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• Then read the staff at point B and obtain the reading as “b”
Example: b = 1.224m
• The difference a-b is the AB height difference “h”
Example: h = a - b = 1.735m - 1.224m = 0.511m
2.3.3 Stadia Measurement
Read the staff and count the difference of L between two stadia lines (fig. 7)
Upline: 1.480m
Downline: 1.328m
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Fig. 6