Traverse File Editor

(This functionality is available with the Input / Output module)

The Traverse File Editor is displayed after selecting the Field Transfer/Resolve/Traverses command. It is used to create, edit and adjust traverse file observations, and create points in the data base with adjusted co-ordinates.

The colours used in the Traverse File Editor are set using the Utilities/Configure/Colours/Table command.

Tool Used to
Cells: Display the data in the currently open traverse file and to select the active cell enabling its value to be edited.
The currently active cell is highlighted with a border.
The currently active cell is selected by clicking the required cell with the mouse or by using the arrow or Tab keys to move the border to the required cell.
Obs. Column Display the observation record number and to select an entire observation record for editing.
Select a record number with the mouse to select the entire record.
From Column Display the station point identifier from which an angle observation was observed. It must be empty for bearing observations.
At Column Display the station point identifier at which the observation was observed. This column contains the instrument set up point identifier. It must contain an identifier for:
  • -each observation record
  • -any reference object point at the start or end of a traverse for which co-ordinates need to be entered.
To Column Display the point identifier to which the observation was observed. It must contain an identifier for each observation record.
Angle Enter the angle measurements.
These must be Angles measured clockwise between the From and To points. The From, At and To cells must contain point identifiers.
Bearing Enter the bearing measurements.
These must be Bearings from the At point to the To point. The From cell must be empty; the At and To cells must have point identifiers.
Note that a bearing is an orientated direction.
A traverse file must consist of:
-bearing observations only
or
-angle observations only
You may not mix bearings and angle observations. However, you may combine a bearing to a reference object at the start or end of a traverse, with angle observations in between.
A reverse bearing may be entered by adding a negative suffix to the entered bearing.
Distance Display the distance measurements.
The distance is considered by the adjustment process to have been already reduced for slope.
For any one traverse file the distances must be all of the same type in relation to the geodetic corrections that have been applied. That is they must all be:
  • -Ground distances (uncorrected for mean sea level, geoidal separation and scale factor), or
  • -Ellipsoidal distances (corrected for mean sea level and geoidal separation), or
  • -Grid distances (corrected for mean sea level, geoidal separation and scale factor).
The distance type is set in the Solve/Corrections command.
Distances of a unit type not currently set maybe input by adding a suffix after the entered distance. These suffixes are:
  • L or l - Links,
  • F or f - International Feet
  • U or u - US Feet
  • M or m - Metres.
Radius Display a radius.
If a radius is present, then the observation refers to an arc and the traverse area will include the area of the arc sector. The distance may then also be treated as an arc distance or a chord distance depending on the Options/Set as arc toggle.
Diff. Elev. Display an observed height difference.
East, North & Elevation Columns Enter the co-ordinates of the At point for the start and end points of the traverse. Alternatively they may be retrieved from the data base using Options/Retrieve Co-ordinates.
They will be shown as fixed co-ordinates in the colour set for "Not Computed" (default is red) in the Utilities/Configure/Colours/Table. If you inadvertently have any fixed co-ordinates against points that are to be adjusted, swipe and delete them before trying to adjust.
When an adjustment or compute process is performed, the co-ordinates for the adjusted points will also be shown.
Point Code Display the feature code of the At point.
Point Description Display the description of the AT point
Line Code Display the line code of the traverse leg between the At point and the To point
Line Description Display the line description of the traverse leg between the At point and the To point
Tool Bar The following special tools are available in the Traverse Editor.
traverse tools
The tools run the following commands (in order from left to right).
Tool Used to
File/New Create a new untitled traverse (.trv) file.
File/Open Open an existing traverse (.trv) file.
File/Extract Extract control observations from a field file.
File/Save Save the currently open file to disk.
Edit/Cut Row Cut the selected row to the clipboard.
Edit/Copy Row Copy the selected row to the clipboard.
Edit/Paste Row Paste a row from the clipboard to the editor.
Edit/New Traverse Create a new traverse in the currently open traverse file. There may be up to 255 interrelated or nested traverses in a traverse file.
Edit/Delete Traverse Delete the current traverse.
Edit/Move/Copy Traverse Open the Move or Copy traverse dialog.
This dialog is used to either move a selected traverse in the displayed list to the end of the list, or create a copy of the current traverse.
Traverse/Properties Open the Traverse Properties dialog.
This dialog is used to display and edit the name of the current traverse and its code.
The Code list shows all available codes in the currently configured code table set in the Utilities/Configure/Code Table command. The selected code will be used for any lines that are created when the traverse is computed.
Options/Set As Arc Toggle whether a distance is an arc or chord. To use this tool, a radius field must first be selected. If the distance is to be treated as an arc, then the radius value will be in the colour set for arcs in the Utilities/Configure/Colours/Table command.
Options/Set Radiation Toggle whether an observation is to be treated as a radiation. Radiations are shown underlined and are not part of the traverse.
Options/Retrieve Co-ordinates Retrieve co-ordinates from the currently open database and place them in the Control File Editor