Ambattur: coordinates, UTM zone and magnetic declination
Survey data sheet for Ambattur (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 Ambattur in?
Ambattur is in UTM zone 44N, with central meridian 81° E. In WGS 84, the city center is at E 409,107 m and N 1,448,144 m.
What is the magnetic declination in Ambattur?
Today the magnetic declination in Ambattur is 1.07° 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 Ambattur?
The geoid undulation (EGM2008) in Ambattur is N = −92.02 m. To convert a GNSS height (ellipsoidal, h) to an approximate orthometric height: H = h − N.
Cities near Ambattur
- Avadi 6 km
- Chennai 13 km
- Tirupati 100 km
- Vellore 113 km
- Puducherry 134 km
- Gundupālaiyam 134 km
- Nellore 151 km
- Kallakurichi 200 km
- All cities in India
© GeoNames (CC BY 4.0) · Unicode CLDR · WMM2025 (NOAA/BGS) · EGM2008 (NGA) · IGS