Portland: coordinates, UTM zone and magnetic declination
Survey data sheet for Portland (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 Portland in?
Portland is in UTM zone 10N, with central meridian 123° W. In WGS 84, the city center is at E 525,286 m and N 5,041,153 m.
What is the magnetic declination in Portland?
Today the magnetic declination in Portland is 14.48° E, changing by −7.0′ 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 Portland?
The geoid undulation (EGM2008) in Portland is N = −22.03 m. To convert a GNSS height (ellipsoidal, h) to an approximate orthometric height: H = h − N.
Cities near Portland
- Seattle 233 km
- Sacramento 778 km
- Stockton 849 km
- Oakland 859 km
- San Francisco 862 km
- San Jose 912 km
- Fresno 1,005 km
- Bakersfield 1,170 km
- All cities in United States
© GeoNames (CC BY 4.0) · Unicode CLDR · WMM2025 (NOAA/BGS) · EGM2008 (NGA) · IGS