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2002 Census of Agriculture County Level Boundaries, (CoGenAll_D02.shp-.shx, -.dbf, -.sbn, -.sbx, -.prj)

Metadata also available as - [Parseabletext]

Frequently-anticipated questions:


What does this data set describe?

Title:

2002 Census of Agriculture CountyLevel Boundaries, (CoGenAll_D02.shp -.shx, -.dbf, -.sbn, -.sbx, -.prj)

Abstract:

The United States Department ofAgriculture (USDA), National Agricultural Statistics Service (NASS) conductedan Agricultural Census in 2002. The statistical census data are summarized atthe county, state, and U.S. levels and are available in a digital format. TheResearch and Development Division of NASS modified generalized countyboundaries to show geographic areas for which the 2002 Agricultural Censusstatistics are reported at the county level. These county level boundary fileswere used in the production of the 2002 Census of Agriculture, AgriculturalAtlas of the United States. The boundary files can be employed in a GeographicInformation System (GIS) with the 2002 Agricultural Census statistical data byusing the Agricultural Census county codes to associate the county levelspatial entities with the county level statistical data.

Supplemental_Information:

These Agricultural Census countylevel boundary files may be used with statistical data in the 2002 Census ofAgriculture, Volume 1, Geographic Area Series, Parts 1 - 50.

  1. How should this data set be cited?

United States Department of Agriculture, NationalAgricultural Statistics Service, 2004, 2002 Census of Agriculture County LevelBoundaries, (CoGenAll_D02.shp -.shx, -.dbf, -.sbn, -.sbx, -.prj): U.S.Department of Agriculture, National Agricultural Statistics Service, Fairfax,Virginia.

Online Links:

o       <http://www.nass.usda.gov/census/census02/atlas02/CoGenAll_D02.zip>

2.      Whatgeographic area does the data set cover?

West_Bounding_Coordinate:-178.873024

East_Bounding_Coordinate:-65.244424

North_Bounding_Coordinate:71.352561

South_Bounding_Coordinate:17.945846

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

Calendar_Date: 2004

Currentness_Reference:

2004: Publication of AgriculturalCensus county level boundary files.

2003: Modification of AgriculturalCensus county level boundaries data fields.

2002: Modification of county levelboundaries and recalculation of land area.

2001: Procurement of county levelboundaries and area data files.

2000: County level boundarycreation and calculation of area.

4.      Whatis the general form of this data set?

Geospatial_Data_Presentation_Form:vector digital data

5.      Howdoes the data set represent geographic features?

a.    Howare geographic features stored in the data set?

Indirect_Spatial_Reference:

U.S. Department of Commerce, 1990,Counties and Equivalent Entities of The United States, Its Possessions, andAssociated Areas (Federal Information Processing Standard 6-4): Washington,D.C. National Institute of Standards and Technology.

This is a Vector data set. It contains the following vectordata types (SDTS terminology):

b.    Whatcoordinate 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 arespecified in Decimal Degrees.

The horizontal datum used is North American Datumof 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.

1.      Howdoes the data set describe geographic features?

CoGenAll_D02

County level boundaries ofgeographic areas for which 2002 Agricultural Census statistics are reported.(Source: USDA, National Agricultural Statistics Service.)

 

FID

Internal feature identificationnumber. (Source: ESRI)

Sequential unique whole numbers automaticallygenerated.

SHAPE

Feature geometry. (Source: ESRI)

Coordinates defining the features.

