Spectra Precision Survey Pro v5.3 - Manual (Page 79)

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Collecting Elevations for Sideshot and Stakeout Points
For some level turn, you have made your backsight measurement to the
previous turning point or benchmark. At this stage, the elevation of the
instrument is known.
Before completing the turn with a foresight measurement to the next
benchmark or turning point, you can shoot any number of sideshot or stakeout
points. These points are spurs to the loop, as they are never used in any
backsight measurements. They are stored in the job file, but are not part of the
level loop.
Typically with stakeout points, you will want to compare the measured
elevations to design points so you can compute cut/fill values.
Follow the instructions below to collect elevations of sideshot or stakeout
points in an open loop:
• For the next level turn, instead of t
apping Turn to Turning Point or Turn to
Benchmark, t ap Sideshot or Stakeout.
• Have your instrument and rods set up accordingly.
• Start the shooting sequence: First make a backsight measurement to the
last measured benchmark or turning point, then shoot the sideshot or
stakeout point. For a stakeout point, you will need to specify which point
you want to measure. This may be an already existing point or a point you
create on the spot.
• If your measurements are all good, tap Store Observation.
• Name the point and tap .
For a sideshot point, you just need to name the point ( Point field).
For a stakeout point, Survey Pro will ask you to name the as-staked point
(
Point field) and will suggest to add a default description for this point in
the form “pt<stakeout_point_name>” ( Description field).
NOTE: If you wish to collect a series of sideshot or stakeout points from the same
instrument setup, Survey Pro will ask you to perform foresight measurements
directly to the second and next points (no backsight measurements need to be
repeated in this case as Survey Pro has already collected these measurements for
the first of these points).
• When you are finished with the collection of your sideshot or stakeout
points, tap Turn to Turning Point or Turn to Benchmark to complete the level
turn. Once again, you will just have to perform foresight measurements to
this point, the backsight measurements having been already made.
• Start a new level turn.
Sx1
Sxn
Sideshot or
Stakeout Points
Sx1.. Sxn
TP3
TP4
FS FS
BS
BS