Battaglin, W.A., and Goolsby, D.A.
1994
Estimates of herbicide use for the 20 most-used herbicides in the conterminous United States
1.0
Series_Name WRIR-94
Issue_Identification 4176
Lakewood, CO
USGS
http://water.usgs.gov/lookup/getspatial?herbicide1
Battaglin, W. A.; Goolsby, D. A.
1995
Spatial data in geographic information system format on agricultural chemical use, land use, cropping practices in the United States
report
U.S. Geological Survey Water Resources Investigative Report
WRIR 944176
Reston, VA
U.S. Geological Survey
http://pubs.er.usgs.gov/publication/wri944176
This coverage contains estimates of herbicide use for the 20 most-used
herbicides in the conterminous United States as reported in Gianessi
and Puffer (1991). Herbicide-use estimates in this coverage are reported
for each county polygon as acres treated, pounds of active ingredient
used, and pounds used per square mile.
The herbicide-use estimates provided by Gianessi and Puffer (1991) list
acres treated and pounds of active ingredient applied for a given crop
in each county for which use has been estimated. Cropping data are from the
1987 Census of Agriculture, and are subject to occasional suppressions of
acreage estimates at the county level due to problems of confidentiality
and census disclosure rules. The herbicide-use estimates included in
this coverage are totals of use on all crops treated in a given county.
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).
Herbicides
Herbicide use
Counties
United States
The herbicide-use estimates in this coverage are intended for use as
a means for estimating regional herbicide use, and for producing
maps showing relative rates of herbicide use across broad regions of
the United States.
Procedures_Used:
HERBICIDE-USE DATA
An automated procedure was developed to process the raw herbicide-use
data into ARC/INFO coverage attributes. The procedure is summarized below:
(1) copy county2m coverage to coverage called herbicide%#%, and
(2) run the AML herbadd.aml for each herbicide to be added.
The herbadd.aml program runs a fortran program to total estimates of
herbicide use on all crops by county, then processes these data, finally
adding them as three columns of attribute data to the county coverage.
Other programs were developed to calculate summary statistics of the
herbicide-attribute data and to produce maps that show 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; one of the sheets was chosen arbitrarily as the "correct"
border. Egematching operations were used to adjust the linework as far as
was necessary so that the coverages would fit to a tolerance of 100 meters
(328.1 feet). 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 counties. The accuracy of these adjustments is believed
to be comparable to that of 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 (65.6 feet), which resulted in few, if
any, effects on small offshore islands. The coverage also was checked to
ensure that it represented current counties or county equivalents.
The coverage in Version 1.0 ended at the coastline. No attempt was made
to depict offshore areas. This created 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 represented logically 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 tick marks were relocated to places that are easily visible on maps
of the United States, to help in registering maps that otherwise may not
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 this coverage is used to clip or intersect other coverages, a
tolerance as low as 2 meters (6.6 feet) 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:
COUNTY POLYGON DATA
Revision 1.0, 12/17/90. This revision represents many
corrections and minor modifications made to this set of coverages
from its construction in 1985 through the revision date.
Revision 2.0, 3/18/91. Major reworking of the coverage, combining
all State coverages.
Reviews_Applied_to_Data:
The herbicide-use data-processing procedure and attribute data have been
peer reviewed in 1993 by Leonard Orzol and Barbara Ruddy, U.S. Geological
Survey hydrologists.
The herbicide-use estimates prepared by Gianessi and Puffer (1991) were
compared with National estimates provided by the Office of Pesticide
Programs of the U.S. Environmental Protection Agency, and were reviewed by
more than 20 individuals from the companies that registered the chemicals.
The county boundaries in this coverage were not reviewed formally. 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 not been reviewed.
Related_Spatial_and_Tabular_Data_Sets:
This coverage is part of series of 1:2,000,000-scale base maps that cover
the United States. Also available are:
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, 38 p.
Gianessi, Leonard P. and Puffer, Cynthia, 1991, Herbicide
use in the United States: Washington, D.C., Resources for the Future,
December 1990 (revised April 1991), 128 p.
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. 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).
Unknown
(Here you put information defining how the time period of
content information, on the DOC file, was determined)
(Here you pick one of the following entries that describes
how often changes or additions are made to the data set.
