TY CONF TI THE METHODOLOGY OF FORMING A DIGITAL RELIEF MODEL OF THE TERRAIN AND THE ALGORITHM OF ITS OPERATION KW relief KW terrain KW digital model KW geoinformatics KW digital map JO ENERGY-SAVING AND ENVIRONMENTALLY FRIENDLY TECHNOLOGIES IN THE FORESTRY INDUSTRY AU Medvedev, I.N. AU Storodubtseva, T.N. AU Shakirova, O.I. PY 2024 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov