This article presents the results of detailization of a large-scale soil map of agricultural lands on the basis of high-resolution satellite images and ground-based studies. With the use of GIS technologies, a map of the structure of soil cover of a key section of the central part of the Krasnoyarsk forest-steppe and of Prieniseyskaya Siberia was compiled. Phototagons were obtained for the interpretation of images when mapping the soil cover of a watershed and slope surface.