| 00 | Primary InterStates |
| 01 | Main Roads - InterStates, U.S. highways or limited-access highways |
| 03 | Secondary Roads or Other highways |
| 04 | Local Connecting or Arterial Roads |
| 05 | Local Roads of high importance or Collector Roads |
| 06 | Local or Light Duty Roads |
| 07 | Local Roads of Minor Importance or Alleys |
| 08 | Other Unpaved Roads or Footpaths |
| A8 | County Boundaries and Census Population |
| A9 | Minor Civil and County Civil Divisions or Boundaries and Census Population Information |
| AP | City and Other Municipal Boundaries. Includes Census Population Information. |
| FE | Ferry Connections |
| GC | Contains all of the lines and attributes required for address geocode operations |
| LS | Line Structures - Includes Bridges, Tunnels and Aqueducts |
| LU | Land Use - Parks |
| MN | Maneuvers - Describes road turns used in routing (Database only - Links to NW |
| MP | Maneuver Path Index - Describes the path of a maneuver. Used in routing (Database only - Links to MN |
| NL | NetLink - Contains Road Type, Direction of Travel, .. Used with NW to facilitate simple Networking/routing solutions (Database only - Links to NW) Not included with Basic data |
| NW | Network - Contains all topological transportation elements. Used to easily make queries on all transportation elements and supports vehicle routing applications ('With Directions' data set only) |
| OA1, OA2 | Other Named Areas - Contains region information for Census areas |
| PD | Postal Districts - Contains region boundaries for U.S. ZIP codes |
| PDEA | Postal Districts Extended Attributes - Links to PD, contains City Names (Database only |
| PI | Points of Interest - Includes landmark and tourist information. Also includes reference points used in routing applications |
| RN | Route Numbers - Contains route numbers, type and direction for all road elements (Database only, links to NW |
| RR | Railroads |
| RS | Road Restrictions - Contains access information to all or part of a road element (Database only, Links to NW or MN table) |
| SG, SP, SI | SignPost - Contains SignPost information relating to postition and content (Database only, Links to NW) |
| SM | ettlement Centers - Contains city point information |
| TA | Transportation Element Belonging to Area - Describes relation between transportation element and the area to which they belong (Database only, links to NW) |
| TD | Time Domains - Contains time information on restrictions described in the RS layer (database only, links to RS) |
| WA | Water Areas - Oceans, Lakes |
| WL | Water Lines - ShoreLines, and River/Stream center lines |