FLORIDA GEOGRAPHIC DATA LIBRARY DOCUMENTATION
VERSION 2004

TITLE: NITROGEN FERTILIZER SALES FOR THE COUNTIES OF FLORIDA

Geodataset Name:      NFER90
Geodataset Type:      COVER
Geodataset Feature:   POLYGON

GENERAL DESCRIPTION:

This shapefile contains estimates of nitrogen-fertilizer sales for the state 
of Florida in 1990 as reported by the U.S. Environmental Protection Agency 
(1990) and by Jerald Fletcher (West Virginia University, written commun., 1992). 
Nitrogen-fertilizer sales estimates in this coverage are reported for each county 
polygon in tons of actual nutrient sold (inorganic nitrogen, phosphate, and potash) 
as distinct from total tons of fertilizer product. 
DATA SOURCE(S):                   U.S. GeologicaL Survey, Water Resources Div. (WRD)
SCALE OF ORIGINAL SOURCE MAPS:    1:2,000,000
DATE OF AUTOMATION OR SOURCE:     1994    
GEODATASET EXTENT:                State of Florida
 

FEATURE ATTRIBUTE TABLES:

Datafile Name: NFER90.DBF

NAME           LENGTH    TYPE         PRECISION
SHAPE            8       SHAPEPOLY        0      
AREA             4       DECIMAL          0
PERIMETER        4       DECIMAL          0
FIPS             4       DECIMAL          0
ST               2       CHARACTER        0
CNTYNAME         23      CHARACTER        0
PLYTYPE          4       DECIMAL          0
AREA_ACRES       4       DECIMAL          0
NTOT90           4       DECIMAL          0
NTOT90_USE       4       DECIMAL          0
K2O90            4       DECIMAL          0
K2O90_USE        4       DECIMAL          0
P2O590           4       DECIMAL          0
P2O590_USE       4       DECIMAL          0
AMNI90           4       DECIMAL          0
ANHY90           4       DECIMAL          0
NMIS90           4       DECIMAL          0
NSOL90           4       DECIMAL          0
UREA90           4       DECIMAL          0
DESCRIPT         50      CHARACTER 	  -
 

FEATURE ATTRIBUTE TABLES CODES AND VALUES:

ITEM	           ITEM DESCRIPTION
SHAPE             Data attribute inherent to the ESRI shapefile format,
                  which defines the data as a point, polyline, or polygon.
                     
AREA              Area of polygon in square coverage units (square meters)
 
PERIMETER         Perimeter of polygon in coverage units (meters 
FIPS              5-digit County Federal Information Processing Standard code
ST                Two-character state abbreviation 

CNTYNAME          County name 

PLYTYPE           0 = county land, others are lakes, estuaries, etc.
 
AREA_ACRES        Total county land area (all polygons) in acres
 
NTOT90            Total estimated nitrogen-fertilizer sales in tons, 1990
                  numeric values greater than 0, missing = -99
                    
NTOT90_USE        Rate of nitrogen-fertilizer use in county polygon in tons  per   
                  square mile, numeric values greater than 0, missing = -99
                     
K2O90             Estimated potash (K2O) sales in tons, 1990
                  numeric values greater than 0, missing = -99
                    
K2O90_USE         Rate of potash use in county polygon in tons per square mile
                  numeric values greater than 0, missing = -99
                    
P2O590            Estimated phosphate (P2O5) sales in tons, 1990
                  numeric values greater than 0, missing = -99
                    
P2O590_USE        Rate of phosphate use in county polygon in tons per square mile
                  numeric values greater than 0, missing = -99
                   
AMNI90            Fertilizer sold as ammonium nitrate in tons, 1990 
                  numeric values greater than 0, missing = -99
                   
ANHY90            Fertilizer sold as anhydrous ammonia in tons, 1990
                  numeric values greater than 0, missing = -99
                   
NMIS90            Fertilizer sold as anhydrous ammonia in tons, 1990
                  numeric values greater than 0, missing = -99
                    
NSOL90            Fertilizer sold as nitrogen solutions in tons, 1990
                  numeric values greater than 0, missing = -99
                    
UREA90            Fertilizer sold as urea in tons, 1990
                  numeric values greater than 0, missing = -99
                   
FIPSST            Two-digit state Federal Information Processing Standard code

FIPSCNTY          Three-digit county Federal Information Processing Standard code
DESCRIPT          FGDL added item based on CNTYNAME
 

USER NOTES:

The data are summarized for fertilizer years (i.e. the 1987 fertilizer year runs 
from July 1, 1986 to June 30, 1987). 

