Tongi: coordinates, UTM zone and magnetic declination
Survey data sheet for Tongi (Bangladesh) 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 Tongi in?
Tongi is in UTM zone 46N, with central meridian 93° E. In WGS 84, the city center is at E 235,505 m and N 2,644,648 m.
What is the magnetic declination in Tongi?
Today the magnetic declination in Tongi is 0.35° W, changing by +1.3′ 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 Tongi?
The geoid undulation (EGM2008) in Tongi is N = −54.22 m. To convert a GNSS height (ellipsoidal, h) to an approximate orthometric height: H = h − N.
Cities near Tongi
- Pallabi 8 km
- Mirpur Model Thana 10 km
- Bhatara 11 km
- Kafrul 12 km
- Gazipur 12 km
- Savar Upazila 16 km
- Dhaka 20 km
- Comilla 93 km
- All cities in Bangladesh
© GeoNames (CC BY 4.0) · Unicode CLDR · WMM2025 (NOAA/BGS) · EGM2008 (NGA) · IGS