## Investigation of the accuracy of plans of Lviv in 1844 and 1932

**Purpose** of this work is the investigation of the accuracy of plans of Lviv in 1844 and 1931. **Methodology**. The main criterion for evaluation of the authenticity of ancient maps is the study of their geometric accuracy, which is determined by the magnitudes of errors that arise when measuring lengths, angles, coordinates, and other cartometric attributes.