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) file representing the 1:2,000,000-scale map in the 
National Atlas of the United States (1970). 

The nitrogen-fertilizer sales estimates in this coverage are intended for use in 
estimating regional fertilizer sales, and in producing visual displays and mapping 
relative rates of fertilizer sales across broad regions of the United States.
A note concerning scale:
Scale is an important factor in data usage.  Certain scale datasets are not
suitable for some project, analysis, or modelling purposes.  Please be sure you
are using the best available data.
1:24000 scale datasets are recommended for projects that are at the county
level.  1:24000 data should NOT be used for high accuracy base mapping such as
property parcel boundaries.
1:100000 scale datasets are recommended for projects that are at the
multi-county or regional level.
1:250000 scale datasets are recommended for projects that are at the regional or
state level or larger.
Vector datasets with no defined scale or accuracy should be considered suspect.
Make sure you are familiar with your data before using it for projects or
analyses.  Every effort has been made to supply the user with data
documentation.  For additional information, see the References section and the
Data Source Contact section of this documentation.  For more information
regarding scale and accuracy, see our web pages at:
http://www.geoplan.ufl.edu/education.html
 

FGDL QUALITY ASSURANCE STATUS:

-Reprojected data to FGDL Albers HPGN (See "Map Projection Parameters" below)
-Upcased all character records
-Clipped to the State of Florida
-DESCRIPT item added based on CNTYNAME
-Dropped item WORKB. 

REFERENCES:

Georgia GIS Data Clearinghouse
U.S. Geological Survey, Water Resources Div. (WRD)
 

DATA LINEAGE SUMMARY:

In 2001, the GeoPlan Center downloaded this data in shapefile format from the Georgia 
GIS Data Clearinghouse http://www.gis.state.ga.us/Clearinghouse/clearinghouse.html.  
When received, the geographic extent of the data was the Southeastern U.S. and it was
in the following projection: Albers, Datum: NAD27, Spheroid: CLARK1866, Units: Meters. 
The data was then reprojected to FGDL Albers HPGN and clipped to the State of Florida.
DESCRIPT item added based on CNTYNAME and lowercase characters within the attribute table 
were upcased.
 

MAP PROJECTION PARAMETERS:

  Projection                           ALBERS
  Units                                METERS
  Datum                                HPGN
  Spheroid                             GRS1980
  1st standard parallel                24   0  0.000
  2nd standard parallel                31  30  0.000
  central meridian                    -84   0  0.000
  latitude of projection's origin      24   0  0.000 
  false easting (meters)               400000.00000
  false northing (meters)              0.00000
 

DATA SOURCES CONTACT(S):

Name:                   William A. Battaglin , U.S. Geological Survey, Water Resources Div. (WRD)  
Abbr.name:              USGS WRD	
Address:                P.O. Box 25046, Denver Federal Center, Bldg. 25 
                        Lakewood, CO 80225 USA							
Phone: 	                 303-236-5939 		
Fax: 	                 303-236-5959 		
Web site:               www.usgs.gov		                 
Email:                  wbattagl@usgs.gov 
Contact Person:         William A. Battaglin 	
         Phone:         303-236-5939 	
         Email:         wbattagl@usgs.gov               
 

FGDL CONTACT:

Name:                    Florida Geographic Data Library
Abbr. Name:              FGDL
Address:                 Florida Geographic Data Library
                         431 Architecture
                         PO Box 115706
                         Gainesville, FL  32611-5706
Web site:                http://www.fgdl.org
Contact FGDL:
      Technical Support:                http://www.fgdl.org/fgdlfeed.html
      FGDL Frequently Asked Questions:  http://www.fgdl.org/fgdlfaq.html
      FGDL Mailing Lists:               http://www.fgdl.org/fgdl-l.html
      For FGDL Software:                http://www.fgdl.org/software.html