A wide range of urban ecosystem studies, including urban hydrology, urban climate, land use planning and resource management require current and accurate geospatial data of urban impervious surfaces. NLCD imperviousness products represent urban impervious surfaces as a continuous variable and were mapped using a regression tree model.
For additional information regarding creation of NLCD percent developed imperviousness products:
Xian, G., Homer, C., Dewitz, J., Fry, J., Hossain, N., and Wickham, J., 2011. The change of impervious surface area between 2001 and 2006 in the conterminous United States. Photogrammetric Engineering and Remote Sensing, Vol. 77(8): 758-762.
Yang, L., Huang, C., Homer, C., Wylie, B., and M. Coan. 2003. An approach for mapping large-area impervious surfaces: Synergistic use of Landsat 7 ETM+ and high spatial resolution imagery.Canadian Journal of Remote Sensing, Vol. 29, No. 2, pp.230-240.