2012 Census of Agriculture County-Level Boundaries, (CoUS_GCS12.shp -.shx, -.dbf, -.sbn, -.sbx, -.prj, CoAK_GCS12.shp -.shx, -.dbf, -.sbn, -.sbx, -.prj, CoHI_GCS12.shp -.shx, -.dbf, -.sbn, -.sbx, -.prj, CoPR_GCS12.shp -.shx, -.dbf, -.sbn, -.sbx, -.prj)

Frequently-anticipated questions:


What does this data set describe?

Title:
2012 Census of Agriculture County-Level Boundaries, (CoUS_GCS12.shp -.shx, -.dbf, -.sbn, -.sbx, -.prj, CoAK_GCS12.shp -.shx, -.dbf, -.sbn, -.sbx, -.prj, CoHI_GCS12.shp -.shx, -.dbf, -.sbn, -.sbx, -.prj, CoPR_GCS12.shp -.shx, -.dbf, -.sbn, -.sbx, -.prj)
Abstract:
The United States Department of Agriculture (USDA), National Agricultural Statistics Service (NASS) conducted an Agricultural Census in 2012. The statistical census data are summarized at the county, state, and U.S. levels and are available in a digital format. The Research and Development Division of NASS modified generalized county boundaries to show geographic areas for which the 2012 Agricultural Census statistics are reported at the county level. These county-level boundary files were used in the production of the 2012 Census of Agriculture, thematic census maps of the United States. The boundary files can be employed in a Geographic Information System (GIS) with the 2012 Agricultural Census statistical data by using the Agricultural Census county codes to associate the county-level spatial entities with the county-level statistical data.
Supplemental_Information:
These Agricultural Census county-level boundary files may be used with statistical data in the 2012 Census of Agriculture, Volume 1, Geographic Area Series, Parts 1 - 50, 52.
  1. How should this data set be cited?

    United States Department of Agriculture, National Agricultural Statistics Service, 2014, 2012 Census of Agriculture County-Level Boundaries, (CoUS_GCS12.shp -.shx, -.dbf, -.sbn, -.sbx, -.prj, CoAK_GCS12.shp -.shx, -.dbf, -.sbn, -.sbx, -.prj, CoHI_GCS12.shp -.shx, -.dbf, -.sbn, -.sbx, -.prj, CoPR_GCS12.shp -.shx, -.dbf, -.sbn, -.sbx, -.prj): U.S. Department of Agriculture, National Agricultural Statistics Service, Fairfax, Virginia.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -179.14734
    East_Bounding_Coordinate: -65.22157
    North_Bounding_Coordinate: 71.352561
    South_Bounding_Coordinate: 17.926875

  3. Does the data set describe conditions during a particular time period?

    Beginning_Date: 2012
    Ending_Date: 2014
    Currentness_Reference:
    2014: Publication of county-level boundaries and land areas. 2012-2013: Production of county-level boundaries and land areas.

  4. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: vector digital data

  5. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      Indirect_Spatial_Reference:
      American National Standards Institute, INCITS 31:200x, (Formerly FIPS 6-4) Codes for the identification of Counties and Equivalent Entities of the United States, its Possessions, and Insular Areas. <http://www.census.gov/geo/www/ansi/ansi.html>
      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • G-Polygon (3157)

    2. What coordinate system is used to represent geographic features?

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest .000001. Longitudes are given to the nearest .000001. Latitude and longitude values are specified in Decimal Degrees.

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.257222.

  6. How does the data set describe geographic features?

    CoUS_GCS12/CoAK_GCS12/CoHI_GCS12/CoPR_GCS12
    County-level boundaries of geographic areas for which 2012 Agricultural Census statistics are reported. (Source: USDA, National Agricultural Statistics Service.)

    FID
    Internal feature identification number. (Source: ESRI)

    Sequential unique whole numbers automatically generated.

