Spectra Precision Survey Pro CE v3.6 User Manual - Manual (Page 114)

User’s Manual
108
Resection
The Resection screen allows you to occupy an unknown point and
compute its coordinates by shooting two to seven known points.
The accuracy of the computed occupy point depends on the following
factors:
• The number of known points that are shot
• The accuracy of the known point’s coordinates
• The position of the known points relative to the total station
To better explain this last statement, when planning the location of
the total station and the known points that you will shoot, try to
avoid a situation where the horizontal angle turned between two
known points is either near 0° or near 180°. Both of these scenarios
create large errors in the computed point when a small error is made
in measuring the horizontal angle. This is particularly true when
performing a two-point resection.
Performing a Resection
Setup the total station over the location where you want to compute
coordinates. Be sure that at least two known points are in view from
this location. (The known points must already be stored in the
current job.)
1. Tap
6XUYH\ , 5HVHFWLRQ .
2. Enter the occupy point name that you want
to compute in the Store Pt field.
3. Enter the number of known points that are
in view that you will shoot in the Total Resect
Points to Shoot field. You must shoot at least
two and no more than seven.
4. Enter the number of shots (forward and
reverse) that you want to take to each known
point in the
Shots per Resect Point field.