Definition of DMT. History of DMT. Data Sources. Data models TIN and GRID. Spatial data structures for storing DMT. Creation of digital terrain models. Modifications and tuning DMT. Quality assessment of DMT. Imaging (visualization) DMT and related data. Analytical solutions over the role of DMT: volume calculations, visibility analyzes, hydrologic analysis, the slope of the terrain and more. Analysis of DMT as a basis for GIS modeling. The use of DMT.