    SHAPE
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    ATLAS_STCO
    Full Agricultural Census state-county equivalent code. (Source: USDA, National Agricultural Statistics Service)

    ATLAS_STCO
    Formal codeset
    Codeset Name: U.S. Department of Commerce, 1990, Counties and Equivalent Entities of The United States, Its Possessions, and Associated Areas (Federal Information Processing Standard 6-4): Washington, D.C. National Institute of Standards and Technology.
    Codeset Source: U.S. Bureau of the Census

    ATLAS_NAME
    Lowercase county equivalent (or agriculture area) name. (Source: USDA, National Agricultural Statistics Service)

    ATLAS_NAME
    Formal codeset
    Codeset Name: U.S. Department of Commerce, 1990, Counties and Equivalent Entities of The United States, Its Possessions, and Associated Areas (Federal Information Processing Standard 6-4): Washington, D.C. National Institute of Standards and Technology.
    Codeset Source: U.S. Bureau of the Census

    ATLAS_CAPS
    Uppercase county equivalent (or agriculture area) name. (Source: USDA, National Agricultural Statistics Service)

    ATLAS_CAPS
    Formal codeset
    Codeset Name: U.S. Department of Commerce, 1990, Counties and Equivalent Entities of The United States, Its Possessions, and Associated Areas (Federal Information Processing Standard 6-4): Washington, D.C. National Institute of Standards and Technology.
    Codeset Source: U.S. Bureau of the Census

    ATLAS_AREA
    Land area in square miles of a county equivalent (or agriculture area). (Source: USDA, National Agricultural Statistics Service)

    ATLAS_AREA
    Range of values
    Minimum: 4.845 (actual value, not min. range value)
    Maximum: 265722.87 (actual value, not max. range value)
    Units: Square mile

    ATLAS_ACRE
    Land area in acres of a county equivalent (or agriculture area). (Source: USDA, National Agricultural Statistics Service)

    ATLAS_ACRE
    Range of values
    Minimum: 3100.8 (actual value, not min. range value)
    Maximum: 170062636.8 (actual value, not max. range value)
    Units: Acre

    ENTITY
    Type of county-level entity. (Source: USDA, National Agricultural Statistics Service)

    ENTITY
    Value Definition
    County, Parish, Municipio, Agricultural Census Area Type of county-level entity.

    CNTYA
    Agricultural Census county equivalent character codes (Source: USDA, National Agricultural Statistics Service)

    CNTYA
    Formal codeset
    Codeset Name: U.S. Department of Commerce, 1990, Counties and Equivalent Entities of The United States, Its Possessions, and Associated Areas (Federal Information Processing Standard 6-4): Washington, D.C. National Institute of Standards and Technology.
    Codeset Source: U.S. Bureau of the Census

    CNTYN
    Agricultural Census county equivalent numeric codes (Source: USDA, National Agricultural Statistics Service)

    CNTYN
    Formal codeset
    Codeset Name: U.S. Department of Commerce, 1990, Counties and Equivalent Entities of The United States, Its Possessions, and Associated Areas (Federal Information Processing Standard 6-4): Washington, D.C. National Institute of Standards and Technology.
    Codeset Source: U.S. Bureau of the Census


Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

    Research and Development Division staff

  3. To whom should users address questions about the data?

    Spatial Analysis Research Section staff
    USDA/NASS/RDD/GIB/SARS
    3251 Old Lee Highway, Suite 305
    Fairfax, VA 22030

    703-877-8000 (voice)
    703-877-8044 (FAX)
    HQ_RDD_OD_Staff@nass.usda.gov


Why was the data set created?

The boundaries are intended for geographic display and analysis at the county- level. The boundary data are designed for small scale thematic mapping applications at a scale of 1:20,000,000 or smaller (e.g., 1:50,000,000, etc.). The county-level boundaries are provided "as is". The USDA/NASS does not warrant the results you may obtain using the Agricultural Census county-level boundary data.


How was the data set created?

  1. From what previous works were the data drawn?

    USCOBDY12 (source 1 of 8)
    U.S. Bureau of the Census, Geography Division, 2012, counties_2012_20_million.shp, -.shx, -.dbf (Generalized digital vector files): U.S. Bureau of the Census, Geography Division, Suitland, MD.

    Type_of_Source_Media: online
    Source_Scale_Denominator: 20000000
    Source_Contribution: spatial and attribute information

    USCOAREA12 (source 2 of 8)
    U.S. Bureau of the Census, Geography Division, 2012, counties_2012_area_perim.DBF (2012 U.S. county land area, perimeter data): U.S. Bureau of the Census, Geography Division, Suitland, MD.

    Type_of_Source_Media: online
    Source_Contribution: attribute information

    USCOFIPSCONV (source 3 of 8)
    USDA, National Agricultural Statistics Service, 2012, 2012 county-level boundary files with FIPS codes converted to Agricultural Census county codes: USDA, National Agricultural Statistics Service, Washington, DC.

