Table of Contents
### Splines

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Splines are smooth curves that pass through a series of points and are typically used to create irregularly shaped curves. Although you can convert a polyline into a spline-fit polyline, which you will see later in this book, this is done by approximation, and the result does not give you what is defined as a true spline. The Spline command generates true splines, or nonuniform rational b-splines (NURBS). These spline elements are more accurate mathematically, and they also help create smaller drawing files than spline-fit polylines.

Tip 49 from

One of the best reasons to use splines over fit or spline-curve polylines is that splines maintain their true shape after editing. Using editing commands such as Trim or Break, which are discussed in Chapter 9, "Not All Objects Can Be Edited This Way," remove the spline definition of fit or spline-curve polylines. Splines, on the other hand, retain their shape.