Spectra Precision Survey Pro v4.6 Ranger User Manual - Manual (Page 127)

Mapping Plane Scale Factor
117
Some routines lack a point of reference for the
Apply Scale power button, or for scaling output
results. If you access one of these routines
while using a sea level scale factor you will
automatically be presented with the Scale
Factor wizard before the routine opens.
For most routines, you will not see this screen
since the reference point is already known.
Tapping Don’t Scale closes the Apply Scale
Factor wizard and the original routine will
continue without scale parameters. All results
will be shown in grid only.
Survey Pro uses the following rules to automatically identify a
reference point:
• When there is a single point control, this is the reference
point, such as with the COGO > Point in Direction screen.
• When there are multiple point controls, the first point is the
reference point, such as with the COGO > Intersection screen.
• When a routine uses a polyline, the first point that defines the
polyline is the reference point.
• When a routine uses an alignment, the POB is the reference
point.
Other Special Cases
• Stationing and station intervals are always in grid.
• The Map Check routine handles scale factors in a unique way.
There is no Apply Scale power button. Instead, the routine
treats all input without scale and shows results without scale.
However, if you tap the Add to Map button and a starting
point (location), you will get a prompt asking if you want to
scale all the inputs to grid.