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What is the difference between the Census 2000 and current shapefiles?

April 26, 2017census shapefiles

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What is the difference between the Census 2000 and current shapefiles?

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The TIGER/Line Shapefiles contain Census 2000 vintage geography and current geography. Census 2000 geography is defined as the geographic extent of legally defined geographic areas (boundaries of governmental units) or statistical areas in effect on January 1, 2000. The Census Bureau has not systematically updated the inventory or boundaries of statistical areas since 2000, however, changes to legal areas may affect statistical areas. Current geography is defined as the latest version of the geographic extent of legally defined geographic areas as reported, reflecting the boundaries of governmental units in effect as of January 1 of the year in the title of the shapefiles or legal and statistical area boundaries that have been adjusted and/or corrected since Census 2000.