An analysis of known algorithms for computing geodetic latitude of a spatial rectangular coordinates is considered. A formula for the direct calculation of latitude rectangular coordinates is offered. The formula for change to ensure the accuracy of points in the earth’s surface at any point before 0,0001'' is ensured.
(2012) On calculation of geodetic height on spatial rectangular coordinates. Geodesy and cartography = Geodezia i Kartografia, 73(2), pp. 9-11. (In Russian).