Whats New in Census Geography for Census 2000

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Census 2000 Geographic Products
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Census 2000 Data ProductsMajor Changes

• Wider Product Availability than 1990
• Internet Access - American FactFinder
• Internet Mapping

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Geographic Products Tools to Support User
Needs

• Redistricting
• Maps to Use with Statistical Report
• Digital Products for Special Needs

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Geographic ProductsThe TIGER Data Base

• Topologically Integrated Geographic Encoding
  and Referencing

The source of ALL census geographic products
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Geographic Products TIGER/Line Files

• Redistricting Census 2000 TIGER/Line Files
  Available Now
• Census 2000 TIGER/Line File Available 2nd
  Quarter 2001
• First View of 2000 Block Boundaries
• Available off the TIGER webpage at
  www.census.gov/geo/www/tiger/

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Maps1990 and earlier

• Paper maps
• Predominately black and white
• Large format plots
• Small format prints
• Negatives
• Used in printed reports

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MapsCensus 2000

• Electronic map files
• Wide use of color
• On-demand hard-copy paper maps

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Electronic Map Files

• Media
• Internet
• Compact Disc (CD-ROM)
• Digital Versatile Disc (DVD)
• Format
• Portable Document Format (PDF)
• Hewlett Packard -Graphic Language 2 (HPGL-2)

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Advantages of Digital Formats

• Storage of large volumes of paper maps is reduced
  or eliminated
• Selection of individual map files is possible
• Printing map files is possible on the appropriate
  printers and/or plotters

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Why Portable Document Format (PDF)?

• Free Adobe Acrobat Reader for all platforms
• Thumbnail views of maps
• Pan and zoom capabilities
• Searchable text (geography)
• No need for plotting large sheet maps
• Adobe Acrobat Reader can be downloaded for free
  at www.adobe.com

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On-Demand Paper Maps

• Printed by
• The Census Bureau
• Census partners
• Other various commercial sources
• Selected printed reports/maps
• May be available through
• State Data Center - www.census.gov/sdc/www
• Census Regional Office - www.census.gov/field/www

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Large Format Reference Maps to Support
Redistricting

• Public Law 94-171 Map Products
• County Block Maps
• Show block numbers
• Show voting districts
• Voting district/state legislative district
  outline maps
• Census tract outline maps
• Available www.census.gov/geo/www/index.html

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Reference Maps for Summary Files

• Governmental Unit Block Map
• Counties, Incorporated Places, American Indian
  Areas, Minor Civil Divisions, etc.
• State/County Subdivision Outline Map
• State/County Outline Map
• Available Paper - 2nd quarter 2001 Internet
  (.pdf) - 3rd quarter 2001
• Census Tract Outline Map Available in all
  formats by 2nd quarter 2001

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Reference Maps on American FactFinder
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Additional Reference Maps

• State/County Metropolitan Area Outline Map
• Urbanized Area Outline Map
• Congressional District Map
• Public Use Microdata Sample Map
• Availability beginning 3rd quarter 2001

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State/County Metropolitan Area Outline Map
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Thematic Maps

• Display census demographic data
• Traditional and new topics

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(No Transcript)
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AFF Thematic Map
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Relationship Files

• Relationships (11, 1n, n1)
• Not Equivalency Files (use TIGER/Line)
• Census Tracts 1990-2000
• Similar to 1990 product
• Blocks 1990 - 2000
• 1990 Tabulation to 2000 Collection
• 1990 Tabulation to 2000 Tabulation
• 2000 Collection to 2000 Tabulation
• Availability 3rd quarter 2001

www.census.gov/geo/www/calculate/relate/rel_blk.ht
ml
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Corner Point Files

• Based on map sheet coordinates
• Provided for large format maps only
• Contents
• Sheet Identifier
• Minimum Latitude Longitude
• Maximum Latitude Longitude
• Map Scale
• www.census.gov/ftp/pub/geo/DR/CORNER_P/

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Boundary Files

• Generalized from TIGER data
• For most levels of tabulation geography
• For use by customers mapping software
• ArcView shapefiles
• ArcInfo Export (.e00) files
• ASCII format
• above formats usable in many GIS packages
• Availability beginning 2nd quarter 2001

http//www.census.gov/geo/www/cob/index.html
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WWW.CENSUS.GOV/GEO/WWW/COB
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Metadata
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Questions About Geographic Products?

• E-mail geography_at_census.gov
• URL www.census.gov
• Product order information 301-457-4100
• Geographic questions 301-457-1128