References
==========

.. [Roberts_etal2017] Roberts, D. R., Bahn, V., Ciuti, S., Boyce, M. S., Elith, J., Guillera‐Arroita, G., et al. (2017). Cross-validation strategies for data with temporal, spatial, hierarchical, or phylogenetic structure. Ecography, 40(8), 913–929. https://doi.org/10.1111/ecog.02881
.. [Sandwell1987] Sandwell, D. T. (1987). Biharmonic spline interpolation of GEOS-3 and SEASAT altimeter data. Geophysical Research Letters, 14(2), 139–142. https://doi.org/10.1029/GL014i002p00139
.. [SandwellWessel2016] Sandwell, D. T., & Wessel, P. (2016). Interpolation of 2-D vector data using constraints from elasticity. Geophysical Research Letters, 43(20), 2016GL070340. https://doi.org/10.1002/2016GL070340
.. [Valavi_etal2019] Valavi, R., Elith, J., Lahoz‐Monfort, J. J., & Guillera‐Arroita, G. (2019). blockCV: An r package for generating spatially or environmentally separated folds for k-fold cross-validation of species distribution models. Methods in Ecology and Evolution, 10(2), 225–232. https://doi.org/10.1111/2041-210X.13107