FLORIDA GEOGRAPHIC DATA LIBRARY DOCUMENTATION
VERSION 2003, RELEASED NOVEMBER, 2002.
USFWS NATIONAL WETLANDS INVENTORY - LINES
Geodataset Name: NWIL Geodataset Type: SHAPE Geodataset Feature: LINE
GENERAL DESCRIPTION:
This dataset contains records of wetlands linear location and classification as
defined by the U.S. Fish & Wildlife Service.
DATA SOURCE(S): U.S. Fish & Wildlife Service SCALE OF ORIGINAL SOURCE MAPS: 1:24000 DATE OF AUTOMATION OR SOURCE: Feb. 1971 to Dec. 1992 GEODATASET EXTENT: State of Florida
FEATURE ATTRIBUTE TABLES
Datafile Name: NWIL.DBF
NAME WIDTH TYPE PRECISION ATTRIBUTE 24 CHARACTER SYSTEM 1 CHARACTER SYSTEM_D 12 CHARACTER SUBSYSTEM 1 CHARACTER SUBSYS_D 20 CHARACTER CLASS1 2 CHARACTER CLASS1_D 30 CHARACTER SUBCLASS1 1 CHARACTER SUBCL1_D 30 CHARACTER SLASH 1 CHARACTER SLASH_D 4 CHARACTER CLASS2 2 CHARACTER CLASS2_D 30 CHARACTER SUBCLASS2 1 CHARACTER SUBCL2_D 30 CHARACTER WATER1 1 CHARACTER WATER1_D 36 CHARACTER WATER2 1 CHARACTER WATER2_D 36 CHARACTER CHEMISTRY 1 CHARACTER CHEMIST_D 22 CHARACTER SOIL 1 CHARACTER SOIL_D 10 CHARACTER SPECIAL1 1 CHARACTER SPECIAL1_D 26 CHARACTER SPECIAL2 1 CHARACTER
FEATURE ATTRIBUTE TABLES CODES AND VALUES:
The wetland classification system is hierarchical, with wetlands and deepwater habitats divided among five major systems at the broadest level. The five systems include Marine (open ocean and associated coastline), Estuarine (salt marshes and brackish tidal water), Riverine (rivers, creeks, and streams), Lacustrine (lakes and deep ponds), and Palustrine (shallow ponds, marshes, swamps, sloughs). Systems are further subdivided into subsystems which reflect hydrologic conditions. Below the subsystem is the class which describes the appearance of the wetland in terms of vegetation or substrate. Each class is further subdivided into subclasses; vegetated subclasses are described in terms of life form and substrate subclasses in terms of composition. The classification system also includes modifiers to describe hydrology (water regime), soils, water chemistry (pH, salinity), and special modifiers relating to man's activities (e.g., impounded, partly drained). See chart below for details:
SYSTEM SUBSYSTEM CLASS SUBCLASS
|- RB=Rock Bottom 1=Bedrock
| 2=Rubble
|
|- UB=Unconsolidated Bottom 1=Cobble-Gravel
| 2=Sand
| 3=Mud
| 4=Organic
|
|-- 1=SUBTIDAL----|- AB=Aquatic Bed 1=Algal
| | 3=Rooted Vascular
| | 5=Unknown
| | Submergent
| |
| |- RF=Reef 1=Coral
| | 3=Worm
