ABSTRACT
The coordinate transformation methods used so far between local reference systems used in mining enterprises are characterized by limited accuracy, resulting in inconsistencies in the coordinates of corresponding boundary points, despite their precise location in the field. This problem, which is significant from the point of view of ensuring the integrity of geospatial data, has been thoroughly analyzed in a research study conducted at the Silesian University of Technology. In response to the identified topological inconsistencies, a new transformation procedure based on the Method of Independent Models (MIM) has been developed. This method enables precise mapping of the spatial relationships between points and effective elimination of errors arising from the simplified assumptions of classical transformation methods. The article presents the algorithm of the authors’ transformation procedure, which accounts for the Earth's curvature, including the ellipsoid and cartographic projections and the results of a transformation task applied to 14 mining areas located in southern Poland, within the Upper Silesian Coal Basin. The results obtained were compared with the coordinates derived from transformations performed separately for each mining area and those from the MIM method without considering Earth's curvature. The positional differences of corresponding boundary points in the analyzed areas after applying the MIM method (in two variants) ranged from just 0.002 to 0.066 meters.
