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Kevin Holmes, Geographer US Census Bureau: Philadelphia Regional Office

Kevin Holmes, Geographer US Census Bureau: Philadelphia Regional Office. Boundary & Annexation Survey (BAS). Overview Geographic Primer BAS Schedule Update Types Participation Methods Response Methods Etc . 2010 Census: Total housing units by tract; Jefferson County, KY.

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Kevin Holmes, Geographer US Census Bureau: Philadelphia Regional Office

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  1. Kevin Holmes, Geographer US Census Bureau: Philadelphia Regional Office

  2. Boundary & Annexation Survey (BAS) Overview • Geographic Primer • BAS • Schedule • Update Types • Participation Methods • Response Methods • Etc. 2010 Census: Total housing units by tract; Jefferson County, KY

  3. The MAF/TIGER Database (MTDB) • Master Address File (MAF) • Topologically Integrated Geographic Encoding and Referencing (TIGER) • Developed to support 1990 Census • Digitized from USGS quads

  4. The “TI” in TIGER • Topological Integration amongst all linear feature classifications • Efficient storage (national coverage) • Helps prevent data gaps (open polygons) • Poses “Rubbersheeting” challenges • “Framework” for tabulation geographies, and govt. boundaries

  5. Census Tabulation Blocks • Smallest geographic unit for data tabulation • Aggregated to larger geographies as needed Highlighted Block Geocode: 211110111144005

  6. CensusTabulation Geographies(Summary Levels) Specific geographies may only tessellate at certain levels, but ALL are built upon Census Tabulation Blocks

  7. Boundary & Annexation Survey (BAS) • Yearly program, updating boundaries & names of legally functioning governmental units Used to tabulate data for: • Decennial Census • Economic Census • Population Estimates Program • American Community Survey (ACS) Census Participants: • Census HQ • National Processing Center (NPC) • Regional Offices (ROs)

  8. BAS Production Schedule* *2014 BAS cancelled. Expected to resurrect in 2015.

  9. BAS Updates

  10. BAS Participation Methods *BAS state agreements can only be established for states that require local govts. to report boundary changes to a state agency. To date, 6 BAS state agreements in place

  11. BAS Response Methods

  12. BAS ETC. Questions?

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