The aim of this thesis was to familiarize the wider forest public with the basics of aerial photogrammetry, the use of unmanned aerial systems in photogrammetry in forestry and the comparison of created precision relief models from vertical materials and oblique imaging materials. The basis of the work is an explanation of important concepts in the field of aerial photogrammetry and a description of the workflow for processing images obtained by UAS in various available software products. Photomodeler UAS and Agisoft Metashape software for generating point cloud and ArcGIS in which the clouds were compared were described in more detail. For a better understanding of the issue, a brief guide to image processing, the generation of a point cloud and other outputs of the area of interest has been developed so that it can be understood by a common potential user (student), without the need for a deeper study of geodesy and photogrammetry. At the end of the work, two products made up of oblique and vertical aerial photography were compared. The density of the point cloud from the individual imaging methods in the area well represented by the rugged terrain of the forest environment was compared. We can say that only 6,77% the area covered by points of interest were reached using vertical images and when using sloping images it was 72,14% which clearly points to the possibility of creating a more precise model of relief from oblique imagery in forest terrain. Thus, the method of imaging has a fundamental impact on the quality of the final product. The solution in such a rugged terrain is a combination of vertical and oblique imaging.