AGSTCOID

Full Agricultural Censusstate-county equivalent code. (Source: USDA, National Agricultural StatisticsService)

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

 

AGCONMLC

Lowercase county equivalent (oragriculture area) name. (Source: USDA, National Agricultural StatisticsService)

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

 

AGCONMUC

Uppercase county equivalent (oragriculture area) name. (Source: USDA, National Agricultural StatisticsService)

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

 

AGCOACRE

Land area in acres of a countyequivalent (or agriculture area). (Source: USDA, National AgriculturalStatistics Service)

Range of values

Minimum:

3088 (actual value, not min. range value)

Maximum:

170527730.56 (actual value, not max. range value)

Units:

Acre

 

AGCOSQMI

Land area in square miles of acounty equivalent (or agriculture area). (Source: USDA, National AgriculturalStatistics Service)

Range of values

Minimum:

4.825 (actual value, not min. range value)

Maximum:

266449.579 (actual value, not max. range value)

Units:

Square mile

 

AGSTID

State equivalent FIPS code.(Source: USDA, National Agricultural Statistics Service)

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

 

AGCOID

Agricultural Census countyequivalent codes (Source: USDA, National Agricultural Statistics Service)

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.      Whoalso contributed to the data set?

Research and Development Division staff

3.      Towhom should users address questions about the data?

Geographic Information Branch staff
USDA/NASS/RDD/GIB
3251 Old Lee Highway, Suite 301
Fairfax, VA 22030

703-235-1971 (voice)
703-235-3386 (FAX)
HQ_RD_OD@nass.usda.gov


Why was the data set created?

The boundaries are intended for geographic display andanalysis at the county level. The boundary data are designed for small scale thematicmapping 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". TheUSDA/NASS does not warrant the results you may obtain using the AgriculturalCensus county level boundary data.


How was the data set created?

  1. From what previous works were the data drawn?

USCOBDY (source 1 of 10)

U.S. Bureau of the Census, Geography Division, 2000,st99co_g.shp, -.shx, -.dbf (Generalized digital vector files): U.S. Bureau ofthe Census, Geography Division, Upper Marlboro, MD.

Type_of_Source_Media:online

Source_Scale_Denominator:20000000

Source_Contribution:spatial and attribute information

 

HICOBDY (source 2 of 10)

U.S. Bureau of the Census, Geography Division, 2000,co15_d02.shp, -.shx, -.dbf (Hawaii's digital vector files): U.S. Bureau of theCensus, Geography Division, Upper Marlboro, MD.

Online Links:

o       <http://www.census.gov/geo/www/cob/co2000.html>

Type_of_Source_Media: online

Source_Scale_Denominator:5000000

Source_Contribution:spatial and attribute information

 

USCOAREA (source 3 of 10)

U.S. Bureau of the Census, Geography Division, 2000,area_perimeter_data.dbf (U.S. county land area, perimeter data): U.S. Bureau ofthe Census, Geography Division, Upper Marlboro, MD.

Type_of_Source_Media:online

Source_Contribution:attribute information

 

USCOFIPSCONV (source 4 of10)

USDA, National Agricultural Statistics Service, 2001,U.S. county FIPS codes conversion to Agricultural Census county codes: USDA,National Agricultural Statistics Service, Washington, DC.

Type_of_Source_Media:paper

Source_Contribution:attribute information

 

MULTIUSCOBDY (source 5 of10)

USDA, National Agricultural Statistics Service, 2002,Separated (AK, HI, PR, continental US) county level boundary files: USDA,National Agricultural Statistics Service, Washington, DC.

Type_of_Source_Media:online

Source_Scale_Denominator:20000000

Source_Contribution:spatial and attribute information

 

AGUSCOBDY (source 6 of 10)

USDA, National Agricultural Statistics Service, 2002,Agricultural Census county level boundary files: USDA, National AgriculturalStatistics Service, Washington, DC.

Type_of_Source_Media:online

Source_Scale_Denominator:20000000

Source_Contribution:spatial and attribute information

 

SQMIACREUSCO (source 7 of10)

USDA, National Agricultural Statistics Service, 2002,Recalculated Agricultural Census county level land area values: USDA, NationalAgricultural Statistics Service, Washington, DC.

Type_of_Source_Media:online

Source_Contribution:attribute information

 

AREAUSCOBDY (source 8 of 10)

USDA, National Agricultural Statistics Service, 2002,Agricultural Census county level boundary files with updated land areas: USDA, NationalAgricultural Statistics Service, Washington, DC.

