Use this option to assign elevations to the break points by interpolating.
This option can also be used to edit 3D lines.
The dialog box 'TenTable - Z-coordinates' will pop up with the button 'Heights' of the dialog box 'Create 3D - Line'.
The upper list area lists the break point number, coordinates, and chainage.
Manually assign elevations to the key break points (at least two distinct points).
Select (highlight) the break point from the upper list, for which elevation is to be manually assigned.
Use the field 'Height at this end point', define the elevation (meter), and confirm with the key 'Return'.
Repeat the same for other key break points.
The minimum requirement is that elevations are assigned for the first and the last points.
Define the break point numbers (extents of break points), for which interpolation is to be carried out using the fields 'From/To point number'.
Use the button 'Interpolate between these points to interpolate the elevations at break points.
Verify the change in the elevations in the upper list (Z coordinate).
Note: The function can be used to obtain calculated heights for the intermediary points. If elevations are defined for 3 or more points, first interpolate heights between the first two key break points and then between the next two points, and so on.
Tip: Instead of repeating the interpolation for a different section of the line, manually assign the elevations for all the break points, and use the function 'Height Interpolation' to interpolate heights for all the points.
For further details, refer to Height Interpolation.