Angular accuracy:
0.5" = 1.5432*10-4 gon =>
σ
Hz,V =
0.5" *
EDM accuracy:
1 mm + 1 ppm for standard mode
Slope distance:
150 m
Hz:
210 gon
V:
83 gon
1D CQ = 0.00058 m 0.6 mm
2D CQ = 0.00122 m 1.2 mm
3D CQ = 0.00135 m 1.3 mm
Working Example 4
Instrument:
TM50
Angular accuracy:
0.5" = 1.5432*10-4 gon =>
σ
Hz,V =
0.5" *
EDM accuracy:
1 mm + 1 ppm for standard mode
Slope distance:
7000 m
Hz:
210 gon
V:
83 gon
1D CQ = 0.02324 m 23.2 mm
2D CQ = 0.02521 m 25.3 mm
3D CQ = 0.03429 m 34.3 mm
One cross section is valid until a new one is defined at a chainage ahead. Cross
section definition can be at any chainage. The chainages need not necessarily
correspond to chainages where a design element starts or ends.
A Cross section gives a profile view. It requires vertical alignment or actual ele-
vation on each chainage.
The elements involved are straight elements. The points are called vertices. You
can optionally define slopes at the vertices most left and most right.
Points are defined by:
•
DH and DV
•
DH and slope in percentage
•
DH and slope in ratio
For horizontal alignments: Circular curve with constant radius.
For vertical alignments: Circular vertical curve with constant radius.
I.4
D
The hardware which is connected to the chosen port.
For GS: Devices are used to transmit and receive real-time data and to commu-
nicate with the instrument, for example to download raw observations from a
remote location.
Cross section assign-
ments
Cross section tem-
plate
Curve
Device
Glossary
1045
