Colombo: coordinates, UTM zone and magnetic declination
Survey data sheet for Colombo (Sri Lanka) 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 Colombo in?
Colombo is in UTM zone 44N, with central meridian 81° E. In WGS 84, the city center is at E 372,810 m and N 766,771 m.
What is the magnetic declination in Colombo?
Today the magnetic declination in Colombo is 1.90° W, changing by +2.4′ 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 Colombo?
The geoid undulation (EGM2008) in Colombo is N = −97.27 m. To convert a GNSS height (ellipsoidal, h) to an approximate orthometric height: H = h − N.
© GeoNames (CC BY 4.0) · Unicode CLDR · WMM2025 (NOAA/BGS) · EGM2008 (NGA) · IGS