Create circular arc segments for a line or alignment using a specified chord or arc distance.
Home / Tools / Create / 
Line or 
Alignment or 
Polygon / 
Circular Arc / 
Segment Distance
Solve module
Controls available depend on the object you are creating.
| Control | Description |
|---|---|
| Name | Type a name for the first point or generated object, or click  to increment to the next available name. |
| Start | Input the start vertex for the circular arc. |
| Centre | Input the centre vertex for the circular arc. |
| End | Input the end vertex for the circular arc. |
| Distance |
Select one of the following modes to input the segment distance.
|
| 3D circular arc |
|
| Clockwise |
Specify the direction of the arc:
|
- The circular arc segments are created automatically when the last vertex is picked if a value is already input into the Chord Distance or Arc Distance control. Otherwise, click OK to create the circular arc segments.
- Configure the distance type in Unit Options
- Toggle the Clockwise checkbox to view a preview of the arc in the opposite direction.
-
If the 3D checkbox is cleared:
- Heights are not used to compute the arc components.
- Lines will display as a circular arcs in the Plan view.
- Vertices heights are used to display the curve in 3D view.
-
If the 3D circular arc checkbox is selected:
- Distances input are interpreted as 3 dimensional distances.
- Heights are used to compute the arc components.
- True circular arcs display in the 3D view.
- The final segment may not be the full length.
- The heights of the created vertices will be interpolated based on the position along the linear object.
-
When creating an alignment:
- You can create 2D circular arcs only.
- This tool is available providing the Horizontal Standard in the create options is configured to 'None'.
