"Parameter Reduction...":
Data sets are available at https://doi.org/10.15125/BATH-00594, accessed on 10 September 2021 under the Creative Commons Attribution 4.0 license.

"An Occupancy Mapping Method...":
Data sets are available at https://doi.org/10.15125/BATH-00594 (accessed on 15 November 2021) under the Creative Commons Attribution 4.0 license. The software implementation of the k-NN method is available at https://github.com/dlmiaoyu/KNNMapping (accessed on 15 November 2021).