USDA logo 2002 Census of Agriculture
Maps and Cartographic Resources
NASS logo

Agricultural Atlas Maps | Star Tree Map Index | Cartographic Boundary Files

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 County Level Boundaries, (CoGenAll_D02.shp -.shx, -.dbf, -.sbn, -.sbx, -.prj)

Abstract:

The United States Department of Agriculture (USDA), National Agricultural Statistics Service (NASS) conducted an Agricultural Census in 2002. 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 2002 Agricultural Census statistics are reported at the county level. These county level boundary files were used in the production of the 2002 Census of Agriculture, Agricultural Atlas of the United States. The boundary files can be employed in a Geographic Information System (GIS) with the 2002 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 2002 Census of Agriculture, Volume 1, Geographic Area Series, Parts 1 - 50.

  1. How should this data set be cited?

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

Online Links:

o       <http://www.agcensus.usda.gov/Publications/2002/Ag_Atlas_Maps/>

2.      What geographic 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.      Does the data set describe conditions during a particular time period?

Calendar_Date: 2004

Currentness_Reference:

2004: Publication of Agricultural Census county level boundary files.

2003: Modification of Agricultural Census county level boundaries data fields.

2002: Modification of county level boundaries and recalculation of land area.

2001: Procurement of county level boundaries and area data files.

2000: County level boundary creation and calculation of area.

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?

a.    How are 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, and Associated 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 vector data types (SDTS terminology):

b.    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.

1.      How does the data set describe geographic features?

CoGenAll_D02

County level boundaries of geographic areas for which 2002 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.

AGSTCOID

Full Agricultural Census-state-county equivalent code. (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

 

AGCONMLC

Lowercase county equivalent (or agriculture area) name. (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

 

AGCONMUC

Uppercase county equivalent (or agriculture area) name. (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

 

AGCOACRE

Land area in acres of a county equivalent (or agriculture area). (Source: USDA, National Agricultural Statistics 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 a county equivalent (or agriculture area). (Source: USDA, National Agricultural Statistics 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 county equivalent 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.      Who also contributed to the data set?

Research and Development Division staff

3.      To whom 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 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?

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 of the 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 the Census, Geography Division, Upper Marlboro, MD.

Online Links:

o

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 of the 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 Agricultural Statistics 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, National Agricultural 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, National Agricultural 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, National Agricultural 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, National Agricultural 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 and attribute data. The original generalized unprojected 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. Hawaii's county boundary files (scale 1:5000000) were downloaded from the U.S. Census Bureau's Cartographic Boundary Files web site.

Data sources used in this process:

Date: 2001 (process 2 of 7)

2 - Creation of separate spatial files. The single original generalized county level boundary file was split into 4 county boundary files: Alaska, Puerto Rico, continental U.S., and Hawaii, (Hawaii's more detailed county boundary was used in place of Hawaii's generalized county boundary. Islands west of -160.25 degrees longitude were deleted).

Data sources used in this process:

Data sources produced in this process:

Date: 2002 (process 3 of 7)

3 - Modification of county level boundaries and codes. A field was added to the boundary files and populated with the combined state and county Federal Information Processing (FIPS) codes. A field was added to the boundary files and populated with the county names in upper case. The Area field of the boundary files contained erroneous values, so zeros replaced the area values. Several unnecessary fields of the boundary files were deleted (Perimeter, etc.). County 12086 had its FIPS code changed to 12025. Some of the original county level boundaries were modified to show geographic areas for which 2002 agricultural census statistics are reported. Certain individual counties were assigned the FIPS code of a designated adjacent or surrounding county. Counties were aggregated by dissolving boundaries between counties which had the same county FIPS code. 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 = 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. The land area values (in square miles) of aggregated counties in the area perimeter file were calculated by summing the land area values of the aggregated counties (see above list of aggregated counties). A field was added to the area-perimeter file to contain the county acreage. The land area values (in acres) of aggregated counties were calculated by multiplying the land area (in square miles) of the aggregated counties by 640 (1 square mile contains 640 acres).

Data sources used in this process:

Data sources produced in this process:

Date: 2002 (process 5 of 7)

5 - Modification and update of county level boundary file. The Agricultural Census county boundary files were modified to contain fields for county area in square miles and acreage. The new area 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 spatial file. The separate Agricultural Census county level boundary files for Alaska, Hawaii, Puerto Rico and the continental U.S. were merged into a single Agricultural 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 Agricultural Census 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 names which conform to the Federal Information Processing Standard 6-4, except Miami-Dade County, Florida which has a county code of 025 rather than the county FIPS code of 086. 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 -160.25 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 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)

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 of Agriculture, State and County Data, Volume 1 (Full Set on CD-ROM), or downloadable county level boundary files.

3.      What legal disclaimers am I supposed to read?

Users of the Agricultural Census county-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_RD_OD@nass.usda.gov) if technical questions arise in the use of the county level boundary data.

4.      How can I download or order the data?

Data format:

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

Network links:

<http://www.agcensus.usda.gov/Publications/2002/Ag_Atlas_Maps/mapfiles/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-ROMs are available for sale through the National Technical Information Service.

o       Special instructions:

For information or to order a CD-ROM dial 1-800-999-6779 from 8:30 a.m. - 5:00 p.m. ET, Monday - Friday except on Federal holidays. Outside the U.S., please dial 1-703-605-6220.


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 Digital Geospatial Metadata (FGDC-STD-001-1998)