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Table 8 Scanner and total station merging port inspection

From: Evaluation of new target structure and recognition for point cloud registration and coordinates transformation of China’s large double-span bridge

Arch ribs

Parts

Length Combination (mm)

Y-Off-set (mm)

H-difference (mm)

2# Arch

rib right

Lower left

777.4

9.6

21.9

Lower right

777.5

7.3

19.1

Scanners Higher R

776.3

5.6

21.3

Total stations H-R

776.7

6.4

25.2

1# Arch

rib right

Lower left

769.2

4.1

-4.1

Lower right

765.1

3.6

-12.5

Scanners Higher-R

781.1

3.5

-9.0

Total stations H-R

776.5

5.5

-5.3