cm_agchem

Metadata also available as

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 2004
Title: cm_agchem
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: Open-File Report
Issue_Identification: USGS OFR 2004-1032
Publication_Information:
Publication_Place: Rapid City, South Dakota
Publisher: U.S. Geological Survey
Online_Linkage: <http://pubs.water.usgs.gov/ofr2004-1032/>
Larger_Work_Citation:
Citation_Information:
Originator: W.A. Battaglin and D.A. Goolsby, U.S. Geological Survey
Publication_Date: 1994
Title:
Spatial data in GIS format on agricultural chemical use, land use, and cropping practices in the U.S.
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: Water-Resources Investigations Report
Issue_Identification: USGS WRIR 94-4176
Publication_Information:
Publication_Place: Lakewood, Colorado
Publisher: U.S. Geological Survey
Description:
Abstract:
This coverage contains estimates of agricultural-chemical use in Charles Mix County, South Dakota, as reported in the 1987 Census of Agriculture (U.S. Department of Commerce, 1989a). Agricultural-chemical use data are reported as either acres on which used, tons, or as a percentage of county area. Agricultural-chemical use estimates were generated from surveys of all farms where $1,000 or more of agricultural products were sold, or normally would have been sold, during the census year.

Most of the attributes summarized represent 1987 data, but some information from the 1982 Census of Agriculture also was included.

The polygons representing county boundaries in the conterminous United States, as well as lakes, estuaries, and other nonland-area features were derived from the Digital Line Graph (DLG) files representing the 1:2,000,000-scale map in the National Atlas of the United States (1970).

Purpose:
This coverage was prepared to assist the Yankton Sioux Tribe in developing a pesticide management plan.
Supplemental_Information:
Procedures_Used: CENSUS DATA

An automated procedure was developed for processing the raw census data into ARC/INFO coverage attributes. The procedure is summarized below: 1) copy county2m coverage to coverage representing type of census data (i.e. ag_expn or ag_land), 2) run agadd.aml for each item added to the coverage, giving coverage name and attribute field number as arguments.

The agadd.aml program runs a fortran program to extract field data from the raw census data files, and then processes that raw data finally adding it as a column of attribute data to the county coverage. Other programs were developed to calculate summary statistics of the census attribute data, and to make graphics representing attribute values across the United States.

COUNTY BOUNDARIES

This series of maps was published as part of the National Atlas of the United States (U.S.Geological Survey, 1970). The maps for the conterminous United States were digitized in 15 sheets and published in the Digital Line Graph (DLG) format as described by Domeratz and others (1983).

Each sheet was prepared by reading the DLG files of the political and water bodies layers, converting them to ARC/INFO, extracting the county boundaries and the coastline, respectively, and joining the two layers. FIPS codes were assigned to all polygons by using available sources and were checked manually.

Boundaries with adjacent sheets of the 15-sheet set were edgematched manually, arbitrarily choosing one of the sheets as the "correct" border. Edgematching operations adjusted the linework as far as was necessary so that the coverages would fit to a tolerance of 100 meters. The coverage (referred to herein as Version 1.0) was stored as 49 separate coverages (48 States and the District of Columbia) because the ARC/INFO software in use at the time could not process the entire coverage. Individual States could be joined by specifying a tolerance of 100 meters.

From time to time, adjustments were made to the State coverages to reflect changes in U.S. counties. It is believed the accuracy of these adjustments is comparable to the original linework.

For Version 2.0, all State coverages were rejoined and manually edited to produce a perfect edgematch between all States. For States on the original map sheet boundaries, this adjustment averaged less than 20 meters and in no case was more than 100 meters. The whole coverage was CLEANed to a tolerance of 20 meters, which resulted in few, if any, effects on small offshore islands. The coverage also was checked to ensure that it represented current U.S. counties or county equivalents.

The coverage in Version 1.0 stopped at the coastline. There was no attempt to depict offshore areas. This created some problems when the coverage was used to assign county codes to sampling stations located near the coast. To help in this matter, Version 2.0 includes offshore extensions of the county polygons. The (water) boundaries of many of these polygons are arbitrary.

