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One of the most important natural factors of rational land management is the terrain, especially its relief. It must be taken into attention  when choosing the field configuration. In addition, the speed and direction of water currents and of migration nutrients depends on the magnitude and direction of the surface slopes.

The object of the research was selected part of the territory, located in the foothill plain of Altai. The relief of the investigated territory is characterized by a considerable dissection with a predominance of surfaces with an inclination angle of 1.5 ... 3.0 °. The area of the plot is 1920 hectares. Coordinates from 50.9 to 50.95 ° N and from 81.55 to 81.63 ° E.

The research method included a survey of the terrain using a Supercam-250 unmanned aerial vehicle equipped with a Sony Alpha 6000 24.3 mP camera, a high-precision on-board receiver JAVAD TRE-G3TAJT, creating a relief map and, after that, a field soil survey, creating a soil map and an integrated map of agro-ecological land types.

The accuracy of the soil survey significantly increases when using the Digital Elevation Model (DEM). In this work, DEM was created using digital aerial photography from a UAV with a resolution of 9 cm per pixel, using marked reference and control points.

The accuracy of the DTM was about 25 cm in height, which corresponds to the requirements for the height of the relief section of 1 m. The construction of the DTM and  DTP (digital topographic plan) was carried out using the programs Photoscan (Agisoft, Russia) and GIS Panorama.

DTM was presented in two versions: 1) the altitude part of the DTP scale 1: 2000 in the form of pickets and horizontals through 1 meter, superimposed on the orthophoto. In this variant, the basic forms of the mesorelief are presented, 2) the matrix of heights, in which each pixel corresponds to a square on a surface measuring 0.5 x 0.5 m. This version of DEM allows you to detail the features of the surface, including the level of microrelief - surface shapes and elements of a size of one and tens of meters, even with slight variations in heights.

The specified cartographic model allows to calculate and visualize such characteristics as surface slope in degrees, direction of surface runoff and erosion, describe relief elements, indicating slope and exposure of the slope, create longitudinal and transverse profiles of surface areas, etc.
Based on the results of soil surveys and on the basis of the relief map data, a rational method of using land, choosing crops and types of soil conservation treatment of soils is determined.