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TIGER
During the 1980 Census, the Census Bureau matched its population statistics to maps, which were drawn and produced by hand. These maps were difficult to maintain because they were often out of date and inaccurate. To solve this problem, the Census Bureau developed the TIGER Line files. TIGER (Topologically Integrated Geographic Encoding and Referencing) is the most comprehensive database of digital mapping information, including roads, highways and census boundaries for the entire United States. TIGER provides the capability of integrating census statistics with relevant geographic areas more efficiently and accurately.