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

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 the data.

Dataset(s)

WARNING: Because this study has many datasets, the download all files option has been suppressed, and you will need to download one dataset at a time.

DS0:  Study-Level Files
Documentation:
DS1:  Map Information/DBGEN File [MPDBRNGS] - Download All Files (480 KB)
Data:
DS2:  DBGEN/Coordinate File [DBCOORDXY] - Download All Files (2,530 KB)
Data:
DS3:  Datesfile: Maryland, Delaware, and Pennsylvania [MDDLPA46] - Download All Files (555 KB)
Data:
DS4:  Datesfile: New Jersey [NJ46] - Download All Files (499 KB)
Data:
DS5:  Datesfile (County Seats): Maryland, Delaware, Pennsylvania, and New Jersey [NAME46] - Download All Files (484 KB)
Data:
DS6:  State Codes [NMSTATES] - Download All Files (474 KB)
Data:
DS7:  City Codes [CTYNMS] - Download All Files (731 KB)
Data:
DS8:  Datesfile: Ohio, Part I [DTOHIO1] - Download All Files (601 KB)
Data:
DS9:  Datesfile: Ohio, Part II [DTOHIO2] - Download All Files (581 KB)
Data:
DS10:  Datesfile (County Seats): Ohio [NMOHIO] - Download All Files (483 KB)
Data:
DS11:  Datesfile: Indiana [DTINDN] - Download All Files (753 KB)
Data:
DS12:  Datesfile (County Seats): Indiana [NMINDIANA] - Download All Files (484 KB)
Data:
DS13:  Datesfile: Illinois [DTILL] - Download All Files (603 KB)
Data:
DS14:  Datesfile (County Seats): Illinois [NMILL] - Download All Files (487 KB)
Data:
DS15:  Datesfile: Wisconsin [DTWISC] - Download All Files (690 KB)
Data:
DS16:  Datesfile (County Seats): Wisconsin [NMWISC] - Download All Files (482 KB)
Data:
DS17:  Datesfile: Michigan [DTMICH] - Download All Files (731 KB)
Data:
DS18:  Datesfile (County Seats): Michigan [NMMICH] - Download All Files (482 KB)
Data:
DS19:  Datesfile: Minnesota [DTMN] - Download All Files (651 KB)
Data:
DS20:  Datesfile (County Seats): Minnesota [NMMN] - Download All Files (485 KB)
Data:
DS21:  Datesfile: Iowa [DTIA] - Download All Files (638 KB)
Data:
DS22:  Datesfile (County Seats): Iowa [MNIA] - Download All Files (486 KB)
Data:
DS23:  Datesfile: Missouri [DTMO] - Download All Files (846 KB)
Data:
DS24:  Datesfile (County Seats): Missouri [NMMO] - Download All Files (489 KB)
Data:
DS25:  Datesfile: North Dakota [DTND] - Download All Files (651 KB)
Data:
DS26:  Datesfile (County Seats): North Dakota [NMND] - Download All Files (474 KB)
Data:
DS27:  Datesfile: South Dakota [DTSD] - Download All Files (678 KB)
Data:
DS28:  Datesfile (County Seats): South Dakota [NMSD] - Download All Files (486 KB)
Data:
DS29:  Datesfile: Northwest Territory [DT60] - Download All Files (602 KB)
Data:
DS30:  Datesfile: Ohio, Illinois Territory, and Indiana Territory [DT3958] - Download All Files (931 KB)
Data:
DS31:  Datesfile: Illinois, Indiana, and Ohio [DT1739] - Download All Files (1,026 KB)
Data:
DS32:  Datesfile: Michigan Territory [DT59] - Download All Files (638 KB)
Data:
DS33:  Datesfile: Illinois, Wisconsin Territory, and Michigan Territory [DT1759] - Download All Files (488 KB)
Data:
DS34:  Datesfile: Michigan and Wisconsin Territory [DT2661] - Download All Files (718 KB)
Data:
DS35:  Datesfile: Michigan and Wisconsin [DT2655] - Download All Files (716 KB)
Data:
DS36:  Datesfile: Iowa, Missouri, and Iowa Territory [DT1963] - Download All Files (876 KB)
Data:
DS37:  Datesfile: Iowa, Missouri, and Iowa Territory [DT1963A] - Download All Files (476 KB)
Data:
DS38:  Datesfile: Minnesota, Dakota Territory, and Minnesota Territory [DT2767] - Download All Files (705 KB)
Data:
DS39:  Datesfile: Minnesota, Dakota Territory, and Minnesota Territory [DT2767A] - Download All Files (636 KB)
Data:
DS40:  Datesfile: Minnesota, North Dakota, and South Dakota [DT2746] - Download All Files (609 KB)
Data:

Study Description

Citation

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

Related Publications

Utilities

Metadata Exports

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