Industrial enterprises belong to the group of regime-forming objects (RFO), which most often have a negative impact on the surrounding natural environment. Specialists from various fields are involved in the process of design, definition and formation of sanitary protection zones (SPZ): ecologists, urban planners, land surveyors, surveyors, etc. SPZ must be designed around these objects as part of the urban planning documentation directly from the RFO. Land managers design the SPZ from the boundary of the land parcel on which the RFO is located, after which they carry out geodetic determination of the boundaries of the SPZ on the area and carry out their state registration as restrictions on the use of land in the State Land Cadastre. In accordance with existing environmental requirements, environmental experts design the SPZ from the centroid of the emission source. Diversity of demands for different professionals require conduction of specific research on accuracy of the position of the centroid of the RFO – emission source. In this research possible options for the position of the centroid of the emission source depending on the configuration of the RFO, planning models of the SPZ was determined by the authors and substantiated the accuracy of determining the geodetic coordinates of the centroid depending on the method of its determination. Further research should be continued in order to solve the task of determining the coordinates of the centroid (center) of the RFO based on the results of modern ground measurements without the use of cartographic materials and forming proposals for the development of an appropriate methodology that would satisfy the needs of ecologists and will be suitable for other professionals involved.

With the introduction into use of the new state reference system USK-2000, the issue of converting the coordinates of the turning points of the boundaries of land parcels into USK-2000 arises, which is important for geodetic support of the design, construction of engineering structures, etc. The article examines the influence of the transformation parameters on the divergence of the linear parameters of the turning points from the SK-63 coordinate system to the USK-2000 system. The analysis of coordinates and linear parameters of land plots was carried out using conversion coefficients using the affine method according to formulas and compared with those calculated in the Digitals program. Regardless of the area and orientation of the land plot, the sum of increments of its coordinates is equal to zero in the SK-63 and USK- 2000 systems, while the area discrepancy depends on the size of the land plot. To clarify the actual area of a land plot on the physical surface of the Earth, which has a boundary length of more than 500 m, it is necessary to reduce to the reference surface the reference ellipsoid and the Gauss-Kruger projection plane. if the site was connected to the points of the state network.  The relevance of the work is to determine the influence of the transformation of the coordinates of the turning points of land plots in the USK-2000 system on linear parameters (coordinate increments, lengths between the turning points of borders) and the area of small land plots.  The goal of the work. Analyze the discrepancy of linear parameters and the area of land plots after converting the coordinates of turning points from the SK-63 system to the USK-2000 system in the Digitals program and by the affine method using formulas on specific examples. Research results can be taken into account when considering the issue of determining the area of land plots in the USK-2000 coordinate system up to 25 hectares.

Purpose. Analyzing the land disturbance consequences caused by surface mining operations and methods for mapping these lands, as well as studying the accuracy of point coordinates of digital images obtained from materials of aerial photographic surveys using Unmanned Aerial Vehicles (UAVs). Performing a quantitative assessment of the Root Mean Square Error (RMSE) of point coordinates on cartographic images and determining the dependences of the RMSE of point coordinates on the photogrammetric parameters. Methods. The review of previous research publications within the framework of the presented subject is performed in the following sequence: analysis of ecosystem disbalance as a result of surface mining operations; based on previous studies, collecting the data for quantitative assessment of accuracy in the form of RMSE of point coordinates on cartographic images obtained from the materials of aerial photographic survey using UAVs; statistical study of the relationship between the RMSE and photographic survey parameters. Findings. The methods for mapping the disturbed lands to return them to their natural state after the consequences of surface mining operations are presented, based on a review of previous research publications on the subject of the work. According to the previous studies, the RMSE of point coordinates of cartographic images has been systematized, and, based on this, the accuracy of topographic plans has been determined for them. Statistical studies of the relationship between the quantitative assessment of the RMSE (xy) and RMSE (z) accuracy in relation to the photographic survey parameters have been performed. In addition, the scattering diagrams of the correlation dependence and the range of RMSE relative frequency have been presented. Originality. Based on a critical analysis of previous studies on the lack of quantitative accuracy regulation of cartographic images obtained from aerial photographic survey using UAVs, the RMSE systematics has been performed in terms of the photographic survey height. Based on this, the accuracy of topographic plans, the relative frequency of horizontal and vertical distribution of errors, the mean value and the root mean square error (σ) have been determined. Practical implications. The systematics of the RMSE values of cartographic image point coordinates for certain photographic survey parameters and the scale of topographic images makes it possible to take this into account in the project of aerial photographic survey using UAVs of lands for various purposes, as well as to choose the height and photographic equipment according to the required accuracy.