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County Boundaries of Selected United States Territories/States, 1790-1980 (ICPSR 9025)

Principal Investigator(s):

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.

Access Notes

  • These data are available only to users at ICPSR member institutions. Because you are not logged in, we cannot verify that you will be able to download these data.

Dataset(s)

DS0:  Study-Level Files
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DS1:  Map Information/DBGEN File [MPDBRNGS] - Download All Files (0.5 MB)
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DS2:  DBGEN/Coordinate File [DBCOORDXY] - Download All Files (2.5 MB)
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DS3:  Datesfile: Maryland, Delaware, and Pennsylvania [MDDLPA46] - Download All Files (0.6 MB)
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DS4:  Datesfile: New Jersey [NJ46] - Download All Files (0.5 MB)
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DS5:  Datesfile (County Seats): Maryland, Delaware, Pennsylvania, and New Jersey [NAME46] - Download All Files (0.5 MB)
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DS6:  State Codes [NMSTATES] - Download All Files (0.5 MB)
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DS7:  City Codes [CTYNMS] - Download All Files (0.7 MB)
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DS8:  Datesfile: Ohio, Part I [DTOHIO1] - Download All Files (0.6 MB)
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DS9:  Datesfile: Ohio, Part II [DTOHIO2] - Download All Files (0.6 MB)
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DS10:  Datesfile (County Seats): Ohio [NMOHIO] - Download All Files (0.5 MB)
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DS11:  Datesfile: Indiana [DTINDN] - Download All Files (0.8 MB)
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DS12:  Datesfile (County Seats): Indiana [NMINDIANA] - Download All Files (0.5 MB)
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DS13:  Datesfile: Illinois [DTILL] - Download All Files (0.6 MB)
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DS14:  Datesfile (County Seats): Illinois [NMILL] - Download All Files (0.5 MB)
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DS15:  Datesfile: Wisconsin [DTWISC] - Download All Files (0.7 MB)
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DS16:  Datesfile (County Seats): Wisconsin [NMWISC] - Download All Files (0.5 MB)
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DS17:  Datesfile: Michigan [DTMICH] - Download All Files (0.7 MB)
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DS18:  Datesfile (County Seats): Michigan [NMMICH] - Download All Files (0.5 MB)
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DS19:  Datesfile: Minnesota [DTMN] - Download All Files (0.7 MB)
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DS20:  Datesfile (County Seats): Minnesota [NMMN] - Download All Files (0.5 MB)
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DS21:  Datesfile: Iowa [DTIA] - Download All Files (0.6 MB)
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DS22:  Datesfile (County Seats): Iowa [MNIA] - Download All Files (0.5 MB)
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DS23:  Datesfile: Missouri [DTMO] - Download All Files (0.8 MB)
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DS24:  Datesfile (County Seats): Missouri [NMMO] - Download All Files (0.5 MB)
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DS25:  Datesfile: North Dakota [DTND] - Download All Files (0.7 MB)
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DS26:  Datesfile (County Seats): North Dakota [NMND] - Download All Files (0.5 MB)
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DS27:  Datesfile: South Dakota [DTSD] - Download All Files (0.7 MB)
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DS28:  Datesfile (County Seats): South Dakota [NMSD] - Download All Files (0.5 MB)
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DS29:  Datesfile: Northwest Territory [DT60] - Download All Files (0.6 MB)
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DS30:  Datesfile: Ohio, Illinois Territory, and Indiana Territory [DT3958] - Download All Files (0.9 MB)
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DS31:  Datesfile: Illinois, Indiana, and Ohio [DT1739] - Download All Files (1 MB)
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DS32:  Datesfile: Michigan Territory [DT59] - Download All Files (0.6 MB)
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DS33:  Datesfile: Illinois, Wisconsin Territory, and Michigan Territory [DT1759] - Download All Files (0.5 MB)
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DS34:  Datesfile: Michigan and Wisconsin Territory [DT2661] - Download All Files (0.7 MB)
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DS35:  Datesfile: Michigan and Wisconsin [DT2655] - Download All Files (0.7 MB)
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DS36:  Datesfile: Iowa, Missouri, and Iowa Territory [DT1963] - Download All Files (0.9 MB)
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DS37:  Datesfile: Iowa, Missouri, and Iowa Territory [DT1963A] - Download All Files (0.5 MB)
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DS38:  Datesfile: Minnesota, Dakota Territory, and Minnesota Territory [DT2767] - Download All Files (0.7 MB)
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DS39:  Datesfile: Minnesota, Dakota Territory, and Minnesota Territory [DT2767A] - Download All Files (0.6 MB)
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DS40:  Datesfile: Minnesota, North Dakota, and South Dakota [DT2746] - Download All Files (0.6 MB)
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Study Description

Citation

Long, John H. County Boundaries of Selected United States Territories/States, 1790-1980. ICPSR09025-v1. [distributor], 1992. http://doi.org/10.3886/ICPSR09025.v1

Persistent URL:

Export Citation:

  • RIS (generic format for RefWorks, EndNote, etc.)
  • EndNote XML (EndNote X4.0.1 or higher)

Funding

This study was funded by:

  • National Endowment for the Humanities

Scope of Study

Subject Terms:   counties, computer aided mapping, computer programs, databases, geographic information systems, historical data, information systems, mapping

Geographic Coverage:   Delaware, Illinois, Indiana, Iowa, Maryland, Michigan, Minnesota, Missouri, New Jersey, North Dakota, Ohio, Pennsylvania, South Dakota, United States, Wisconsin

Time Period:  

  • 1790--1980

Date of Collection:  

  • 1975--1981

Data Types:   mapping data

Methodology

Data Source:

United States Geological Survey maps

Version(s)

Original ICPSR Release:  

Version History:

  • 2006-01-12 All files were removed from dataset 41 and flagged as study-level files, so that they will accompany all downloads.
  • 2006-01-12 All files were removed from dataset 41 and flagged as study-level files, so that they will accompany all downloads.

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