Rapid and Precise Measurement Method for Track Static Geometry of Large-Span Bridge Railway

Table 1

Statistical parameter changes of residuals before and after registration in elevation direction.

	Max absolute value (mm)	Average (mm)	Standard deviation (mm)	Slope of trend-fitting line
Before registration	41.9	−9.0	10.5	−1.56 × 10^−4
After registration	24.0	3.1	6.1	−1.06 × 10^−5