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Codebook for NHGIS data file 'nhgis0004_ds5_1830_county'
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Contents
    - Data Summary
    - Data Dictionary
    - Citation and Use
 
Additional documentation on NHGIS data sources is available at: 
    https://www.nhgis.org/documentation/tabular-data 
 
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Data Summary
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Year:             1830
Geographic level: County (by State)
Dataset:          1830 Census: Population Data [US, States & Counties]
   NHGIS code:    1830_cPop
   NHGIS ID:      ds5
 
Tables:
 
1. Colored Population by Slave Status by Sex by Age
   Universe:    Colored Persons
   Source code: NT5
   NHGIS code:  ABX
 
2. Race/Slave Status by Sex
   Universe:    Persons
   Source code: NT12
   NHGIS code:  ABO
 
3. Colored Population by Slave Status
   Universe:    Colored Persons
   Source code: NT15
   NHGIS code:  ABQ
 
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Data Dictionary
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Context Fields 
    GISJOIN:     GIS Join Match Code
    YEAR:        Data File Year
    STATE:       State Name
    STATEA:      State Code
    COUNTY:      County Name
    COUNTYA:     County Code
    AREANAME:    Area name
 
Table 1:     Colored Population by Slave Status by Sex by Age
Universe:    Colored Persons
Source code: NT5
NHGIS code:  ABX
    ABX001:      Slave >> Male >> Under 10 years of age
    ABX002:      Slave >> Male >> 10 to 23 years of age
    ABX003:      Slave >> Male >> 24 to 35 years of age
    ABX004:      Slave >> Male >> 36 to 54 years of age
    ABX005:      Slave >> Male >> 55 to 99 years of age
    ABX006:      Slave >> Male >> 100 years of age and over
    ABX007:      Slave >> Female >> Under 10 years of age
    ABX008:      Slave >> Female >> 10 to 23 years of age
    ABX009:      Slave >> Female >> 24 to 35 years of age
    ABX010:      Slave >> Female >> 36 to 54 years of age
    ABX011:      Slave >> Female >> 55 to 99 years of age
    ABX012:      Slave >> Female >> 100 years of age and over
    ABX013:      Free >> Male >> Under 10 years of age
    ABX014:      Free >> Male >> 10 to 23 years of age
    ABX015:      Free >> Male >> 24 to 35 years of age
    ABX016:      Free >> Male >> 36 to 54 years of age
    ABX017:      Free >> Male >> 55 to 99 years of age
    ABX018:      Free >> Male >> 100 years of age and over
    ABX019:      Free >> Female >> Under 10 years of age
    ABX020:      Free >> Female >> 10 to 23 years of age
    ABX021:      Free >> Female >> 24 to 35 years of age
    ABX022:      Free >> Female >> 36 to 54 years of age
    ABX023:      Free >> Female >> 55 to 99 years of age
    ABX024:      Free >> Female >> 100 years of age and over
 
Table 2:     Race/Slave Status by Sex
Universe:    Persons
Source code: NT12
NHGIS code:  ABO
    ABO001:      White >> Male
    ABO002:      White >> Female
    ABO003:      Nonwhite: Slave >> Male
    ABO004:      Nonwhite: Slave >> Female
    ABO005:      Nonwhite: Free >> Male
    ABO006:      Nonwhite: Free >> Female
 
Table 3:     Colored Population by Slave Status
Universe:    Colored Persons
Source code: NT15
NHGIS code:  ABQ
    ABQ001:      Slave
    ABQ002:      Free
 
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Citation and Use of NHGIS Data
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All persons are granted a limited license to use this documentation and the
accompanying data, subject to the following conditions:

* Publications and research reports employing NHGIS data (either tabular or GIS)
  must cite it appropriately. The citation should include the following:

    Minnesota Population Center. National Historical Geographic Information
    System: Version 2.0. Minneapolis, MN: University of Minnesota 2011.

* Publications and research reports employing school attendance areas data
  (either tabular or GIS) must cite it appropriately. The citation should
  include the following:

    The College of William and Mary and the Minnesota Population Center.
    School Attendance Boundary Information System (SABINS): Version 1.0.
    Minneapolis, MN: University of Minnesota 2011.

* If possible, citations should also include the URL for the NHGIS site:

    https://www.nhgis.org/

* If possible, citations involving school attendance areas should also include
  the URL for the SABINS site:

    http://www.sabinsdata.org/

In addition, we request that users send us a copy of any publications, research
reports, or educational material making use of the data or documentation.
Printed matter should be sent to:

    NHGIS
    Minnesota Population Center
    University of Minnesota
    50 Willey Hall
    225 19th Ave S
    Minneapolis, MN 55455

Send electronic material to: nhgis@umn.edu