Ottawa: coordinates, UTM zone and magnetic declination
Survey data sheet for Ottawa (Canada) 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 Ottawa in?
Ottawa is in UTM zone 18N, with central meridian 75° W. In WGS 84, the city center is at E 445,372 m and N 5,028,865 m.
What is the magnetic declination in Ottawa?
Today the magnetic declination in Ottawa is 12.56° W, changing by +4.1′ 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 Ottawa?
The geoid undulation (EGM2008) in Ottawa is N = −33.64 m. To convert a GNSS height (ellipsoidal, h) to an approximate orthometric height: H = h − N.
Cities near Ottawa
- Gatineau 7 km
- Laval 157 km
- Montreal 165 km
- Markham 330 km
- Vaughan 348 km
- Toronto 349 km
- Etobicoke 364 km
- Mississauga 374 km
- All cities in Canada
© GeoNames (CC BY 4.0) · Unicode CLDR · WMM2025 (NOAA/BGS) · EGM2008 (NGA) · IGS