Global Rural-Urban Mapping Project (GRUMP), v1

http://sedac.ciesin.columbia.edu/data/collection/grump-v1 

“The Global Rural-Urban Mapping Project, Veresion 1 (GRUMPv1) data collection is a valuable resource both for researchers studying human-environmental interactions and for applied users working to address criticial environmental and societal issues.  GRUMPv1 consists of eight global data sets:  population count grids, population density grids, urban settlement points, urban-extents grids, land/geographic unit area grids, national boundaries, national identifier grids, and coastlines.?