Anholonomity when using the development method for the reduction of observations to the reference ellipsoid

For computing the geodetic coordinates ϕ and γ on the ellipsoid one needs information of the gravity field, thus making it possible to reduce the terrestrial observations to the reference surface. Neglect of gravity field data, such as deflections of the vertical and geoid heights, results in misclosure effects, which can be described using the object of anholonomity.