Spectra Precision Survey Pro v4.5 Recon and Nomad Reference Manual - Manual (Page 383)

Curve Menu
R-375
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… : accesses the Curve Layout screen (Page R-377).
Traverse… : accesses the Traverse On Curve screen (Page R-382).