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

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

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

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

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

To provide gridded demographic data, including characteristics of income, education, 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.

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 income, education, and housing, for the United States for data integration.

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 income, education, 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 income, education, and housing, for the United States and Puerto Rico for data integration.

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 estimates of urban and rural populations and land areas in the low elevation coastal zone.

To provide a time series of raster data on population projected to the year 2015 to facilitate data integration.