2012 Census of Agriculture State-Level Boundaries, (StUS_GCS12.shp -.shx, -.dbf, -.sbn, -.sbx, -.prj, StAK_GCS12.shp -.shx, -.dbf, -.sbn, -.sbx, -.prj, StHI_GCS12.shp -.shx, -.dbf, -.sbn, -.sbx, -.prj, StPR_GCS12.shp -.shx, -.dbf, -.sbn, -.sbx, -.prj)

Frequently-anticipated questions:


What does this data set describe?

Title:
2012 Census of Agriculture State-Level Boundaries, (StUS_GCS12.shp -.shx, -.dbf, -.sbn, -.sbx, -.prj, StAK_GCS12.shp -.shx, -.dbf, -.sbn, -.sbx, -.prj, StHI_GCS12.shp -.shx, -.dbf, -.sbn, -.sbx, -.prj, StPR_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 state, county, and U.S. levels and are available in a digital format. The Research and Development Division of NASS modified generalized state boundaries to show geographic areas for which the 2012 Agricultural Census statistics are reported at the state level. These state-level boundary files were used in the production of the 2012 Census of Agriculture, Agricultural Atlas 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 state codes to associate the state-level spatial entities with the state-level statistical data.
Supplemental_Information:
These Agricultural Census state-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 State-Level Boundaries, (StUS_GCS12.shp -.shx, -.dbf, -.sbn, -.sbx, -.prj, StAK_GCS12.shp -.shx, -.dbf, -.sbn, -.sbx, -.prj, StHI_GCS12.shp -.shx, -.dbf, -.sbn, -.sbx, -.prj, StPR_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 state-level boundaries and land areas. 2012-2013: Production of state-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:
      U.S. Department of Commerce, 1987, Codes for the Identification of the States, the District of Columbia and the Outlying Areas of The United States, and Associated Areas (Federal Information Processing Standard 5-2): Washington, D.C., National Institute of Standards and Technology. <https://www.nist.gov/itl/popular-links/federal-information-processing-standards-fips>
      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • G-Polygon (51)

    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?

    StUS_GCS12/StAK_GCS12/StHI_GCS12/StPR_GCS12
    State-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_ST
    State equivalent FIPS code. (Source: USDA, National Agricultural Statistics Service)

    ATLAS_ST
    Formal codeset
    Codeset Name:U.S. Department of Commerce, 1987, Codes for the Identification of the States, the District of Columbia and the Outlying Areas of The United States, and Associated Areas (Federal Information Processing Standard 5-2): Washington, D.C., National Institute of Standards and Technology.
    Codeset Source:U.S. Bureau of the Census

    ST_ABBREV
    State equivalent abbreviation. (Source: USDA, National Agricultural Statistics Service)

    ST_ABBREV
    Formal codeset
    Codeset Name:U.S. Department of Commerce, 1987, Codes for the Identification of the States, the District of Columbia and the Outlying Areas of The United States, and Associated Areas (Federal Information Processing Standard 5-2): Washington, D.C., National Institute of Standards and Technology.
    Codeset Source:U.S. Bureau of the Census

    ATLAS_NAME
    Lowercase state equivalent name. (Source: USDA, National Agricultural Statistics Service)

    ATLAS_NAME
    Formal codeset
    Codeset Name:U.S. Department of Commerce, 1987, Codes for the Identification of the States, the District of Columbia and the Outlying Areas of The United States, and Associated Areas (Federal Information Processing Standard 5-2): Washington, D.C., National Institute of Standards and Technology.
    Codeset Source:U.S. Bureau of the Census

    ATLAS_CAPS
    Uppercase state equivalent name. (Source: USDA, National Agricultural Statistics Service)

    ATLAS_CAPS
    Formal codeset
    Codeset Name:U.S. Department of Commerce, 1987, Codes for the Identification of the States, the District of Columbia and the Outlying Areas of The United States, and Associated Areas (Federal Information Processing Standard 5-2): 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 state equivalent. (Source: USDA, National Agricultural Statistics Service)

    ATLAS_AREA
    Range of values
    Minimum:1033.79218 (actual value, not min. range value)
    Maximum:571895.5526 (actual value, not max. range value)
    Units:Square mile

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

    ATLAS_ACRE
    Range of values
    Minimum:661626.99264 (actual value, not min. range value)
    Maximum:366013153.664 (actual value, not max. range value)
    Units:Acre

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

    ENTITY
    ValueDefinition
    State, State EquivalentType of state-level entity.


