(NWI) National Wetland Inventory of Worcester County, Maryland

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Fish Wildlife Service, National Wetlands Inventory
Publication_Date: 1981
Title:
(NWI) National Wetland Inventory of Worcester County, Maryland
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publication_Place: St.Petersburg, Florida
Publisher: U.S. Fish Wildlife Service, National Wetlands Inventory
Online_Linkage: http://science.nature.nps.gov/nrdata
Description:
Abstract:
This data set shows all of the wetlands that are located in Worcester County, Maryland. National Wetland Inventory (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.
Purpose:
The data set provides consultants, planners, and resource managers with information on wetland location and type. The data were collected to meet U.S. Fish & Wildlife Service's mandate to map the wetland and deepwater habitats of the United States.
Supplemental_Information:
Many of the attributes for this data are left blank in this metadata due to the complexity of the classification systems that are used, any information that is not provided here can be obtained by going to the United States Fish and Wildlife website located at www.fws.gov/nwi/ The classification information is available at: http://wetlandsfws.er.usgs.gov/nwi/misc_docs/mapcodeslegend.pdf
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: unknown
Currentness_Reference:
source photography date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Irregular
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -75.665555
East_Bounding_Coordinate: -74.999623
North_Bounding_Coordinate: 38.452455
South_Bounding_Coordinate: 37.994016
Keywords:
Theme:
Theme_Keyword_Thesaurus: Assateague Island National Seashore Keyword Thesaurus
Theme_Keyword: wetlands
Theme_Keyword: marshes
Theme:
Theme_Keyword_Thesaurus: National Park Service Theme Category Thesaurus
Theme_Keyword: Wetlands
Theme_Keyword: Water
Theme_Keyword: Biology
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: environment
Theme_Keyword: biota
Place:
Place_Keyword_Thesaurus: Geographic Names Information System
Place_Keyword: North America
Place_Keyword: Maryland
Place_Keyword: Worcester County
Place_Keyword: Assateague Island National Seashore
Place:
Place_Keyword_Thesaurus: National Park System Unit Name Thesaurus
Place_Keyword: Assateague Island National Seashore
Place:
Place_Keyword_Thesaurus: National Park System Unit Code Thesaurus
Place_Keyword: ASIS
Access_Constraints: None
Use_Constraints:
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.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: United States Fish and Wildlife
Contact_Position: Chief Cartographer
Contact_Address:
Address_Type: mailing and physical address
Address:
9720 Executive Center Drive
City: St.Petersburg
State_or_Province: Florida
Postal_Code: 33702
Contact_Voice_Telephone: 813-570-5411
Contact_Facsimile_Telephone: 813-570-5420
Contact_Electronic_Mail_Address: linda@enterprise.nwi.fws.gov
Hours_of_Service: 8:00am-4:30pm
Native_Data_Set_Environment:
Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 8.2.0.700
Cross_Reference:
Citation_Information:
Originator: United States Fish and Wildlife
Publication_Date: 1981
Title:
Metadata for (NWI) National Wetland Inventory of Worcester County, Maryland
Geospatial_Data_Presentation_Form: vector digital data
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Attribute accuracy is tested by manual comparison of the
source with hard copy printouts and/or symbolized display
of the digital wetlands data on an interactive computer
graphic system. In addition, WAMS software (USFWS-NWI)
tests the attributes against a master set of valid wetland
attributes.
Logical_Consistency_Report:
Polygons intersecting the neat line are closed along the
border. Segments making up the outer and inner
boundaries of a polygon tie end-to-end to completely
enclose the area. Line segments are a set of sequentially
numbered coordinate pairs. No duplicate features exist nor
duplicate points in a data string.  Intersecting lines are
separated into individual line segments at the point of
intersection. Point data are represented by two sets of
coordinate pairs, each with the same coordinate values. All
nodes are represented by a single coordinate pair which
indicates the beginning or end of a line segment. The
neat line is generated by connecting the four corners
of the digital file, as established during initialization of the
digital file.  All data crossing the neat line are clipped to the
neat line and data within a specified tolerance of the
neat line are snapped to the neat line. Tests for logical
consistency are performed by WAMS verification software
(USFWS-NWI).
