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 provide a raster representation of urban areas (or urban mask) for use with GRUMP population grids or 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 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 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 gridded demographic data, including characteristics of age, race, ethnicity, and housing, for the United States and Puerto Rico for data integration.

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

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

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 projected to the year 2015 to facilitate data integration.

To provide a gridded data on country-level population and downscaled projections based on the SRES B2 marker scenario.

To provide raster based GIS coverage of Mexican population for data integration.