    Type_of_Source_Media: paper
    Source_Contribution: attribute information

    SQMIUSCO12 (source 4 of 8)
    USDA, National Agricultural Statistics Service, 2012, 2012 county-level boundary files populated with land area values in square miles: USDA, National Agricultural Statistics Service, Washington, DC.

    Type_of_Source_Media: online
    Source_Contribution: attribute information

    SUMSQMIUSCO12 (source 5 of 8)
    USDA, National Agricultural Statistics Service, 2012, 2012 Agricultural Census county-level boundary files created and land area summed: USDA, National Agricultural Statistics Service, Washington, DC.

    Type_of_Source_Media: online
    Source_Scale_Denominator: 20000000
    Source_Contribution: spatial and attribute information

    ACREUSCO12 (source 6 of 8)
    USDA, National Agricultural Statistics Service, 2012, 2012 Agricultural Census county-level boundary files populated, land area values in acres: USDA, National Agricultural Statistics Service, Washington, DC.

    Type_of_Source_Media: online
    Source_Scale_Denominator: 20000000
    Source_Contribution: attribute information

    CoUSAKHIPR_AEA12 (source 7 of 8)
    USDA, National Agricultural Statistics Service, 2013, 2012 Agricultural Census county-level boundary files extracted and projected for US, AK, HI, PR: USDA, National Agricultural Statistics Service, Washington, DC.

    Type_of_Source_Media: online
    Source_Scale_Denominator: 20000000
    Source_Contribution: spatial and attribute information

    CoUSAKHIPR_GCS12 (source 8 of 8)
    USDA, National Agricultural Statistics Service, 2013, Final unprojected 2012 Agricultural Census county-level boundary files for US, AK, HI, PR: USDA, National Agricultural Statistics Service, Washington, DC.

    Type_of_Source_Media: online
    Source_Scale_Denominator: 20000000
    Source_Contribution: spatial and attribute information

  2. How were the data generated, processed, and modified?

    Date: 2012 (process 1 of 7)
    1 - Procurement of spatial and attribute data. The original generalized projected county-level boundary data files and a separate county area-perimeter data file were obtained by special request from the U.S. Bureau of the Census, Geography Division. The spatial data file format is Environmental Systems Research Institute's (ESRI) ArcView shapefile format. The area data file format is dBase format.

    Data sources used in this process:

    • USCOBDY12
    • USCOAREA12

    Date: 2012 (process 2 of 7)
    2 - Modification of county-level codes. The county-level boundaries show geographic areas for which 2012 Agricultural Census statistics are reported. Certain individual counties were assigned the FIPS code of a designated adjacent or surrounding county. The following is a list of counties with modified boundaries. The Agricultural Census county codes and associated (=) U.S. county FIPS codes are identified below. 02010 = 02013, 02016, 02050, 02060, 02070, 02150, 02164, 02180, 02185, 02188, 02270. 02020 = 02020, 02170, 02261. 02090 = 02090, 02068, 02240, 02290. 02110 = 02100, 02105, 02110, 02130, 02195, 02198, 02201, 02220, 02230 02275, 02282. 15009 = 15009, 15005. 24033 = 24033, 11001. 24005 = 24005, 24510. 29189 = 29189, 29510. 51003 = 51003, 51540. 51005 = 51005, 51580. 51015 = 51015, 51790, 51820. 51019 = 51019, 51515. 51031 = 51031, 51680. 51041 = 51041, 51570. 51059 = 51059, 51510, 51600, 51610. 51069 = 51069, 51840. 51077 = 51077, 51640. 51081 = 51081, 51595. 51087 = 51087, 51760. 51089 = 51089, 51690. 51095 = 51095, 51830. 51121 = 51121, 51750. 51143 = 51143, 51590. 51149 = 51149, 51670, 51730. 51153 = 51153, 51683, 51685. 51161 = 51161, 51770, 51775. 51163 = 51163, 51530, 51678. 51165 = 51165, 51660. 51175 = 51175, 51620. 51177 = 51177, 51630. 51191 = 51191, 51520. 51195 = 51195, 51720. 51199 = 51199, 51650, 51700, 51735. 51550 = 51550, 51740. 51810 = 51810, 51710.

    Data sources used in this process:

    • USCOBDY12

    Data sources produced in this process:

    • USCOFIPSCONV

    Date: 2012 (process 3 of 7)
    3 - Population of land area. The county land area fields were populated with land area values from the county area-perimeter data file.

