BLE ntin
C Base Object
onvergence 6DmT
Angle (2) Distance (Bj Distance (D)
(m) (m) (mm)
1 2 3 4
o 1.1W 0.155W 0.0034
. 1.2W 0.735W 0.0101
© 1.3W 0.805W 0.0110
— 1.4W 0.875W 0.0120
1.5W 0.104W 0.0037
0.1W 0.273W 0.0200
0.2W 0.263W 0.0105
0.3W 0.259W 0.0076
0.4W 0.265W 0.0064
0.5W 0.293W 0.0061
© 0.6W 0.347W 0.0065
© 0.7W 0.414W 0.0073
QI 0.8W 0.485W 0.0082
0.9W 0.556W 0.0091
1.0W 0.626W 0.0101
1.1W 0.696W 0.0111
1.2W 0.766W 0.0122
1.3W 0.835W 0.0131
1.4W 0.904W 0.0142
1.5W 0.973W 0.0152
0.1W 0.254W 0.02080
0.2W 0.245W 0.01110
o 0.3W 0.248W 0.00830
4 0.4W 0.271W 0.00740
e 0.5W 0.314W 0.00741
C» 0.6W 0.372W 0.00790
0.7W 0.437W 0.00860
0.8W 0.505W 0.00950
0.9W 0.574W 0.01050
T E n
Convergence Base Object ÜDmT
Distance (B) Distance (D) (mm)
Angle (9) (m) (m)
1 2 3 4
1.0W 0.643W 0.01150
© 1.1W 0.712W 0.01250
© 1.2W 0.781W 0.01350
co 1.3W 0.849W 0.01460
1.4W 0.918W 0.01560
1.5W 0.986W 0.01670
0.1W 0.238W 0.0214
0.2W 0.230W 0.0117
0.3W 0.241W 0.0091
0.4W 0.274W 0.0083
Oo 0.5W 0.324W 0.0084
. 0.6W 0.383W 0.0089
e 0.7W 0.448W 0.0096
v 0.8W 0.514W 0.0104
0.9W 0.582W 0.0113
1.0W 0.650W 0.0122
14W 0.718W 0.0132
1.2W 0.786W 0.0142
1.3W 0.855W 0.0152
1.4W 0.923W 0.0162
1.5W 0.991W 0.0173
RATIO FROM CW) OR CH)
X10 1
1
12]
10
The optimum base distance 'B , the optimum object distance
IABLE 2
“D and the optimum theodolite elevation Éth at different
values of convergence angle
Convergence Optimum ; Optimum Optimum
Base Distance | Object Distance| Theodolite
Angle (9) : ;
B D Elevation (Éth)
(Degrees) (m) (m) (m)
1 2 3 4
5.0 1.3W 0.122W 0.50H
10.0 1.1W 0.155W 0.51H
20.0 0.5W 0.293W 0.51H
30.0 0.4W 0.271W 0.50H
40.0 0.4W 0.274W 0.50H
THE CFTIMUM BASE DISTANCE
—.— THE OPTIMUM OBJECT DISTANCE
—— THE OPTIMUM THEODOLITE ELEVATION
rig. 1.
40
mA
15 $0 25
30. 35
CONVERGENCE ANGLE(DEG)
60 45 50
The curves give the expected ratios É/H , ‘B/W end 'D/W et
convergence angle (8) for an object of width (W) end height (H) .
Up N AN OF Spd pue RR A Ud pd a OU»
I Nr ry a OT | Se ay Rm