The Canadian Great Lakes features are another new addition to Version 2.0. They were added to improve the utility of the coverage for visual displays. Although the Canadian Great Lakes are logically represented by a single polygon, practical considerations -- the inability of some software to plot polygons with a large number of vertices -- made it necessary to separate them into four polygons. The dividing lines are located in narrow channels to minimize interference with plotting patterns. Canadian islands within the Great Lakes also were included.

All ticks were relocated to places that are easily visible on maps of the United States, to help in registering maps that may not otherwise have adequate registration information.

To expedite accessing parts of the coverage, certain items have been indexed with the procedure, INDEX_COUNTY.AML. See Section 3 above. A spatial index also was created.

When using this coverage to clip or intersect other coverages, a tolerance as low as 2 meters can be used.

The processing used to derive this coverage moved boundaries from their positions on the original maps. In cases of conflicting lines, preference was given to forming the correct topology. Strictly speaking, this coverage is not identical to the source materials. These changes were unavoidable in producing a continuous coverage of the conterminous United States.

Revisions: Process_Step Process_Description COUNTY POLYGON DATA

Revision 1.0, 12/17/90. This revision represents numerous corrections and minor modifications made to this set of coverages from its construction in 1985 through the revision date. Process_Date 12/17/90 Process_Step Process_Description Revision 2.0, 3/18/91. Major reworking of the coverage, combining all State coverages. Process_Date 3/18/91

Reviews_Applied_to_Data: The Census of Agriculture data processing procedure and attribute data have been peer reviewed in 1993 by Leonard Orzol and Barbara Ruddy, both hydrologist with the USGS.

The county boundaries in this coverage have received no formal review. They have, however, been used in numerous applications where serious errors would have been obvious. Some State coverages were corrected following such use. The offshore polygon extensions and the Canadian Great Lakes polygons have had no review.

Related_Spatial_and_Tabular_Data_Sets: This coverage is part of series of 1:2,000,000-scale base maps covering the United States. Layers in this set include:

COUNTY -- County boundaries. STATE -- State boundaries (formed from COUNTY). WATERBOD -- Water Bodies. STREAM -- Streams. HUC -- Hydrologic cataloging units (basins).

Other_References_Cited: Domeratz, M. A., Hallam, C. A., Schmidt, W. E., and Calkins, H. W., 1983, USGS Digital Cartographic Data Standards: Digital Line Graphs from 1:2,000,000-scale Maps. U.S. Geological Survey Circular 895-D, 38p.

Nebert, Douglas D., 1994, Design of the distributed spatial data library for the Water Resources Division, U. S. Geological Survey: U. S. Geological Survey Open-File Report, 94-327, 30 p.

U.S. Department of Commerce, 1989a, Census of agriculture, 1987 -- Final county file: U.S. Department of Commerce, Bureau of the Census, [machine-readable data file]

U.S. Department of Commerce, 1989b, Census of agriculture, 1987 -- Final county file technical documentation: U.S. Department of Commerce, Bureau of the Census, Data User Services Division.

U.S. Department of Commerce, 1990, Census of agriculture, 1987 -- Agricultural atlas of the United States, volume 2: U.S. Department of Commerce, Bureau of the Census, Agriculture Division, AC87-S-1, 210 p.

U.S. Geological Survey, 1970, National atlas of the United States of America: Washington D.C., U. S. Geological Survey, 417 p.

Notes: DOCUMENTATION

The documentation for this coverage was generated by using the ARC macro language (AML) program document.aml available from the U.S. Geological Survey (Nebert, 1994).

Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1987
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -99.304802
East_Bounding_Coordinate: -98.071965
North_Bounding_Coordinate: 43.503577
South_Bounding_Coordinate: 42.843775
Keywords:
Theme:
Theme_Keyword:
Agricultural chemical use in Charles Mix County from 1987 Census of Agriculture
Place:
Place_Keyword: Charles Mix County
Stratum:
Temporal:
Access_Constraints: None.
Use_Constraints:
CENSUS DATA

Estimates of agricultural-chemical use by county were reported by the U.S. Department of Commerce (1989a, 1898b) in the 1987 Census of Agriculture. The estimates were constructed from surveys of all farms where $1,000 or more of agricultural products were sold, or normally would have been sold, during the census year. Sampling and statistics were used to account for nonresponding farm operations. Thus, the information in the Census of Agriculture is subject to sampling variability as well as reporting and coverage errors.

Census disclosure rules prevent publication of information that would disclose the operation of individual farms. Thus, for example, one or two sod farms may be reported in a county, but no acreage of sod harvested is reported, because release of that information might disclose information about a particular farmer's operation.

COUNTY BOUNDARIES

The original files for this map were provided in 15 sections. Boundaries near the edges of sections have been adjusted in edgematching.

Polygons that extend into the water (an ocean or the Great Lakes) should be considered arbitrary.

Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Bryan Schaap
Contact_Position: Hydrologist
Contact_Address:
Address_Type: mailing and physical address
Address: 111 Kansas Ave SE
City: Huron
State_or_Province: South Dakota
Postal_Code: 57350
Country: USA
Contact_Voice_Telephone: 605-352-4241
Contact_Facsimile_Telephone: 605-352-4304
Contact_Electronic_Mail_Address: bdschaap@usgs.gov
Hours_of_Service:
Security_Information:
Security_Classification_System: None
Security_Classification: Unclassified
Security_Handling_Description: None
Native_Data_Set_Environment:
Microsoft Windows 2000 Version 5.1 (Build 2600) Service Pack 1; ESRI ArcCatalog 8.3.0.800

Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report: See Entity_Attribute_Information
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: See Explanation
Attribute_Accuracy_Explanation:
Attribute accuracy is described, where present, with each attribute defined in the Entity and Attribute Section.
Logical_Consistency_Report: Polygon and chain-node topology present.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
(An explanation of the accuracy of the horizontal coordinate measurements and a description of tests used, if any, to determine horizontal positional accuracy. This is different from horizontal resolution as reported in the DOC file. Positional accuracy defines how correctly the digital features match real-world features and woiuld be related to the concept of the National Map Accuracy Standard -- xx% of well-defined point features fall within xx units of their true position. The resolution is the smallest unit of measure the GIS can reliably manage without truncation or rounding.)
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: approx. 1 km
Horizontal_Positional_Accuracy_Explanation: Resolution as reported
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
(The same as above, but for vertical information that may be encoded with the 2-D features such as cell or contour estimates of a vertical dimension. A description of the contour interval of input data and its basis could be described here.)
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator:
Publication_Date:
Source_Scale_Denominator: 2,000,000
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Process_Step:
Process_Description: RESELECT COUNTY2M COUNTY.NEW POLY
Source_Used_Citation_Abbreviation: None
Process_Date: 19911112
Process_Time: 1528
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: LABELERRORS COUNTY.NEW
Source_Used_Citation_Abbreviation: None
Process_Date: 19911112
Process_Time: 1529
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: LABELERRORS COUNTY.NEW
Source_Used_Citation_Abbreviation: None
Process_Date: 19911112
Process_Time: 1556
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: EXTERNALALL
Source_Used_Citation_Abbreviation: None
Process_Date: 19911112
Process_Time: 1721
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: RENAME COUNTY.NEW COUNTY2M
Source_Used_Citation_Abbreviation: None
Process_Date: 19911113
Process_Time: 1249
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: CREATELABELS COUNTY2M 5000
Source_Used_Citation_Abbreviation: None
Process_Date: 19911115
Process_Time: 1656
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: EXTERNALALL
Source_Used_Citation_Abbreviation: None
Process_Date: 19911204
Process_Time: 1410
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: COPY COUNTY2M /ARC3/WORK/LIB/COUNTY2M
Source_Used_Citation_Abbreviation: None
Process_Date: 19920102
Process_Time: 0833
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: COPY /ARC3/WORK/LIB/COUNTY2M COUNTY.AG
Source_Used_Citation_Abbreviation: None
Process_Date: 19920102
Process_Time: 1527
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: RENAME COUNTY.AG CNTY.AG
Source_Used_Citation_Abbreviation: None
Process_Date: 19920102
Process_Time: 1527
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: COPY /ARC3/WORK/CNTY.AG COUNTY2M
Source_Used_Citation_Abbreviation: None
Process_Date: 19920107
Process_Time: 1423
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: EXPORT COVER COUNTY2M COUNTY2M
Source_Used_Citation_Abbreviation: None
Process_Date: 19920117
Process_Time: 1350
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: COPY /ARC3/WORK/LIB/COUNTY2M COUNTY2M
Source_Used_Citation_Abbreviation: None
Process_Date: 19920121
Process_Time: 1549
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: BUILD COUNTY2M POLY
Source_Used_Citation_Abbreviation: None
Process_Date: 19920121
Process_Time: 1615
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: ARCEDIT /ARC3/WORK/COUNTY2M
Source_Used_Citation_Abbreviation: None
Process_Date: 19920122
Process_Time: 0948
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: BUILD COUNTY2M POLY
Source_Used_Citation_Abbreviation: None
Process_Date: 19920122
Process_Time: 0956
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: IDEDIT COUNTY2M POLY
Source_Used_Citation_Abbreviation: None
Process_Date: 19920122
Process_Time: 1101
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: COPY COUNTY2M /ARC3/WORK/LIB/COUNTY2M
Source_Used_Citation_Abbreviation: None
Process_Date: 19920122
Process_Time: 1102
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: IDEDIT COUNTY2M POLY
Source_Used_Citation_Abbreviation: None
Process_Date: 19920330
Process_Time: 1537
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: EXPORT COVER COUNTY2M COUNTY2M
Source_Used_Citation_Abbreviation: None
Process_Date: 19920608
Process_Time: 1103
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: ARCEDIT /ARC3/WORK/LIB/COUNTY2M
Source_Used_Citation_Abbreviation: None
Process_Date: 19920803
Process_Time: 1748
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: BUILD COUNTY2M POLY
Source_Used_Citation_Abbreviation: None
Process_Date: 19920803
Process_Time: 1758
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: CLEAN COUNTY2M # 2 2 POLY
Source_Used_Citation_Abbreviation: None
Process_Date: 19920803
Process_Time: 1846
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: COPY COUNTY2M /WB2/DB/USA/COUNTY2M
Source_Used_Citation_Abbreviation: None
Process_Date: 19920804
Process_Time: 0919
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: COPY /WB2/DB/USA/COUNTY2M AG_CHEM
Source_Used_Citation_Abbreviation: None
Process_Date: 19930104
Process_Time: 1648
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: DOCUMENT AG_CHEM DELETE WBATTAGL
Source_Used_Citation_Abbreviation: None
Process_Date: 19930329
Process_Time: 0947
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: DOCUMENT AG_CHEM UPDATE WBATTAGL
Source_Used_Citation_Abbreviation: None
Process_Date: 19930329
Process_Time: 1049
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: DOCUMENT AG_CHEM UPDATE WBATTAGL
Source_Used_Citation_Abbreviation: None
Process_Date: 19930329
Process_Time: 1118
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: DOCUMENT AG_CHEM UPDATE WBATTAGL
Source_Used_Citation_Abbreviation: None
Process_Date: 19930329
Process_Time: 1350
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: EXPORT COVER AG_CHEM AG_CHEM
Source_Used_Citation_Abbreviation: None
Process_Date: 19930330
Process_Time: 1041
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: COPY /ARC3/EPA1/CENSUS/AG_CHEM AG_CHEM
Source_Used_Citation_Abbreviation: None
Process_Date: 19941227
Process_Time: 1317
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: PROJECTDEFINE COVER AG_CHEM
Source_Used_Citation_Abbreviation: None
Process_Date: 19941227
Process_Time: 1318
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: DOCUMENT AG_CHEM UPDATE WBATTAGL
Source_Used_Citation_Abbreviation: None
Process_Date: 19941227
Process_Time: 1500
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: DOCUMENT AG_CHEM UPDATE WBATTAGL
Source_Used_Citation_Abbreviation: None
Process_Date: 19941230
Process_Time: 1125
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: MNEGRI IMPORT COVER AG_CHEM.E00 AG_CHEM
Source_Used_Citation_Abbreviation: None
Process_Date: 19950307
Process_Time: 1009
Source_Produced_Citation_Abbreviation: None
Process_Step:
Source_Used_Citation_Abbreviation: None
Process_Date: 19950307
Process_Time: 1022
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: MNEGRI EXPORT COVER AG_CHEM AG_CHEM.E00
Source_Used_Citation_Abbreviation: None
Process_Date: 19950309
Process_Time: 1510
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: MNEGRI EXPORT COVER AG_CHEM AG_CHEM.E00
Source_Used_Citation_Abbreviation: None
Process_Date: 19950309
Process_Time: 1524
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: MNEGRI ARCSDTS AG_CHEM AG_CHEM.TAR.GZ PREF
Source_Used_Citation_Abbreviation: None
Process_Date: 19950309
Process_Time: 1540
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description:
MNEGRI EXPORT COVER AG_CHEM /SCRATCH_AREA1/MNEGRI/AG_CHEM.E00 NONE
Source_Used_Citation_Abbreviation: None
Process_Date: 19950919
Process_Time: 1453
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: MNEGRI EXPORT COVER /DSDL1/CUSA/TILES/CUSA/AG_CHEM AG_CHEM.E00
Source_Used_Citation_Abbreviation: None
Process_Date: 19960624
Process_Time: 0814
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: MNEGRI EXPORT COVER /DSDL1/CUSA/TILES/CUSA/AG_CHEM AG_CHEM.E00
Source_Used_Citation_Abbreviation: None
Process_Date: 19960625
Process_Time: 1044
Source_Produced_Citation_Abbreviation: None
Process_Step:
Process_Description: Metadata imported.

