TIGER: Supporting the U' S' Census Bureau and the NSDI

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TIGERSupporting the U. S. Census Bureau and
the NSDI

• Robert A. LaMacchia
• Chief, Geography Division
  NSGIC Mid-Year Meeting
• U. S. Census Bureau
  March 10, 2005

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MTAIP Vision

• A Seamless Digital Map of the United States
  Where Street Centerlines, Based on
  State/County/Local/Tribal GIS Files, and Publicly
  Available Via Standard OGC Protocols

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Thank You For Making The Vision Come to Fruition
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TIGER was realigned using Federal, Tribal, State,
County, Local files

• 1,870 whole county files
• 67 partial counties
• 289 failed files that were spatially enhanced
• 2,226 EXISTING files used for realignment
• plus
• NHD
• Imagery - NAIP, DOQQs,

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Harris Supplied(Balance of Nation)

• Imagery-Commercial
• Existing and new
• Commercial Street Centerlines
• GPS (Driving)

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MTAIP Status

• Harris will deliver ahead of original schedule
• Non-Island areas delivered by March 15
• Island areas delivered by April 1

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The Census Bureau NSDI Contribution

• Fully integrated and seamless
• Public domain
• Incorporates State, Tribal, County, Local Data
• Includes NHD
• Some data developed based on freely available
  imagery
• Can accommodate up to 5 ids on a feature

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TIGER is not THE Answer

• But data can be added
• The Census Bureau does not need turn
  restrictions, number of lanes, etc. But there is
  no reason that the community at large cant
  contribute that information to a national
  transportation dataset.
• TIGER is a contribution to the answer.

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Maintenance

• Use of more recent versions of State/County/Local/
  Tribal files for periodic updates of features and
  attributes (post 2010)
• Looking for State leadership to ensure those
  areas for which the Harris Corp had to provide a
  source will now be maintained at
  State/County/Local/Tribal level

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Maintenance Post 2010

• Continued update of TIGER based on new versions
  of Government GIS files
• Census Bureau Field Operations
• Staff will use GPS equipped laptops to locate new
  housing units/MAF structure points
• Your ideas are needed..
• How do we find these blocks where new housing
  units are not identified from other sources?
• How do we update large areas where there are no
  publicly available updated street files?
• What is the role of the private sector?
• Use of available imagery?

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2008 TIGER/Line Shapefiles

• First product with all counties realigned
• Each layer with its own metadata
• Downloadable by layer

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2008 TIGER/Line Shapefiles

• New file type with new dissemination design
• Looking for suggestions and comments to make the
  distribution intuitive and easy

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Census Bureau Needs

• MTAIP will not be repeated
• Funded to make the one-time upgrade
• We must rely on field operations and partner
  files and in-house processing
• Focusing on 2010 Census for next 3 Years

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More Needs

• National Transportation and Address Databases
• Road Centerlines (7.6 meters or better)
• Street names
• Addresses
• Location/Mailing address
• E911 address (if different)
• Residential Structure coordinates
• Used to obtain geographic codes as well as assist
  field staff to locate
• Boundaries
• Consolidated BAS

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GAPS

• Road Centerlines created by contractor need to
  be maintained at a local level
• BENEFITS
• Geospatial Data will be integrated into an
  existing database and be fully available in the
  public domain

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Questions?
Robert LaMacchia Geography Division 301-763-2131 r
obert.a.lamacchia_at_census.gov