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Component ID: #ti1681305477

The U.S. Census Bureau has supplied global subnational data for five decades. The essential role of population data in humanitarian relief and disaster planning was described in a 2007 National Research Council report. Our most recent efforts have sought to fulfill the needs described in this report.

Our products provide data on global population patterns according to both administrative areas and grid cells. Data inputs include census data from every country and territory that conducts a census, administrative boundary maps from national and international mapping agencies, and high- and medium-resolution satellite imagery. Population data can be projected forward to the present and linked to administrative boundary maps to allow mapping of population density and other variables.

Administrative areas (ADMs) include the equivalents of U.S. states, counties, and townships in each country and territory in the world. We gather administrative boundary maps from national sources, online repositories, and federal and international agencies, then assess their quality and how well they link with the ADMs that appear in each country's or territory’s census. While ADMs in the U.S. largely remain constant from year to year, internal boundaries are frequently redrawn in some other countries.

National census data are produced by the world’s 200+ national statistical agencies. We constantly update our data archive with the latest census results worldwide, using data from statistical agencies’ websites and the public International Collection of the U.S. Census Bureau Library. Census data can be projected forward to the current date, and linked to subnational maps.

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