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Census Geographic and
    Data Products

   2010 HCPO/HIGICC Conference
      Data Discovery Session

            Sept 23 - 25, 2009

     Linda Akers Smith and Timothy McMonagle
  Los Angeles Regional Census Center - Geography
                U.S. Census Bureau



                                                   1
Topics

2009 TIGER/line Shapefiles
Future TIGER/line Shapefile release schedule
American Community Survey Data
2010 Decennial Census release schedule




                                               2
2009 TIGER/Line Shapefiles
• Release date October 2009
• Additional Shapefiles available
  – More State-based files
• Changed Topological Faces
  Relationship file to a Shapefile
• Improvement in clean-up of feature
  distortion
• Improved Documentation


                                       3
Future TIGER/line Release
            Schedule
• 2010 TIGER/line shapefiles
  – Contains census 2010 geography
  – State by State in early 2011
  – National in early-mid 2011
• Post 2010 TIGER/line shapefiles
  – 113th Congressional Districts
  – Urban/Rural, Urban Areas, Metropolitan
  – TAZ, ZCTAs,SLDs
Most Frequently Asked Questions
• Where are the streets?:
  – The streets are in the county-based All Lines
    (edges) file. There is a Road Flag attribute which
    indicates if the feature is a road or not
• Where is the demographic data?
  – The TIGER/Line® Shapefiles do not contain
    demographic data but have all of the necessary
    information to join the data to them. American
    FactFinder (http://factfinder.census.gov) is the
    best resource for electronic survey data from the
    Census Bureau
Changes Under Consideration
• In addition to the all lines layer:
  – Roads only shapefile
  – Rail only shapefile
  – Linear hydrography shapefile
• In the metadata:
  – Unique description for each file type
  – Including the file layout inside the metadata
  – providing direct links to the file on the Census Bureau’s
    website
  – Provide link to the technical documentation on the Census
    Bureaus website
Questions about the TIGER/Line®
 shapefiles?


            geo.tiger@census.gov
                301.763.1128

• Free public download from our website (see
  handout):
http://www.census.gov/geo/www/tiger/index.html
Census Demographic Data




                          8
Census Bureau Demographic
           Data

       • Decennial Census
  • American Community Survey
  • Other Surveys and Censuses




                                 9
Census Geography




                   10
11
American Community Survey
• A large, continuous demographic survey goes
  to 3 million addresses every year, covers every
  county in U.S.
• Produces annual and multi-year estimates
  of the characteristics of the population and
  housing
• Produces characteristics, not a population
  count
• Produces information for small areas including
  tracts, block groups and population subgroups

• Full implementation began January 2005
                                                    12
ACS Data Product Release Schedule




Data products are released in the year following the single-year
or multi-year period in which data are collected.


                                                                   13
Current ACS Data Release

• 2008 ACS data released Sept 22, one year
  estimates, for the first time includes estimates on
  health insurance coverage, marital history, and
  veterans’ service connected disabilities
• 2006-2008 ACS Data will be released Oct. 27, three
  year estimates.




                                                        14
Hints (Warnings)

• Know what level of geography you
  need data
• Know what tables you want
• Download size limit when using Excel
  format option
• Use the “Down Load Center” for large
  downloads- up to 50 tables
                                         15
Contact Information
            Linda Akers Smith
  linda.kane.akers.smith@census.gov
          Timothy McMonagle
Timothy.william.mcmonagle@census.gov

    Los Angeles Regional Census Center
        9301 Corbin Av. Ste 1000
           Northridge, CA 91324
              818-717-6701

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Census Geographic and Data Products

  • 1. Census Geographic and Data Products 2010 HCPO/HIGICC Conference Data Discovery Session Sept 23 - 25, 2009 Linda Akers Smith and Timothy McMonagle Los Angeles Regional Census Center - Geography U.S. Census Bureau 1
  • 2. Topics 2009 TIGER/line Shapefiles Future TIGER/line Shapefile release schedule American Community Survey Data 2010 Decennial Census release schedule 2
  • 3. 2009 TIGER/Line Shapefiles • Release date October 2009 • Additional Shapefiles available – More State-based files • Changed Topological Faces Relationship file to a Shapefile • Improvement in clean-up of feature distortion • Improved Documentation 3
  • 4. Future TIGER/line Release Schedule • 2010 TIGER/line shapefiles – Contains census 2010 geography – State by State in early 2011 – National in early-mid 2011 • Post 2010 TIGER/line shapefiles – 113th Congressional Districts – Urban/Rural, Urban Areas, Metropolitan – TAZ, ZCTAs,SLDs
  • 5. Most Frequently Asked Questions • Where are the streets?: – The streets are in the county-based All Lines (edges) file. There is a Road Flag attribute which indicates if the feature is a road or not • Where is the demographic data? – The TIGER/Line® Shapefiles do not contain demographic data but have all of the necessary information to join the data to them. American FactFinder (http://factfinder.census.gov) is the best resource for electronic survey data from the Census Bureau
  • 6. Changes Under Consideration • In addition to the all lines layer: – Roads only shapefile – Rail only shapefile – Linear hydrography shapefile • In the metadata: – Unique description for each file type – Including the file layout inside the metadata – providing direct links to the file on the Census Bureau’s website – Provide link to the technical documentation on the Census Bureaus website
  • 7. Questions about the TIGER/Line® shapefiles? geo.tiger@census.gov 301.763.1128 • Free public download from our website (see handout): http://www.census.gov/geo/www/tiger/index.html
  • 9. Census Bureau Demographic Data • Decennial Census • American Community Survey • Other Surveys and Censuses 9
  • 11. 11
  • 12. American Community Survey • A large, continuous demographic survey goes to 3 million addresses every year, covers every county in U.S. • Produces annual and multi-year estimates of the characteristics of the population and housing • Produces characteristics, not a population count • Produces information for small areas including tracts, block groups and population subgroups • Full implementation began January 2005 12
  • 13. ACS Data Product Release Schedule Data products are released in the year following the single-year or multi-year period in which data are collected. 13
  • 14. Current ACS Data Release • 2008 ACS data released Sept 22, one year estimates, for the first time includes estimates on health insurance coverage, marital history, and veterans’ service connected disabilities • 2006-2008 ACS Data will be released Oct. 27, three year estimates. 14
  • 15. Hints (Warnings) • Know what level of geography you need data • Know what tables you want • Download size limit when using Excel format option • Use the “Down Load Center” for large downloads- up to 50 tables 15
  • 16. Contact Information Linda Akers Smith linda.kane.akers.smith@census.gov Timothy McMonagle Timothy.william.mcmonagle@census.gov Los Angeles Regional Census Center 9301 Corbin Av. Ste 1000 Northridge, CA 91324 818-717-6701