Spectra Precision Survey Pro v4.6 Ranger User Manual - Manual (Page 122)

User’s Manual – Conventional Mode
112
Enter the point’s Ellipsoid Height to calculate
the Ellipsoid Scale Factor, and tap Solve>.
Review the calculated combined scale factor to
be used for ground to grid reductions. The
inverse combined factor is what you use for
grid to ground calculations.
Tap Accept to return to the Scale Settings
screen where the computed combined scale
factor will be entered for you.
Tap from the Scale Settings screen and from
the screen that follows (Job > Settings >
Surveying) to save the changes.
Grid Factor with Sea Level
You should select Use a grid factor with sea level
correction option when you have a single grid
factor and you want an elevation factor
calculated for each total station shot. The grid
factor you enter is combined with the elevation
factor for each shot to yield the combined factor
for that shot.
The grid factor may be provided or you can
calculate it using the Calculate Scale wizard.
This process is similar to the Use a single
combined scale factor option (Page 111), except
you are not prompted for an ellipsoid height
since the elevation portion of the scale factor is done for each shot as
sea level reduction.