According to the Census Bureau
"By 2004, the American Community Survey ... will produce estimates for
geographic areas and population groups of 65,000 or more, and by 2008, for
even the smallest areas and population groups in the country."
Just what "the smallest areas and populations groups" means is anyone's
guess, but it was my understanding that they're targeting the block-group
level. But as Ed pointed out, this all depends on congress and funding...
Also to address one point that Elizabeth asked in her original question,
"will the C2SS and the ACS provide transportation data at this fine a level
[block group]?" It is my understanding that the C2SS (Census 2000
Supplementary Survey) data will not be available for anything smaller than
counties or cities with more than 250,000 residents. The sample size of the
C2SS was not sufficient to support anything smaller than this. For the ACS,
Principal Planner: GIS and Modeling
North Jersey Transportation Planning Authority, Inc.
One Newark Center, 17th floor
Newark, NJ 07102
From: owner-ctpp-news(a)chrispy.net [mailto:email@example.com]On
Behalf Of ed christopher
Sent: Wednesday, November 07, 2001 4:43 PM
To: Elizabeth Hartmann
Cc: elaine (fta) murakami; ctpp-news maillist
Subject: [CTPP] Re: Geographic coverage, C2SS & ACS
Elizabeth Hartmann wrote:
I work in transportation planning, and we are currently evaluating data
availability regarding the C2SS and the American Community Survey. I
understand that the ACS will provide yearly info on population groups of
65,000 or more, and that for smaller areas, several years' data can be
pooled to maximize reliability.
Within this frame, at how fine a geographic level will this data be
Currently, the decennial census provides data down to the block
group level; will the C2SS and the ACS provide transportation data at this
fine a level?
Liz Hartmann, Ph.D.
Research Analysis Specialist
MNDOT:Office of Investment Management
just to confirm what we spoke about on the phone. i cannot say with any
certainty what the final geography will be with ACS nor even its content. as
i noted, two efforts are underway within OBM. 1) to advise congress on the
content and 2) on methodology (which impacts on geographic levels). how
congress will respond
is anyone's' guess. the mood in congress up to now has been to cut content
and in january i am told the census issues will be moved over to another
subcommittee that will have a chairman that is even more concerned about the
questionnaire being "too" long.
as far as getting ACS at a large scale geography (like the 65K areas) that
should not be an issue. over the years we have been told that multiple
years of ACS data can be pooled to produce small area summaries, but how
small the areas will be and if this comes to pass, is not a done deal. most
of the detail
surrounding the ACS is still up in the air.
in terms of the content, several of us within DOT have made our case to OMB
on the importance and legal needs for the transportation related questions.
i believe that right now OMB is review the information submitted by all the
federal agencies and will reporting out on it sometime in the future--this
is an issue we
i cross posted this to our ctpp-listserve for others who may have similar
questions or who might be able to expound on any of the points raised.
Midwest Resource Center
Federal Highway Administration
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Olympia Fields, Illinois 60461