36
9.4 Column Offset Measurement
Sometimes we wish to obtain the coordinate of column center where we cannot
find. Fortunately, we can measure the distances of another points on the column,
in this time the plane offset measurement can be used. the figure is shown as
follow:
【
Procedure of Column offset measurement
】
1.Press F1:
【
Meas
】
to start EDM then you can
obtain the data of a point on the column which is
shown as the picture on the left.
2.Aim at the left edge of the column, get its
azimuth.
3.Aim at the right edge of the column, get its
azimuth.
4.The coordinates of the column center is
calculated and shown as the picture as the left.
P1
P2
P3
P0
Offset
(Col)
–
Prism
HR:
1
°
55'
42"
SD:
4.836
HD:
4.832
VD:
0.193
Meas
Mode Enter
Offset
(Col)
–
left edge
HR:
0
°
14' 19"
SD:
4.836
HD:
4.832
VD:
0.193
Mode Enter
Offset (Col)
–
Right edge
HR:
3
°
35'
23"
SD:
4.836
HD:
4.832
VD:
0.193
Mode Enter
Offset
(Col)
–
Center
HR:
1
°
54'
49"
N:
4.975
E:
0.166
Z:
0.693
Next
Mode