The following is a list of the data layers included in the MAPdataUSA 3.0 data set.

Note: Not all layers may be present for all counties.

• Alaskan Native Regional Corporations
• American Indian Tribal Subdivisions (2000 & 2004)
• American Indian/Alaska Native/Hawaiian Homeland Areas (2000 & 2004)
• Block Groups (2000 & 2004)
• Census Blocks (2000 & 2004)
• Census Tracts (2000 & 2004)
• Congressional Districts (106th)
• Congressional Districts (108th)
• Consolidated Metropolitan Statistical Areas
• Correction Count Polygons
  
• County Boundaries (2000 & 2004)
• County Subdivisions (2000 & 2004)
• Designated Places (2000 & 2004)
• Economic Census Combined Statistical Areas
• Economic Census Commercial Regions
• Economic Census Counties
• Economic Census Places
  
• Landmark Polygons
• Metropolitan and Micropolitan Statistical Areas
• Metropolitan Divisions
  
• New England City and Town Areas
• New England City and Town Areas (combined)
  
• New England County Metropolitan Areas
  
• Oregon Urban Growth Area
• Primary Metropolitan Statistical Areas
• Public Use Microdata Areas - 1% sample
• Public Use Microdata Areas - 5% sample
• School Districts – Elementary (2000 & 2004)
• School Districts – Secondary (2000 & 2004)
• School Districts – Unified (2000 & 2004)
• State Legislative District Lower Chamber
• State Legislative District Upper Chamber
• Subbarrios (2000 & 2004)
• Traffic Analysis Zones
• Urban Areas
• Voting Districts (2000)
• Water Polygons
• ZIP Code Tabulation Areas (3-digit & 5-digit) (2000 & 2004)

• Hydrography (water lines such as rivers and canals etc.)
• Landmarks Lines
• Miscellaneous Transportation
• Non-visible Lines
• Physical Features
• Railways
• Roads
• Unknown Lines

• Roads
• Linear hydrographic features (rivers, canals etc.)

• Landmark points
• TIGER polygon centroids
  

• 108th and 109th Congressional districts (all US)
  
• County boundries by state
• ZIP code tabulation areas by state

• Additional address matching information for roads
• Alternative feature names for roads
• Polygons which correspond to multiple landmarks
  
• ZIP+4 left and right information for roads