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Archive of Census Related Products
(ACRP): 1990 Public Use Microdata Sample Areas (PUMA) Boundary
Files
The
1990 Public Use Microdata Sample Areas (PUMA) Boundary Files
portion of the Archive of Census Related Products (ACRP) consists
of 5% sample (apuma) and 1% sample (bpuma) areas for the mapping
of 1990 PUMS data covering the continental United States,
Alaska, and Hawaii. These boundary files are created based
on equivalency files generated by the Geographic Correspondence
Engine (GeoCorr). A national census tract to PUMA geography
correspondence file is used in merging the two files resulting
in the PUMA geographies. An additional file is also available
consisting of geographic centroids for the PUMA coverages
calculated by UIC (Urban Information Center/Office of Computing,
University of Missouri). This portion of the ACRP is produced
by the Columbia University Center for International Earth
Science Information Network (CIESIN).
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