Abstract:Objective To improve the approximation accuracy and credibility of the GPS leveling fitting model in approximating the elevation anomaly surface. Methods Based on the summary of existing research results, a method of approximating the elevation anomaly surface by using the weighted comprehensive model of the finite element method and the moving method was proposed, and a second-order programming model was established. Results Through the calculation and analysis of the measured data, it was found that when the fitting mean errors of the finite element method and the moving method were 18.9 mm and 14.4 mm respectively, the fitting mean error of the weighted comprehensive model of the finite element method and the moving method was only 6.0 mm. Conclusion The approximation result of the weighted comprehensive model of the finite element method and the moving method was greatly improved compared with the approximation result of the single model, and it is an effective method for approximating the elevation anomaly surface.
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