS