Understanding census geography
Download
1 / 29

Understanding Census Geography - PowerPoint PPT Presentation


  • 213 Views
  • Updated 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 l.jpg

Understanding Census Geography

Lisa Neidert

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

June 22 – June 26, 2009



Geographic areas with 1 year and 3 year data l.jpg
Geographic Areas:with 1-year and 3-year data


Geographic areas with 1 year and 3 year data4 l.jpg
Geographic Areas:with 1-year and 3-year data


What s available in the acs for single year data via maps l.jpg
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 l.jpg
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 l.jpg
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 l.jpg
Geographical Areas (Texas):Covered in 2005-2007

  • ACS 2005-2007 Geographical Areas


What s available in the acs via look up tables l.jpg
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 l.jpg
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


Example census tracts for community districts l.jpg
ExampleCensus Tracts for community districts


Community district 11 manhattan east harlem l.jpg
Community District 11:Manhattan, East Harlem


Zip codes l.jpg
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 l.jpg
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 l.jpg
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 l.jpg
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





Illinois example puma to county example l.jpg
Illinois example:PUMA to county example


Pumas via maps l.jpg
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 l.jpg
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 l.jpg
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