Completeness_Report:
All photo-interpretable wetlands are mapped. In the treeless
prairies, 1/4 acre wetlands are mapped. In forested areas,
small open water and emergent wetlands are mapped. In
general, the minimum mapping unit is from 1 to 3 acres
depending on the wetland type and the scale and emulsion
of the source aerial photography.  In regions of the country
where evergreen forested wetlands predominate, wetlands
smaller than 3 acres may not be mapped.  Thus, a detailed
on the ground and historical analysis of a single site may
result in a revision of the wetland boundaries established
through photographic interpretation.  In addition, some small
wetlands and those obscured by dense forest cover may
not be included in this dataset.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
unknown
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
unknown
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Geological Survey (USGS)
Originator: U.S. Department of Agriculture (USDA)
Originator: National Aeronautics and Space Administration (NASA)
Publication_Date: 19920000
Title:
Domain includes National Aerial Photography Program (NAPP), National High Altitude Photography (NHAP), Agricultural and Stabilization Conservation Service (ASCS), NASA or special project photography
Publication_Information:
Publication_Place: U.S. Geological Survey (USGS), U.S. Department of Agriculture (USDA), National Aeronautics and Space Administration (NASA), special project.
Source_Scale_Denominator: 1:20000 to 1:132000
Type_of_Source_Media: black and white, color infrared, or natural color aerial photograph film transparency.
Source_Time_Period_of_Content:
Source_Currentness_Reference:
photo date
Source_Citation_Abbreviation:
NWI1
Source_Contribution:
wetlands spatial and attribute information
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 19920000
Title:
topographic map
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place: Reston,VA
Publisher: U.S. Geological Survey
Source_Scale_Denominator: 1:20000, 1:24000, 1:25000, 1:3000, and 1:62500
Type_of_Source_Media: paper
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19020000
Ending_Date: 19920000
Source_Currentness_Reference:
Publication Date
Source_Citation_Abbreviation:
NWI2
Source_Contribution:
base cartographic data
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Fish Wildlife Service, National Wetlands Inventory
Publication_Date: 19940215
Title:
varies for 7.5 quad
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place: St.Petersburg,Florida
Publisher: U.S. Fish Wildlife Service, National Wetlands Inventory
Source_Scale_Denominator: 1:20000, 1:24000, 1:25000, 1:3000, and 1:62500
Type_of_Source_Media: stable-base material
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19790000
Ending_Date: 19940000
Source_Currentness_Reference:
Publication Date
Source_Citation_Abbreviation:
NWI3
Source_Contribution:
wetlands location and classification
Process_Step:
Process_Description:
NWI maps are compiled through manual photo interpretation
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 labeled.  Quality
control steps occur throughout the photo interpretation, map
compilation, and map reproduction processes.
Source_Used_Citation_Abbreviation:
NWI1
Source_Used_Citation_Abbreviation:
NWI2
Process_Date: 19940000
Source_Produced_Citation_Abbreviation:
NWI3
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Fish and Wildlife
Contact_Position: Chief cartographer
Contact_Address:
Address_Type: mailing and physical address
Address:
7206 National Seashore Lane
City: St. Petersburg
State_or_Province: Florida
Postal_Code: 33702
Country: United States
Contact_Voice_Telephone: 813-570-5411
Contact_Facsimile_Telephone: 813-570-5420
Contact_Electronic_Mail_Address: linda@enterprise.nwi.fws.gov
Hours_of_Service: 8:00am-4:30pm
Process_Step:
Process_Description:
Digital wetlands data are either manually digitized or
scanned from stable-base copies of the 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 (NAD27) 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.
Source_Used_Citation_Abbreviation:
NWI3
Process_Date: 20000229
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: United States Fish and Wildlife
Contact_Position: Chief Cartographer
Contact_Address:
Address_Type: mailing and physical address
Address:
9720 Executive Drive
City: St. Petersburg
State_or_Province: Florida
Postal_Code: 33702
Country: United States
Contact_Voice_Telephone: 813-570-5411
Contact_Facsimile_Telephone: 813-570-5420
Contact_Electronic_Mail_Address: linda@enterprise.nwi.fws.gov
Hours_of_Service: 8:00am-4:30pm
Process_Step:
Process_Description:
The Maryland Coastal Bays Program has reprojected
NATIONAL WETLANDS INVENTORY (NWI) data which
was received from the U.S. Fish & Wildlife Service,  the
data producer and custodian.  The coordinate system has
been changed to Maryland State Plane NAD27 fipszone
1900 as well as UTM NAD83 zone 18.  These changes
were performed using UNIX ARC/INFO 7.1.1 - PROJECT
command..
