understanding census geography
Download
Skip this Video
Download Presentation
Understanding Census Geography

Loading in 2 Seconds...

play fullscreen
1 / 29

Understanding Census Geography - PowerPoint PPT Presentation


  • 221 Views
  • Uploaded on

Understanding Census Geography. Lisa Neidert NPC Workshop : Analyzing Poverty and Socioeconomic Trends Using the American Community Survey June 22 – June 26, 2009. Census Geography. Geographic Areas: with 1-year and 3-year data. Geographic Areas: with 1-year and 3-year data.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Understanding Census Geography' - Roberta


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
understanding census geography

Understanding Census Geography

Lisa Neidert

NPC Workshop: Analyzing Poverty and Socioeconomic Trends Using the American Community Survey

June 22 – June 26, 2009

what s available in the acs for single year data via maps
What’s available in the ACS for single year data: via maps
  • Maps showing counties and places for each state (or the nation)
  • http://www.census.gov/acs/www/Products/users_guide/acs_2007_reference_maps.htm
states where all counties are over 20 000
States where all counties are over 20,000
  • Connecticut
  • Delaware
  • District of Columbia
  • New Hampshire
  • New Jersey
  • Rhode Island
what geographies are available in the 2005 2007 acs
What geographies are available in the 2005-2007 ACS

http://www.census.gov/acs/www/acs-php/2005_2007_beginner_users_guide.php

geographical areas texas covered in 2005 2007
Geographical Areas (Texas):Covered in 2005-2007
  • ACS 2005-2007 Geographical Areas
what s available in the acs via look up tables
What’s available in the ACS: via Look-up tables
  • Geographic entities available for 1-year data (2007)
  • Geographic entities available for 3-year data (2005-2007)
not ready for prime time census tracts and zip codes
Not ready for prime-time: census tracts and zip codes
  • Need 5-year estimates file
    • 2005 – 2009
    • Available 2010
  • Annual updates thereafter
    • 2006 – 2010
    • 2007 – 2011, etc.
  • Test site available
    • – selected counties (34)
    • Selected profiles (demographic, social, economic, housing)http://www.census.gov/acs/www/AdvMeth/Multi_Year_Estimates/overview.html#noteforusers
zip codes
Zip codes
  • Not census geography
    • However, big demand for zip code data
  • Census Bureau builds ZCTAs via census blocks
  • ZCTA FAQs
    • http://www.census.gov/geo/ZCTA/zctafaq.html
  • Fun resource
    • http://en.wikipedia.org/wiki/Zip_code
what are pumas
What are PUMAs?
  • Public Use Microdata areas
  • Combination of population geographies that sum to at least 100,000 population.
  • In rural areas, several counties will form a PUMA. In an urban area, a county will be subdivided into multiple PUMAs.
  • PUMAs do not cross state boundaries
pumas
PUMAs. . . .
  • PUMAs do not have good comparability over time (1990, 2000).
  • PUMA geographies for the ACS are the same as the 2000 boundaries
  • PUMAs are reasonable substitutes for counties
  • Smallest geography available in the microdata.
pumas22
PUMAs
  • Can be valuable for bypassing geographic restrictions when one wants national information at the county level
  • Create pseudo counties based on a cross-walk between PUMAs and counties
pumas via maps
PUMAs via Maps
  • Reasonable tool for rural parts of a state
  • Somewhat unwieldy for urban areas
  • Multiple maps per state

http://usa.ipums.org/usa/volii/2000pumas.shtml

pumas via text
PUMAs via text
  • Describes PUMA composition
  • By:
    • County
    • County subdivision
    • Place
    • Census tract
  • http://usa.ipums.org/usa/volii/2000pumas.shtml
  • http://www.psc.isr.umich.edu/dis/data/ref/PUMA/SUPERPUMA-2000-5pct.html
metropolitan areas
Metropolitan areas
  • Defined by Office Management Budget (OMB)
  • http://www.census.gov/population/www/estimates/metrodef.html
  • Historical Definitions
  • http://www.census.gov/population/www/estimates/pastmetro.html
  • Researcher is free to follow own definitions
  • Census Bureau follows OMB definitions
ad