Supplementary material 1 from: Clarke S, Stenekes N, Kancans R, Woodland C, Robinson A (2018) Undelivered risk: A counter-factual analysis of the biosecurity risk avoided by inspecting international mail articles. NeoBiota 40: 73-86. https://doi.org/10.3897/neobiota.40.28840

Variogram of the residuals of the random forest model
: Explanation note: A variogram designed to visually assess whether there is spatial correlation present in the residuals of the random forest model. This does not indicate any spatial correlation.