geostatistics-interpolation
Installation
SKILL.md
Geostatistics & Interpolation
Purpose: interpolation that reports what it doesn't know. The difference between a professional product and a pretty raster is the uncertainty surface and an honest cross-validation — both are non-optional here.
Method selection
| Situation | Method |
|---|---|
| Dense, smooth phenomenon, quick look | IDW (report power parameter; test 1-3) |
| Physical phenomenon with spatial structure, need uncertainty | Ordinary kriging (default professional choice) |
| Clear trend (elevation gradient, coastal effect) | Universal kriging or regression kriging on covariates |
| Strong covariates available (DEM, land cover, distances) | Regression kriging / random-forest residual kriging |
| Categorical target | Indicator kriging |
| Honeycomb-free tessellation, no extrapolation wanted | Natural neighbor |
IDW is a reasonable baseline but has no error model and bullseyes around extremes; say so when delivering IDW-only products.