    Data sources used in this process:

    • USCOAREA12
    • USCOFIPSCONV

    Data sources produced in this process:

    • SQMIUSCO12

    Date: 2012 (process 4 of 7)
    4 - Creation of Agricultural Census counties and summation of land area. County boundaries were dissolved on the Agricultural Census county (FIPS) codes and county land area values (in square miles) were summed - this modified only the land area values for aggregated (dissolved) counties.

    Data sources used in this process:

    • SQMIUSCO12

    Data sources produced in this process:

    • SUMSQMIUSCO12

    Date: 2012 (process 5 of 7)
    5 - Modification and update of Agricultural Census county-level boundary file. The Agricultural Census county-level boundary files were modified to contain a field for county land area in acres. The county acreage fields were populated by multiplying the county land area in square miles by 640 (1 sq. mi. = 640 ac.).

    Data sources used in this process:

    • SUMSQMIUSCO12

    Data sources produced in this process:

    • ACREUSCO12

    Date: 2013 (process 6 of 7)
    6 - Extract and project Agricultural Census county-level boundary files for US, AK, HI, PR. Extracted Agricultural Census county-level boundary files to create separate shapefiles for the continental US, AK, HI, and PR. Reprojected shapefiles to custom Albers Equal Area projections.

    Data sources used in this process:

    • ACREUSCO12

    Data sources produced in this process:

    • CoUSAKHIPR_AEA12

    Date: 2013 (process 7 of 7)
    7 - Unproject Agricultural Census county-level boundary files. The Agricultural Census county-level boundary files for the continental US, AK, HI, and PR were (un)projected to Geographic Coordinate System (GCS), North American Datum of 1983 (NAD83).

    Data sources used in this process:

    • CoUSAKHIPR_AEA12

    Data sources produced in this process:

    • CoUSAKHIPR_GCS12


How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

    Unmodified entities have entity codes and names which conform to the American National Standards Institute, INCITS 31:200x, formerly Federal Information Processing Standard (FIPS) 6-4. Area values in square miles are derived from land polygon area values from the U.S. Census Bureau's TIGER database.

  2. How accurate are the geographic locations?

    The county-level boundary data are highly generalized and suitable for use in small scale (1:20,000,000) thematic mapping applications. No accuracy tests were performed.

  3. Where are the gaps in the data? What is missing?

    The generalized data do NOT include 1) boundaries for the Aleutian Islands in the Eastern Hemisphere, 2) boundaries for Hawaiian Islands west of -160.555771 degrees longitude, 3) very small polygons because of coordinate thinning, and 4) water polygons. This data set provides the land area in square miles and in acres for each county equivalent (or agricultural census area in Alaska). The land area values are based on the area of land polygons from the U.S. Census Bureau's TIGER database. If a county is composed of several polygons, the area value assigned to each polygon is the land area value of the entire county (for the purpose of choropleth mapping). Some of the county-level boundaries were modified to show geographic areas for which Agricultural Census statistics are reported. County Federal Information Processing (FIPS) codes for the modified counties were replaced by Agricultural Census county codes. States with modifications to their county boundaries and county codes are - Alaska, Hawaii, Maryland, Missouri, Virginia (and the District of Columbia).

  4. How consistent are the relationships among the observations, including topology?

    No topological checks were performed on the data.


How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: None
Use_Constraints:
None. Acknowledgment of the U.S. Department of Agriculture, National Agricultural Statistics Service would be appreciated in products derived from these data files.

  1. Who distributes the data set? (Distributor 1 of 1)

    USDA, NASS Customer service
    1400 Independence Avenue
    Washington, District of Columbia 20250
    USA

    1-800-727-9540 (voice)
    202-690-2090 (FAX)
    nass@nass.usda.gov

  2. What's the catalog number I need to order this data set?

    United States: 2012 Census of Agriculture downloadable county-level boundary files.

  3. What legal disclaimers am I supposed to read?

    Users of the Agricultural Census state-level boundary data are solely responsible for interpretations made from the product. The boundary data are provided "as is". USDA/NASS does not warrant results you may obtain by using the boundary data. Feel free to contact our staff at (HQ_RDD_OD_Staff@nass.usda.gov) if technical questions arise in the use of the state-level boundary data.

  4. How can I download or order the data?


Who wrote the metadata?

Dates:
Last modified: 27-Nov-2013
Metadata author:
USDA/NASS/RDD/GIB/SARS
3251 Old Lee Highway, Suite 305
Fairfax, VA 22030
USA

703-877-8000 (voice)
703-877-8044 (FAX)
HQ_RDD_OD_Staff@nass.usda.gov

Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)


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