Pick one, and delete the rest)
Continually
Daily
Weekly
Monthly
Annually
Unknown
As Needed
Irregular
None planned
-128.07002717
-65.25698378
48.26194027
22.67774911
None
Herbicide use estimates for counties in the United States
inlandWaters
None
Conterminous United States
None
None
None
None
(describe any restrictions or legal prerequisites for accessing
the data set. Put "None" if there are no restrictions)
HERBICIDE-USE DATA
Estimates of herbicide use by county were generated by Gianessi
and Puffer (1991) by using the following procedure:
(1) collect statistics by State, by crop, on percentage of acres treated
with a given herbicide, and average annual application rate of the
herbicide from surveys sent to Extension Service weed scientists in
1987 and 1989;
(2) augment survey data with published information from some States;
(3) establish herbicide-use profiles, by State, by crop, containing the
percentage of acres treated, and average annual application rates;
(4) apply data in herbicide-use profiles to county-level crop-acreage
estimates from the 1987 Census of Agriculture (U.S. Department of
Commerce, 1989a); and
(5) tabulate pounds of active ingredient of herbicides used by crop, by
county.
Eighty-four crops were profiled, resulting in usage estimates for 96
herbicide active ingredients. This coverage contains estimates of use
for the 20 most-used herbicides in the conterminous United States.
Although crop-acreage data represent the 1987 growing year, the
herbicide-use estimates generally reflect 1989 usage amounts
(Gianessi and Puffer, 1991).
Estimates of herbicide use by county were generated from a combination
of data collected from surveys of weed scientists and from surveys of
farmers. Herbicide-use profile data were generated from ancillary data
sources or were calculated from profiles in neighboring states when
no responses to surveys or published reports were available (Gianessi and
Puffer, 1991). Sampling and statistics were used to account for
nonresponding farm operations. Thus, the information describing crop
acreages is subject to sampling variability as well as reporting and
coverage errors (U.S. Department of Commerce, 1989b). Census disclosure
rules also prevent the publication of information that would disclose
the operation of individual farms.
Before herbicide-use estimates entered into this coverage, the total
use of individual herbicides on all crops for each county was calculated.
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.
William A. Battaglin
U.S. Geological Survey, Water Resources Div. (WRD)
Hydrologist, Office of the Regional Hydrologist
mailing address
P.O. Box 25046, Denver Federal Center, Bldg. 25
Lakewood
CO
80225
USA
1-888-275-8747
303-236-5959
wbattagl@usgs.gov
8:00am-4:30pm MST
Please contact thru email
http://water.usgs.gov/GIS/browse/herbicide1.gif
Illlustration of data set
GIF
(Here you acknowledge the agencies and organizations that gave
you money, resources, and encouragement to digitize the data and
to enter all this wonderful metadata.)
None
Unclassified
None
dgux, 5.4R3.10, AViiON UNIX, ARC/INFO version 7.0.4
See Entity_Attribute_Information
See Explanation
Attribute accuracy is described, where present, with each
attribute defined in the Entity and Attribute Section.
Polygon and chain-node topology present.
(Information in wordy narrative form describing omissions,
selection criteria, generalization, definitions used, and other
rules applied to derive the data set)
(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.)
approximately 1 km
Resolution as reported
(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.)