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 state 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 state-level boundaries are provided "as is". The USDA/NASS does not warrant the results you may obtain using the Agricultural Census state-level boundary data.


How was the data set created?

  1. From what previous works were the data drawn?

    SUMSQMIUSCO12 (source 1 of 5)
    USDA, National Agricultural Statistics Service, 2012, Source for 2012 Agricultural Census state-level boundary file: USDA, National Agricultural Statistics Service, Washington, DC.

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

    SQMIUSST12 (source 2 of 5)
    USDA, National Agricultural Statistics Service, 2012, 2012 Agricultural Census state-level boundary file created with land area in square miles: USDA, National Agricultural Statistics Service, Washington, DC.

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

    ACREUSST12 (source 3 of 5)
    USDA, National Agricultural Statistics Service, 2013, 2012 Agricultural Census state-level boundary files attributed and land acreage calculated: USDA, National Agricultural Statistics Service, Washington, DC.

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

    StUSAKHIPR_AEA12 (source 4 of 5)
    USDA, National Agricultural Statistics Service, 2013, 2012 Agricultural Census state-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

    StUSAKHIPR_GCS12 (source 5 of 5)
    USDA, National Agricultural Statistics Service, 2013, Final unprojected 2012 Agricultural Census state-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 5)
    1 - Obtain source file to create 2012 Agricultural Census state-level boundary file. The aggregated (dissolved) 2012 Agricultural Census county-level boundary file was created by a separate process and is the source file for the 2012 Agricultural Census state-level boundary file (see metadata for 2012 Agricultural Census county-level boundary file).

    Data sources used in this process:

    • SUMSQMIUSCO12

    Date: 2012 (process 2 of 5)
    2 - Creation of Agricultural Census state-level boundary file. State boundaries were aggregated (dissolved) on the Agricultural Census state (FIPS) codes. County land area values were summed to produce state land area values in square miles.

    Data sources used in this process:

    • SUMSQMIUSCO12

    Data sources produced in this process:

    • SQMIUSST12

    Date: 2012 (process 3 of 5)
    3 - Update of state-level boundary file. The 2012 Agricultural Census state boundary files were updated with 2012 attribute values. The state acreage fields were populated by multiplying the state land area in square miles by 640 (1 sq. mi. = 640 ac.).

    Data sources used in this process:

    • SQMIUSST12

    Data sources produced in this process:

    • ACREUSST12

    Date: 2013 (process 4 of 5)
    4 - Extract and project Agricultural Census state-level boundary files for US, AK, HI, PR. Extracted Agricultural Census state-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:

    • ACREUSST12

    Data sources produced in this process:

    • StUSAKHIPR_AEA12

    Date: 2013 (process 5 of 5)
    5 - Unproject Agricultural Census state-level boundary files. The Agricultural Census state-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:

    • StUSAKHIPR_AEA12

    Data sources produced in this process:

    • StUSAKHIPR_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 Federal Information Processing Standard 5-2. 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 state-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 number of acres for each state equivalent. The land area values are based on the area of land polygons from the U.S. Census Bureau's TIGER database. If a state is composed of several polygons, the area value assigned to each polygon is the land area value of the entire state (for the purpose of choropleth mapping). The state-level boundary for Maryland was modified to include the District of Columbia (D.C.), because Agricultural Census data for D.C. are not reported separately. State-level Federal Information Processing (FIPS) codes are used to identify states. Because Maryland and D.C. state boundaries were aggregated, Maryland's FIPS code 24 represents Maryland (24) and D.C. (11).

  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 state-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)


Generated by mp version 2.9.2 on Thu Jul 09 11:59:19 2015