FLORIDA GEOGRAPHIC DATA LIBRARY DOCUMENTATION
VERSION 2006
TITLE: FLORIDAN AQUIFERS
Geodataset Name: AQUIP Geodataset Type: SHAPE Geodataset Feature: POLYGON
GENERAL DESCRIPTION:
This dataset shows the principal aquifers that supply ground water to the State of Florida. The aquifer that is shown in each geographic area is generally the uppermost principal aquifer for the area. Aquifers are shown as polygons.
DATA SOURCE(S): United States Geological Survey (USGS) Water Resources Division SCALE OF ORIGINAL SOURCE MAPS: 1: 2,500,000 DATE OF AUTOMATION OR SOURCE: 1998 GEODATASET EXTENT: State of Florida
FEATURE ATTRIBUTE TABLES:
Datafile Name: AQUIP.DBF ITEM NAME WIDTH TYPE PRECISION Shape 8 SHAPEPOLY 0 Area 19 DECIMAL 5 Perimeter 19 DECIMAL 5 Rock_name 45 CHARACTER - Rock_type 5 DECIMAL 0 Aq_name 65 CHARACTER 0 Aq_code 5 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 The size of the shape in coverage units Perimeter The perimeter of the shape in coverage units Rock_name The name of the permeable geologic material that composes the aquifer -Unconsolidated Sand & Gravel Aquifers: Formations composed of loose asand and gravel. -Semiconsolidated Sand Aquifers: Formations composed of partially solidified sand. -Carbonate-rock Aquifers: Formations composed of limestone and (or) dolomite. Rock_type The code number corresponding to the rock_name 0: Null value 100: Number for unconsolidated sand and gravel aquifers. 200: Number for semiconsolidated sand aquifers. 400: Number for carbonate-rock aquifers. 999: Number for areas that are not a principle aquifer. Aq_name The aquifer unit name Aq_code The code number corresponding to the aquifer unit name 111: Surficial Aquifer System 201: Coastal Lowlands Aquifer System 413: Floridan Aquifer System 414: Biscayne Aquifer 999: Not a principal aquifer. Rocks that are generally poorly permeable but locally may contain productive aquifers. Descript FGDL added item based on Aq_name
USER NOTES:
The aerial extent of the aquifers, as shown in this data set, represents the area in which a named aquifer is the shallowest of the principal aquifers. These aquifer areas are not necessarily the only areas in which ground water can be withdrawn, for two reasons: 1) The aquifers shown may have a larger areal extent than is represented here. The boundaries in this data set generally represent an interpretation of the surface location (outcrop), or near-surface location (shallow subcrop) of the uppermost principal aquifer for the area. An aquifer may extend beyond the area shown, but be overlain by one or more other aquifers, and (or) low- permeability material. 2) There may be areas of water-bearing surficial material not shown in this data set. Major alluvial aquifers that occur along main watercourses are not shown. Significant unconsolidated sand and gravel aquifers, that are not indicated in this data set but are important sources of water, may occur locally in glaciated regions. The user of this data set is advised that to get complete information regarding areas that serve as sources of water, more information about surficial aquifers needs to be obtained, particularly in glaciated areas. A note concerning data 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:
-Projected data to FGDL Albers HPGN (See "Map Projection Parameters" below). -Clipped to the State of Florida -DESCRIPT item added based on Aq_name -Upcased all character records. -Dropped internal coverage items: Aquifrp025#, Aquifrp025-ID
REFERENCES:
Information about the dataset and links to general aquifer information: http://nationalatlas.gov/atlasftp.html
DATA LINEAGE SUMMARY:
Data originally released by USGS in 1998. Data was downloaded by GeoPlan in shapefile format from the National Atlas (http://nationalatlas.gov/atlasftp.html) in 2001. When received, data was in the following projection: Geographic, Datum: NAD 83, Spheroid: GRS80, Units: Decimal Degrees. The shapefile was then clipped to the State of Florida, and projected to FGDL Albers HPGN.
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: United States Geological Survey, Water Resources Division
Abbr.name: USGS, WRD
Address: 12201 Sunrise Valley Drive, Reston, VA, 20192
Phone: 1-800-426-9000
Web site: http://nationalatlas.gov/
Ftp site: http://nationalatlas.gov/atlasftp.html
Email: atlasmail@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