Spectra Precision Survey Pro v4.5 Ranger Reference Manual - Manual (Page 389)

Curve Menu
R-381
Compute Radius Point
Curve Radius Point .
The Compute Radius Point screen is used to compute and optionally
store the radius point for a curve when certain parts of the curve are
known.
PC Point: is the point that defines the
beginning of the curve (Point of Curvature).
PT Point: is the point that defines the end of
the curve (Point of Tangency).
Turn: specifies if the curve turns to the Left or
Right
as you face the curve from the PC.
Arc: specifies if the arc is Small (less than 180°)
or Large (greater than 180°).
The final part of the curve is defined by one of
the following choices:
• Radius : is the distance from the radius point to the curve.
• Delta : is the deflection angle.
• Degree Arc : is the deflection angle that results in a 100-ft.
arc length.
• Degree Chord : is the deflection angle that results in a 100-ft.
chord length.
; Store RP : When checked, the computed radius point will be stored
with the name specified here.
Solve : computes the location of the radius point.
Layout… : opens the Curve Layout screen (Page R-384).
Traverse… : opens the Traverse On Curve screen (Page R-388).