WaterWetlands_NWI

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: U.S. Fish & Wildlife Service, National

Publication_Date: 1983

Publication_Time: unknown

Title: WaterWetlands_NWI

Edition: 2003

Geospatial_Data_Presentation_Form: vector digital data

Series_Information:

Series_Name: National Wetlands Inventory data for Vermont

Issue_Identification: 2003

Publication_Information:

Publication_Place: St.Petersburg, Florida

Publisher: U.S. Fish & Wildlife Service,

Other_Citation_Details: Tile Structure - QUAD

Online_Linkage:

<http://www.vcgi.org/dataware/default.cfm?layer=WaterWetlands_NWI>

Online_Linkage:

<http://www.vcgi.org/dataware/default.cfm?layer=WaterWetlands_NWI&mapit=yes>

Online_Linkage:

<http://maps.vcgi.org:8080/wmsconnector/com.esri.wms.Esrimap?servicename=DATAWARE_VCGI&VERSION=1.1.1&request=getmap&BBOX=-72.78108248505863,44.28374275027345,-72.7204763913086,44.360521719023424&SRS=EPSG:4326&LAYERS=WATER_NWIALL_POLY&WIDTH=300&HEIGHT=400&FORMAT=image/gif>

Online_Linkage:

<http://www.vcgi.org/pub/dataware/gisdata/layers_vcgi/WaterWetlands_NWI/nwi_attribute.zip>

Online_Linkage: <http://nwi.fws.gov>

Description:

Abstract:

VCGI downloaded NWI quads from the US FWS web site and reprojected to VCS NAD83. NWI digital data files are records of wetlands location and classification as developed 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 polygon 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. Coverage includes both digital data and hardcopy maps. The NWI maps do not show all wetlands since the maps are derived from aerial photointerpretation with varying limitations due to scale, photo quality, inventory techniques, and other factors. Consequently, the maps tend to show wetlands that are readily photointerpreted given consideration of photo and map scale. In general, the older NWI maps prepared from 1970s-era black and white photography (1:80,000 scale) tend to be very conservative, with many forested and drier-end emergent wetlands (e.g., wet meadows) not mapped. Maps derived from color infrared photography tend to yield more accurate results except when this photography was captured during a dry year, making wetland identification equally difficult. Proper use of NWI maps therefore requires knowledge of the inherent limitations of this mapping. It is suggested that users also consult other information to aid in wetland detection, such as U.S. Department of Agriculture soil survey reports and other wetland maps that may have been produced by state and local governments, and not rely solely on NWI maps. See section on "Completeness_Report" for more information. Also see an article in the National Wetlands Newsletter (March-April 1997; Vol. 19/2, pp. 5-12) entitled "NWI Maps: What They Tell Us" (a free copy of this article can be ordered from U.S. Fish and Wildlife Service, ES-NWI, 300 Westgate Center Drive, Hadley, MA 01035, telephone, 413-253-8620).

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. The purpose of this survey was not to map all wetlands and deepwater habitats of the United States, but rather to use aerial photointerpretation techniques to produce thematic maps that show, in most cases, the larger ones and types that can be identified by such techniques. The objective was to provide better geospatial information on wetlands than found on the U.S. Geological Survey topographic maps. It was not the intent of the NWI to produce maps that show exact wetland boundaries comparable to boundaries derived from ground surveys. Boundaries are therefore generalized in most cases. Consequently, the quality of the wetland data is variable mainly due to source photography, ease or difficulty of interpreting specific wetland types, and survey methods (e.g., level of field effort and state-of-the-art of wetland delineation). See section on "Completeness_Report" for more information.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 19830101

Time_of_Day: Unknown

Currentness_Reference: Publication Date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -73.454162

East_Bounding_Coordinate: -71.465281

North_Bounding_Coordinate: 45.018361

South_Bounding_Coordinate: 42.722789

Keywords:

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category

Theme_Keyword: inlandWaters

Theme:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: wetlands

Theme_Keyword: hydrologic

Theme_Keyword: Land Cover

Theme_Keyword: Surface and manmade features

Place:

Place:

Place_Keyword_Thesaurus: USGS Quadrangle

Place_Keyword: Vermont

Access_Constraints:

VCGI and the State of VT make no representations of any kind, including but not limited to the warranties of merchantability or fitness for a particular use, nor are any such warranties to be implied with respect to the data.

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_Person_Primary:

Contact_Organization: U.S. Fish & Wildlife Service

Contact_Organization_Primary:

Contact_Organization: U.S. Fish & U.S. Fish & Wildlife Service

Browse_Graphic:

Browse_Graphic_File_Name:

<http://maps.vcgi.org:8080/wmsconnector/com.esri.wms.Esrimap?servicename=DATAWARE_VCGI&VERSION=1.1.1&request=getmap&BBOX=-72.78108248505863,44.28374275027345,-72.7204763913086,44.360521719023424&SRS=EPSG:4326&LAYERS=WATER_NWIALL_POLY&WIDTH=300&HEIGHT=400&FORMAT=image/gif>

Browse_Graphic_File_Description: GIF

Browse_Graphic_File_Type: GIF

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

The 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, quality control verification 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 quality control verification software (USFWS-NWI).

