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Aurora: coordinates, UTM zone and magnetic declination

Survey data sheet for Aurora (United States) for field work: coordinates, UTM zone, scale factor, grid convergence, today's magnetic declination and geoid undulation, computed for the city center.

Latitude39°43′45.9″ N
Longitude104°49′54.9″ W
Decimal degrees39.72943, -104.83192
UTM zone13N · MC 105° W
UTM (WGS 84)E 514,404 · N 4,397,741
Scale factor (k)0.999603
Grid convergence+0.1074°
Magnetic declination (today)7.41° E · −4.8′/year
Geoid undulation (EGM2008)N = −17.75 m
Approximate elevation1,648 m
Time zoneAmerica/Denver (UTC−6)
Population359,407

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)

StationLocationDistance
NIST NIST00USABoulder, United States47 km
AMC4 AMC400USAColorado Springs, United States106 km
P043 P04300USANewcastle, United States465 km

Tools to use here

FAQ

What UTM zone is Aurora in?

Aurora is in UTM zone 13N, with central meridian 105° W. In WGS 84, the city center is at E 514,404 m and N 4,397,741 m.

What is the magnetic declination in Aurora?

Today the magnetic declination in Aurora is 7.41° E, changing by −4.8′ 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 Aurora?

The geoid undulation (EGM2008) in Aurora is N = −17.75 m. To convert a GNSS height (ellipsoidal, h) to an approximate orthometric height: H = h − N.

Cities near Aurora

© GeoNames (CC BY 4.0) · Unicode CLDR · WMM2025 (NOAA/BGS) · EGM2008 (NGA) · IGS

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