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Data > Data Specials > About Data


Your Price: $39.95

All Available US Census Bureau 2002 TIGER/Line Files

Size: 3.7GB (Compressed)
Format: Native TIGER format

The TIGER/Line files were created from the Census Bureau's TIGER (Topologically Integrated Geographic Encoding and Referencing) database of selected geographic and cartographic information. TIGER was developed at the Census Bureau to support the mapping and related geographic activities required by the decennial and economic censuses and sample survey programs. TIGER/Line files are made available to the public and are typically used by people to provide the digital map base for their Geographic Information System or mapping software.

The 2002 TIGER/Line files include files for all counties and statistically equivalent entities in the United States as well as files for Puerto Rico and the Island Areas. The 2002 TIGER/Line files are released by county or statistically equivalent entity based on the current boundaries in effect as of January 1, 2002 as reported to the Census Bureau by April 1, 2002. Since Census 2000 there have been changes in the universe of counties or statistically equivalent entities. In Colorado, Broomfield County was created from parts of Adams, Boulder, Jefferson, and Weld Counties. This change has resulted in the creation of a separate TIGER/Line file for Broomfield County, Colorado. In Virginia, the independent city of Clifton Forge changed its status to become Clifton Forge town and is now part of Alleghany County, Virginia; it appears in the Alleghany County, Virginia TIGER/Line file. Beginning with the 2002 TIGER/Line files, the Census Bureau no longer will produce a TIGER/Line file for the Midway Islands.

The 108th Congressional Districts do not appear in the 2002 TIGER/Line files. The Census Bureau still was in the process of collecting this information from the states at the time of the creation of the 2002 TIGER/Line files.

The 2002 TIGER/Line files contain few, if any, updates to street features or address ranges from the Census 2000 versions of the TIGER/Line files. Some additional features may have been added in the 20 counties where the Census Bureau improved the street feature coordinates. In a few instances some new features may appear, and address ranges could have been added or updated, to resolve challenges as part of the Census 2000 Count Question Resolution (CQR) Program. As part of a research project to upgrade the positional accuracy of TIGER data, the Census Bureau improved the street feature coordinates in the following counties: Kent, New Castle, and Sussex Counties in Delaware; Seminole County in Florida; Cecil, Somerset and Talbot Counties in Maryland; Baltimore City in Maryland; Auglaize, Crawford, Defiance, Delaware, Fulton, Henry, Miami, Putnam, Richland, Van Wert, and Williams Counties in Ohio; and Hughes County in South Dakota.

The Census Bureau has made major changes to the structure, field definitions, and contents for the 2002 TIGER/Line files. New record types have been added, two record types were deleted, and several record types were expanded and substantially revised. The Census Bureau has removed the 1990 geography from the 2002 TIGER/Line files replacing it with current geography. Also new for the 2002 TIGER/Line files is a permanent zero-cell (or node) identification number (TZID) for each node.

To improve the ability of data users to merge multiple counties, the Census Bureau is adding the state and county codes to those Record Type 1 records for the adjacent county (these are the Record Type 1 records that have the single-sided segment flag set, and until this version, all the data elements for the side of the record "outside" the county have been blank). The Census Bureau also is making the TLIDs and TZIDs for these records the same. Thus the county boundary segments and zero-cells in adjacent counties will now have the same TLID and TZID.


Each state subdirectory is named using the two-digit FIPS code and the Post Office abbreviation for the state (ex. 02_AK for Alaska). Within the state subdirectory each county file has the name TGRssccc.ZIP, where the "ss" is the state FIPS code and "ccc" is the county FIPS code.

The data for each county (or statistically equivalent entity) is stored in a single compressed file that, when decompressed, results in up to 19 separate files representing each of the TIGER/Line record types that exist for that county. Some counties did not require all of the 19 record types and therefore will have less than 19 files. If the types of data contained in record types 4, 6, 7, 8, B and Z are not appropriate for a given county then the files for those record types will NOT be included. New Record Types E and U do not appear in the 2002 TIGER/Line files. The name of each of these files uses a modification of the above convention (TGRssccc.RTx) where "x" is the Record Type. Appendix A of the TIGER/line documentation provides a list of counties and their FIPS codes by state. The data in these files is in a standard ASCII format. The Census Bureau does NOT release the TIGER/Line data or an extract of the internal Census TIGER database in vendor-specific GIS/mapping software formats.

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