2,000,000
RESELECT COUNTY2M COUNTY.NEW POLY
None
19911112
1528
None
LABELERRORS COUNTY.NEW
None
19911112
1529
None
LABELERRORS COUNTY.NEW
None
19911112
1556
None
EXTERNALALL
None
19911112
1721
None
RENAME COUNTY.NEW COUNTY2M
None
19911113
1249
None
CREATELABELS COUNTY2M 5000
None
19911115
1656
None
EXTERNALALL
None
19911204
1410
None
COPY COUNTY2M /ARC3/WORK/LIB/COUNTY2M
None
19920102
0833
None
COPY /ARC3/WORK/LIB/COUNTY2M COUNTY.AG
None
19920102
1527
None
RENAME COUNTY.AG CNTY.AG
None
19920102
1527
None
COPY /ARC3/WORK/CNTY.AG COUNTY2M
None
19920107
1423
None
EXPORT COVER COUNTY2M COUNTY2M
None
19920117
1350
None
COPY /ARC3/WORK/LIB/COUNTY2M COUNTY2M
None
19920121
1549
None
BUILD COUNTY2M POLY
None
19920121
1615
None
ARCEDIT /ARC3/WORK/COUNTY2M
None
19920122
0948
None
BUILD COUNTY2M POLY
None
19920122
0956
None
IDEDIT COUNTY2M POLY
None
19920122
1101
None
COPY COUNTY2M /ARC3/WORK/LIB/COUNTY2M
None
19920122
1102
None
IDEDIT COUNTY2M POLY
None
19920330
1537
None
EXPORT COVER COUNTY2M COUNTY2M
None
19920608
1103
None
ARCEDIT /ARC3/WORK/LIB/COUNTY2M
None
19920803
1748
None
BUILD COUNTY2M POLY
None
19920803
1758
None
CLEAN COUNTY2M # 2 2 POLY
None
19920803
1846
None
COPY COUNTY2M /WB2/DB/USA/COUNTY2M
None
19920804
0919
None
COPY /WB2/DB/USA/COUNTY2M HERBICIDE1
None
19921228
1541
None
DOCUMENT HERBICIDE1 UPDATE WBATTAGL
None
19930330
1650
None
DOCUMENT HERBICIDE1 UPDATE WBATTAGL
None
19930331
1154
None
DOCUMENT HERBICIDE1 UPDATE WBATTAGL
None
19930331
1317
None
DOCUMENT HERBICIDE1 UPDATE WBATTAGL
None
19930403
1149
None
EXPORT COVER HERBICIDE1 HERBICIDE1
None
19930413
1634
None
COPY HERBICIDE1 /AG/WORK/HERBICIDE1
None
19940718
1206
None
DOCUMENT HERBICIDE1 UPDATE WBATTAGL
None
19940726
1422
None
PROJECTDEFINE COVER HERBICIDE1
None
19940726
1427
None
DOCUMENT HERBICIDE1 UPDATE WBATTAGL
None
19940726
1637
None
DOCUMENT HERBICIDE1 UPDATE WBATTAGL
None
19940727
1023
None
COPY /AG/WORK/HERBICIDE1 HERBICIDE1
None
19940818
0902
None
EXPORT COVER HERBICIDE1 HERBICIDE1
None
19940818
0907
None
COPY /ARC3/EPA1/RFF/HERBICIDE1 HERBICIDE1
None
19941215
0906
None
DOCUMENT HERBICIDE1 UPDATE WBATTAGL
None
19941215
1141
None
DOCUMENT HERBICIDE1 UPDATE WBATTAGL
None
19941215
1422
None
DOCUMENT HERBICIDE1 UPDATE WBATTAGL
None
19941215
1447
None
DOCUMENT HERBICIDE1 UPDATE WBATTAGL
None
19941216
1627
None
EXPORT COVER HERBICIDE1 HERBICIDE1
None
19941219
0858
None
DOCUMENT HERBICIDE1 UPDATE WBATTAGL
None
19941230
1002
None
MNEGRI IMPORT COVER HERBICIDE1.E00 HERBICIDE1
None
19950308
1225
None
None
19950308
1238
None
MNEGRI EXPORT COVER HERBICIDE1 HERBICIDE1.E00
None
19950309
1725
None
MNEGRI ARCSDTS HERBICIDE1 HERBICIDE1.TAR.GZ PREF
None
19950309
1743
None
MNEGRI EXPORT COVER HERBICIDE1 /SCRATCH_AREA1/MNEGRI/HERBICIDE1.E00 NONE
None
19950919
1633
None
MNEGRI EXPORT COVER /DSDL1/CUSA/TILES/CUSA/HERBICIDE1 HERBICIDE1.E00
None
19960624
0841
None
MNEGRI EXPORT COVER /DSDL1/CUSA/TILES/CUSA/HERBICIDE1 HERBICIDE1.E00
None
19960625
1111
None
Vector
Point
4787
String
11926
GT-polygon composed of chains
4788
Albers Conical Equal Area
29.5
45.5
-96
23
0.0
0.0
coordinate pair
1.0
1.0
METERS
Unknown
Clarke 1866
6378206.4
294.98
HERBICIDE1.PAT
Polygon attribute table
ARC/INFO file
AREA
Area of polygon in square coverage units (meters)
Computed
Positive real numbers
PERIMETER
Perimeter of polygon in coverage units (meters)
Computed
Positive real numbers
HERBICIDE1#
Internal feature number
Computed
Sequential unique positive integer
HERBICIDE1-ID
User-assigned feature number
User-defined
Integer
FIPS
5-digit County FIPS code
Federal Information Processing Standard
01001 - 56998, none = 0
ST
two-character state abbreviation
U.S. Postal Service
AL - WY, none = blank
CNTYNAME
County name
U.S. Geological Survey files
upper-case alphanumeric, none = blank
PLYTYPE
polygon type: 0=county land, others are lakes, estuaries, etc.
