Spectra-precision Survey Pro v4.6 Recon-Nomad Reference Manual Manuale Utente Pagina 82

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Survey Pro Reference Manual
R-74
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 : is used to enter a known azimuth or bearing
at the start of the curve.
: adds the curve to the current horizontal alignment.
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