Least Squares Adjustment(This functionality is available with the Adjustment module)
The Least Squares Adjustment command is used to display the Control File Editor. This editor may be used to create, edit and adjust control file observations, and create points in the data base with adjusted co-ordinates. The adjustment technique is Least Squares. (Refer to the Least Squares Theory topic for a brief discussion of this adjustment technique.)
Refer to the following Control File Editor menus for details about the various commands available:
Control files are created in this editor. They always have an ADJ extension. Note however that earlier versions of the system used CTL as the extension of the control files.
Control observations may be extracted into a control file from an existing field file. Alternatively control observations may be added manually.
Control observations by definition consist of the following types which may be automatically extracted from a field file:
- Observations to an instrument set up point;
- Observations to a fixed point of known co-ordinates;
- Multiple observations to the same point.
The following topics document the various commands and features of the Control File Editor.
Refer also to the following procedures, for further information about the processes involved in using the Adjustment command and the Control File Editor: