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ISLSCP_II_GPOP ISLSCP II Global Population of the World BALK, D.; DEICHMANN, U.; YETMAN, G. ISLSCP II Global Population of the World 2010 Oak Ridge, Tennessee, U.S.A. Oak Ridge National Laboratory Distributed Active Archive Center Online Files doi:10.3334/ORNLDAAC/975 975

ABSTRACT: 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.

1990-01-01 1995-12-31 COMPLETE -90 90 -180 180 ESIP Earth Science Information Partners Program EOSDIS Earth Observing System Data Information System TECHNICAL CONTACT ORNL DAAC User Services ORNL DAAC USER SERVICES OFFICE OAK RIDGE NATIONAL LABORATORY OAK RIDGE, TENNESSEE 37831 USA DIF AUTHOR ORNL DAAC User Services ornldaac@ornl.gov (865) 241-3952 (865) 574-4665

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Oak Ridge Tennessee 37831-6407 USA EARTH SCIENCE HUMAN DIMENSIONS POPULATION POPULATION DISTRIBUTION EARTH SCIENCE HUMAN DIMENSIONS POPULATION POPULATION SIZE EARTH SCIENCE LAND SURFACE LAND USE/LAND COVER LAND USE/LAND COVER CLASSIFICATION MODIS TERRA EARTH SCIENCE GCM ISCCP GEWEX ISLSCP GRID DATA LAND COVER DEMOGRAPHICS MODEL OUTPUT SOCIOECONOMICS GLOBAL POPULATION POPULATION DENSITY POPULATION ESTIMATES DIGITAL CHART OF THE WORLD GLOBAL ENERGY AND WATER CYCLE EXPERIMENT INTERNATIONAL SATELLITE LAND-SURFACE CLIMATOLOGY PROJECT GET DATA http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=975 VIEW RELATED INFORMATION https://daac.ornl.gov//ISLSCP_II/guides/global_population_xdeg.html ISLSCP II Global Population of the World USA/NASA ENGLISH GCMD CEOS IDN DIF VERSION 9.0