TOPCON OS SERIES TOTAL STATION AND MAGNET FIELD
OS Series Resection Setup Quick Guide
This Quick Guide is to show you how to setup and orientate the Topcon OS Series Total
Station using the Resection Method.
Principles of a
Resection
:
Resection is used to determine the coordinates of an instrument position (station point) by
performing multiple measurements of points whose coordinate values are known.
We need a minimum of two known points to perform a
resection, but the more points that are known and
used, the higher the precision of the calculated
instrument position. We would always recommend a
minimum of three known points to be used.
In this diagram you can see the Instrument is setup at
P0 and we have known points at positions P1 to P4.
We are going to use P1, P2 and P3 for our resection.
It is important to make sure that the battery is seated in the instrument prior to setting
the Total Station up as the weight of the battery will affect the level of the instrument.
Step One: Positioning the Instrument
1) Locate a position where you can observe at least two known
control points.
Make sure the Tripod legs are spaced at equal intervals and the
Tripod head is roughly level.
Make sure the Tripod feet are firmly fixed in the ground.
Tip: Set the height of the Tripod head at mid chest height to
ensure the telescope of the instrument is at eyelevel.
2) Place the Instrument on the Tripod head.
Supporting it with one hand, tighten the centring screw on the
bottom of the unit to make sure it is secured to the Tripod.
