Purpose. Authenticity of informativeness of public cadastral map of Ukraine is an important component of an open democratic society. It allows to adopt adequate to existing realities administrative decisions of the authorities regarding the development of territories, of certain individuals and legal entities regarding the investments, changes of forms of ownership and intended use of lands and so on.
The purpose of this article is the research of results of approximation of functions of calculation of the meansquare errors of land parcels areas to determine such approximation function, which would allow most accurately calculate the permissible values of mean square errors depending on the size and elongation of land parcel. Methods. To meet the goal an approximation of functions by the method of least squares was performed. Two functions were used for approximation – the natural logarithm and power, as well as the evaluation of the accuracy was done.