see narrative
0-4,9
WORKB
variable used for data processing
n/a
any integer
AREA.ACRES
total county land area (all polygons) in acres
calculated from area of polygons with like FIPS code and PLYTYPE=0
numeric values greater than 0, missing = -99.000
H1980.ACR
Acres treated with atrazine
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1980.LBS
pounds of atrazine used
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1980.USE
rate of atrazine use in county polygon in pounds per square mile
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.000
H1863.ACR
acres treated with alachlor
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1863.LBS
pounds of alachlor used
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1863.USE
rate of alachlor use in county polygon in pounds per square mile
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.000
H1011.ACR
acres treated with metolachlor
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1011.LBS
pounds of metolachlor used
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1011.USE
rate of metolachlor use in county polygon in pounds per square mile
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.000
H1414.ACR
acres treated with EPTC
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1414.LBS
pounds of EPTC used
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1414.USE
rate of EPTC use in county polygon in pounds per square mile
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.000
H1302.ACR
acres treated with 2,4-D
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1302.LBS
pounds of 2,4-D used
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1302.USE
rate of 2,4-D use in county polygon in pounds per square mile
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.000
H1361.ACR
acres treated with trifluralin
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1361.LBS
pounds of trifluralin used
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1361.USE
rate of trifluralin use in county polygon in pounds per square mile
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.000
H1369.ACR
acres treated with cyanazine
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1369.LBS
pounds of cyanazine used
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1369.USE
rate of cyanazine use in county polygon in pounds per square mile
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.000
H1839.ACR
acres treated with butylate
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1839.LBS
pounds of butylate used
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1839.USE
rate of butylate use in county polygon in pounds per square mile
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.000
H1629.ACR
acres treated with pendimethalin
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1629.LBS
pounds of pendimethalin used
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1629.USE
rate of pendimethalin use in county polygon in pounds per square mile
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.000
H1099.ACR
acres treated with glyphosate
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1099.LBS
pounds of glyphosate used
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1099.USE
rate of glyphosate use in county polygon in pounds per square mile
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.000
H1298.ACR
acres treated with dicamba
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1298.LBS
pounds of dicamba used
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1298.USE
rate of dicamba use in county polygon in pounds per square mile
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.000
H1287.ACR
acres treated with bentazon
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1287.LBS
pounds of bentazon used
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1287.USE
rate of bentazon use in county polygon in pounds per square mile
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.000
H1282.ACR
acres treated with propanil
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1282.LBS
pounds of propanil used
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1282.USE
rate of propanil use in county polygon in pounds per square mile
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.000
H1124.ACR
acres treated with MSMA
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1124.LBS
pounds of MSMA used
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1124.USE
rate of MSMA use in county polygon in pounds per square mile
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.000
H1975.ACR
acres treated with metribuzin
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1975.LBS
pounds of metribuzin used
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1975.USE
rate of metribuzin use in county polygon in pounds per square mile
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.000
H1417.ACR
acres treated with molinate
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1417.LBS
pounds of molinate used
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1417.USE
rate of molinate use in county polygon in pounds per square mile
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.000
H1305.ACR
acres treated with MCPA
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1305.LBS
pounds of MCPA used
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1305.USE
rate of MCPA use in county polygon in pounds per square mile
