IN DUBIO PRO GEO Ellipsoid : Length of meridian arc

The length of meridian arc M between the parallels of geographical latitudes φ₁ and φ₂ is computed.

Note

Angle unit	Degrees [-90...90] DegMinSec [-90...90] Radians [-π/2...π/2] Turns [-½...½]
Ellipsoid of rotation	Airy 1830 Australian 1965 Bessel 1841 Bessel 1841 Namibia Clarke 1866 Clarke 1880 Everest 1830 India Everest 1830 Malaysia Everest 1956 India Everest 1964 Malaysia Everest 1969 Malaysia Everest Pakistan Fisher 1960 GRS 80 Helmert 1906 Hough 1906 Indonesian 1974 International 1924 Krassovsky 1940 Modified Airy South American 1969 WGS 72 WGS 84 Sphere (6371 km)
Geographical latitude 1
Geographical latitude 2