Posts Tagged ‘american factfinder’

American Factfinder Tutorial & Census Geography Updates

Monday, July 23rd, 2012

I’ve been en-meshed in the census lately as I’ve been writing a paper about the American Community Survey. Here are a few a things to share:

  • Since I frequently receive questions about how to use the American Factfinder, I’ve created a brief tutorial with screenshots demonstrating a few ways to navigate it. I illustrate how to download a profile for a single census tract from the American Community Survey, and how to download a table for all ZIP Code Tabulation Areas (ZCTAs) in a county using the 2010 Census.
  • New boundaries for PUMAs based on 2010 census geography have been released; they’re not available from the TIGER web-based interface yet but you get can state-based files from the FTP site. I’ve downloaded the boundaries for New York and there are small changes here and there from the 2000 Census boundaries; not surprising as PUMAs are built from tracts and tract boundaries have changed. One big bonus is that PUMAs now have names associated with them, based on local government suggestions. In NY State they either take the name of counties with some directional element (east, central, south, etc), or the name of MCDs that are contained within them. In NYC they’ve been given the names of community districts.
  • I’ve done some digging through the FAQs at https://askacs.census.gov/ and discovered that the census is going to stick with the old 2000 PUMA boundaries for the next release of the American Community Survey – the 2011 ACS will be released at the end of this year. 2010 PUMAs won’t be used until the 2012 ACS, to be released at the end of 2013.
  • Urban Areas are the other holdovers in the ACS that use 2000 vintage boundaries. The ACS will also transition to the 2010 boundaries for urban areas in the 2012 ACS.
  • In the course of my digging I discovered that the census will begin including ZCTA-level data as part of the 5-year ACS estimates, beginning with the 2011 release this year. 2010 ZCTA boundaries are already available, and 2010 Census data has already been released for ZCTAs. The ACS will use the 2010 vintage ZCTAs for each release until they’re redrawn for 2020.

Some 2010 Census Updates

Monday, February 7th, 2011

Some geography updates to pass along regarding new US Census data:

  • The Census has released a few 2010 map widgets that you can embed in web pages. One shows population change, density, and apportionment for the whole country at the state level, while the other shows population, race, and Hispanic change for states at the county level. As of this post only four states are ready (LA, MS, NJ, and VA) but they’ll be adding the rest once they’re available.
  • The 2010 TIGER Line Files are starting to be released; they’ve changed the download interface a little bit based on user feedback. Most summary levels / geographic areas are available; some (like ZIP Codes and PUMAs) will be released later this year.
  • They’re also rolling out the new interface for the American Factfinder; currently you can get 2000 Census data, some population estimates, and the 2010 Census data as it becomes available. Other datasets like the American Community Survey and Economic Census will be added over time. Some maps and gov docs librarians have expressed concerned about the change – apparently when you download the data from the new interface the FIPS codes are not “ready to go” for joining to shapefiles; there’s one long geo id that has to be parsed. The other concern is that the 1990 Census won’t be carried over into the new interface at all. The original American Factfinder is slated to come down towards the end of this year.


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