This article is from the Geographic Information Systems FAQ, by Lisa Nyman lnyman@census.gov with numerous contributions by others.
For information on TIGER/Line products and releases,
call the US Census Bureau at 301-457-4100
Call particular vendors for TIGER to vendor-format conversion problems.
Also, get TIGER information on the WWW at:
http://www.census.gov/geo/www/tiger/
And while we're on the subject of Census Data....
From: Henk Meij <hmeij@ciesin.org>
A data archive was created and is maintained by the National
Aeronautics and Space Administration (NASA), under GSFC Letter
Contract NAS5-32632, by the Socioeconomic Data and Applications
Center (SEDAC) of the Consortium for International Earth Science
Information Network (CIESIN) in cooperation with the Urban Information
Center (UIC) at the University of Missouri St. Louis.
The archive contains boundary files based on 1992 TIGER/Line, standard
extract files based on 1990 STF3A, Block statistics from STF1B,
and enhanced migration files based
on STP28, county to county. This is alla vailable at:
ftp ftp.ciesin.org
<login in as "ftp" or "anonymous">
<send email address as password>
cd /pub/census
o helpful readme files will be displayed to the screen
o documentation, albeit still sparse, online
o all files in (binary) zipped archive-file format
(use ftp mode BINARY for retrieval)
o unzip binaries for many platforms provided as well as
unzip/zip source code
 
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