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ISLSCP II Global Population of the World

Data Set Overview

Data setISLSCP II Global Population of the World
DOI10.3334/ORNLDAAC/975
Release date2010-04-19
ProjectISLSCP Initiative II (ISLSCP II)
Time Period1990-01-01 to 1995-12-31

Description

Global Population of the World (GPW) translates census population data to a latitude-longitude grid so that population data may be used in cross-disciplinary studies. There are three data files with this data set for the reference years 1990 and 1995. Over 127,000 administrative units and population counts were collected and integrated from various sources to create the gridded data. In brief, GPW was created using the following steps: * Population data were estimated for the product reference years, 1990 and 1995, either by the data source or by interpolating or extrapolating the given estimates for other years. * Additional population estimates were created by adjusting the source population data to match UN national population estimates for the reference years. * Borders and coastlines of the spatial data were matched to the Digital Chart of the World where appropriate and lakes from the Digital Chart of the World were added. * The resulting data were then transformed into grids of UN-adjusted and unadjusted population counts for the reference years. * Grids containing the area of administrative boundary data in each cell (net of lakes) were created and used with the count grids to produce population densities. As with any global data set based on multiple data sources, the spatial and attribute precision of GPW is variable. The level of detail and accuracy, both in time and space, vary among the countries for which data were obtained.

Documentation

Data set reference document

Citation

Balk, D., U. Deichmann, and G. Yetman. 2010. ISLSCP II Global Population of the World. In Hall, Forrest G., G. Collatz, B. Meeson, S. Los, E. Brown de Colstoun, and D. Landis (eds.). ISLSCP Initiative II Collection. Data set. Available on-line [http://daac.ornl.gov/] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A. doi:10.3334/ORNLDAAC/975
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Project

ISLSCP Initiative II (ISLSCP II): The International Satellite Land-Surface Climatology Project

Project data set list for ISLSCP Initiative II (ISLSCP II).

Companion Files

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  • 0_global_population_readme.txt
  • 1_global_population_doc.pdf

Data Files

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Data File (Granule)File SizeDates
gpw_population_counts_xdeg.zip 2.9 MB 1990-01-01 - 1995-12-31
gpw_land_area_xdeg.zip 364.8 KB 1990-01-01 - 1995-12-31
gpw_population_density_xdeg.zip 1.2 MB 1990-01-01 - 1995-12-31

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Files related to this data set have been downloaded on 2715 occasions since 2010-04-21, totaling 16629 files.