Resection Calculation Dialog

Option	Description
Station
Target point	Enter the name and tag of the point to be created.
Destination surface	Select the surface on which the new point should be created.
Load button	Click to load the measurement details from the Observations & Figures data. The chosen observation data will be loaded into either First station or Second station depending on which had the focus at the time of pressing the button.
Preview result	Select this checkbox to have a preview of the calculation output displayed upon clicking Process. Only on accepting the preview will the calculation be adopted.

The Plan tab is for parts of the calculation relevant to the x-y coordinates.

Option

Description

First, Second and Third station

Enter the name of the relevant coordinated point

Observed direction

Enter the un-oriented direction from the target point to the relevant point. Note that directions must be used and not the subtended angles.

The Elevation tab is for parts of the calculation relevant to the z target coordinates.

Option	Description
Include in calculation	Select this checkbox for the elevation of the target point to be calculated by averaging the height difference from both the first and second station. The vertical angle and slope distance is used with the instrument height and target height. The “curvature and refraction” correction is applied. The output will have no z-coordinate information if this option is not selected.
Instrument Hgt.	Enter the instrument height of the first and second station.
Target Hgt.	Enter the target height at the first, second and third station.
Vertical Angle	Enter the vertical angles to the first, second and third stations observed at the target station.