BIM-modeling for geodetic control of construction

Abstract

Problem. At each stage of the city's reconstruction, high-resolution three-dimensional photogrammetric or laser models can be superimposed and compared to pre-planned BIM objects. The issue is researching the causes of aerial photography errors and identifying the ways to eliminate them. Goal. The task of experimental research is to determine the hovering height of an unmanned aerial vehicle relative to the earth's surface and to compare the value of the height with the planned parameters of the on-board navigator. Methodology. A Phantom-3 quadrocopter, a TRIMBLE 3305DR electronic total station, and a 3T5KP optical theodolite were used for the experiment. Nivelir 2N10KL marks were pasted on the four sides of the quadcopter and the distance from the bottom of its legs to the mark was measured to guide the grid of sighting tubes of the electronic total station and theodolite. Results. As a result of the experiment, it was found that the deviation in the height of the quadcopter is + 1.22 m and + 1.38 m from the planned one, but these values do not correspond to the accuracy specified by the unmanned aerial vehicles manufacturer, which is ± 0.1 m. Originality. New BIM method creates new possibilities for geodesists on construction sites. Geodesists in their practice on construction sites when performing geodetic works have to quickly adapt to new operational procedures, requirements on spatial determination of objects, new technical equipment, SW instruments and standards exploited in BIM method. The value of geodetic works is also the transformation of the resulting spatial data into territorial information systems in 3D-representation. Practical value. The maximum deviation of the quadcopter in the plan from the starting point was 1.25 m for the planned height of the quadcopter of 20 m, and all other values do not exceed ± 1 m, which corresponds to the accuracy of keeping the quadcopter in the vertical plan. It is expedient to use situational aerial photography with the help of a quadrocopter in the study of destroyed buildings in modern urban development. It is especially necessary to obtain a general photograph of the area on which research is being carried out, when this cannot be done from the ground.