bookdown, devtools, grDevices, grid, knitr, lattice,
latticeExtra, plotrix, Rcpp (>= 0.11.3), rgdal, sf, sp, stats
bookdown, grDevices, grid, knitr, lattice, latticeExtra,
plotrix, Rcpp (>= 0.11.3), remotes, rgdal, sf, sp, stats