Sokkia iM-50 Series Operator's Manual page 61

10.If there are problems with the results of a point, align the
cursor with that point and press [OMIT]. "*" is displayed on
the left of the point.
11. Press [RE_CALC] to perform calculation again without the
point designated in step 10. The result is displayed.
If there are no problems with the result, go to step 12.
If problems with the result occur again, perform the resection
measurement from step 4.
12.Press [OK] to finish resection measurement. Only Z
(elevation) of the instrument station coordinate is set. N and
E values are not overwritten.

Resection calculation process
The NE coordinates are found using angle and distance observation equations, and the instrument station
coordinates are found using the method of least squares. The Z coordinate is found by treating the
average value as the instrument station coordinates.
13. SETTING INSTRUMENT STATION
1 s t
2 n d
3 r d
4 t h
OMIT
Calculated instrument
station coordinates set
as hypothetical coordinates
56
Z
- 0 . 0 0 3
- 0 . 0 0 3
0 . 0 0 0
0 . 0 0 2
RE _ CALC RE _ MEAS
ADD