Hi Bob –  You are correct.

For the Census Bureau’s STANDARD ACS tabulations, only Census geography is used, like tracts and block groups.  (note that the Census Bureau is NOT planning to release block group tabulations in American FactFinder.  When a table is created for Block Group geography, it will only be available in summary file format in a data download area.

For the CTPP which is a CUSTOM tabulation using ACS microdata records,  TAZs will be a tabulation geography.

Elaine

From: ctpp-news-bounces@chrispy.net [mailto:ctpp-news-bounces@chrispy.net] On Behalf Of Paddock, Bob
Sent: Monday, November 08, 2010 9:28 AM
To: 'ctpp-news@chrispy.net'
Subject: [CTPP] Census Geography and the ACS

If I understand it correctly, the TAZ system being created by MPOs for submittal to the Census Bureau will be used to obtain the ‘CTPP-like’ product being paid for through AASHTO.  As far as the ACS tabulations are concerned, we will still only have existing Census geography, e.g. county, MCD, tract.  TAZs will NOT be part of that geography.

My question is, “Am I correct in this assumption?”