Spectra Precision Survey Pro CE v3.6 User Manual - Manual (Page 336)

Curve Menu
R-179
Results:
Radius : is the distance from the radius point to the curve.
Length : is the arc length.
Chord : is the chord length.
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.
Delta : is the deflection angle.
Tangent : is the distance from the PC or
PT to the PI.
External : is the minimum distance
between the PI and the curve.
Mid Ord. : is the distance between the
curve and the chord at the center of the
curve’s length.
External : (not shown) The minimum
distance between the PI and the curve.
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.
Ta
n
g
e
n
t
Ta
ngent
Length of Curv
e
10 0’ A
rc
Radius
Delta
Radius
100
’ C
hor
d
Mid-Ordinate
Deflection
Angle (Delta)
Long Chord
PC
BC
PI
PT
EC
D
eg
. Ch
ord
D
eg
. Arc
Fillet
Sector
Segment