To cite package ‘tilemath’ in publications use:

  Sumner M (2026). _tilemath: Tile Math for Map Tile Pyramids_. R
  package version 0.0.0.9000, <https://github.com/hypertidy/tilemath>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {tilemath: Tile Math for Map Tile Pyramids},
    author = {Michael Sumner},
    year = {2026},
    note = {R package version 0.0.0.9000},
    url = {https://github.com/hypertidy/tilemath},
  }