Reduce Sets

Use this dialog to reduce sets. The function analyzes conventional observations and estimates average (mean) sets per station from the original measurements where multiple sets are recorded.

Where to find the dialog?

On the land surveying toolset in the terrain model drawing, select the Reduce Sets... icon.

About the function

The function is located at the far left of the toolbox to indicate that this should be done before starting analysis and calculations.

If the sets are reduced, you can also reset them using this function.

Note

You can choose to average sets without zero-reducing to the first point. This is a setting in the application layer under the analysis parameters tab.

Measurement setup requirements

To reduce sets, the program requires a structure in the measurement setup where each station is a half set, and each setup is measured in the same structure. The program supports the following measurement setups:

• ABC-ABC: The entire round is measured in the first telescope position, then the round is measured again in the same order in the second telescope position.

• ABC-CBA: The entire round is measured in the first telescope position, then the round is measured backward in the second telescope position.

• AABBCC-AABBCC: All points in the round are measured twice, first in the first telescope position and then in the second telescope position.

• AABBCC-CCBBAA: All points in the round are measured twice in the first and second telescope positions, then the round is repeated backward.

Potential issues

When splitting set measurements, the program will try to interpret the measurement setup into one of the mentioned structures. If there is a break in the structure, for example, if the same point is measured twice in the same telescope position, the split will fail, and you may have trouble reducing sets.

Info

See the general user documentation for more details.