To cite elevatr:
Hollister J, Shah T, Robitaille A, Beck M, Johnson M (2021). elevatr: Access Elevation Data from Various APIs. doi: 10.5281/zenodo.5809645, R package version 0.4.2, https://github.com/jhollist/elevatr/.
Corresponding BibTeX entry:
@Manual{, author = {Jeffrey Hollister and Tarak Shah and Alec L. Robitaille and Marcus W. Beck and Mike Johnson}, title = {elevatr: Access Elevation Data from Various APIs}, year = {2021}, note = {R package version 0.4.2}, doi = {10.5281/zenodo.5809645}, url = {https://github.com/jhollist/elevatr/}, }