---
title: Spline
description: A spline is a smooth curve that passes through or near a given set of points. You can control how closely the curve fits the points. The SPLINE（SPL） command creates a particular type of spline known as a nonuniform rational…
url: "https://www.dwgsee.com/cad/support/docs/spline/"
updated: "2025-01-13"
category: User Guide / Create Objects
tags:
  - Command Line
  - Spline
---

# Spline

A spline is a smooth curve that passes through or near a given set of points. You can control how closely the curve fits the points.

The SPLINE（SPL） command creates a particular type of spline known as a nonuniform rational B-spline (NURBS) curve. A NURBS curve produces a smooth curve between control points.

![](https://dwgsee.com/cad/support/wp-content/uploads/2025/01/spline-300x257.png)

You create splines by specifying points. You can close the spline so that the start and endpoints are coincident and tangent.