County Boundaries of Selected United States Territories/States, 1790-1980 (ICPSR 9025)
Version Date: Jan 12, 2006 View help for published
Principal Investigator(s): View help for Principal Investigator(s)
John H. Long
https://doi.org/10.3886/ICPSR09025.v1
Version V1
Summary View help for Summary
This cartographic database was created at the University of Wisconsin-Madison Cartographic Laboratory in conjunction with the Newberry Library and the National Endowment for the Humanities. The collection makes it possible to plot any or all of the territorial/state and county boundaries in the region covered by the states of North and South Dakota, Minnesota, Iowa, Missouri, Wisconsin, Illinois, Michigan, Indiana, Ohio, Pennsylvania, New Jersey, Maryland, and Delaware. The data collection also contains the county names, the names and locations of the corresponding capitals and county seats, and information on the shoreline along the Great Lakes and the Atlantic Ocean. All changes in lines, locations, and names are dated to the day according to their legally effective dates. The data collection consists of 38 data files. Part 1 contains all of the cartesian coordinates (in digitizer units) required to define the historical county boundaries for those 14 states. Part 2 contains the "control" needed to convert digitizer units into latitude and longitude. The remaining 36 files contain all of the descriptive information needed to build the appropriate cartographic base for any given date.
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Geographic Coverage View help for Geographic Coverage
Time Period(s) View help for Time Period(s)
Date of Collection View help for Date of Collection
Data Source View help for Data Source
United States Geological Survey maps
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HideOriginal Release Date View help for Original Release Date
1985-03-18
Version History View help for Version History
- Long, John H. County Boundaries of Selected United States Territories/States, 1790-1980. ICPSR09025-v1. [distributor], 1992. http://doi.org/10.3886/ICPSR09025.v1
2006-01-12 All files were removed from dataset 41 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?