The alert eyes (and computer processing skills) of one of the many state
Department of Transportation folks processing the UA Census 2000 TIGER/Line
files has discovered that the 1990 Urban/Rural code on Record Type S in the
UA Census 2000 TIGER/Line files is in error. We have determined that this
affects over 1000 counties, and are now preparing a notice for our web site.
We also are discussing how to best resolve this situation. The error
overstates the extent of the 1990 urban classification in the affected
counties -- some polygons are classified as 1990 urban when they should have
been 1990 rural. The 2000 UA/UC codes and Urban/Rural codes are correct, as
is the 1990 UA code.
Until we determine a solution, the correct 1990 Urban/Rural code is located
on the Census 2000 TIGER/Line files on Record Type A. For both versions
(the Census 2000 and the UA Census 2000 TIGER/Line files), the CENID/POLYID
codes are the same, so you can use the CENID/POLYID as a match key across
these two versions.
Once we have a solution determined, we will let you know.
U. S. Census Bureau
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