Granato, Sam wrote:
I have a question for the CTPP group. About this time
10 years ago the
Census requested of MPO's an up-to-date list of employer addresses for
use in the journey-to-work coding. If you're like us, you've made lots
improvements locally in the geocoding of these
addresses. But I have
heard a word from the Census on supplying them with
this list for the
Sam, in the next issue of our newsletter called "ctpp 2000 status report",
Phil Salopek addesses this issue. A draft of the newsletter was
distributed at TRB two weeks ago and will be posted on our web page very
shortly. It is awaiting some signatures to approve the distribution.
below is a copy of Phil's article from the draft. The real short answer to
your question is Yes, the process will be different. Here is the long
answer. Phil and Bob may wish to add something.
Local Review of Employer Files (LREF)
by Phil Salopek
For the 1980 and 1990 censuses, Metropolitan Planning Organizations (MPOs)
were asked to provide the names and addresses of major employers in their
area to Census for use in place of work coding. These lists were useful
additions to the reference materials Census employed in the coding, but
there are some aspects of the process we think we can improve for the 2000
In the first place, the creation of the lists was very labor intensive and
time consuming for many MPOs, and often required extensive administrative
dealings with other agencies. The collection and processing of the lists
was very labor intensive and time consuming for the Census Bureau too, as
the files were received on various media and in many different formats.
The Bureau had to obtain and process a number of other large reference
files as well. The result was a complex, difficult to manage process.
For 2000, one of our first goals was to cut down on the total number of
inputs to the process. We also felt it would be less difficult for the
majority of MPOs to review a list that already existed, rather than create
a list themselves as in the past. Toward this end, the Bureau has
licensed a commercial business database for use in the 2000 census that
covers the entire nation. The file is based on yellow pages, commercial
white pages, and government blue pages phone directories. Unlike the
Bureaus internal establishment list, which is census-confidential and not
available to the public, the vendor who owns
the leased file has agreed to an MPO review prior to Census using the file
for place-of-work coding.
Another important issue for Census was the need to standardize the files
coming in from the MPOs. We faced a similar issue in the 1990 census in
regard to traffic analysis zone (TAZ) equivalency files. The problem was
effectively addressed by Census distributing a personal-computer-based
application program to the MPOs for the equivalency work that also created
a standard output file for transmittal back to Census. It seemed
reasonable to consider a comparable process for the 2000 employer files.
Our plan is to develop a GIS-based program, similar to the TAZ update
program, for MPOs to review, correct, update, and extend the employer
names and addresses in the commercial business database Census has leased.
Our intent is to create an application that will display on a TIGER/Line98
base the locations of employers successfully geocoded by Census. The
application will allow the user to choose various ways to organize the
review process: by number of employees, industry type, street name, ZIP
code, etc. MPOs will be able to correct the information for businesses
coded to the wrong location. They will also be able to add employers
missing from the original file and delete firms no longer in business.
Records for companies that Census was not able to geocode will be provided
as well, and MPOs will have the capability to indicate their locations.
The application will create a standard output file for transmittal back to
As noted above, we envision the Local Review of Employer Files (LREF)
occurring after the TAZ update program. However, if some MPOs see an
advantage to overlapping the two processes, that may be possible. We
think six months should be sufficient for an MPO to complete the review,
and hope to be able to begin distribution of the application during May or
June of 1999. Place-of-work coding is currently scheduled to begin in
June of 2000 and some processing of the files will be required prior to
this, so all employer files need to be returned to Census by January 2000
at the latest.
The details of the LREF program will be worked out in the next month or