Apart from freely available global to near-global medium-resolution DEMs (1-3"SRTM, 1"ASTER), for the territory of the Republic of Macedonia, three additional high quality DEMs are available. They are as follows: 20m and 5m DEM of the Agency of Real Estate and Cadastre (AREC) and 15m DEM filtered from original 5m DEM. For general purposes, horizontal and vertical accuracy of all of those models (even the freely available ones) is acceptable. But in fine-scale terrain applications and modellings, slope accuracy is much more sensitive and uncerta- in. Instead of assessment only, some kind of DEM-related slope accuracy correction and improvement is very useful. An example of such a procedure is presented in the current paper.