Backsight to known point and traverse

The station has been placed on a point with known coordinates and the orientation is determined through the measurement of a reference point with known coordinates and a foresight traverse point.

Select Yes. Station position is known.

Select Backsight to known point and traverse.

Define the traverse settings.

• Measurements order:

  • BS1-FS1-FS2-BS2: all points are measured in face I, then measured in face II.

  • BS1-BS2-FS1-FS2: backsight point is measured in face I immediately followed by face II. Other points are measured in face I, face II order.

• Auto aim: enables/disables the aim functionality with robotic total stations.

• Number of sets: the number of measured sets.

Click Accept to proceed to define the station setup.

• Station: name of the station. Select a point existing in the job.

• Instrument height: elevation of the total station from the ground. It is possible to calculate the height of the instrument.

• Code: code to assign to the station point in case a new point is created.

• E, N, Z: coordinates of the station. When an existing point was selected, the values cannot be edited.

Click Atmospheric coeff to change the atmospheric coefficients.

Click Next to proceed to define the backsight point.

• Point: specify the reference point which must be measured for the calculation of the station orientation.

• Azimuth: the azimuth between the position of the station and the reference point is calculated.

• Circle: define how to set the horizontal angle of the station:

  • Current value: the angle of the station is not modified.

  • Zero: the angle of the station is reset to the reference point.

  • Azimuth: the angle of the station is set to the azimuth value.

• Press Next to measure the backsight point.

  

Aim the point of orientation.

Tap Measure.

The procedure guides to measure the backsight point, the next foresight traverse point in direct and reverse face and checks the errors.

When stationing is completed, the procedure guides to move to the next traverse point and continue the process with the backsight of the previous traverse point.