Spectra Precision Survey Pro v4.5 Ranger Reference Manual - Manual (Page 404)

Survey Pro Reference Manual
R-396
Spiral Layout
Curve Spiral .
The Spiral Layout screen is used to compute station locations on a
spiral curve.
Radius: is the radius of the circular curve.
Spiral Length: is the length along the spiral
curve from TS to SC.
TS station: is the station at the TS point.
; Interval : When checked, is the spiral arc
distance that is added or subtracted from the
Current Station
using the Sta + and Sta –
buttons.
Current Station: is the station on the curve
that is computed.
Solve : solves and displays the details for the specified spiral curve.
Sta - : decreases the Current Station by the specified Interval.
Sta + : increases the Current Station by the specified Interval.
Layout : computes the location of the Current Station.
Results
Station: is the current station.
Deflection: is the horizontal angle to the current station as if
occupying the TS and backsighting the Spiral PI.
Long crd.: is the chord length from the TS to the current station.
Short crd.: is the chord length from the previous station to the
current station.