| |
| |- OW=Open Water/Unknown Bottom
|
M=MARINE--------|
|
|
| |- AB=Aquatic Bed 1=Algal
| | 3=Rooted Vascular
| | 5=Unknown
| | Submergent
| |
| |- RF=Reef 1=Coral
|-- 2=INTERTIDAL--| 3=Worm
|
|- RS=Rocky Shore 1=Bedrock
| 2=Rubble
|
|- US=Unconsolidated Shore 1=Cobble-Gravel
2=Sand
3=Mud
4=Organic
SYSTEM SUBSYSTEM CLASS SUBCLASS
|- RB=Rock Bottom 1=Bedrock
| 2=Rubble
|
|- UB=Unconsolidated Bottom 1=Cobble-Gravel
| 2=Sand
| 3=Mud
| 4=Organic
|
|-- 1=SUBTIDAL----|- AB=Aquatic Bed 1=Algal
| | 3=Rooted Vascular
| | 4=Floating
| | Vascular
| | 5=Unknown
| | Submergent
| | 6=Unknown Surface
| |
| |- RF=Reef 2=Mollusc
| | 3=Worm
| |
| |- OW=Open Water/Unknown Bottom
|
E=ESTUARINE-----|
|
|
| |- AB=Aquatic Bed 1=Algal
| | 3=Rooted Vascular
| | 4=Floating
| | Vascular
| | 5=Unknown
| | Submergent
| | 6=Unknown Surface
| |
| |- RF=Reef 2=Mollusc
| | 3=Worm
| |
| |- SB=Streambed 3=Cobble-Gravel
| | 4=Sand
| | 5=Mud
| | 6=Organic
| |
| |- RS=Rocky Shore 1=Bedrock
| | 2=Rubble
| |
|-- 2=INTERTIDAL--|- US=Unconsolidated Shore 1=Cobble-Gravel
| 2=Sand
| 3=Mud
| 4=Organic
|
|- EM=Emergent 1=Persistent
| 2=Nonpersistent
|
|- SS=Scrub-Shrub 1=Broad-Leaved
| Deciduous
| 2=Needle-Leaved
| Deciduous
| 3=Broad-Leaved
| Evergreen
| 4=Needle-Leaved
| Evergreen
| 5=Dead
| 6=Indeterminate
| Deciduous
| 7=Indeterminate
| Evergreen
|
|- FO=Forested 1=Broad-Leaved
Deciduous
2=Needle-Leaved
Deciduous
3=Broad-Leaved
Evergreen
4=Needle-Leaved
Evergreen
5=Dead
6=Indeterminate
Deciduous
7=Indeterminate
Evergreen
SYSTEM SUBSYSTEM CLASS SUBCLASS
|- RB=Rock Bottom 1=Bedrock
| 2=Rubble
|
|- UB=Unconsolidated Bottom 1=Cobble-Gravel
| 2=Sand
|--1=TIDAL--------| 3=Mud
| | 4=Organic
| |
| |-*SB=Streambed 1=Bedrock
| | 2=Rubble
| | 3=Cobble-Gravel
|--2=LOWER | 4=Sand
| PERENNIAL----| 5=Mud
| | 6=Organic
| | 7=Vegetated
| |
| |- AB=Aquatic Bed 1=Algal
R=RIVERINE------|--3=UPPER | 2=Aquatic Moss
| PERENNIAL----| 3=Rooted Vascular
| | 4=Floating
| | Vascular
| | 5=Unknown
| | Submergent
|--4=INTERMITTENT-| 6=Unknown Surface
| |
| |- RS=Rocky Shore 1=Bedrock
| | 2=Rubble
| |
| |- US=Unconsolidated Shore 1=Cobble-Gravel
|--5=UNKNOWN | 2=Sand
| PERENNIAL----| 3=Mud
| 4=Organic
| 5=Vegetated
|
|-**EM=Emergent 2=Nonpersistent
|
|- OW=Open Water/Unknown Bottom
|
|-*STREAMBED is limited to TIDAL and
| INTERMITTENT SUBSYSTEMS, and comprises the
| only CLASS in the INTERMITTENT SUBSYSTEM.
|
|-**EMERGENT is limited to TIDAL and LOWER
| PERENNIAL SUBSYSTEMS.