Type_of_Source_Media:online

Source_Scale_Denominator:20000000

Source_Contribution:spatial and attribute information

 

ALLUSCOBDY (source 9 of 10)

USDA, National Agricultural Statistics Service, 2002,Single file of all Agricultural Census county level boundaries: USDA, NationalAgricultural Statistics Service, Washington, DC.

Type_of_Source_Media:online

Source_Scale_Denominator:20000000

Source_Contribution:spatial and attribute information

 

CoGenAll_D02 (source 10 of10)

USDA, National Agricultural Statistics Service, 2003,Finalized file of Agricultural Census county level boundaries: USDA, NationalAgricultural Statistics Service, Washington, DC.

Type_of_Source_Media:online

Source_Scale_Denominator:20000000

Source_Contribution:spatial and attribute information

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

Date: 2001 (process 1 of 7)

1 - Procurement of spatial andattribute data. The original generalized unprojected county level boundary datafiles and a separate county area-perimeter data file were obtained by specialrequest from the U.S. Bureau of the Census, Geography Division. The spatialdata file format is Environmental Systems Research Institute's (ESRI) ArcViewshapefile format. The area data file format is dBASE. Hawaii's county boundaryfiles (scale 1:5000000) were downloaded from the U.S. Census Bureau'sCartographic Boundary Files web site.

Data sources used in this process:

Date: 2001 (process 2 of 7)

2 - Creation of separate spatialfiles. The single original generalized county level boundary file was splitinto 4 county boundary files: Alaska, Puerto Rico, continental U.S., andHawaii, (Hawaii's more detailed county boundary was used in place of Hawaii'sgeneralized county boundary. Islands west of -160.25 degrees longitude weredeleted).

Data sources used in this process:

Data sources produced in this process:

Date: 2002 (process 3 of 7)

3 - Modification of county levelboundaries and codes. A field was added to the boundary files and populatedwith the combined state and county Federal Information Processing (FIPS) codes.A field was added to the boundary files and populated with the county names inupper case. The Area field of the boundary files contained erroneous values, sozeros replaced the area values. Several unnecessary fields of the boundaryfiles were deleted (Perimeter, etc.). County 12086 had its FIPS code changed to12025. Some of the original county level boundaries were modified to showgeographic areas for which 2002 agricultural census statistics are reported.Certain individual counties were assigned the FIPS code of a designatedadjacent or surrounding county. Counties were aggregated by dissolvingboundaries between counties which had the same county FIPS code. The followingis a list of counties with modified boundaries. The Agricultural Census countycodes and associated (=) U.S. county FIPS codes are identified below.

02010 = 02010, 02013, 02016, 02050,02060, 02070, 02150, 02164, 02180, 02185, 02188.

02020 = 02020, 02170, 02261.

02090 = 02090, 02068, 02240, 02290.

02110 = 02110, 02100, 02130, 02201,02220, 02232, 02280, 02282.

15009 = 15009, 15005.

24033 = 24033, 11001.

24005 = 24005, 24510.

29189 = 29189, 29510.

51003 = 51003, 51540.

51005 = 51005, 51560, 51580.

51015 = 51015, 51790, 51820.

51019 = 51059, 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:

Data sources produced in this process:

Date: 2002 (process 4 of 7)

4 - Calculation of land area. Theland area values (in square miles) of aggregated counties in the area-perimeterfile were calculated by summing the land area values of the aggregated counties(see above list of aggregated counties). A field was added to thearea-perimeter file to contain the county acreage. The land area values (inacres) of aggregated counties were calculated by multiplying the land area (insquare miles) of the aggregated counties by 640 (1 square mile contains 640acres).

Data sources used in this process:

Data sources produced in this process:

Date: 2002 (process 5 of 7)

5 - Modification and update ofcounty level boundary file. The Agricultural Census county boundary files weremodified to contain fields for county area in square miles and acreage. The newarea fields were populated with data from the area-perimeter file.

Data sources used in this process:

Data sources produced in this process:

Date: 2003 (process 6 of 7)

6 - Creation of single spatialfile. The separate Agricultural Census county level boundary files for Alaska,Hawaii, Puerto Rico and the continental U.S. were merged into a singleAgricultural Census county level boundary file.

