Theni: coordinates, UTM zone and magnetic declination
Survey data sheet for Theni (India) 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 Theni in?
Theni is in UTM zone 43N, with central meridian 75° E. In WGS 84, the city center is at E 771,618 m and N 1,107,667 m.
What is the magnetic declination in Theni?
Today the magnetic declination in Theni is 1.50° W, changing by +1.8′ 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 Theni?
The geoid undulation (EGM2008) in Theni is N = −94.61 m. To convert a GNSS height (ellipsoidal, h) to an approximate orthometric height: H = h − N.
Cities near Theni
- Dindigul 68 km
- Madurai 71 km
- Tirupur 124 km
- Coimbatore 124 km
- Kanayannur 133 km
- Kochi 134 km
- Tirunelveli 145 km
- Thrissur 149 km
- All cities in India
© GeoNames (CC BY 4.0) · Unicode CLDR · WMM2025 (NOAA/BGS) · EGM2008 (NGA) · IGS