TY - RPRT TI - Generating Ground Reference Data for a Global Impervious Surface Survey AU - Tilton, James C. AU - deColstoun, Eric Brown AU - Wolfe, Robert E. AU - Tan, Bin AU - Huang, Chengquan PY - 2012 UR - https://ntrs.nasa.gov/citations/20120009268 ID - 20120009268 ER -