Nationwide dataset of block-level data
extracted from the statistically adjusted
2000 census PL94-171 file released by
the Census Bureau under court order in
December 2002.
Census Bureau Disclaimer
Accuracy and Coverage Evaluation Revision II
(April 4, 2003)
Download
state-by-state adjusted block data from
FairData:
Statistically Adjusted PL94 Data
Download
nationwide adjusted block-group data from
FairData:
Statistically Adjusted PL94 Data Nationwide
Block Groups
Interactive
"Zoomable/Clickable" Thematic Map
(works with browser)
NOT COMPATIBLE WITH FIREFOX 1.5 (click for
details)
 Undercount
Mapper
(displays
nationwide undercount data from the 2000
census -- block group, tract, and county
levels)
High Detail "zoomable" Adobe Map
(zoom to 600+)
The complete adjusted dataset and
associated boundary files for all geographic
layers (in Maptitude binary format) can be
purchased from
Caliper.
UCLA site for raw data
Associated Press, December 07, 2002
"Census State List" Table
(excludes Puerto Rico)
Notes:
Population field names generally follow
Maptitude nomenclature.
The files are in a comma-delimited
format. Field names are in the first
row. The field labeled "Code" can be
joined to a similar field created when
building block-level TIGER files using
Maptitude or other geographic
information system software
packages. PL94 -171 fields showing
detail for 3+ races are
excluded. A separate (and with the
adjusted dataset, hypothetical)
calculation based on the Office of
Management and Budget/DOJ
minority definition for election plans
and civil rights enforcement is
included (field names containing "DOJ")
:
The Department of Justice allocates
any multiple-race census response that
included white and one of the five other
race categories to the minority race
listed in the response. The DOJ minority
population figures include persons who
identified themselves as (1) a
single-race minority, (2) white plus one
other race, (3) multiple-race (where
more than one minority race is listed),
or (4) Hispanic. This definition is in
accordance with Department of Justice
policy pursuant to Part II of OMB
Bulletin 00-02. (Source: [Federal
Register: January 18, 2001 (Volume 66,
Number 12)] [Notices] [Page 5411-5414]
From the Federal Register Online via GPO
Access [wais.access.gpo.gov]
[DOCID:fr18ja01-171]
A few geography fields were deleted, but
the remaining geography field names were
left unchanged. Many of the more obscure
geography fields are either left blank or
filed with 9's by the Census Bureau.
So while this is not the complete adjusted
PL94 block-level dataset, it should be
enough for most purposes. Population
totals for higher levels of geography can
be calculated using GIS or database
software from these block-level files.
These
files are provided on an "as is" basis.
There is no guarantee that the data files
are error-free. The files were produced
using the same query and extraction module
in MS Access2002 used to
produce FairData's
unadjusted PL94-171 dataset.
Since March 2001, FairData's
unadjusted PL94-171 files have been used
in at least 35 states with no reported
errors.
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