Data sources used in this process:

Data sources produced in this process:

Date: 2003 (process 7 of 7)

7 - Modification of field names.Field names were modified and some fields were rearranged in the AgriculturalCensus county level boundary file.

Data sources used in this process:

Data sources produced in this process:


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

  1. How well have the observations been checked?

Unmodified entities have entity codes and nameswhich conform to the Federal Information Processing Standard 6-4, except Miami-DadeCounty, Florida which has a county code of 025 rather than the county FIPS codeof 086. Area values in square miles are derived from land polygon area valuesfrom the U.S. Census Bureau's TIGER database.

2.      Howaccurate are the geographic locations?

The county level boundary data are highlygeneralized and suitable for use in small scale (1:20,000,000) thematic mappingapplications. No accuracy tests were performed.

3.      Whereare the gaps in the data? What is missing?

The generalized data do NOT include 1) boundariesfor the Aleutian Islands in the Eastern Hemisphere, 2) boundaries for HawaiianIslands west of -160.25 degrees longitude, 3) very small polygons because ofcoordinate thinning, and 4) water polygons. This data set provides the landarea in square miles and number of acres for each county equivalent (oragricultural census area in Alaska). The land area values are based on the areaof land polygons from the U.S. Census Bureau's TIGER database. If a county iscomposed of several polygons, the area value assigned to each polygon is theland area value of the entire county (for the purpose of choropleth mapping).Some of the county level boundaries were modified to show geographic areas forwhich Agricultural Census statistics are reported. County Federal InformationProcessing (FIPS) codes for the modified counties were replaced by AgriculturalCensus county codes. States with modifications to their county boundaries andcounty codes are - Alaska, Hawaii, Maryland, Missouri, Virginia (and the Districtof Columbia).

4.      Howconsistent 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 onaccess or use of the data?

Access_Constraints: None

Use_Constraints:

None. Acknowledgment of the U.S.Department of Agriculture, National Agricultural Statistics Service would beappreciated in products derived from these data files.

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

NASS
5285 Port Royal Road
Springfield, Virginia 22161
USA

1-800-999-6779 (voice)
703-605-6900 (FAX)
helpdesk@ntis.gov

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

AC02-CD-VOL1, United States: 2002 Census ofAgriculture, State and County Data, Volume 1 (Full Set on CD-ROM), ordownloadable county level boundary files.

3.      Whatlegal disclaimers am I supposed to read?

Users of the Agricultural Census county-level boundarydata are solely responsible for interpretations made from the product. Theboundary data are provided "as is". USDA/NASS does not warrantresults you may obtain by using the boundary data. Feel free to contact ourstaff at (HQ_RD_OD@nass.usda.gov) if technical questions arise in the use ofthe county level boundary data.

4.      Howcan I download or order the data?

Data format:

ESRI Shapefile (.shp, .shx., .dbf, .sbn, .sbx, .prj) Size: 1.15

Network links:

<http://www.nass.usda.gov/census/census02/atlas02/CoGenAll_D02.zip>

Media you can order:

CD_ROM (format ISO 9660)

o       Cost to order the data:

There is no charge for the online option. CD-ROMsare available for sale through the National Technical Information Service.

o       Special instructions:

For information or to order a CD-ROM dial1-800-999-6779 from 8:30 a.m. - 5:00 p.m. ET, Monday - Friday except on Federalholidays. Outside the U.S., please dial 1-703-605-6220. To order a CD-ROMonline visit <http://www.usda.gov/nass/pubs/catalog.htm#order>


Who wrote the metadata?

Dates:

Last modified: 03-Jun-2004

 

Metadata author:

USDA/NASS/RDD/GIB
3251 Old Lee Highway, Suite 301
Fairfax, VA 22030
USA

703-235-1971 (voice)
703-235-3386 (FAX)
HQ_RD_OD@nass.usda.gov

Metadata standard:

FGDC Content Standards for DigitalGeospatial Metadata (FGDC-STD-001-1998)