Geographic Base File/Dual Independent Map Encoding (GBF/DIME), 1980 (ICPSR 8378)
Version Date: Jan 12, 2006 View help for published
Principal Investigator(s): View help for Principal Investigator(s)
United States. Bureau of the Census
https://doi.org/10.3886/ICPSR08378.v1
Version V1
Summary View help for Summary
A Geographic Base File is a map in machine-readable form, and Dual Independent Map Encoding is the method used for this collection to encode map features in data files. These files have been created for most metropolitan areas. GBF/DIME does not contain individual house addresses, names, or other means of identifying individuals, and it does not contain statistical information. This collection provides a means to structure, compare, and display data, and relate this information to small geographic areas. ICPSR also has the Special Program Information Tape (SPIT) produced by the Census Bureau (See ICPSR 8372), which contains several computer programs designed for use with the GBF/DIME files.
Citation View help for Citation
Export Citation:
Subject Terms View help for Subject Terms
Geographic Coverage View help for Geographic Coverage
Distributor(s) View help for Distributor(s)
Time Period(s) View help for Time Period(s)
Data Collection Notes View help for Data Collection Notes
-
The files are ordered by SMSA and MSA code numbers, with one file per area. The same documentation is used for both SMSA and MSA files. Each record within a file identifies a segment of a map feature by its node points, address ranges, and geographic units (blocks, census tracts, places, counties). Records are included for non-street map features such as railroads, streams, and political boundaries, as well as for streets. Node points identify the intersections, directions changes, and terminations of these features.
Universe View help for Universe
These geographic reference files cover the urbanized core of 278 Standard Metropolitan Statistical Areas (SMSAs) for which files were developed or updated for the 1980 Census. The collection also contains Metropolitan Statistical Area (MSA) data for 47 selected MSAs. The remaining MSA files are forthcoming and more may be prepared in the future.
Data Type(s) View help for Data Type(s)
HideOriginal Release Date View help for Original Release Date
1985-05-24
Version History View help for Version History
- United States. Bureau of the Census. Geographic Base File/Dual Independent Map Encoding (GBF/DIME), 1980. ICPSR08378-v1. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 1985. http://doi.org/10.3886/ICPSR08378.v1
2006-01-12 All files were removed from dataset 398 and flagged as study-level files, so that they will accompany all downloads.
Notes
These data are freely available to data users at ICPSR member institutions. The curation and dissemination of this study are provided by the institutional members of ICPSR. How do I access ICPSR data if I am not at a member institution?