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US Census Bureau US basemaps and US demographic data: U.S. Gazetteer, TIGER/Line shapefiles, census data. National Historical Geographic Information System: NHGIS provides free of charge, aggregate census data and GIS-compatible boundary files for the United States between 1790 and 2012. Atlas of Historical County Boundaries Project (AHCBP)
This mismatch was not possible when the census TIGER files were available in ASCII format that was topological unlike shapefiles. The Census Bureau has made the data available through WMS servers. [4] The data forms a base for OpenStreetMap in the US, and also was used for the initial import of US map data into the Waze navigation system.
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 ...
ZIP Code Tabulation Areas (ZCTAs) are statistical entities developed by the United States Census Bureau for tabulating summary statistics. These were introduced with the Census 2000 and continued with the 2010 Census and 5 year American Community Survey [1] datasets. They were updated again for the 2020 census.
A Public Use Microdata Area (PUMA) is a geographic unit used by the US Census for providing statistical and demographic information. Each PUMA contains at least 100,000 people. PUMAs do not overlap, and are contained within a single state. PUMAs were first created for the 1990 Census. [1]
With three weeks left in the 2024 NFL regular season, it seems likely that at least a few records will be broken. Keep an eye on these marks.
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.
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