To permit cartographic display of coastlines that exactly match the GRUMPv1 population surfaces.

To provide land area data for use with GRUMPv1 population and urban data as well as a quantitative measure of resolution of the input spatial units for GRUMPv1.

To permit the summation of population values by country/territory and, in combination with other data layers, the summation of population values by irregular areas represented in the other data layers and country/territory.

To permit cartographic display of countries and territories that exactly match the GRUMPv1 population surfaces

To provide a time series of raster population density data for data integration.

To provide a time series of raster population data for ntegration with other data sets.

To provide populated place (point) data with consistent population estimates.

To provide a raster representation of urban areas (or urban mask) for use with GRUMP population grids or other data sets.

To preserve access to the original population data used by the Millennium Ecosystem Assessment (MA) and other related research.

To preserve access to the original set of socioeconomic and natural resource scenarios used by the Millennium Ecosystem Assessment (MA) and other related research.

To provide a global data set of point locations and attributes describing nuclear power plants and reactors.

To provide estimates of total, urban and rural populations and land areas in proximity to nuclear power plants.

To provide a time series of raster data on population to facilitate data integration.

To provide a time series of raster data on population density to facilitate data integration.

To provide estimates of net-migration (in-migration minus out-migration) per one-kilometer grid cell on a decadal basis for the 1970s, 1980s, and 1990s.

To provide spatially explicit, historic, city-level population data from 3700 BC to AD 2000 for improved understanding of contemporary and historical urbanization trends.

To provide gridded demographic data, including characteristics of age, race, ethnicity, and housing, for metropolitan statistical areas at a finer resolution than is available in the 30 arc-second grids used for the United States as a whole.

To provide gridded demographic data, including characteristics of age, race, ethnicity, and housing, for the United States.

To provide gridded demographic data, including characteristics of age, race, ethnicity, and housing, for metropolitan statistical areas at a finer resolution than is available in the 30 arc-second grids used for the United States as a whole.

To provide gridded demographic data, including characteristics of age, race, ethnicity, and housing, for the United States and Puerto Rico for data integration.