@misc{indiciae816a9e7f5373,
  title = {Distance to nearest road in the conterminous United States},
  author = {Raymond D. Watts},
  year = {2005},
  doi = {10.3133/fs20053011},
  url = {https://pubs.usgs.gov/publication/fs20053011},
  note = {Source identifier: fs20053011}
}