To cite package ‘fgdr’ in publications use:

  Uryu S (2024). _fgdr: Utilities for Fundamental Geo-Spatial Data_. R
  package version 1.1.1.9000, <https://github.com/uribo/fgdr>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {fgdr: Utilities for Fundamental Geo-Spatial Data},
    author = {Shinya Uryu},
    year = {2024},
    note = {R package version 1.1.1.9000},
    url = {https://github.com/uribo/fgdr},
  }