Spectra Precision Survey Pro CE v3.6 User Manual - Manual (Page 139)

Screen Examples
133
6. Enter the station that you want to compute in the Current Station
field and tap
6ROYH.
7. Tap the
5HVXOWV tab to view the numerical information for the
location of the current station. Tap the
0DS tab to view a graphic
of the current station on the curve.
8. Tap
6WD to advance the current station by the specified station
interval or tap
6WD to subtract the station interval from the
current station.
Parabolic Curve Layout
The Parabolic Curve Layout screen is useful to compute the locations
of any station along a vertical curve when two parts of the curve are
already known. The values computed can be written down and used
to later stake those stations in the field.
1. Tap
&XUYH , 3DUDEROLF &XUYH from the
Main Menu.
2. In the Known field, select if the station and
elevation for the PVC or the PVI are
known by selecting the appropriate radio
button. Also specify if the
Curve Length ,
Point on Curve , or High/Lo Elevation is
known from the dropdown list. (The
remaining information that must be
entered will vary depending on the choice
made here.)
3. Fill in each field with the remaining information that pertains to
your parabolic curve and tap
6ROYH.
Note: The length of a parabolic curve is the horizontal distance from
the PVC to the PVT.
Note: The horizontal distance from the PVI to the PVC always equals
the horizontal distance from the PVI to the PVT