# `make.interpolation` [`make.interpolation`](#digger.make.interpolation) will estimate the geometry of a landslide failure surface by interpolating between the landslide extent and user-defined xyz points. The following is typical usage for [`make.interpolation`](#digger.make.interpolation). :::{attention} No example has been developed for digger.make.interpolation. Should one be developed, it will be visible here. :::