Spectra Precision Survey Pro v4.6 Recon-Nomad Reference Manual - Manual (Page 394)

Survey Pro Reference Manual
R-386
Delta: is the deflection angle.
Tangent: is the distance from the PC or PT to the PI.
Mid Ord.: is the distance between the curve and the chord at the
center of the curve’s length.
External: is the minimum distance between the PI and the curve.
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.
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.