Abstract
Let us have two coordinate systems in a plane. In the first one (e.g. JTSK) the accuracy of the coordinate estimators is signicantly lower than the accuracy in the other system (the inner system of an object). The task is to determine the coordinate estimators of the characteristic points of the object in the first system (with a signicantly lower degree of accuracy) in such a way that the relative accuracy of the characteristic points is the same as the relative accuracy in the inner system.