Development of the Network Base File System (NETBASIS), which has been under way at the University of Washington since 1974, is described. NETBASIS, which is implemented in an interactive graphic computer environment, explicitly builds on geographic base file data to provide a general-purpose transportation network data base together with the required data manipulation and display software. In addition to the standard capabilities of data base input, editing, and retrieval provided by the host data base management system, software has been implemented to allow the user to extract geographic or functional subsets of the network (e.g., arterials only). This extracted network can then be abstracted to remove nonintersection nodes and thus produce an efficient network model that can be used within most existing transportation planning tools. An interactive graphic network editor is also provided that allows the user to modify the extracted and abstracted network to reflect planning options to be analyzed. Segment-specific transportation data, such as transit lines, speed, and capacity, are added to the data base by a FROM-ON-TO coding scheme, which significantly reduces costly and error-prone intermediate data coding. Use of a commercial data based management system with a FORTRAN interface has resulted in significant cost savings in the development of the data input, editing, and retrieval software required to allow users easy access to the network data and to provide maximum flexibility of base file content and structure for adaptation to changing user requirements. /Author/

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 110-116
  • Monograph Title: Transportation system analysis
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00195982
  • Record Type: Publication
  • ISBN: 0309028221
  • Files: TRIS, TRB
  • Created Date: Jul 11 1979 12:00AM