Spectra Precision Survey Pro CE v3.6 User Manual - Manual (Page 349)

Survey Pro Reference Manual
R-192
Parabolic Curve
&XUYH 3DUDEROLF &XUYH or
Ctrl
-[N]
The Parabolic Curve screen provides detailed information on a
vertical parabolic curve when certain parts of the curve are known.
Known : The PVC or PVI radio button is selected
to define which point on the curve is known.
One of the following options must be selected
from the dropdown list:
•
Curve Length : is selected when the length of
the curve is known. When selected the
following must also be specified:
o Curve length : is the length of the vertical
curve (the horizontal distance between
the PVC and PVT).
•
Point On Curve : is selected when the location of another point on
the curve is known. When selected, the following must also be
specified.
o Station : is the station where the other point is located on the
curve.
o Elevation : is the elevation of the other point.
•
Hi/Lo Elevation : is selected when the high or low point for the
curve is known. When selected, the following must also be
specified.
o Hi/Lo Elevation : is the elevation of the curve at the location
where the tangent is zero (the crest of the curve).