Ruiru: coordinates, UTM zone and magnetic declination
Survey data sheet for Ruiru (Kenya) 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 Ruiru in?
Ruiru is in UTM zone 37S, with central meridian 39° E. In WGS 84, the city center is at E 273,093 m and N 9,873,180 m.
What is the magnetic declination in Ruiru?
Today the magnetic declination in Ruiru is 0.28° E, changing by −3.4′ 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 Ruiru?
The geoid undulation (EGM2008) in Ruiru is N = −16.07 m. To convert a GNSS height (ellipsoidal, h) to an approximate orthometric height: H = h − N.
Cities near Ruiru
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