Spectra Precision Survey Pro v4.5 Recon and Nomad Reference Manual - Manual (Page 389)

Curve Menu
R-381
• External : is the minimum distance between the PI and the curve.
PC Station: is the starting station assigned to the PC.
; Interval : When checked, all necessary information for each station
at the specified interval on the curve will be computed.
Start station: When not computing by interval (above), only the
information for the particular station entered here is computed.
Solve : will solve and display all the details of the specified curve,
without the layout information.
Sta - : decreases the current station by the station interval.
Sta + : increases the current station by the station interval.
Layout : will solve and display the layout information for all the
stations of the specified curve.
Results
Radius: is the distance from the radius point to the curve.
Length: is the arc length.
Chord: is the chord length.
Delta: is the deflection angle.
Tangent: is the distance from the PC or PT to the PI.
Mid Ord.: is the distance between the curve and the chord at the
center of the curve’s length.
External: is the minimum distance between the PI and the curve.
Deg. Arc: is the deflection angle that results in a 100-ft. arc length.
Deg. Chord: is the deflection angle that results in a 100-ft. chord
length.
Segment: is the area between the arc length and the chord.
Sector: is the area between the arc length and the two edge radii.
Fillet: is the area between the arc length and the tangents.