@misc{indiciaec1a88a886088,
  title = {National Land Cover Database 2001 (NLCD01) Imperviousness Layer Tile 1, Northwest United States: IMPV01\_1},
  author = {Andrew E. LaMotte and Michael Wieczorek},
  year = {2010},
  doi = {10.3133/ds587a},
  url = {https://pubs.usgs.gov/publication/ds587A},
  note = {Source identifier: ds587A}
}