摘要
The article presents a methodology for transitioning to the Amsterdam height system based on utilizing global and regional geoid/quasi-geoid models.The study was conducted for the Polish-Ukrainian cross-border sector and expanded to the entire territory of Poland and Ukraine.The input data comprised two regional and five global geoid/quasi-geoid models.The initial data analysis was conducted for all models relative to GNSS/leveling data in the Baltic height system.The secondary analysis was performed relative to the combined PL-quasi-geoid2021 model and the gravimetric EGG2015 model.Based on the analysis results,a methodology for optimizing heights between regional and global geoid/quasi-geoid models was developed,including the following stages:calculation of conditional global and regional geoid/quasi-geoid heights,calculation of approximately predicted height differences between the conditional regional and global geoid/quasi-geoid,implementation of the refinement(correction)of approximate heights at the regional model,optimization of approximate heights at the regional model,and calculation of a regional combined model in the Amsterdam height system.The developed methodology enables the integration of regional and global geoid/quasi-geoid models into the Amsterdam height system with an accuracy of 1-2 cm by optimizing their heights.The advantage of this methodology is that it requires only a minimal amount of GNSS/leveling data to establish connections between different height systems.
