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2002 Census of Agriculture State Level Boundaries, (StGenAll_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 State Level Boundaries, (StGenAll_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 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 2002 Agricultural Census statistics are reported at the state level. These state 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 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 2002 Census of Agriculture, Volume 1, Geographic Area Series, Parts 1 - 51.

  1. How should this data set be cited?

United States Department of Agriculture, National Agricultural Statistics Service, 2004, 2002 Census of Agriculture State Level Boundaries, (StGenAll_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/StGenAll_D02.zip>

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 state level boundary files.

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

2002: Creation of state 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, 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.

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

      • G-Polygon (51)

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.

6.      How does the data set describe geographic features?

StGenAll_D02

State 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.

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

 

AGSTABBR

State abbreviation. (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

 

AGSTNMLC

Lowercase state equivalent name.(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

 

AGSTNMUC

Uppercase state equivalent name.(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

 

AGSTACRE

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

Range of values

Minimum:

668753.28 (actual value, not min. range value)

Maximum:

366048788.48 (actual value, not max. range value)

Units:

Acre

 

AGSTSQMI

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

Range of values

Minimum:

1044.927 (actual value, not min. range value)

Maximum:

571951.232 (actual value, not max. range value)

Units:

Square mile


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 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?

USCOBDY (source 1 of 9)

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

Type_of_Source_Media:on-line

Source_Scale_Denominator:20000000

Source_Contribution:spatial and attribute information

 

HICOBDY (source 2 of 9)

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

Online Links:

       

Type_of_Source_Media:online

Source_Scale_Denominator:5000000

Source_Contribution:spatial and attribute information

 

USCOAREA (source 3 of 9)

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:on-line

Source_Contribution: attribute information

 

USSTBDY (source 4 of 9)

USDA, National Agricultural Statistics Service, 2002,US state level boundary files: USDA, National Agricultural Statistics Service,Washington, DC.

Type_of_Source_Media:on-line

Source_Scale_Denominator:20000000

Source_Contribution:spatial and attribute information

 

MULTIUSSTBDY (source 5 of 9)

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

Type_of_Source_Media:on-line

Source_Scale_Denominator:20000000

Source_Contribution:spatial and attribute information

 

SQMIACREUSST (source 6 of 9)

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

Type_of_Source_Media:on-line

Source_Contribution:attribute information

 

AREAUSSTBDY (source 7 of 9)

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

Type_of_Source_Media:on-line

Source_Scale_Denominator:20000000

Source_Contribution:spatial and attribute information

 

ALLUSSTBDY (source 8 of 9)

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

Type_of_Source_Media:on-line

Source_Scale_Denominator:20000000

Source_Contribution:spatial and attribute information

 

StGenAll_D02 (source 9 of 9)

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

Type_of_Source_Media:on-line

Source_Scale_Denominator:20000000

Source_Contribution:spatial and attribute information

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

Date: 2001 (process 1 of 8)

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 (ESRI) ArcViewshapefile 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 8)

2 - Creation of state boundary files. State boundary files were created from county level boundary files by dissolving boundaries between counties which had the same state FIPS code. The District of Columbia was assigned Maryland's state FIPS code. The Maryland and D. C. state level boundaries were aggregated by dissolving boundaries between D. C. and Maryland which had the same state FIPS code.

Data sources used in this process:

Data sources produced in this process:

Date: 2001 (process 3 of 8)

3 - Creation of separate spatial files. The single state level boundary file was split into 4 state boundary files: Alaska, Puerto Rico, continental U.S., and Hawaii, (Hawaii's more detailed state boundary was used in place of Hawaii's generalized state 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 4 of 8)

4 - Modification of state level boundary file fields. A field was added to the boundary files and populated with the state names in upper case. A field was added to the boundary files and populated with the state abbreviations. 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.).

Data sources used in this process:

Data sources produced in this process:

Date: 2002 (process 5 of 8)

5 - Calculation of state land area. A state land area file was made from a copy of the area-perimeter file. A field was added to the state land area file to contain the state area in square miles and was populated by summing the county land area values (in square miles) for each state. The state land area values for Maryland and D.C. were added together. A field was added to the state land area file to contain the state acreage. The land area values (in acres) of states were calculated by multiplying the state land area (in square miles) by 640 (1 square mile contains 640 acres).

Data sources used in this process:

Data sources produced in this process:

Date: 2002 (process 6 of 8)

6 - Modification and update of state level boundary file. The Agricultural Census state boundary files were modified to contain fields for state area in square miles and acreage. The new area fields were populated with data from the state land area file.

Data sources used in this process:

Data sources produced in this process:

Date: 2003 (process 7 of 8)

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

Data sources used in this process:

Data sources produced in this process:

Date: 2003 (process 8 of 8)

8 - Modification of field names. Field names were modified and some fields were rearranged in the Agricultural Census state 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 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 -160.25 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 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 24represents 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)

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 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_RD_OD@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?

Data format:

ESRI Shapefile (.shp, .shx., .dbf, .sbn, .sbx, .prj) Size: .25

Network links:

<http://www.nass.usda.gov/census/census02/atlas02/StGenAll_D02.zip>

Media you can order:

CD_ROM (format ISO 9660)

o       Cost to order the data:

There is no charge for the on-line option. CD-Roms are 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 Federal holidays. Outside the U.S., please dial 1-703-605-6220. To order a CD-ROM on-line 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 Digital Geospatial Metadata (FGDC-STD-001-1998)