Analysis of the results of the use UAV Trimble UX-5 for creation of orthophotomaps and digital model of relief

: pp. 90-103
Department of Geodesy, Lviv Polytechnic National University
Lviv Polytechnic National University
Lviv Polytechnic National University
Lviv Polytechnic National University
Department of Higher Geodesy and Astronomy of Lviv Polytechnic National University
Engineering geodesy department of Lviv Polytechnic National University

Purpose. The purpose of this paper is to analysis and research capabilities of unmanned aerial vehicle (UAV) Trimble UX5 to create orthophotomap and digital elevation models (DEM), as well as identifying and addressing possible shortcomings in the aerial survey and processing of aerial photographs. Methods. Before starting aerosurveying conducted reconnaissance of the area. For nose-up and glide-path elected corresponding surface area on the ground had areal options on listed specifications for the UAV, and satisfy the conditions for launching and landing UAV.For preliminary design and calculation works software was used Trimble Access Aerial Imaging, which install a protected field controller Trimble Tablet, which is used to control UX5.UAV aerial survey was carried out with a digital camera SONY NEX 5R.Since the UAV UX5 stipulated the establishment of two-frequency GPS-receiver for in-flight values of projection centers, it was done discharged horizontal and vertical tie-in markings.For operative creation of orthophotomap used photogrammetric module Trimble Business Center Photogrammetry Module, the company Trimble, with which you can create a point cloud, triangular irregular grids (TIN- model) and plan to display contour lines, terrain over was carried out aerial aerosurveying.To confirm the possibility of using digital stereophotogrammetric method calculated apriori estimate of the accuracy of the spatial coordinates of the area. To assess the accuracy of the terrain defined checkpoints at three pilot sites. Coordinates of points determined during VFR GPS – receivers Trimble R7 mode RTK. After creating orthophotomap they measured the coordinates of the above points and calculated root-mean-square error measured relative to the coordinates on the ground. Results. For aerial survey conducted with a height of 150 m, 200 m and 300 m on the received images were calculated mean square error provisions terrain contour points, which confirm the possibility of using aircraft model Trimble UX5 to produce topographic maps at scales of 1: 500, 1: 1000 and 1: 2000 section 0.5-1 m contour for these scales and 1 m for the third scale. The scientific novelty. Based on a critical analysis of the design and operational features Trimble UX5 UAV developed technological scheme to evaluate the fitness of UAV aerosurveying both quantitative and qualitative parameters. This will enable further evaluate any models UAV regarding their use in digital stereofotohrammetryc method of creating large-scale orthophotomap and topographical plans. The practical significance The use of UAVs Trimble UX5 allows you to take difficult territory, with the required precision to produce large-scale topographic and cadastral plans in the application of digital stereophotogrammetric method that can significantly reduce the cost of the process of creating the above plans.

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