Abstract
The work aims to analyze and study the possibilities of using “Cetus” unmanned aerial vehicle (UAV) for performing topographic aerial surveys. The authors developed and tested aircraft-type UAV for topographic aerial photography. The studies were conducted on a specialized landfill, at which there is an appropriate number of situational points whose coordinates are determined with high accuracy. These points were used as both reference and control points. The obtained UAV aerial survey materials were subjected to a phototriangulation process to determine the orientation elements and to analyze, first and foremost, the angular orientation elements. The surveying was carried out on a mountainous territory, where the spatial coordinates of 37 situational points were determined by the method of ground-based GPS survey with an average accuracy of up to 0.05 m. These points were used as reference and control points. Aerial photography was performed in such a way that the scale of the images was as uniform as possible. The design solutions implemented in the Cetus UAV provide all the possibilities to perform aerial surveys of territories in strict compliance with the projected flight parameters. UAV equipment provides the necessary real-time correction of the position of the aerial camera. At the same time the optimum straightness of routes, stability of scales and mutual overlapping of pictures is reached. Regarding the accuracy of obtaining the spatial coordinates of the points of terrain objects, using “Cetus” UAV surveys, plans can even be made on a scale of even 1: 1000. As a result of the creation of the UAV “Cetus”, it became possible to perform the topographic aerial survey of the territories and to create large-scale orthophotos that fully meet the instructions. As a result of testing the “Cetus” UAV, it can be used in production processes when drawing up topographic plans for a large-scale series: 1: 1000 – 1: 5000, which will significantly save the cost of performing topographic work.
Highlights
The content of this study was to determine the suitability of the “Cetus” unmanned aerial vehicle (UAV) for using the aero materials obtained to create largescale topographic plans and special plans for their use in various branches of science and technology
The hypothesis is the possibility of creating such a UAV that would most accurately reproduce the work during aerial photography of a manned aircraft
The novelty is that this type of UAV can be made since studies on its suitability for topographic aerial surveying have confirmed this idea (Hlotov et al, 2014, 2018)
Summary
The content of this study was to determine the suitability of the “Cetus” unmanned aerial vehicle (UAV) for using the aero materials obtained to create largescale topographic plans and special plans for their use in various branches of science and technology. Modern technologies for orthophoto and topographic plans are based on the use of UAV digital aerial materials To confirm this conclusion, we will analyze the recent studies, possibilities, and prospects of using UAVs for topographic aerial surveying. The possibility of using UAV as a new means of obtaining photogrammetric information comes from the disadvantages of two traditional methods of obtaining data with the help of space satellites and human-crewed aerial Summing up the above, it is necessary to focus on the fact that there is an urgent problem of studying the actual angular values of exterior orientation elements and of a priori estimation of the accuracy of these elements. Below is proposed a method developed by the authors to solve such a problem
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