Product ID: C1-T00-TGRR-05-REL
Subject Content: The CD-ROMs (2-disc set) containing Census 2000 block relationship files are a tool to help users compare the universe of 1990 census blocks to the universe of Census 2000 blocks. From these files you can determine how 1990 blocks relate to Census 2000 blocks and vice versa. The data contained in the relationship files are extracted from the Census Bureau's internal TIGER database. The Census 2000 block relationship files portray the following relationships between the 1990 and the Census 2000 blocks:
The CD version has data organized into state files while the online version offers the files by county.
Most people will need only the 1990 tabulation census block to Census 2000 tabulation block relationship file to see how 1990 tabulation blocks now correspond to Census 2000 blocks.
Geography: Files were created for the 50 states, the District of Columbia, Puerto Rico and the following Island Areas: American Samoa, Guam, Northern Mariana Islands, and the U.S. Virgin Islands.
Census Contact: Customer Services Center (orders), 301-763-INFO (4636); Geographic Products Management Branch: 301-763-1128.