Spectra Precision Survey Pro v3.80 Recon iPAQ Reference Manual - Manual (Page 195)

Curve Menu
R-189
Compute Radius Point
&XUYH 5DGLXV 3RLQW
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:
• 5DGLXV : is the distance from the radius point to
the curve.
• 'HOWD : is the deflection angle.
• 'HJUHH $UF : is the deflection angle that results in a 100-ft.
arc length.
• 'HJUHH &KRUG : 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.
6ROYH : computes the location of the radius point.
/D\RXW« : accesses the Curve Layout screen (Page R-191).
7UDYHUVH« : accesses the Traverse On Curve screen (Page R-196).