Interpolating point spread function anisotropy | Astronomy & Astrophysics (A&A)

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Table 2

Spatial interpolation methods reviewed in this article.

Interpolation method	Scope	Exactness	Model

Polynomial fitting	global	approximate	deterministic
Basis splines	global	approximate¹	deterministic
Inverse distance weighting	local	exact²	deterministic
Radial basis function	local	exact³	deterministic
Ordinary Kriging	local	exact⁴	stochastic

Notes.

⁽¹⁾

Can be made exact by disabling smoothing.

⁽²⁾

Smoothing possible with specific algorithms.

⁽²⁾

Some Kriging algorithms are approximate.

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