For the GPR model trained on the Fe Kim et al. dataset, the 1st NN path and the GPR path have substantial qualitative deviation from each other for Σ3, Σ9 and Σ3, Σ11 paths. While the GPR model suggests that Σ3, Σ11 are connected, the 1st NN path suggests that there are local minima that are overestimated. Likewise, the 1st-6th NNs (colored, variable-size circles) for Σ3, Σ5 and Σ3, Σ7 follow the general trend of the models. We observe that all NNs distances up to the 6th NN are less than ∼6°from the paths of interest; this in turn is less than the global correlation length of 8.3°from Section 3.2.1 which indicates that local regions of influence along these paths in the Fe dataset are densely populated.