Outlier elimination method of GPS data points based on Hough transform

Abstract

The electronic map of railway track can realize the monitoring and evaluation of line status, so as to reduce the workload of manual operation. In order to improve the fitting accuracy of the existing railway track electronic map, the measured data of the railway line are obtained by Global Positioning System (GPS), and the Gaussian coordinates of the measured data points are obtained through coordinate transformation. Based on the analysis of GPS data, the Hough transform is improved to eliminate the outliers in the straight track and curved track scenarios respectively. With the help of the idea of taking the average value of multiple measurements to eliminate errors, the processed data are corrected and the track line is fitted. The results show that the track route electronic map generated by the outlier elimination method based on Hough transform has high accuracy and has important practical significance and practical application value.