SYSTEM SUBSYSTEM CLASS SUBCLASS
|- RB=Rock Bottom 1=Bedrock
| 2=Rubble
|
|- UB=Unconsolidated Bottom 1=Cobble-Gravel
| 2=Sand
| 3=Mud
| 4=Organic
|
|-- 1=LIMNETIC----|- AB=Aquatic Bed 1=Algal
| | 2=Aquatic Moss
| | 3=Rooted Vascular
| | 4=Floating
| | Vascular
| | 5=Unknown
| | Submergent
| | 6=Unknown Surface
| |
| |- OW=Open Water/Unknown Bottom
|
L=LACUSTRINE----|
|
|
| |- RB=Rock Bottom 1=Bedrock
| | 2=Rubble
| |
| |- UB=Unconsolidated Bottom 1=Cobble-Gravel
| | 2=Sand
| | 3=Mud
| | 4=Organic
| |
| |- AB=Aquatic Bed 1=Algal
| | 2=Aquatic Moss
| | 3=Rooted Vascular
| | 4=Floating
|-- 2=LITTORAL----| Vascular
| 5=Unknown
| Submergent
| 6=Unknown Surface
|
|- RS=Rocky Shore 1=Bedrock
| 2=Rubble
|
|- US=Unconsolidated Shore 1=Cobble-Gravel
| 2=Sand
| 3=Mud
| 4=Organic
| 5=Vegetated
|
|- EM=Emergent 2=Nonpersistent
|
|- OW=Open Water/Unknown Bottom
SYSTEM SUBSYSTEM CLASS SUBCLASS
|- RB=Rock Bottom 1=Bedrock
| 2=Rubble
|
|- UB=Unconsolidated Bottom 1=Cobble-Gravel
| 2=Sand
| 3=Mud
| 4=Organic
|
|- AB=Aquatic Bed 1=Algal
| 2=Aquatic Moss
| 3=Rooted Vascular
| 4=Floating
| Vascular
| 5=Unknown
| Submergent
| 6=Unknown Surface
|
|- US=Unconsolidated Shore 1=Cobble-Gravel
| 2=Sand
| 3=Mud
| 4=Organic
| 5=Vegetated
|
|- ML=Moss-Lichen 1=Moss
| 2=Lichen
|
P=PALUSTRINE----------------------|- EM=Emergent 1=Persistent
| 2=Nonpersistent
|
|- SS=Scrub-Shrub 1=Broad-Leaved
| Deciduous
| 2=Needle-Leaved
| Deciduous
| 3=Broad-Leaved
| Evergreen
| 4=Needle-Leaved
| Evergreen
| 5=Dead
| 6=Indeterminate
| Deciduous
| 7=Indeterminate
| Evergreen
|
|- FO=Forested 1=Broad-Leaved
| Deciduous
| 2=Needle-Leaved
| Deciduous
| 3=Broad-Leaved
| Evergreen
| 4=Needle-Leaved
| Evergreen
| 5=Dead
| 6=Indeterminate
| Deciduous
| 7=Indeterminate
| Evergreen
|
|- OW=Open Water/Unknown Bottom
MODIFIERS
|- A=Temporarily Flooded
|- B=Saturated
|- C=Seasonally Flooded
|- D=Seasonally Flooded/Well Drained
|- E=Seasonally Flooded/Saturated
|- F=Semipermanently Flooded
|--Non-Tidal------|- G=Intermittently Exposed
| |- H=Permanently Flooded
| |- J=Intermittently Flooded
| |- K=Artificially Flooded
| |- W=Intermittently Flooded/Temporary
| |- Y=Saturated/Semipermanent/Seasonal
| |- Z=Intermittently Exposed/Permanent
| |
WATER REGIME----| |- U=Unknown
|
|
|
|
| |- K=Artificially Flooded
| |- L=Subtidal
| |- M=Irregularly Exposed
| |- N=Regularly Flooded
|--Tidal----------|- P=Irregularly Flooded
|-*S=Temporary-Tidal
|-*R=Seasonal-Tidal
|-*T=Semipermanent-Tidal
|-*V=Permanent-Tidal
|- U=Unknown
|
|-*These water regimes are only used in
| tidally influenced, freshwater systems.
