@misc{indiciaea7617b33063c,
  title = {Standards for digital elevation models},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1986},
  doi = {10.3133/ofr864},
  url = {https://pubs.usgs.gov/publication/ofr864},
  note = {Source identifier: ofr864}
}