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National Wetlands Inventory

National Wetlands Inventory

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Fish & Wildlife Service, National Wetlands Inventory
Publication_Date: 200502
Title: National Wetlands Inventory
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publication_Place: Durham, New Hampshire
Publisher: Complex Systems Research Center, University of New Hampshire
Online_Linkage: <URL:http://www.granit.sr.unh.edu/cgi-bin/nhsearch?dset=nwi/nh>
Larger_Work_Citation:
Citation_Information:
Originator: Complex Systems Research Center, University of New Hampshire
Publication_Date: 19860101
Title: NH GRANIT Database
Publication_Information:
Publication_Place: Durham, New Hampshire
Publisher: Complex Systems Research Center, University of New Hampshire
Online_Linkage: URL:<http://www.granit.sr.unh.edu>
Description:
Abstract:
NWI digital data contains records of wetlands location and classification as defined by the U.S. Fish & Wildlife Service. The digital data as well as the hardcopy maps that were used as the source for the digital data are produced by the U.S. Fish & Wildlife Service's National Wetlands Inventory project.

For attribute definitions, please see the file NWImapcode.doc.

Purpose:
The data provide 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.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 197102
Ending_Date: 199212
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Irregular
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -72.594653
East_Bounding_Coordinate: -70.664747
North_Bounding_Coordinate: 45.307189
South_Bounding_Coordinate: 42.693632
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: nwi
Theme_Keyword: national wetlands inventory
Theme_Keyword: water resources
Theme_Keyword: wetlands
Theme_Keyword: hydrologic
Theme_Keyword: land cover
Theme_Keyword: surface and manmade features
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: United States
Place_Keyword: Northeast
Place_Keyword: New England
Place_Keyword: New Hampshire
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: U.S. Fish & Wildlife Service, National Wetlands Inventory
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: 727-570-5400
Browse_Graphic:
Browse_Graphic_File_Name:
<URL:http://www.granit.sr.unh.edu/cgi-bin/load_file?PATH=/data/database/d-webdata/nwi/browse.gif>
Browse_Graphic_File_Description: gif image file
Browse_Graphic_File_Type: GIF
Data_Set_Credit: U.S. Fish & Wildlife Service, National Wetlands Inventory
Native_Data_Set_Environment:
NWI uses Wetlands Analytical Mapping System (WAMS) software version 4.06 running under the SUNOS 4.x operating system to digitize wetlands information.

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 neatline 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 neatline is generated by connecting the four corners of the digital file, as established during initialization of the digital file. All data crossing the neatline are clipped to the neatline and data within a specified tolerance of the neatline are snapped to the neatline. 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.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator:
Includes U.S. Geological Survey (USGS), U.S. Department of Agriculture (USDA), National Aeronautics and Space Administration (NASA), special project
Publication_Date: varies
Title:
Includes National Aerial Photography Program (NAPP), National High Altitude Photography (NHAP), Agricultural and Stabilization Conservation Service (ASCS), NASA or special project photography
Geospatial_Data_Presentation_Form: remote-sensing image
Source_Scale_Denominator: varies
Type_of_Source_Media: transparency
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 197102
Ending_Date: 199212
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: NWI1
Source_Contribution: wetlands spatial and attribute information
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: varies
Title: topographic map
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Source_Scale_Denominator: varies
Type_of_Source_Media: paper
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1902
Ending_Date: 1992
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: varies
Title: varies
Publication_Information:
Publication_Place: St.Petersburg, Florida
Publisher: U.S. Fish & Wildlife Service, National Wetlands Inventory
Source_Scale_Denominator: varies
Type_of_Source_Media: stable-base material
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1979
Ending_Date: 1994
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: NWI3
Source_Contribution: wetlands location and classification
Source_Information:
Source_Citation:
Citation_Information:
Originator: Complex Systems Research Center, University of New Hampshire
Publication_Date: 19920101
Title: New Hampshire Political Boundaries at 1:24,000 Scale
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publication_Place: Durham, NH
Publisher: Complex Systems Research Center, University of New Hampshire
Online_Linkage: <URL:http://www.granit.sr.unh.edu/cgi-bin/nhsearch?dset=pb/nh>
Source_Scale_Denominator: 24000
Type_of_Source_Media: digital tape media
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1953
Ending_Date: 1990
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: CSRC1
Source_Contribution: provide New Hampshire state boundary
Process_Step:
Process_Description:
NWI maps are compiled through manual photointerpretation 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.
Source_Used_Citation_Abbreviation: NWI1
Source_Used_Citation_Abbreviation: NWI2
Process_Date: varies
Source_Produced_Citation_Abbreviation: NWI3
Process_Step:
Process_Description:
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 (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: varies
Process_Step:
Process_Description:
Data for each 7.5' quad were downloaded from the NWI ftp site (<ftp://enterprise.nwi.fws.gov>) in arc interchange format (.e00). Each file was imported into ARC/INFO and projected to NH State Plane feet. Adjacent quadrangles were edge-matched in Arcedit.
Process_Date: 200107
Process_Step:
Process_Description:
Appended individual quads into a statewide layer. Unioned with state outline and dissolved on NWICODE attribute. Then eliminated slivers along the western bank of CT River - primarily those coded as uplands. Also got rid of small, uncoded polygons along Canadian border. Added a new attribute - NWITYPE.

