Spectra Precision Survey Pro v5.2 - Manual (Page 42)

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• Go to the Main Menu, then tap Survey > Station Setup.
• Choose Setup Type= Unknown Point/Resection.
• Use the Store Pt and Description fields to enter respectively the name and
description of the point where the instrument is set up. (This is a new point,
with unknown coordinates.)
• If you will ignore elevations in your job, check the 2D Survey box. You will
otherwise enter the height of instrument in the HI field.
• You can take one or more shots of each point. Enter the desired number of
shots in the
Shots per Resect Point field.
• You may want the instrument to perform either Direct and Reverse
measurements (recommended for station setup) or a Direct Only
measurement. Use the Sequence field to make this choice.
• Tap Next. This opens the Station Setup screen on which you should define
the following parameters:
– Resect Point: Enter the name of the first point used (PT1 for example).
– Option: Define the type of measurement you will perform on the point
(
Distance and Angle or Angle Only).
– Define the type of target used and its height ( HR).
• Tap Observe then Take Shot to start a measurement. You are then taken back
to the Station Setup screen where the measured point is listed as the first
point involved in the station setup.
• Repeat the previous two steps for the next point (PT2 for example), and
then for additional points (PT3, PT4, etc.) for data redundancy.
As you get new points, Survey Pro tries to compute a solution for the station
location.
When a solution is available, the RMS values of the solution are shown in
the lower part of the screen. If not a good contributor to the solution, any
measured point may be removed from the process by clearing the
corresponding check box. You will immediately see the impact of this point
removal on the quality of the solution.
Likewise you may reject the horizontal or vertical contribution of a point by
tapping on the corresponding “Yes” which will then be changed into a
blank field. Again, you will immediately see the impact of this change on
the quality of the solution.
• When you are satisfied with the results, tap Next. The screen then shows
the properties of the station setup. If you scroll down the list of results, you
will see the components of the final error ellipse for the solved point.
On this screen, Survey Pro defines one of the control points you have just
used in the resection method as a backsight point.