Table 6 Statistical comparison of elevation differences from precise trigonometric and second-order leveling (mm).
Point ID | Trigonometric height (m) | Second-order leveling elevation (m) | Elevation difference (mm) |
|---|---|---|---|
N1 | 2631.66132 | 2631.66225 | − 0.93 |
N2 | 2617.72416 | 2617.72552 | − 1.36 |
N3 | 2655.15150 | 2655.15300 | − 1.50 |
N4 | 2689.28789 | 2689.28982 | − 1.93 |
N5 | 2663.39021 | 2663.39186 | − 1.65 |
N6 | 2653.12764 | 2653.12849 | − 0.85 |
N7 | 2666.17288 | 2666.17437 | − 1.49 |