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.000
H1979.ACR
acres treated with propazine
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1979.LBS
pounds of propazine used
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1979.USE
rate of propazine use in county polygons in pounds per square mile
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.000
H1191.ACR
acres treated with propachlor
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1191.LBS
pounds of propachlor use
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1191.USE
rate of propachlor use in county polygons pounds per square mile
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.000
H1981.ACR
acres treated with simazine
Gianessi and Puffer, 1991
numeric values greater than 0, missing = -99.0
H1981.LBS
pounds of simazine used
Gianessi and Puffer, 1990
numeric values greater than 0, missing = -99.0
H1981.USE
rate of simazine use in county polygon (pounds per square mile)
Gianessi and Puffer, 1990
numeric values greater than 0, missing = -99.000
FIPSST
two-digit state FIPS code
Federal Information Processing Standard
01 - 56, none = 0
FIPSCNTY
three-digit county FIPS code
Federal Information Processing Standard
001 - 998, none = 0
HERBICIDE1.AAT
Line attribute table
ARC/INFO file
FNODE#
Internal number of from-node
Computed
Sequential unique positive integer
TNODE#
Internal number of to-node
Computed
Sequential unique positive integer
LPOLY#
Internal number of polygon to left of arc
Computed
Sequential unique positive integer
RPOLY#
Internal number of polygon to right of arc
Computed
Sequential unique positive integer
LENGTH
Length of arc in coverage units
Computed
Positive real numbers
HERBICIDE1#
Internal feature number
Computed
Sequential unique positive integer
HERBICIDE1-ID
User-assigned feature number
User-defined
Integer
BNDTYPE
boundary type
see narrative
0-8
HERBICIDE-USE ATTRIBUTES
Herbicide-use attributes are from tabular data files provided by
Gianessi and Puffer (1991). Three attributes are added to an ARC/INFO
coverage for each of the 96 herbicides. Attributes with names ending
in .ACR are estimates of the number of acres treated with a given
herbicide. Attributes with names ending in .LBS are estimates of the
number of pounds of active ingredient applied of a given herbicide.
Attributes ending in .USE are estimates of a county-level herbicide-use
rate in pounds per square mile.
Attribute names are keyed to four-digit herbicide code numbers provided
in the table below. A ranking of national herbicide-use amounts (Gianessi
and Puffer, 1991) was used to divide herbicide-use data into five
coverages (herbicide1, herbicide2, herbicide3, herbicide4, and herbicide5)
Table 1. Herbicide codes for herbicide1 coverage
Code Herbicide
_______________________
1980 Atrazine
1863 Alachlor
1011 Metolachlor
1414 EPTC
1302 2,4-D
1361 Trifluralin
1369 Cyanazine
1839 Butylate
1629 Pendimethalin
1099 Glyphosate
1298 Dicamba
1287 Bentazon
1282 Propanil
1124 MSMA
1975 Metribuzin
1417 Molinate
1305 MCPA
1979 Propazine
1191 Propachlor
1981 Simazine
______________________
Herbicide-use estimates in 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 total area of the county.
A missing-value code of -99.0 is used when no herbicide-attribute data
are given for a county and for all nonland-area polygons. The
missing-value code can indicate any of the following conditions:
-- herbicide use not present in county (for example, no atrazine used
in county)
-- crop data withheld because of census disclosure rules
-- crop data not available to the census
-- crop data not published because county contains fewer than 10 farms.
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 the 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 located on land.
2 = County-county border, within State, located on land.
3 = State-State border located on the ocean, an estuary, or a
Great Lake. Some of these borders are arbitrary.
4 = County-county border, with State, but located on an ocean, an
estuary, or Great Lake. Some of these borders are arbitrary.
5 = International border located on land.
6 = International border located 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.
Not Available
U.S. Geological Survey
Ask USGS - Water Webserver Team
mailing
445 National Center
Reston
VA
20192
1-888-275-8747 (1-888-ASK-USGS)
http://water.usgs.gov/user_feedback_form.html
Although this data set has been used by the U.S. Geological
Survey, U.S. Department of the Interior, no warranty expressed or
implied is made by the U.S. Geological Survey as to the accuracy
of the data and related materials. The act of distribution shall not
constitute any such warranty, and no responsibility is assumed by
the U.S. Geological Survey in the use of this data, software, or
related materials.
Any use of trade, product, or firm names is for descriptive
purposes only and does not imply endorsement by the U.S.
Government.
Export
Full coverage
zipped
1
http://water.usgs.gov/GIS/dsdl/herbicide1.e00.gz
SDTS
Full coverage
zipped
1
http://water.usgs.gov/GIS/dsdl/herbicide1.sdts.tgz
None. This dataset is provided by USGS as a public service.
20041108
U.S. Geological Survey
Ask USGS -- Water Webserver Team
mailing
445 National Center
Reston
VA
20192
1-888-275-8747 (1-888-ASK-USGS)
http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+herbicide1
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998