NOTE: Two recodes prior to dissolve: Section of the Connecticut River in Brattleboro East Quad (GRANIT ID 188) - coded as L1UBHh (lacustrine) in original, quad-based data. Recoded to riverine. Same for Bellows Falls Quad (GRANIT ID 143).

No attempt was made to fix spatial/dissolve errors at quad boundaries other than the default node snapping tolerance of 20 ft.

Source_Used_Citation_Abbreviation: CSRC1
Process_Date: 200505

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Complete chain
Point_and_Vector_Object_Count: 159054
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Label point
Point_and_Vector_Object_Count: 86634
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 86634
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 4

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: State Plane Coordinate System 1983
State_Plane_Coordinate_System:
SPCS_Zone_Identifier: 2800
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999967
Longitude_of_Central_Meridian: -71.666667
Latitude_of_Projection_Origin: 42.500000
False_Easting: 984250.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.004430
Ordinate_Resolution: 0.004430
Planar_Distance_Units: survey feet
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

Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: nwinh.aat
Entity_Type_Definition: arc attribute table
Entity_Type_Definition_Source: None
Attribute:
Attribute_Label: FID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: FNODE#
Attribute_Definition: Internal node number for the beginning of an arc (from-node).
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Whole numbers that are automatically generated.
Attribute:
Attribute_Label: TNODE#
Attribute_Definition: Internal node number for the end of an arc (to-node).
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Whole numbers that are automatically generated.
Attribute:
Attribute_Label: LPOLY#
Attribute_Definition: Internal node number for the left polygon.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Whole numbers that are automatically generated.
Attribute:
Attribute_Label: RPOLY#
Attribute_Definition: Internal node number for the right polygon.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Whole numbers that are automatically generated.
Attribute:
Attribute_Label: LENGTH
Attribute_Definition: Length of feature in internal units.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Positive real numbers that are automatically generated.
Attribute:
Attribute_Label: NWINH#
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: NWINH-ID
Attribute_Definition: User-defined feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: User defined.
Attribute:
Attribute_Label: NWICODE
Attribute_Definition: classification of the wetland
Attribute_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_Domain_Values:
Codeset_Domain:
Codeset_Name: valid wetland classification code list
Codeset_Source:
Photointerpretation Conventions for the National Wetlands Inventory, March 1990
Detailed_Description:
Entity_Type:
Entity_Type_Label: nwinh.pat
Entity_Type_Definition: polygon attribute table
Entity_Type_Definition_Source: None
Attribute:
Attribute_Label: FID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
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 feature in internal units squared.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Positive real numbers that are automatically generated.
Attribute:
Attribute_Label: PERIMETER
Attribute_Definition: Perimeter of feature in internal units.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Positive real numbers that are automatically generated.
Attribute:
Attribute_Label: NWINH#
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: NWINH-ID
Attribute_Definition: User-defined feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: User defined.
Attribute:
Attribute_Label: NWICODE
Attribute_Definition: classification of the wetland
Attribute_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_Domain_Values:
Codeset_Domain:
Codeset_Name: valid wetland classification code list
Codeset_Source:
Photointerpretation Conventions for the National Wetlands Inventory, March 1990
Attribute:
Attribute_Label: NWITYPE
Attribute_Definition: wetland classification system abbreviation
Attribute_Definition_Source: U.S. Fish and Wildlife Service
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: M
Enumerated_Domain_Value_Definition: Marine
Enumerated_Domain_Value_Definition_Source: U.S. Fish and Wildlife Service
Enumerated_Domain:
Enumerated_Domain_Value: E
Enumerated_Domain_Value_Definition: Estuarine
Enumerated_Domain_Value_Definition_Source: U.S. Fish and Wildlife Service
Enumerated_Domain:
Enumerated_Domain_Value: R
Enumerated_Domain_Value_Definition: Riverine
Enumerated_Domain_Value_Definition_Source: U.S. Fish and Wildlife Service
Enumerated_Domain:
Enumerated_Domain_Value: L
Enumerated_Domain_Value_Definition: Lacustrine
Enumerated_Domain_Value_Definition_Source: U.S. Fish and Wildlife Service
Enumerated_Domain:
Enumerated_Domain_Value: P
Enumerated_Domain_Value_Definition: Palustrine
Enumerated_Domain_Value_Definition_Source: U.S. Fish and Wildlife Service
Enumerated_Domain:
Enumerated_Domain_Value: U
Enumerated_Domain_Value_Definition: Uplands
Enumerated_Domain_Value_Definition_Source: U.S. Fish and Wildlife Service
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).

