Stake curve and offset, Curve and offset – screen 2 – Spectra Precision Survey Pro v4.9 User Manual
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is used to define the primary line used to determine the location of the line to be staked and the station
associated with the Start Point.
is used to define the offset distance and location, the station to be staked and the station interval.
provides the distance and direction information to the current station to be staked.
is used to stake the current station.
Stake Curve and Offset
[Stakeout] [Curve and offset]
The Stake Curve and Offset screen is used to stake stations on a curve or at an offset to it at fixed station intervals.
PC Point: is the starting point of the curve (point of curvature).
[PC Tangent Azm] / [PC Tangent Brg]: defines the azimuth or bearing, respectively, of the tangent at the PC Point.
[Radius] / [Degree Arc] / [Degree Chord]: defines the radius, degree, arc, or degree chord of the curve, respectively.
Turn: defines if the curve turns to the Left or Right from the point of view of the PC.
Begin Station: is the station assigned to the PC Point.
[Backsight…]: opens the
[Next>]: takes you to the second
screen, described below.
: opens the
Curve and Offset – Screen 2
Station to Stake: is the desired station on the curve that you want to stake.
Station Interval: is the value that is added to the Station to Stake after the [Next Sta] button is pressed.
[Next Sta]: advances the Station to Stake by the Station Interval.
Offset: is the horizontal distance of the offset from the specified curve. The offset occurs on the left (while viewing the
curve from the PC) when the L is selected or on the right when the R is selected.
Note: An offset of zero would result in the specified curve being staked.
[V. Offset]: will result in the elevations for the design points to be adjusted by the value entered here and will change
the cut / fill values accordingly. Design elevations will be lower when D is selected, and higher when U is selected.
[Grade]: specifies a slope from the specified curve to the curve that is being staked. When this is a non-zero value, the
elevation for the staked points will increasingly differ from the corresponding design elevations on the specified curve
as the Offset value increases.
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