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5.3 MEASURING DISTANCE USING THE
STADIA LINES
The stadia lines etched on the reticle can be used
for distance measurement.
1) Sight the staff, and count the number of centime-
ters, , between the two stadia lines. (Fig.5.6)
Fig.5.6
2) This number is equivalent to the distance in
meters between the staff and the instrument.
Example:
If the length ( ) is 32 cm, the horizontal distance
from the instrument center A to the staff B is 32 m.
Fig.5.7
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