The United States Geological Survey provides guidelines for citing USGS data products (as downloaded from 'get_tiles') at: https://www.usgs.gov/faqs/how-should-i-cite-datasets-and-services-national-map To cite terrainr in publications please use: Mahoney M. J., Beier C. M., and Ackerman, A. C. (2022). terrainr: An R package for creating immersive virtual environments. Journal of Open Source Software, 7(69), 4060, https://doi.org/10.21105/joss.04060 A BibTeX entry for LaTeX users is @Article{, year = {2022}, publisher = {The Open Journal}, volume = {7}, number = {69}, pages = {4060}, author = {Michael J. Mahoney and Colin M. Beier and Aidan C. Ackerman}, title = {{terrainr}: An R package for creating immersive virtual environments}, journal = {Journal of Open Source Software}, doi = {10.21105/joss.04060}, url = {https://doi.org/10.21105/joss.04060}, }