Create a new traverse

1. Click the ET Traverse button to open ET Traverse Dialog

2. Activate the Add Course tab

3. Adjust the Direction Type, Direction Units, Linear and Angular precision 

4. Set the Start Point of the traverse

   • input the coordinates using or

   • use the Set Start Point tool to set it by clicking on the map

5. Select the type of course (Straight, Curve or Tangent Curve) from the combo box. Note: Tangent Curve cannot be used a a first course of a traverse

6. Select the type of inputs to be used

   • Options for Straight Courses available

     • Direction-Distance

     • Angle - Distance (cannot be used for the first course of a traverse)

     • dX - dY  - X and Y difference from the Start Point of the traverse or the end point of the previous course

     • X - Y - absolute X & Y of the end point of the course (can be set interactively using the available tool )

   • Options for Tangent and Non-tangent curves

     • Chord-Angle (Chord length - Central angle of the curve)

     • Chord-Arc (Chord length - Length of the Arc)

     • Chord-Radius (Chord length - Radius of the curve)

     • Arc-Angle (Length of the Arc - Central angle of the curve)

     • Arc-Radius (Length of the Arc - Radius of the curve)

     • Radius-Angle (Radius of the curve - Central angle of the curve)

7. Fill the values for each input

8. Click the Add Course button the course will be added to the Traverse Table (View/Edit Traverse tab) and as a graphic to the view.

Repeat the steps from 5 to 8 to add more courses.

Once all courses have been added to the traverse, click the Finish button to add the traverse to the Target layer.

See also Close/Adjust traverse.

Notes:

• At any time you can switch to the View/Edit Traverse tab to view the descriptions of the courses, delete or edit one or more courses.

• You can edit the Start Point of the traverse at any time 

• Use the tools on the Quick Direction panel to set the direction for perpendicular courses or get direction from an existing feature (the direction of the closest segment to the point clicked will be used)

• If you want to save some attributes together with the traverse - activate the Attributes tab  and input the values.

• Since the Shapefiles cannot store true arcs, if the source of the target layer is a Shapefile the arcs will be converted to their linear approximation.

Edit an existing feature using its traverse.

1. Activate View/Edit Traverse tab

2. Use the Get Traverse tool to select a feature from the Target layer. The description of all the courses participating in the geometry of the feature will be populated in the Traverse Table.

3. Modify one or several courses

   • Edit course (double click on a course or select a course and click button)

   • Delete course (select a course and press "Del" or click button)

   • Add course to the end of the traverse 

   • Change the Start Point ( button or tool)

   • Modify attributes (go to Attributes tab)

4. When happy with the edits click the Finish button to save the changes.

Make a duplicate of an existing feature using its traverse.

1. Activate View/Edit Traverse tab

2. Use the Get Traverse tool to select a feature from the Target layer. The description of all the courses participating in the geometry of the feature will be populated in the Traverse Table.

3. Click the Toggle action button . The action (top right corner of the dialog) will change from EDIT to ADD. This indicates that the current traverse will be saved (on clicking the Finish button) to a new feature

4. Modify one or several courses

   • Edit course (double click on a course or select a course and click button)

   • Delete course (select a course and press "Del" or click button)

   • Add new course to the end of the traverse 

   • Change the Start Point ( button or tool)

   • Modify attributes (go to Attributes tab)

5. When happy with the edits click the Finish button to save the new feature

Export current traverse.

1. Activate View/Edit Traverse tab

2. Click on the Export Traverse button

3. Select output folder and a file name

4. Click Save

Note: You can export the traverses of existing features - Use the Get Traverse tool to select a feature from the Target layer. Then follow the procedure above

Importing traverses from a text file.

1. Activate View/Edit Traverse tab

2. Click on the Import Traverse button

3. Select a traverse file

4. Click Add

Note: Check the format of the Traverse File

Close- Adjust traverses

1. Activate the Adjust tab.
2. If the traverse is Loop, the X and Y values are populated automatically. If you have a Link traverse, you need to enter the X and Y coordinates of the end point of the traverse in order to be able to calculate the Misclosure and Adjust the traverse. 
3. Click Calculate Misclosure: the Misclosure will be reported in the units of the dataset and  relative to the length of the traverse.
4. Click Adjust: The traverse will be adjusted using the Compass rule (also known as Bowditch rule). This rule applies a proportional adjustment,  the distances between the stations are used in proportion to the total distance of the traverse. The result of the adjustment will be displayed as a graphic on the view.
5. If the results of the adjustment are acceptable, click Accept button. The adjusted traverse will be populated in the View/Edit Traverse tab. 

Copyright © Ianko Tchoukanski