Basic Geographic and Historic Data for Interfacing ICPSR Data Sets, 1620-1983 [United States] (ICPSR 8159)

Published: Nov 6, 2012

Principal Investigator(s):
Robert P. Sechrist

Version V2

This data collection contains the basic information about all counties in the coterminous United States needed for mapping county-based data. It provides an interface between ICPSR datasets and the mapping programs SAS/GRAPH, SURFACE II, and SYMAP. Cloropleth and isopleth maps can be produced by match-merging this dataset with any other dataset (special facilities exist for ICPSR datasets) and running the merged data against a cartographic program. Isopleth mapping programs, using the latitude and longitude coordinates provided for each county seat, can produce maps of ICPSR data. Cloropleth mapping of county-level data can be accomplished after merging by running the merged dataset through SAS/GRAPH. The variables provide state Federal Information Processing (FIPS) codes, county FIPS codes, county names/county seat names, the month, day, and year in which each county was created, the latitude and longitude of county seats, as well as the ICPSR state and county codes.

Sechrist, Robert P. Basic Geographic and Historic Data for Interfacing ICPSR Data Sets, 1620-1983 [United States]. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2012-11-06.

Export Citation:

  • RIS (generic format for RefWorks, EndNote, etc.)
  • EndNote


1620 -- 1983

Time Series

counties within states

administrative records data



2012-11-06 SPSS, SAS, and Stata setup files, as well as SPSS and Stata system files and a SAS transport (CPORT) file have been added to the collection. The codebook has been updated.

1984-07-13 ICPSR data undergo a confidentiality review and are altered when necessary to limit the risk of disclosure. ICPSR also routinely creates ready-to-go data files along with setups in the major statistical software formats as well as standard codebooks to accompany the data. In addition to these procedures, ICPSR performed the following processing steps for this data collection:

  • Created variable labels and/or value labels.
  • Checked for undocumented or out-of-range codes.


  • Data in this collection are available only to users at ICPSR member institutions.

ICPSR logo

This study is provided by ICPSR. ICPSR provides leadership and training in data access, curation, and methods of analysis for a diverse and expanding social science research community.