SPECTRA PRECISION FOCUS 2 SERIES TOTAL STATION USER GUIDE
A –
Design Road Line Data
149
Horizontal line
Horizontal lines are transmitted from the computer to the instrument through line elements,
including the initial definition. Included in the initial definition are the start point chainage and the
coordinate of this point. Line elements include point, straight, arc, and transition curve.
Record format: (KEYWORD) nnn, nnn [, nnn].
Example 1
START 1000.000, 1050.000, 1100.000
STRAIGHT 25.0000, 48.420
SPIRAL 20.000, 20.000
ARC 20.000, 23.141
SPIRAL 20.000, 20.000
STRAIGHT 148.300, 54.679
Example 2
START 1000.000, 1050.000, 1100.000
PT 1750.000, 1300.000, 100.000, 80.800
PT 1400.000, 1750.000, 200.000
PT 1800.000, 2000.000
Vertical curve
Vertical curve data is entered into the computer by point and chainage data. The vertical curve data
should include the elevation and curve length. The curve length of the start point and the end point
is zero.
Record format: Chainage, elevation, curve length
Example
1000.000, 50.000, 0.000
1300.000, 70.000, 300.000
1800.000, 70.000, 300.000
2300.000, 90.000, 0.000
START POINT
chainage, N, E
STRAIGHT
azimuth, distance
ARC
radius, arc length
SPIRAL
radius, length
PT
E, N[,A1,A2]
(A1, A2: LENGTH)