Prospects of using hybrid local coordinate systems based on SCS-2011

Abstract

The author presents the results of an experiment on the practical implementation of the methodology for creating a hybrid local coordinate system LCS_2011(95), based on SCS-2011, where flat rectangular coordinates coincide with similar ones in CS-95. The study was carried out in the Novosibirsk oblast, the territory of which is located within three 6° coordinate zones SCS-2011 (CS-95). It is shown that in order to create a LCS_2011(95) in a region that includes several such areas, it is required to use transformation algorithms adequate in terms of accuracy. The research confirmed high accuracy of creating a LCS_2011(95) in the territory located within three mentioned zones. The parameters of the orthogonal transition between SCS-2011 and LCS_2011(95) enabled making transformation of planned coordinates between these coordinate systems with a root-mean-square error (RMSE) of 7 cm. An independent assessment of the accuracy of the parameters, carried out by recalculating with their use from SCS-2011 to LCS_2011(95) the coordinates of 335 SGN control points, which were obtained through the satellite method in SCS-2011, confirmed the result. The RMSE of transforming the planned coordinates of 335 control points of the SGN from SCS-2011 to LCS_2011(95) was 8 cm. Prospects for using LCS for the conservation of spatial data funds created in CS-95, including those in territories extending in longitude for several 6° SCS-2011 (CS-95) coordinate zones, are shown