You can install rBDAT from gitlab via:
if (! require("remotes")) install.packages("remotes")
remotes::install_gitlab("vochr/rBDAT", build_vignettes = TRUE)
After installation, see the help page:
#> Implementation of BDAT Tree Taper Fortran Functions in R
#>
#> Description:
#>
#> Implementing the BDAT tree taper Fortran routines to be available
#> in R to calculate diameters, volume, assortments, double bark
#> thickness and biomass for different tree species based on tree
#> characteristics and sorting information.
or read the vignette