To cite package ‘geopt’ in publications use:

Matos C (2026). geopt: Tools to Access and Map Spatial Datasets of Portugal. R package version 0.1.0, https://github.com/c-matos/geopt.

Corresponding BibTeX entry:

  @Manual{,
    title = {geopt: Tools to Access and Map Spatial Datasets of
      Portugal},
    author = {Carlos Matos},
    year = {2026},
    note = {R package version 0.1.0},
    url = {https://github.com/c-matos/geopt},
  }