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National Transportation Atlas Databases: 1995
  • Published Date:
    1995-01-01
  • Language:
    English
Filetype[ZIP-114.17 MB]


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National Transportation Atlas Databases: 1995
Details:
  • Resource Type:
  • Geographical Coverage:
  • Format:
  • Abstract:
    BTS has compiled the initial version of a geographic atlas database to support research, analysis, and decision making across all modes of transportation. The atlas databases are designed primarily to meet the needs of DOT at the national level, but can have major applications at State and local levels throughout the transportation community. The atlas databases are the basis for maps that portray the extent and connectivity of the nation's transportation system, thematic maps that portray the use and consequences of transportation, and GIS databases used to develop the maps and analyze transportation networks. This version emphasizes location and modal connectivity information.

    This product is distributed in shapefile format. The shapefile is an open format created by the Environmental Systems Research Institute (ESRI). You can find additional information about the format at: www.esri.com/library/whitepapers/pdfs/shapefile.pdf

    The NTAD1995 databases are designed for use within a geographic information system (GIS); however, the attribute data for each dataset can be accessed in any database, spreadsheet, or other software package. This information is stored in dBASE format. Because of spreadsheet limitations, many of the larger dBASE files will not open correctly with spreadsheet software. It is important to note that users who manipulate attribute data outside of their GIS may alter the shapfiles’ linkage between the attribute and spatial data.

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