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Complete chain
Point_and_Vector_Object_Count: 8
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Label point
Point_and_Vector_Object_Count: 1
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 1
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 197

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 14
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -99.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.000256
Ordinate_Resolution: 0.000256
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1927
Ellipsoid_Name: Clarke 1866
Semi-major_Axis: 6378206.400000
Denominator_of_Flattening_Ratio: 294.978698

Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: cm_agchem.aat
Entity_Type_Definition: Polygon attribute table
Entity_Type_Definition_Source: ARC/INFO file
Attribute:
Attribute_Label: FID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Positive real numbers
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Positive real numbers
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: FNODE#
Attribute_Definition: Internal node number for the beginning of an arc (from-node).
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Sequential unique positive integer
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Unrepresentable_Domain: Whole numbers that are automatically generated.
Attribute:
Attribute_Label: TNODE#
Attribute_Definition: Internal node number for the end of an arc (to-node).
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Integer
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Unrepresentable_Domain: Whole numbers that are automatically generated.
Attribute:
Attribute_Label: LPOLY#
Attribute_Definition: Internal node number for the left polygon.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 01001 - 56998, none = 0
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Unrepresentable_Domain: Whole numbers that are automatically generated.
Attribute:
Attribute_Label: RPOLY#
Attribute_Definition: Internal node number for the right polygon.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: AL - WY, none = blank
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Unrepresentable_Domain: Whole numbers that are automatically generated.
Attribute:
Attribute_Label: LENGTH
Attribute_Definition: Length of feature in internal units.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: upper-case alphanumeric, none = blank
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Unrepresentable_Domain: Positive real numbers that are automatically generated.
Attribute:
Attribute_Label: CM_AGCHEM#
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 0-4,9
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: CM_AGCHEM-ID
Attribute_Definition: User-defined feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: any integer
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: BNDTYPE
Attribute_Definition: total county land area (all polygons) in acres
Attribute_Definition_Source:
calculated from areas of polygons with like FIPS code and PLYTYPE=0
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99.000
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: CA0772
Attribute_Definition: Commercial fertilizer, 1987 (acres)
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: PCT0772
Attribute_Definition: Percent of county treated with commercial fertilizer, 1987
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99.000
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: CA0773
Attribute_Definition: Commercial fertilizer, 1982 (acres)
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: PCT0773
Attribute_Definition: Percent of county treated with commercial fertilizer, 1982
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99.000
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: CA0776
Attribute_Definition: Cropland fertilized, 1987 (acres)
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: PCT0776
Attribute_Definition: Percent of county as cropland fertilized, 1987
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99.000
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: CA0777
Attribute_Definition: Cropland fertilized, 1982 (acres)
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: PCT0777
Attribute_Definition: Percent of county as cropland fertilized, 1982
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99.000
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: CA0780
Attribute_Definition: Pastureland and rangeland fertilized, 1987 (acres)
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: PCT0780
Attribute_Definition: Percent of county as pastureland and rangeland fertilized, 1987
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99.000
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: CA0784
Attribute_Definition: Lime, 1987 (acres on which used)
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: PCT0784
Attribute_Definition: Percent of county treated with lime, 1987
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99.000
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: CA0786
Attribute_Definition: Lime, 1987 (tons)
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: CA0790
Attribute_Definition:
Chemicals used to control insects on hay and other crops, 1987 (acres)
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: PCT0790
Attribute_Definition:
Percent of county treated to control insects on hay and other crops, 1987
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99.000
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: CA0791
Attribute_Definition:
Chemicals used to control insects on hay and other crops, 1982 (acres)
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: PCT0791
Attribute_Definition:
Percent of county treated to control insects on hay and other crops, 1982
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99.000
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: CA0794
Attribute_Definition: Chemicals used to control nematodes in crops, 1987 (acres)
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: PCT0794
Attribute_Definition: Percent of county treated to control nematodes in crops, 1987
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99.000
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: CA0795
Attribute_Definition: Chemicals used to control nematodes in crops, 1982 (acres)
