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  2. Topologically Integrated Geographic Encoding and Referencing

    en.wikipedia.org/wiki/Topologically_Integrated...

    TIGER includes both land features such as roads, rivers, and lakes, as well as areas such as counties, census tracts, and census blocks. Some of the geographic areas represented in TIGER are political areas, including state and federally recognized tribal lands, cities, counties, congressional districts, and school districts.

  3. National Historical Geographic Information System - Wikipedia

    en.wikipedia.org/wiki/National_Historical...

    The National Historical Geographic Information System (NHGIS) is a historical GIS project to create and freely disseminate a database incorporating all available aggregate census information for the United States between 1790 and 2010. The project has created one of the largest collections in the world of statistical census information, much of ...

  4. Census tract - Wikipedia

    en.wikipedia.org/wiki/Census_tract

    A census tract, census area, census district or meshblock [1] is a geographic region defined for the purpose of taking a census. [2] Sometimes these coincide with the limits of cities , towns or other administrative areas [ 2 ] and several tracts commonly exist within a county.

  5. United States census - Wikipedia

    en.wikipedia.org/wiki/United_States_census

    The United States census (plural censuses or census) is a census that is legally mandated by the Constitution of the United States. It takes place every ten years. It takes place every ten years. The first census after the American Revolution was taken in 1790 under Secretary of State Thomas Jefferson .

  6. This map shows health disparities for WA census tracts ... - AOL

    www.aol.com/news/map-shows-health-disparities-wa...

    Instead, the state uses the Environmental Health Disparities Map, which helps state departments evaluate health risks in Washington’s 1,458 census tracts. The map was first launched in 2019 and ...

  7. Census county division - Wikipedia

    en.wikipedia.org/wiki/Census_county_division

    Census 2000 Block Map of DeKalb County, Georgia, showing the county's five CCDs (delineated by the dark lines). CCDs are non-governmental units and have no legal or governmental functions. Their boundaries usually follow visible features, such as roads, railroads, streams, power transmission lines, or mountain ridges, and coincide with the ...

  8. Minor civil division - Wikipedia

    en.wikipedia.org/wiki/Minor_civil_division

    A minor civil division (MCD) is a term used by the United States Census Bureau for primary governmental and/or administrative divisions of a county or county-equivalent, typically a municipal government such as a city, town, or civil township. MCDs are used for statistical purposes by the Census Bureau, and do not necessarily represent the ...

  9. Public Use Microdata Area - Wikipedia

    en.wikipedia.org/wiki/Public_Use_Microdata_Area

    As of 2022, based on the results of the 2020 Census, there are 2,487 PUMAs. PUMAs allow the Census to publish census data for sub-state areas throughout every state. For example, the ACS publishes detailed data every year, but due to their sampling procedure only publishes data for census area that have more than 65,000 People.