Additional conversions have also been performed on the
NATIONAL WETLANDS INVENTORY (NWI) data for use
in the Worcester County/Maryland Coastal Bays
Watershed.
(1) The dataset, originally provided by the U.S. Fish &
Wildlife Service in several small sections in dlg format, has
been merged to a single dataset including only area within
Worcester County and the area within the Coastal Bays
watershed.  This was accomplished by using the MAPJOIN
and CLIP commands in A/I with county and watershed
boundary polygons provided by the Maryland Department of
Natural Resources.  The Coastal Bays Watershed
boundary, including DE and VA, was attained from the EPA
- Basins dataset and is a generalized boundary.
(2) Where necessary, the DISSOLVE command was also
used to eliminate boundary lines between the original
individual datasets in the final merged coverage.**This may
have caused a change in the dataset through the loss of
polygons or arcs originally in the individual datasets.
Although we were diligent in preventing any loss of relevant
data, we cannot make assurances that data was not lost.
Process_Date: Unknown
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Assateague Island National Seashore
Contact_Position: GIS Specialist
Contact_Address:
Address_Type: mailing and physical address
Address:
7206 National Seashore Lane
City: Berlin
State_or_Province: Maryland
Postal_Code: 21811
Country: United States
Contact_Voice_Telephone: 410-641-1443
Contact_Facsimile_Telephone: 410-641-1099
Contact_Electronic_Mail_Address: asis_gis@nps.gov
Hours_of_Service: 8:30am - 4:30pm Monday - Friday
Cloud_Cover: none
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Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: G-polygon
Point_and_Vector_Object_Count: 4837
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Entity point
Point_and_Vector_Object_Count: 4851
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 4837
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 112
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Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 18
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -75.000000
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: 0.000128
Ordinate_Resolution: 0.000128
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222
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Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: md_nwi_u83m
Entity_Type_Definition:
lands transitional between terrestrial and aquatic systems where the water table is usually at or near the surface or the land is covered by shallow water.
Entity_Type_Definition_Source:
Cowardin, L.M., V. Carter, F. Golet, and E. LaRoe. 1979. Classification of wetlands and deepwater habitats of the United States. U.S. Fish Wildlife Service. 103 pp.
Attribute:
Attribute_Label: FID
Attribute_Definition:
Internal feature number.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name: valid wetland classification code list
Codeset_Source: Photo interpretation Conventions for the National Wetlands Inventory, March 1990
Attribute:
Attribute_Label: Shape
Attribute_Definition:
Feature geometry.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Coordinates defining the features.
Attribute:
Attribute_Label: AREA
Attribute_Definition:
Area of the features in square meters
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 77.056100
Range_Domain_Maximum: 719794099.634
Attribute_Units_of_Measure: square meters
Attribute:
Attribute_Label: PERIMETER
Attribute_Definition:
Perimeter of features in meters
Attribute_Definition_Source:
ASIS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 77.056100
Range_Domain_Maximum: 719794099.634
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: MD_NWI_3M_
Attribute:
Attribute_Label: NWI_TYPE
Attribute:
Attribute_Label: SYSTEM
Attribute:
Attribute_Label: SUBSYSTEM
Attribute:
Attribute_Label: CLASS1
Attribute:
Attribute_Label: SUBCLASS1
Attribute:
Attribute_Label: SLASH
Attribute:
Attribute_Label: CLASS2
Attribute:
Attribute_Label: SUBCLASS2
Attribute:
Attribute_Label: WATER1
Attribute:
Attribute_Label: WATER2
Attribute:
Attribute_Label: CHEMISTRY
Attribute:
Attribute_Label: SOIL
Attribute:
Attribute_Label: SPECIAL1
Attribute:
Attribute_Label: SPECIAL2
Attribute:
Attribute_Label: SPECIAL3
Attribute:
Attribute_Label: WET_UP
Attribute:
Attribute_Label: WET/UP
Overview_Description:
Entity_and_Attribute_Overview:
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).

