Computer geocoding of travel survey data, which involves use of a geographic base file and a series of user-oriented computer programs, is a workable and preferable alternative to manal geocoding, which is tedious and time-consuming. The basis for the computer geocoding system is the Dual Independent Map Encoding/Geographic Base File (DIME/GBF) developed by the U.S. Bureau of the Census. The DIME/GBF, which exists for all standard metropolitan statistical areas, contains detailed information on street segments, including street name, direction, range of house numbers, and census tract and block. Two programs developed by the U.S. Bureau of the Census. Zipstan and Unimatch, are used to perform the actual geocoding. Zipstan is a preprocessor program that arranges the addresses before being linked by coding on-board and travel surveys in the Boston area indicate that 70 to 80 percent of all addresses can be geocoded to a detailed zone level at a processing cost of $2.12/1000 addresses. Addresses not geocoded automatically are generally incomplete or contain invalid information. The basis for this system, the methods are procedures used in the Boston area, the results of the matching operation, and the costs involved in the effort are presented and discussed. /Author/

Media Info

  • Media Type: Print
  • Features: Figures; Maps; References; Tables;
  • Pagination: pp 105-110
  • Monograph Title: Transportation system analysis
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00195981
  • Record Type: Publication
  • ISBN: 0309028221
  • Files: TRIS, TRB
  • Created Date: Sep 15 1979 12:00AM