Chicago: coordinates, UTM zone and magnetic declination
Survey data sheet for Chicago (United States) 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 Chicago in?
Chicago is in UTM zone 16N, with central meridian 87° W. In WGS 84, the city center is at E 446,038 m and N 4,633,330 m.
What is the magnetic declination in Chicago?
Today the magnetic declination in Chicago is 4.17° 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 Chicago?
The geoid undulation (EGM2008) in Chicago is N = −33.89 m. To convert a GNSS height (ellipsoidal, h) to an approximate orthometric height: H = h − N.
Cities near Chicago
- Milwaukee 134 km
- Indianapolis 263 km
- Detroit 384 km
- Cincinnati 402 km
- Louisville 431 km
- Columbus 444 km
- Cleveland 496 km
- Lexington-Fayette 502 km
- All cities in United States
© GeoNames (CC BY 4.0) · Unicode CLDR · WMM2025 (NOAA/BGS) · EGM2008 (NGA) · IGS