The NWI wetland code interpreter is an excellent tool for determining wetland classifications, available at - http://wetlandsfws.er.usgs.gov/NWI/webatx/atx.html.  Simply enter the code found in the attribute NWI_Type (without any spaces) and click on 'Submit'.
Entity_and_Attribute_Detail_Citation:
Cowardin, L.M., V. Carter, F. Golet, and E. LaRoe. 1979. Classification of wetlands and deepwater habitats of the United States. U.S. Fish Wildlife Service. 103 pp.
Entity_and_Attribute_Detail_Citation:
Photo interpretation Conventions for the National Wetlands Inventory, March 1990
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: United States Fish and Wildlife
Contact_Position: N/A
Contact_Address:
Address_Type: mailing address
Address:
9720 Executive Center Drive
City: St. Petersburg
State_or_Province: Florida
Postal_Code: 33702
Country: United States
Contact_Voice_Telephone: 813-570-5411
Contact_Facsimile_Telephone: 813-570-5420
Contact_Electronic_Mail_Address: linda@enterprise.nwi.fws.gov
Hours_of_Service: 8:00am-4:30pm
Resource_Description: Downloadable Data
Distribution_Liability:
none
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: shp
Fees: contact USGS for information
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: DLG
Format_Version_Number: 3
Format_Specification:
Optional
File_Decompression_Technique: No compression applied
Transfer_Size: 6.074
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: ftp:192.189.43.33 dlgdata directory
Access_Instructions:
Anyone with access to the Internet may connect to NWI's server via anonymous ftp and download available NWI digital wetlands data in DLG3-Optional format. Indexes for NWI hardcopy maps and digital data are also available as well as digital wetlands data in a variety of other formats (MOSS Export, GRASS vector, DXF, and ARC Export) for 14 sample 7.5 minute quadrangles throughout the USA. To ftp to the NWI server, login as anonymous, enter your e-mail address at the password prompt, change to the dlgdata directory for DLG data, change to the maps directory for indexes, change to the samples directory for a sampling of digital data files in formats other than DLG. Use the ftp 'get' command to transfer readme file for further instructions.
Online_Computer_and_Operating_System:
Sun Model 690MP Unix server. SunOS 4.X operating system.
Digital_Transfer_Option:
Offline_Option:
Offline_Media: 8 mm cartridge tape
Recording_Format: tar
Recording_Format: ASCII recording mode
Digital_Transfer_Option:
Offline_Option:
Offline_Media: 1/4 inch cartridge tape
Recording_Format: tar
Fees: Digital Form - The online copy of the DLG data set may be retrieved via ftp at no charge. For delivery of digital data purchased by single 7.5 $40 per dataset; purchased in groups of $90 base fee plus $7 per dataset. Non-digital Form - $3.50 per diazo paper map; $5.25 per diazo mylar map.
Ordering_Instructions:
For digital data orders on 3.5" floppy disk, a maximum order
of 10 quads is allowed.  Data may be ordered in
latitude/longitude or State Plane Coordinate System
coordinates (Universal Transverse Mercator coordinates
are standard).  Latitude/longitude coordinates are not
available with GRASS format. For this service, the user
must order data through USGS-ESIC for delivery on
magnetic media.  Please specify the desired coordinate
specify wetlands
overlay or wetlands overlayed with composite  USGS base
map.
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Metadata_Reference_Information:
Metadata_Date: 20061010
Metadata_Review_Date: 20000229
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Fish Wildlife Service, National Wetlands Inventory
Contact_Person: Linda Shaffer
Contact_Position: Chief Cartographer
Contact_Address:
Address_Type: mailing and physical address
Address:
9720 Executive Center Drive
City: St.Petersburg
State_or_Province: Florida
Postal_Code: 33702
Country: United States
Contact_Voice_Telephone: 813 570 5411
Contact_Facsimile_Telephone: 813 570 5420
Contact_Electronic_Mail_Address: linda@enterprise.nwi.fws.gov
Hours_of_Service: 8:00am-4:30pm
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Access_Constraints: none
Metadata_Use_Constraints:
none
Metadata_Extensions:
Online_Linkage: http://www.esri.com/metadata/esriprof80.html
Profile_Name: ESRI Metadata Profile
Metadata_Extensions:
Online_Linkage: http://nrdata.nps.gov/profiles/nps_profile.xml
Profile_Name: NPS Metadata Profile
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