Horizontal coordinates transformation and residuals modelling on the territory of the Republic of Srpska
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The paper describes the optimal model for coordinate transformation between ETRS89 and old national reference system in the Republic of Srpska. The Helmert`s parameters were estimated, based on a set of 1 741 common points. The average magnitude of residuals was 0.3 m per coordinate and the residual vectors were homogeneous at the local level. The basic model was complemented by a corrections grid that uses bilinear interpolation. The accuracy of the transformed horizontal positions obtained by this model is about 10 cm. In this way, a link between the ETRS89 and local reference system has been established on the overall territory of the Republic of Srpska.
Keywords:transformation of coordinates; Helmert transformation; ETRS89; national triangulation network; grid of residuals
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