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: PCT0795
Attribute_Definition: Percent of county treated to control nematodes in crops, 1982
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99.000
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: CA0798
Attribute_Definition:
Chemicals used to control diseases in crops and orchards, 1987 (acres)
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: PCT0798
Attribute_Definition:
Percent of county treated to control diseases in crops and orchards, 1987
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99.000
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: CA0799
Attribute_Definition:
Chemicals used to control diseases in crops and orchards, 1982 (acres)
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: PCT0799
Attribute_Definition:
Percent of county treated to control diseases in crops and orchards, 1982
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99.000
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: CA0802
Attribute_Definition:
Chemicals used to control weeds or grasses in crops, 1987 (acres)
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: PCT0802
Attribute_Definition:
Percent of county treated to control weeds or grasses in crops, 1987
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99.000
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: CA0803
Attribute_Definition:
Chemicals used to control weeds or grasses in crops, 1982 (acres)
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: PCT0803
Attribute_Definition:
Percent of county treated to control weeds or grasses in crops, 1982
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99.000
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: CA0806
Attribute_Definition:
Chemicals used for defoliation or growth control in crops, 1987 (acres)
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: PCT0806
Attribute_Definition:
Percent of county treated for defoliation or growth control in crops, 1987
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99.000
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: CA0807
Attribute_Definition:
Chemicals used for defoliation or growth control in crops, 1982 (acres)
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: PCT0807
Attribute_Definition:
Percent of county treated for defoliation or growth control in crops, 1982
Attribute_Definition_Source: U.S. Department of Commerce, 1989a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: numeric values greater than 0, missing = -99.000
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: FIPSST
Attribute_Definition: two-digit state FIPS code
Attribute_Definition_Source: Federal Information Processing Standard
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 01 - 56, none = 0
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: FIPSCNTY
Attribute_Definition: three-digit county FIPS code
Attribute_Definition_Source: Federal Information Processing Standard
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 001 - 998, missing = 0
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Detailed_Description:
Entity_Type:
Entity_Type_Label: cm_agchem.pat
Entity_Type_Definition: Line attribute table
Entity_Type_Definition_Source: ARC/INFO file
Attribute:
Attribute_Label: FID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Sequential unique positive integer
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Sequential unique positive integer
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: AREA
Attribute_Definition: Area of feature in internal units squared.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Sequential unique positive integer
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Unrepresentable_Domain: Positive real numbers that are automatically generated.
Attribute:
Attribute_Label: PERIMETER
Attribute_Definition: Perimeter of feature in internal units.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Sequential unique positive integer
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Unrepresentable_Domain: Positive real numbers that are automatically generated.
Attribute:
Attribute_Label: CM_AGCHEM#
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Positive real numbers
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: CM_AGCHEM-ID
Attribute_Definition: User-defined feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Sequential unique positive integer
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: FIPS
Attribute_Definition: User-assigned feature number
Attribute_Definition_Source: User-defined
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Integer
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: ST
Attribute_Definition: boundary type
Attribute_Definition_Source: see narrative
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 0-8
Enumerated_Domain_Value_Definition:
Enumerated_Domain_Value_Definition_Source:
Attribute:
Attribute_Label: CNTYNAME
Attribute:
Attribute_Label: PLYTYPE
Attribute:
Attribute_Label: WORKB
Attribute:
Attribute_Label: AREA.ACRES
Attribute:
Attribute_Label: CA0772
Attribute:
Attribute_Label: PCT0772
Attribute:
Attribute_Label: CA0773
Attribute:
Attribute_Label: PCT0773
Attribute:
Attribute_Label: CA0776
Attribute:
Attribute_Label: PCT0776
Attribute:
Attribute_Label: CA0777
Attribute:
Attribute_Label: PCT0777
Attribute:
Attribute_Label: CA0780
Attribute:
Attribute_Label: PCT0780
Attribute:
Attribute_Label: CA0784
Attribute:
Attribute_Label: PCT0784
Attribute:
Attribute_Label: CA0786
Attribute:
Attribute_Label: CA0790
Attribute:
Attribute_Label: PCT0790
Attribute:
Attribute_Label: CA0791
Attribute:
Attribute_Label: PCT0791
Attribute:
Attribute_Label: CA0794
Attribute:
Attribute_Label: PCT0794
Attribute:
Attribute_Label: CA0795
Attribute:
Attribute_Label: PCT0795
Attribute:
Attribute_Label: CA0798
Attribute:
Attribute_Label: PCT0798
Attribute:
Attribute_Label: CA0799
Attribute:
Attribute_Label: PCT0799
Attribute:
Attribute_Label: CA0802
Attribute:
Attribute_Label: PCT0802
Attribute:
Attribute_Label: CA0803
Attribute:
Attribute_Label: PCT0803
Attribute:
Attribute_Label: CA0806
Attribute:
Attribute_Label: PCT0806
Attribute:
Attribute_Label: CA0807
Attribute:
Attribute_Label: PCT0807
Attribute:
Attribute_Label: FIPSST
Attribute:
Attribute_Label: FIPSCNTY
Overview_Description:
Entity_and_Attribute_Overview:
CENSUS ATTRIBUTES

