Topcon GPT-2009 Marine Instruments User Manual


 
5-3
5 COORDINATE MEASUREMENT
5.4 Execution of Coordinate Measuring
Measure the coordinates by entering the instrument height and prism height, coordinates of unknown
point will be measured directly.
When setting coordinate values of occupied point, see Section 5.1 “Setting Coordinate Values of
Occupied Point”
When setting the instrument height and prism height, see Section 5.2 “Setting Height of the
Instrument” and 5.3 “Setting Height of Target (Prism Height)”.
The coordinates of the unknown point are calculated as shown below and displayed:
Coordinates of occupied point : (N
0
,E
0
,Z
0
)
Instrument height : INS.HT
Prism height : R.HT
Vertical distance (Relative elevation) : z (VD)
Coordinates of the center of the prism,
originated from the center point of the instrument : (n,e,z)
Coordinates of unknown point : (N
1
,E
1
,Z
1
)
N
1
=N
0
+n
E
1
=E
0
+e
Z
1
=Z
0
+INS.HT+z - R.HT
Operating procedure Operation Display
1 Set the direction angle of known point A. *1)
2 Collimate target prism.
Set direction
angle
Collimate P
3 Press the [ ] key.
Measuring starts.
The result will be shown.
[]
*1) Refer to Section 3.3 “Measuring from the Required Horizontal Angle”.
In case the coordinate of instrument point is not entered, (0,0,0) will be used as the default for the
instrument point.
The instrument height will be calculated as 0 when the instrument height is not entered.
The prism height will be calculated as 0 when the prism height is not set.
Origin (o, o, o)
Occupied point (No, Eo, Zo)
Center point of the instrument
(No, Eo, Zo+INS.HT)
Coordinates of the center of the prism, originated from the
center point of the instrument (n, e, z)
Unknown point
(N
1, E1, Z1)
V : 90°10'20"
HR: 120°30'40"
0SET HOLD HSET P1
N*[r] << m
E: m
Z: m
MEAS MODE NP/P P1
N* 123.456 m
E: 34.567 m
Z: 78.912 m
MEAS MODE NP/P P1