User's Manual

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3) Input the name of backsight point, as same as the operation
of “STN” input;
4) Input backsight angle in the “BSA’ input box, then aim at
backsight point, and press the key [ENT] to return to the
interface of basic measurement.
6.3 Resection
This function adopts two or more points (the maximum of 5
points) to set station by angle measurement or distance
measurement. You can measure distance and angle or just angle
with this function. If the measured values are enough, it will
calculate the coordinate automatically. But the condition of
calculation is that at least distance measurement for two points
or angle measurement of three points, or together.
Y
Z
X
Station
（Xi,Yi,Zi）
X1
X0
Y0
Y2
Instrument
height
Known point 2
（X2,Y2,Z2）
Height 2
Height 1
Known point 1
（X1,Y1,Z1）
X2
Y1
The flow chart is as shown below