Spectra Precision Survey Pro v5.0 - Manual (Page 51)

Length: The horizontal length of the line.
Make this segment tangent to previous: When checked, the specified line will be tangent to the ending tangent of the
previous segment.
Note: When making a new horizontal segment tangent to the previous segment, the new segment will appear in the
Edit Alignment screen tagged with a (P). This means that if the previous horizontal segment is edited or deleted, where
the orientation changes, all subsequent horizontal segments that have the (P) tag will also be adjusted so they will
remain tangent to the previous segments. This does not hold true for vertical alignment segments. Vertical segments
will always begin with the specified starting grade unless they are manually modified.
[Azimuth] / [Bearing]: Used to enter a known azimuth or bearing of the line.
: Adds the line to the current horizontal alignment.
Edit Segment - Arc (Horizontal Curve) Card
The Arc card is used to add a horizontal curve to the alignment.
The curve can be defined by two of the following:
[Radius]: The distance from the radius point to the curve
[Delta]: The internal angle from center to tangent points.
[Degree Arc]: The internal angle equivalent to a 100-ft arc length.
[Degree Chord]: The internal angle equivalent to a 100-ft chord length.
[Length]: The arc length.
[Chord]: The chord length.
[Tangent]: The distance from the PC or PT to the PI.
[Mid Ord]: The distance between the curve and the chord at the center of the curve's length.
[External]: The minimum distance between the PI and the curve.
Turn: Specifies if the curve turns to the Left or Right as you face the curve from the beginning.
Make this segment tangent to previous: When checked, the start of the specified curve will be tangent to the ending
tangent of the previous segment.
[Azimuth] / [Bearing]: Used to enter a known azimuth or bearing at the start of the curve.
: Adds the curve to the current horizontal alignment.
Edit Segment - Spiral Card
The Spiral card is used to add a spiral curve to the alignment.
Radius: The radius of the spiral. (This equals the radius of the horizontal curve tangent to the spiral.)
Length: The length of the spiral.
Turn: Specifies if the curve turns to the Left or Right as you face the curve from the beginning.
Survey Pro Help 5.00
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