JuliaEarth/GeoStats.jl

Implement `@formula` support in `Kriging` model

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#573 opened on Apr 11, 2026

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Description

Currently, our Kriging model allows the specification of the mean as a vector of values. Each value is associated with a covariate and can be a constant (simple Kriging) or a function (Universal Kriging). It would be convenient to specify a @formula from StatsModels.jl as an alternative (regression Kriging).

Contributor guide

Tech stack
None
Domain
data
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
Understanding of Kriging modelsFamiliarity with @formula syntax from StatsModels.jlBasic knowledge of GeoStats.jl
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40
Research direction
Examine the current implementation of Kriging model in GeoStats.jl, specifically how mean is handled. Study the StatsModels.jl @formula language and its integration. Propose an API to allow @formula expressions in place of vector mean. Consider regression kriging as described in the linked Wikipedia article.