In some cases, arcs on either side of quadrangle boundaries were misaligned. When this occurred, the interior section of quadrangle boundary was re-coded "connector."

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:
Photointerpretation Conventions for the National Wetlands Inventory, March 1990

Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Complex Systems Research Center, University of New Hampshire
Contact_Person: GRANIT Database Manager
Contact_Position: GRANIT Database Manager
Contact_Address:
Address_Type: mailing and physical address
Address: Morse Hall, University of New Hampshire
City: Durham
State_or_Province: NH
Postal_Code: 03824
Country: US
Contact_Voice_Telephone: 603-862-1792
Contact_Facsimile_Telephone: 603-862-0188
Contact_Electronic_Mail_Address: granit@unh.edu
Hours_of_Service: 8:30AM-5PM. EST
Resource_Description: Downloadable Data
Distribution_Liability:
Digital data in NH GRANIT represent the efforts of the contributing agencies to record information from the cited source materials. Complex Systems Research Center, under contract to the NH Office of Energy and Planning, and in consultation with cooperating agencies, maintains a continuing program to identify and correct errors in these data. OEP, CSRC, and the cooperating agencies make no claim as to the validity or reliability or to any implied uses of these data.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ARCE
Transfer_Size: 227
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: URL:<http://www.granit.sr.unh.edu>
Fees:
No charge when downloaded from the Internet. Cost of reproduction for provision on CD/ROM of other media.
Ordering_Instructions:
Email GRANIT (granit@unh.edu) or order from web site (www.granit.sr.unh.edu).
Turnaround: Two weeks.
Technical_Prerequisites: None.

Metadata_Reference_Information:
Metadata_Date: 20060215
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Complex Systems Research Center, University of New Hampshire
Contact_Person: GRANIT Database Manager
Contact_Position: GRANIT Database Manager
Contact_Address:
Address_Type: mailing and physical address
Address: Morse Hall, University of New Hampshire
City: Durham
State_or_Province: NH
Postal_Code: 03824
Country: US
Contact_Voice_Telephone: 603-862-1792
Contact_Facsimile_Telephone: 603-862-0188
Contact_Electronic_Mail_Address: granit@unh.edu
Hours_of_Service: 8:30AM-5PM, EST
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile

Generated by mp version 2.8.13 on Thu Dec 13 10:07:26 2007
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