Spectra Precision Survey Pro v4.5 Ranger User Manual - Manual (Page 42)

User’s Manual
32
External Control File
When using an external control file, the points in the control file are
simply linked to the current job and do not become a permanent part
of the current job. Because of this, an external control file can later
be unlinked, or cleared from the current job.
Some users prefer to keep a set of known points in a separate control
file when repeatedly working on new jobs in the same general area.
That way when they return to the job site, they can create a new job,
but select the external control file to easily have access to the known
control points.
Once an external control file is selected, the control points can be
used in the same way as the job’s points with the following
exceptions:
• An external control file has read only attributes. This means
that the points in the control file cannot be modified or
deleted; they can only be read. For example, you can select a
control point to use as an occupy point during data collection
or as a design point during stake out, but you could not use a
control point for a foresight where you intend to overwrite the
existing coordinates with new coordinates. You would also be
unable to modify a control point from the Edit Points screen.
• Since the points in an external control file are shared with the
points in the current job, you cannot open an external control
file if any of the point names used in it are also used in the
current job. If you attempt to do so, a dialog will tell you that
a duplicate point name was encountered and the control file
will not be opened.