Curving and decurving polylines

Command: PEDIT

The Fit or Spline options of the Edit Polyline tool convert a multi-segment polyline into a smooth curve. The Fit option creates a smooth curve connecting all the vertices. The Spline option computes a smooth curve that is pulled toward the vertices but passes through only the first and last vertices.

The Decurve option removes Fit or Spline curves and arcs, leaving straight segments between the vertices.

To fit a curve to a polyline

Do one of the following:
Click the Edit Polyline tool button () on the Modify toolbar.
Choose Edit Polyline in the Modify menu.
Type editpline or pedit in the command window, then press Enter.

The command bar reads: Select polyline to edit.

Select the polyline.
The command bar reads: Edit polyline: Edit vertices/Close (or Open)/Decurve/Fit/Join/Linetype-Mode/Reverse/Spline/Taper/Width/Undo/<eXit>:
A prompt menu displays.
Do one of the following:
Choose Fit in the prompt menu of type F and press Enter.
Choose Spline in the prompt menu or type S and press Enter.


Original polyline	After applying Fit	After applying Spline

Do one of the following:
Continue editing the selected polyline.
Choose Done in the prompt menu or press Enter to conclude the Edit Polyline tool.

NOTES

Use the Decurve option in step 3 of the above procedure the restore the original polyline.
The SPLINESEGS (Spline Segments) settings variable controls the number of segments (lines or arcs) to be generated for spline-fit polylines.