Spectra Precision Survey Pro v4.6 Ranger Reference Manual - Manual (Page 77)

Job Menu
R-69
Adding a Spiral
Tap the Arc / Spiral tab.
Curve: must be set to Spiral to enter a spiral
curve.
Radius: is the radius of the spiral curve. (The
same radius of the circular curve adjacent to
the spiral.)
Length: is the length of the spiral, measured
along the curve from the TS to the SC.
Turn: specifies if the spiral curve turns to the
Right
or Left as you occupy the initial point and
face the end point.
Direction: specifies if the curve runs from where the tangent
intersects with the spiral toward where the spiral intersects with the
curve (TS->SC) or if the curve runs from where the curve intersects
with the spiral toward where the spiral intersects with the tangent
(CS->ST).
Adding a Vertical Curve
Tap the Parabolic Curve tab.
; Apply Curve : must be checked to enter a
vertical at curve.
Grade at EVC / BVC is the known grade at
either the end of vertical curve or beginning of
vertical curve. The grade entered here is
determined by the selection made in the Auto-
Compute field.
Auto-Compute: will automatically compute
the grade at the selected point and display it at
the bottom of the screen. The grade at the
point that is not checked here must be specified
in the field defined above.