TO: CTPP-News listserv FR: Chuck Purvis, MTC RE: PUMA Delineation Program The following are a series of talking points (from a Census Bureau staff person?) from the March 2001 meeting of the State Data Center network. They describe the upcoming program to delineate the 1 percent and 5 percent Public Use Microdata Areas (PUMAs). Since this is an open process, I would encourage staff of Metropolitan Planning Organizations to work with their State Data Centers on this program. In many cases, the MPOs are either "affiliate data centers" or "regional data centers" and are already part of the network; but there other MPOs who are new to this census game and should be more involved. I think one of the challenges in our region will be to open the process to academic PUMS researchers who cherish this dataset as much as we do. I guess my recommendation to the academic researchers is to contact your local MPO or Council of Government to see who's doing what in PUMA definition. Chuck Purvis, MTC *********************************************************************************** 2000 PUMA Delineation Program WHAT Delineation of 5-percent and 1-percent Public Use Microdata Areas WHERE SDC does the delineation themselves SDC coordinates local delineation Must be an OPEN PROCESS WHEN 90-day period for the initial delineation (June-August 2001) 30-day period for the verification phase (November-December 2001) 5-Percent PUMA Criteria RULES Delineate PUMAs for entire state Counties with <100,000 cannot be split Boundaries follow counties and census tracts or incorporated places >100,000 PUMAs must be contiguous RECOMMENDATIONS MA/non-MA segregation Cities >100,000 Comparability with 1990 1% PUMAs 100,000-200,000 in size 1-Percent PUMA Criteria Aggregations of the 5-percent PUMAs Same rules and recommendations as the 5-percent PUMAs 400,000-800,000 in size Census Bureau Provided Material Invitation Letter and PUMA Guidelines Mid April Census 2000 TIGER/Line Files (90 PUMAs) May-June Census Tract Outline Maps-Ctys. >100,000 May 1990 1-Percent PUMA Equivalency File May 2000 PUMA Geographic Equivalency File May PUMA Verification Outline Maps October-November PUMA Verification Equivalency File October-November *********************************************** Charles L. Purvis, AICP Senior Transportation Planner/Analyst Metropolitan Transportation Commission 101 Eighth Street Oakland, CA 94607-4700 (510) 464-7731 (office) (510) 464-7848 (fax) www: http://www.mtc.ca.gov/ ***********************************************