National Land Cover Database 2001 - Imperviousness of Idaho (source NLCD 2001)
The downloadable ZIP file contains a georeferenced TIF.   The National Land Cover Database 2001 imperviousness layer was produced through a cooperative project conducted by the Multi-Resolution Land Characteristics (MRLC) Consortium. The MRLC Consortium is a partnership of federal agencies (www.mrlc.gov), consisting …