|- 1=Hyperhaline
|- 2=Euhaline
|--Coastal |- 3=Mixohaline (Brackish)
| Halinity-------|- 4-Polyhaline
| |- 5=Mesohaline
| |- 6=Oligohaline
| |- 0=Fresh
|
|
|
WATER CHEMISTRY-|
| |- 7=Hypersaline
|--Inland |- 8=Eusaline
| Salinity-------|- 9=Mixosaline
| |- 0=Fresh
|
|
|
|
|--pH Modifiers |- a=Acid
for all |- t=Circumneutral
Fresh Water----|- i=Alkaline
SOIL------------------------------|- g=Organic
|- n=Mineral
|- b=Beaver
|- d=Partially Drained/Ditched
SPECIAL MODIFIERS-----------------|- f=Farmed
|- h=Diked/Impounded
|- r=Artificial Substrate
|- s=Spoil
|- x=Excavated
U = Uplands
SYSTEM_D, SUBSYS_D, CLASS1_D, SUBCL1_D, SLASH_D, CLASS2_D, SUBCL2_D, WATER1_D, WATER2_D, CHEMIST_D, SOIL_D, SPECIAL1_D, SPECIAL2_D, SPECIAL3_D, and WET_UP_D are FGDL added verbal descriptions of the above codes. DESCRIPT is a FGDL item based on SYSTEM_D.
USER NOTES:
NWI digital data files are records of wetlands location and classification as defined by the U.S. Fish & Wildlife Service. This dataset is one of a series available in 7.5 minute by 7.5 minute blocks containing ground planimetric coordinates of wetlands point, line, and area features and wetlands attributes. When completed, the series will provide coverage for all of the contiguous United States, Hawaii, Alaska, and U.S. protectorates in the Pacific and Caribbean. The digital data as well as the hardcopy maps that were used as the source for the digital data are produced and distributed by the U.S. Fish & Wildlife Service's National Wetlands Inventory project
Federal, State, and local regulatory agencies with jurisdiction over wetlands may define and describe wetlands in a different manner than that used in this inventory. There is no attempt, in either the design or products of this inventory, to define the limits of proprietary jurisdiction of any Federal, State, or local government or to establish the geographical scope of the regulatory programs of government agencies. Persons intending to engage in activities involving modifications within or adjacent to wetland areas should seek the advice of appropriate Federal, State, or local agencies concerning specified agency regulatory programs and proprietary jurisdictions that may affect such activities.
Scale is an important factor in data usage. Certain scale datasets are not suitable for some project, analysis, or modeling 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
-Set Precision to DOUBLE
-Set Tolerances to FGDL Standards
-Added DESCRIPT item based on SYSTEM_D
REFERENCES:
DATA LINEAGE SUMMARY:
NWI maps are compiled through manual photointerpretation ( using Cartgraphic Engineering 4X Mirror Stereoscopes) of NHAP or NAPP aerial photography supplemented by Soil Surveys and field checking of wetland photo signatures. Delineated wetland boundaries are manually transferred from interpreted photos to USGS 7.5 minute topographic quadrangle maps and then manually labelled. Quality control steps occur throughout the photointerpretation, map compilation, and map reproduction processes.
Digital wetlands data are either manually digitized or scanned from stable-base copies of the 1:24,000 scale wetlands overlays registered to the standard U.S. Geological Survey (USGS) 7.5 minute quadrangles into topologically correct data files using Wetlands Analytical Mapping System (WAMS) software. Files contain ground planimetric coordinates and wetland attributes. The quadrangles were referenced to the North American Datum of 1927 (HPGN) horizontal datum. The scanning process captured the digital data at a scanning resolution of at least 0.001 inches; the resulting raster data were vectorized and then attributed on an interactive editing station. Manual digitizing used a digitizing table to capture the digital data at a resolution of at least 0.005 inches; attribution was performed as the data were digitized. The determination of scanning versus manual digitizing production method was based on feature density, source map quality, feature symbology, and availability of production systems. The data were checked for position by comparing plots of the digital data to the source material.
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: U.S. Fish & Wildlife Service,
National Wetlands Inventory
Abbr.name: USFWS, NWI
Address: 9720 Executive Center Drive
St.Petersburg, FL 33702
Phone: 813 570 5411
Fax: 813 570 5420
Web site: http://www.fws.gov
Contact Person: Chief Cartographer
Phone: 813 570 5411
FGDL CONTACT:
Name: FLORIDA GEOGRAPHIC DATA LIBRARY
Abbr. Name: FGDL
Address: Florida Geographic Data Library
431 Architecture Building
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