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Summary File 3, v1 (1990)

U.S. Census Grids

To provide gridded demographic data, including characteristics of income, education, and housing, for the United States for data integration.

Summary File 3: Metropolitan Statistical Areas, v1 (1990)

U.S. Census Grids

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.

Summary File 1, v1 (1990)

U.S. Census Grids

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

Summary File 1: Metropolitan Statistical Areas, v1 (1990)

U.S. Census Grids

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.

Urban Extents Grid, v1 (1995)

Global Rural-Urban Mapping Project (GRUMP), v1

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

Population Density Grid, v1 (1990, 1995, 2000)

Global Rural-Urban Mapping Project (GRUMP), v1

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

Population Count Grid, v1 (1990, 1995, 2000)

Global Rural-Urban Mapping Project (GRUMP), v1

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

National Identifier Grid, v1 (1995, 2000, 2010)

Global Rural-Urban Mapping Project (GRUMP), v1

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.

Land and Geographic Unit Area Grids, v1 (1990)

Global Rural-Urban Mapping Project (GRUMP), v1

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.

Phosphorus in Manure Production, v1 (1994 – 2001)

Global Fertilizer and Manure, v1

To provide phosphorus in manure production data that can be used in socioeconomic and ecological modeling and to explore anthropogenic activities on ecosystems.

Phosphorus Fertilizer Application, v1 (1994 – 2001)

Global Fertilizer and Manure, v1

To provide phosphorus fertilizer application data that can be used in socioeconomic and ecological modeling and to explore anthropogenic activities on ecosystems.

Nitrogen in Manure Production, v1 (1994 – 2001)

Global Fertilizer and Manure, v1

To provide nitrogen in manure production data that can be used in socioeconomic and ecological modeling and to explore anthropogenic activities on ecosystems.

Nitrogen Fertilizer Application, v1 (1994 – 2001)

Global Fertilizer and Manure, v1

To provide nitrogen fertilizer application data that can be used in socioeconomic and ecological modeling and to explore anthropogenic activities on ecosystems.

Pastures, v1 (2000)

Global Agricultural Lands

To provide data on the extent of pasturelands for research on human-environment interactions.

Croplands, v1 (2000)

Global Agricultural Lands

To provide data on the extent of croplands for research on human-environment interactions.

Annual Chlorophyll-a Concentration, v1 (1998 – 2007)

Indicators of Coastal Water Quality

To provide a gridded version of existing SeaWiFS data in GIS-compatible formats in order to determine concentrations of chlorophyll-a in the coastal water column and to facilitate the integration with other data.

Ancillary Data, v1 (1998 – 2007)

Indicators of Coastal Water Quality

To provide data that can assist in the extraction and analysis of chlorophyll-a concentration and trends from global grids.

Anthropogenic Biomes of the World, v1 (2001 – 2006)

Anthropogenic Biomes

To provide information on global land use for research on human-environment interactions.

Summary File 3, v1 (2000)

U.S. Census Grids

To provide gridded demographic data, including characteristics of income, education, and housing, for the United States and Puerto Rico for data integration.

Summary File 3: Metropolitan Statistical Areas, v1 (2000)

U.S. Census Grids

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.

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