TY - RPRT TI - National Land Cover Database 2001 (NLCD01) Imperviousness Layer Tile 1, Northwest United States: IMPV01_1 AU - Andrew E. LaMotte AU - Michael Wieczorek PY - 2010 DO - 10.3133/ds587a UR - https://pubs.usgs.gov/publication/ds587A ID - ds587A ER -