Dean presented some background about kriging, random fields, covariances, and Kronecker products, and also demoed the snapKrig R package that is fast and can handle large gridded (raster) data sets compared to some of the other packages.
snapKrig on GitHub: https://github.com/deankoch/snapKrig
snapKrig on CRAN: https://CRAN.R-project.org/package=sn...
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