Progressive-iterative approximation method
In mathematics, the progressive-iterative approximation method is an iterative method of data fitting with geometric meanings. Given a set of data points to be fitted, the method obtains a series of fitting curves (or surfaces) by iteratively updating the control points, and the limit curve (surface) can interpolate or approximate the given data points.
Source: Wikipedia — Progressive-iterative approximation method (CC BY-SA 4.0)