Fig. 14

Confusion matrices in Evaluation 4. Example confusion matrices of the risk level classification for different risk probability threshold \(p_{threshold}\) values. The risk level classifiers were tested on the target data of slopes steeper than 5\(^\circ\), which were not used for training the model. With lower \(p_{threshold}\), more true high-risk data were correctly classified as high risk while miss-classification of true low-risk samples to high risk increased slightly. Results for the rough sand surface class are presented