Spectra Precision Survey Pro v4.5 Ranger Reference Manual - Manual (Page 396)

Survey Pro Reference Manual
R-388
Traverse on Curve
Curve Trav. on Curve .
The Traverse on Curve screen will compute the PT and radius point
for a curve when the tangent azimuth at a PC point is known.
The first known part of the curve is defined by
one of the following:
• 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.
The second known part of the curve is defined by one of the following:
• Delta : is the deflection angle.
• Length : is the arc length.
• Chord : is the chord length.
• Tangent : is the distance from the PC or PT to the PI.
• Mid Ordinate : 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.
PC Point : is the point that defines the beginning of the curve (Point
of Curvature).
Azimuth / Bearing : is the direction of the tangent at the beginning
of the curve.
Turn: specifies if the curve turns to the Left or Right as you face the
curve from the PC.