Spiral spiral layout – Spectra Precision Survey Pro v5.0 User Manual
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Elevation: is the elevation for the current station.
Spiral
[Curve] [Spiral]
The Spiral screen will compute the details of a spiral curve, given the spiral length and radius.
Spiral length: is the length of the spiral curve.
Radius: is the circular curve radius.
[Solve]: computes the details of the spiral curve.
screen where the location of stations on the spiral curve can be computed.
screen.
Results
X of Throw: is the distance along the tangent where a perpendicular line intersects with the radius point.
Y of Throw: is the minimum distance between the tangent and the extended circular curve.
X: is the distance from the TS to the SC along the tangent.
Y: is distance from the SC to the tangent.
Delta: is the angle between the tangent, and the line between the PI and SC.
Spiral Layout
[Curve] [Spiral]
The Spiral Layout screen is used to compute station locations on a spiral curve.
Radius: is the radius of the circular curve.
Spiral Length: is the length along the spiral curve from TS to SC.
TS station: is the station at the TS point.
Interval: When checked, is the spiral arc distance that is added or subtracted from the Current Station using the [Sta
+] and [Sta -] buttons.
Current Station: is the station on the curve that is computed.
[Solve]: solves and displays the details for the specified spiral curve.
[Sta -]: decreases the Current Station by the specified Interval.
[Sta +]: increases the Current Station by the specified Interval.
Survey Pro Help 5.00
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