Distance Measuring With Stadia Lines - Leica T105 User Manual

Distance measuring with stadia lines

8 Wanted: Horizontal distance between station and target point.
SIMPLE method
12
D
V » 90°/
100 gon
1.
i
A
Procedure:
1. Set up instrument above point A
and level up.
2. Erect levelling staff exactly vertical
on point B.
3. Aim on staff (z=i) and read staff
section L.
Result:
D = 100 x L
Simple measurements
2.
3.
z
B
Reading:
Upper distance line:
Lower distance line:
Difference L:
Difference L in [cm] equals distance
D in [m]
17
16
L
15
14
166.2
150.0
16.2
26
ACCURATE method
D
V
i
A
Procedure:
Carry out steps 1 and 2 (see SIMPLE
method).
3. Aim on staff (z=i) and read staff
section L. Simultaneously, take
down zenith angle V.
Result:
D = 100 x L x sin²V
T105/T110-1.3.0en
3.
z
B