All census attributes were extracted from tabular data files provided by the U.S. Department of Commerce (1989a). Data are reported in either thousands of dollars, number, acres, or percent of county. Attribute names are keyed to field names found in the technical documentation of the the Census of Agriculture (U.S. Department of Commerce, 1989b). Specifically, the four-digit number at the end of the ARC/INFO item name matches the field-name numbers in the technical-documentation reference. Complete definitions of attributes and terms used in the census can be found in U.S. Department of Commerce (1989b; 1990).

Thirty-three attributes from the 1987 Census of Agriculture were added to an ARC/INFO coverage of agricultural-chemical use estimates. The coverage name, attribute names, and short attribute descriptions are listed in table 1. Attribute names beginning with CA represent data fields transferred directly from the census tabular data files. Attribute names beginning with PCT are percent-of-county attributes, and represent relative intensities of an agricultural practice. Attributes reported as percent of county were calculated as the attribute value (in acres) divided by the county polygon area (in acres) multiplied by 100.

Table 1. 1987 Census of Agriculture agricultural-chemical use estimates coverage name, attribute names, and short attribute descriptions ___________________________________________________________________________

AG_CHEM--Coverage of agricultural-chemical use estimates from the 1987 Census of Agriculture ___________________________________________________________________________ Attribute name Description ___________________________________________________________________________ CA0772 Commercial fertilizer, 1987 (acres on which used) PCT0772 Percent of county treated with commercial fertilizer, 1987 CA0773 Commercial fertilizer, 1982 (acres on which used) PCT0773 Percent of county treated with commercial fertilizer, 1982 CA0776 Cropland fertilized, 1987 (acres on which used)

PCT0776 Percent of county as cropland fertilized, 1987 CA0777 Cropland fertilized, 1982 (acres on which used) PCT0777 Percent of county as cropland fertilized, 1982 CA0780 Pastureland and rangeland fertilized, 1987 (acres on which used) PCT0780 Percent of county as pastureland and rangeland fertilized, 1987

CA0784 Lime, 1987 (acres on which used) PCT078 Percent of county treated with lime, 1987 CA0786 Lime, 1987 (tons)

Sprays, dusts, granules, fumigants, and other compounds use to control --

CA0790 Insects on hay and other crops, 1987 (acres on which used) PCT0790 Percent of county treated for insects on hay and other crops, 1987 CA0791 Insects on hay and other crops, 1982 (acres on which used) PCT0791 Percent of county treated for insects on hay and other crops, 1982 CA0794 Nematodes in crops, 1987 (acres on which used)

