This paper is focussed to questions of transformation ring measured quantities(horizontal angels, distances, coordinate differencies) into the cartographic projection plane S – JTSK. Transfer of horizontal angles is the greatest problem in this procedure. It is supposed in it the angle standard deviationsare greater as the vertical deflection components ξζ and therefore the corresponding angle corection is not made. This assumption but doesn´tmeet the reality mostly in mountain regions and when precise angle measurements are to be performed. Transformation is executed by change of the values measured, i. e. by their corrections, which are needed to obtain usable quantities in all the geodetics tasks.