To cite package ‘planisphere’ in publications use:

Lambert N (2026). planisphere: Map Projections. R package version 0.1.0, https://CRAN.R-project.org/package=planisphere.

Corresponding BibTeX entry:

  @Manual{,
    title = {planisphere: Map Projections},
    author = {Nicolas Lambert},
    year = {2026},
    note = {R package version 0.1.0},
    url = {https://CRAN.R-project.org/package=planisphere},
  }