PCT0794 Percent of county treated for nematodes in crops, 1987 CA0795 Nematodes in crops, 1982 (acres on which used) PCT0795 Percent of county treated for nematodes in crops, 1982 CA0798 Diseases in crops and orchards, 1987 (acres on which used) PCT0798 Percent of county treated for diseases in crops and orchards, 1987

CA0799 Diseases in crops and orchards, 1982 (acres on which used) PCT0799 Percent of county treated for diseases in crops and orchards, 1982 CA0802 Weeds, grass, or brush in crops and pasture, 1987 (acres on which used) PCT0802 Percent of county treated for weeds, grass, or brush in crops and pasture, 1987 CA0803 Weeds, grass, or brush in crops and pasture, 1982 (acres on which used)

PCT0803 Percent of county treated for weeds, grass, or brush in crops and pasture, 1982 CA0806 Chemicals used for defoliation or for growth control of crops or thinning of fruit, 1987 (acres on which use PCT0806 Percent of county treated with chemicals used for defoliation or for growth control of crops or thinning of fruit, 1987 CA0807 Chemicals used for defoliation or for growth control of crops or thinning of fruit, 1982 (acres on which use PCT0807 Percent of county treated with chemicals used for defoliation or for growth control of crops or thinning of fruit, 1982 _________________________________________________________________________

Census estimates for counties represented by one polygon are equal to county totals. For counties described by more than one polygon, attribute values are provided for each polygon and are calculated as the county total multiplied by the ratio of the area of each county polygon divided by the total area of the county.

A missing-value code of -99 is used when no census-attribute data are given for a county, and for all nonland-area polygons. A missing-value code in a county land polygon could indicate any of the following condition: --agricultural practice not present in county (for example, no corn grown in county) --data withheld because of census disclosure rules --data not available to census --data not published because county contains less than 10 farms --data not applicable

COUNTY POLYGON ATTRIBUTES

Each county is identified by a five-digit Federal Information Processing Standard (FIPS) code. The first two digits represent the state and the three remaining represent the county within State. County names (in upper case) and the two-character State abbreviation also are included.

All polygons are coded by polygon type (PLYTYPE) as follows: 0 = U.S. land. 1 = Extensions of counties into the ocean and estuaries. Some boundaries may be arbitrary. 2 = U.S. Great Lakes. Some boundaries between counties may be arbitrary. 3 = Canadian Great Lakes. 4 = Canadian islands in Great Lakes, included for visual cartographic purposes. 9 = External polygon.

All arcs are coded by boundary type (BNDTYPE) as follows: 0 = Coastline of United States. 1 = State-State border occurring on land. 2 = County-county border, within state, occurring on land. 3 = State-State border occurring on the ocean, an estuary, or a Great Lake. Some of these borders are arbitrary. 4 = County-county border, with State, but occurring on the ocean, an estuary, or a Great Lake. Some of these borders are arbitrary. 5 = International border occurring on land. 6 = International border occurring on water. 7 = Canadian shoreline of the Great Lakes. 8 = Arbitrary separation line between the Canadian portions of the Great Lakes. 9 = Closure line with the external polygon. This is arbitrary.

All BNDTYPE values are determined from the adjoining polygons by the routine, INDEX_COUNTY.AML. The coverage is indexed (ARC: INDEXITEM) on FIPS code, State FIPS code, State abbreviation, county name, polygon type, and boundary type.

Entity_and_Attribute_Detail_Citation: Not Available

Distribution_Information:
Resource_Description: Downloadable Data
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Transfer_Size: 0.071

Metadata_Reference_Information:
Metadata_Date: 20040312
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Bryan Schaap
Contact_Position: Hydrologist
Contact_Address:
Address_Type: mailing and physical address
Address: 111 Kansas Ave SE
City: Huron
State_or_Province: South Dakota
Postal_Code: 57350
Country: USA
Contact_Voice_Telephone: 605-352-4241
Contact_Facsimile_Telephone: 605-352-4304
Contact_Electronic_Mail_Address: bdschaap@usgs.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Security_Information:
Metadata_Security_Classification_System: None
Metadata_Security_Classification: Unclassified
Metadata_Security_Handling_Description: None
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile

Generated by mp version 2.7.33 on Fri Mar 12 14:14:45 2004