Trimble M3 Total Station User Manual

7 Coordinates
74 Trimble M3 Total Station User Guide
7.2 Resection
A resection sets up the station using angle/distance measurements to known points.
If it is not possible to occupy a point with a known position in order to sight the points
to be surveyed or set out, you can carry out a free stationing (or resection). If all
backsight points have a known height, the Z coordinate can be determined
simultaneously.
A maximum of 10 points can be measured. Measurements can be distance and angle,
or angle only. Calculations starts automatically when enough measurements are taken.
At least two sets of distance and angle measurement are required to determine the
station coordinate. After at least two measurements are taken, approximate
coordinates are calculated and residuals are displayed.
You can delete poor observations and recalculate if necessary. You can also select the
backsight (BS) point.
To go to the 3D station setup, press
[F1] with. To go to the 2D station setup, press [F3]
without press [ESC] to return to the Coordinates menu.
Note – The “3-D station setup” is also referred to as "known height" and "Z-coordinate".
Known point 1
Known point 2
Instrument
height
Station point
Z
Y

Trimble M3 Total Station Specifications

General

Brand	Trimble
Model	M3 Total Station
Category	Measuring Instruments
Language	English