San Antonio: coordinates, UTM zone and magnetic declination
Survey data sheet for San Antonio (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 San Antonio in?
San Antonio is in UTM zone 14N, with central meridian 99° W. In WGS 84, the city center is at E 549,118 m and N 3,255,083 m.
What is the magnetic declination in San Antonio?
Today the magnetic declination in San Antonio is 3.47° E, changing by −4.7′ 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 San Antonio?
The geoid undulation (EGM2008) in San Antonio is N = −26.51 m. To convert a GNSS height (ellipsoidal, h) to an approximate orthometric height: H = h − N.
Cities near San Antonio
- Austin 118 km
- Corpus Christi 210 km
- Houston 305 km
- Fort Worth 384 km
- Arlington 391 km
- Dallas 407 km
- Plano 435 km
- Oklahoma City 678 km
- All cities in United States
© GeoNames (CC BY 4.0) · Unicode CLDR · WMM2025 (NOAA/BGS) · EGM2008 (NGA) · IGS