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2010 Census Redistricting Data What You Should Know

2010 Census Redistricting Data What You Should Know. Oregon State Data Center Affiliates November 4, 2010 Portland. 2010 Census Data A Review. Determine apportionment of the U.S. House of Representatives Used for congressional and legislative redistricting

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2010 Census Redistricting Data What You Should Know

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  1. 2010 Census Redistricting DataWhat You Should Know Oregon State Data Center Affiliates November 4, 2010 Portland

  2. 2010 Census DataA Review • Determine apportionment of the U.S. House of Representatives • Used for congressional and legislative redistricting • County and city governments use census data to redraw the boundaries of local political subdivisions including county councils • Affects the allocation of more than $400 billion in federal funding per year to local, state and tribal governments

  3. Imagine this December . . . • Nine short months after data collection began . . . • Apportionment numbers are known • Ideal size of a congressional district is understood • ACS 5-year estimates are released, providing characteristics on . . . • State legislative districts • Congressional districts

  4. Redistricting and the 5-year ACS Estimates • ACS 5- year estimates will contain demographics for current state legislative districts • Legislators will see recent data for their districts for the first time since those districts were drawn • The Block Group data everyone wants may be staggered on an FTP release, a short time after the ACS 5-year release.

  5. We’re Nearly Done • P.L. 94-171 redistricting data files are delivered to all states - - no later than March 31, 2011 • Maps and block assignment files released Spring 2011 • Advanced group quarters data released in May 2011 via FTP • Block group data from the ACS released via FTP a short time after the release of the 5-year estimates

  6. What’s New on the P.L. Files Per the states’ recommendations following Census 2000 we have added: • School district summaries • Unified • Secondary • Elementary • This dramatically increases the size of the files

  7. In Addition to School District Summaries . . . Per the states’ recommendations following Census 2000 we have added: • A new table on housing unit status • Vacant/Occupied • Four population tables remain the same from previous censuses • Total population • Race • Ethnicity • Voting age

  8. Redistricting Data andSupporting Products • TIGER Line Shapefiles • Maps • Block Assignment Files

  9. What About the Maps? • Map files for the 2010 Census include: • P.L. 94-171 County Block Map • P.L. 94-171 Voting District / State Legislative District (VTD / SLD) Reference Map • 2010 Census Census Tract Reference Map • 2010 Census School District Reference Map

  10. County Block Map: Index Sheet Sheet 38

  11. County Block Map – Cropped

  12. VTD / SLD Reference Map- Cropped

  13. Census Tract Reference Map - Cropped

  14. School District Reference Map - Cropped

  15. County Block Map: Sheet 38 Cropped Area

  16. Block Assignment Files • Block Assignment Files (New for 2010) • Congressional • State Legislative • Voting Districts • School Districts (Elementary, Secondary, Unified) • Incorporated Places + Census Defined Places • AIANNH Areas • Names Look-up Tables • Incorporated Place CDP exception

  17. Redistricting Data Delivery:How Will This Occur? • Currently we are collecting the home district / capital district addresses for official recipients including governors and legislative leaders • Challenges • Time spread of deliveries • Changes resulting from elections

  18. November Elections • 37 Governors • 6,315 legislative elections • Only MS, VA, NJ and LA without elections this November • Timing of leadership determination • We must secure names / addresses of these folks in advance of deliveries

  19. Redistricting Data DeliveryProcess • As required by law—data must be delivered in a non-partisan manner • Therefore, we make the following concurrent shipments • Governors • Majority and minority leaders • Commission directors (when we know who they are) • Redistricting committees (when we know who they are)

  20. Redistricting Data DeliveryNew At the request of Race and Ethnic Advisory Committee • As we ship data to each state we will simultaneously issue an alert to all land- based American Indian Reservations, Alaska Native Village Statistical Areas, Alaska Native Regional Corporations, Oklahoma Tribal Statistical Areas. • Letters will be sent with a link to our Redistricting Data Program home page, where we will post URLs to the data products that are released - - details in progress

  21. Redistricting Data Delivery Process for Delivery • Redistricting Data Office (RDO) will ship Monday thru Thursday • RDO will confirm bi-partisan receipt Tuesday thru Friday • DADS will deploy data onto the American FactFinder for immediate public access following confirmation and within 24 hours Wednesday through Saturday

  22. Redistricting Data DeliveryContents of Shipped Redistricting File • Population tables (4) including: • Total population • Population by race • Population by ethnicity Hispanic or Latino • Population by Voting Age • Housing—vacancy status—new for 2010

  23. Redistricting Data DeliveryProcess for Delivery of Geographic Products • We will begin delivery of TIGER shapefiles beginning after Thanksgiving and be done by late January before the data come out • First peek at 2010 tabulation blocks, census tracts, and block groups • Shapefiles will be posted on GEO homepage • RDO homepage will post links to all redistricting data including the geo products • One stop shopping. www.census.gov/rdo

  24. What Will the Geographic Summaries Look Like? • State/County • Census Tract/Block group/tabulation block • Voting District (46 states) • State Legislative District/Congressional District • School Districts • Unified / Secondary /Elementary • New for 2010 • American Indian/Alaska Native Areas

  25. Advance Group Quarters File • In addition to: • Maps • Shapefiles • Data • Advance Group Quarters file • To be released by by the Bureau May 2011 • Intended to facilitate two programs • Redistricting • Count Question Resolution

  26. May 2011A Review • Advance Group Quarters File • Demographic Profiles • ACS release of 5-year data at the block group level via FTP only-need to watch the initial 5 year release timing

  27. 2010 Census Releases: 2011 - 2013 • Demographic Profiles: May 2011 • Summary File 1: June-August 2011 • Summary File 2: December 2011-April 2012 • Congressional District Summary File for the 113th Congress: January 2013 • Legislative Districts: June 2013

  28. What Comes Next?Collect Post-2010 Census Redistricting Plans • 2012-2013 • Collection of newly drawn congressional and legislative district boundaries • Tabulation of 2010 Census data to those new districts • Release of data via DVD and AFF

  29. What Follows Next: Evaluation and Recommendations for 2020 Census • The “View From the States” will appear in a final publication and will be used to formulate the 2020 Census Redistricting Data Program • See publication

  30. For more information on the Redistricting Data Programwww.census.gov/rdoCheck this site for breaking news

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