Section data can be processed to change the spacing of points on individual polyline by applying a rule to the whole group. The spacing of points is important as older analysis software is often limited by the amount of data it can use or by the limitations of the mathematics. Furthermore, the more data you have the longer it should take to process. Several options are available when changing the number of points on polyline sections.

- Define approximate spacing between points on each section
- Define the maximum number of points on each polyline section. Any polyline section with more will be reduced to the specified number with points distributed uniformly along the curve.
- Distribute the number of points on each polyline by specifying the number that should appear below a defined waterplane.
- Reduce the number of points on any polylines with more that the maximum number by iteratively removing the points with the smallest section curvature.

Knuckles can be accounted so that the definition of corners in the section are not when the points are repositioned. More detailed information is available on the Change Vertex Spacing Dialog.