Completeness_Report:

NWI maps do not show all wetlands, but attempt to show most photointerpretable wetlands given considerations of map/photo scale and wetland delineation practices. A target mapping unit (tmu) is an estimate of the size class of the smallest group of wetlands that NWI attempts to map consistently; it is not the smallest wetland mapped. Recognize that some wetland types are conspicuous and readily mapped (e.g., marshes and ponds) and smaller ones may be mapped. Drier wetlands and forested wetlands (especially evergreen) are more difficult to photointerpret and larger ones may be missed. The tmu also varies with photo scale; in forested regions, the tmu may be 3-5 acres (1:80K photos), 1-3 acres (1:58K), or 1 acre (1:40K). NWI maps should show most wetlands larger than the tmu. In the treeless prairies, a 1/4 acre tmu is possible due to the openness of terrain and occurrence of wetlands in distinct depressions. Take notice of the photo scale/type used to make the maps (see legend) and realize that black and white photos tend to yield more conservative interpretations than color infrared film. Most farmed wetlands (e.g., mucklands) are usually not mapped, except for pothole-type wetlands, cranberry bogs, and diked former tidelands (Sacramento Valley). Partly drained wetlands are conservatively mapped due to photointerpretation limitations. No attempt was made to identify regulated wetlands from other wetlands. Recognize that maps produced through photointerpretation are not as accurate as one prepared from on-the-ground surveys, so NWI boundaries are generalized.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report: Horizontal

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator:

The Domain includes U.S. Geological Survey (USGS), U.S. Department of Agriculture (USDA), National Aeronautics and Space Administration (NASA), special project. Information for this element varies for each 7.5' quad.

Publication_Date: Unknown

Title:

The Domain includes National Aerial Photography Program (NAPP), National High Altitude Photography (NHAP), USDA, Farm Service Agency, Aerial Photography Field Office, NASA or special project photography. Information for this element varies for each 7.5' quad.

Geospatial_Data_Presentation_Form:

Publication_Information:

Publication_Place: Reston, VA

Publisher: U.S. Geological Survey

Source_Scale_Denominator: 1:80K

Type_of_Source_Media: Air photo

Source_Time_Period_of_Content:

Time_Period_Information:

Source_Currentness_Reference: Photo date

Source_Citation_Abbreviation: PHOTOS

Source_Contribution: Wetlands spatial and

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Geological Survey

Publication_Date: 1971

Title: Plainfield

Geospatial_Data_Presentation_Form: vector digital data

Publication_Information:

Publication_Place: Reston, Virginia

Publisher: U.S. Geological Survey

Source_Scale_Denominator: 1:24K

Type_of_Source_Media: stable-base material

Source_Time_Period_of_Content:

Time_Period_Information:

Source_Currentness_Reference: publication

Source_Citation_Abbreviation: USGS QUAD

Source_Contribution: base cartographic data

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S.D.A. Natural Resources

Publication_Date: Varies

Title: County Soil Surveys

Geospatial_Data_Presentation_Form: vector digital data

Publication_Information:

Publication_Place: Washington, DC

Publisher: Government Printing

Source_Scale_Denominator: Varies

Type_of_Source_Media: paper

Source_Time_Period_of_Content:

Time_Period_Information:

Source_Currentness_Reference: publication

Source_Citation_Abbreviation: SOILS

Source_Contribution: wetlands location and

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 labeled. 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 Arc/Info 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: PHOTOS

Source_Used_Citation_Abbreviation: USGS QUADS

Process_Date: Unknown

Source_Produced_Citation_Abbreviation: NWI

Process_Step:

Process_Description:

VCGI downloaded NWI quads from the US FWS web site and reprojected to VCS NAD83.

Process_Date: 20010816

Process_Time: Unknown

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Steve Sharp

Contact_Organization: VCGI

Contact_Position: GIS Database Administrator

Process_Step:

Process_Description:

VCGI added attribute value "NEATLINE" to identify quad boundary lines.

Process_Date: 20030206

Process_Time: Unknown

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Tom Williams

Contact_Organization: VCGI

Contact_Position: GIS Technician

Process_Step:

Process_Description:

VCGI downloaded the remaining NWI quads for Vermont from the US FWS web site and reprojected to VCS NAD83. It was noted that the BOLTON MOUNTAIN quad, tile number 0615, may have been incorrectly attributed. A large portion of the quad which appears to be UPLAND had been attributed as R3BBW. VCGI changed the attribute to "U" to maintain consistency with the other quads. The BLOOMFIELD quad does not have any delineated wetland polygons (USFS documentation suggests that there was no imagery available for this area). Three quads along the Northern border of the state are missing. These quads, MORGAN CENTER OE N, NORTON POND OE N, AVERILL LAKE OE, will be added when they are released.

Process_Date: 20030303

Process_Time: Unknown

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Tom Williams

Contact_Organization: VCGI

Contact_Position: GIS Technician

Process_Step:

Process_Description:

Downloaded updated data from US FWS for the following quads: Newfane,Hinsdale,Putney,North Pownal,Brandon,Bridport,Cornwall,Crown Point, East Middlebury,Orwell,Sudbury,Westminster West,Windsor,Townshend,Bakersfield, Cold Hollow Mountains,Enosburg Falls,Fairfield,Gilson Mountain,Jeffersonville, Richford,Sheldon Springs,Underhill,Colchester Point,East Alburg,Saint Albans Bay,Colchester, South Hero,Saint Albans,Rouses Point,North Hero,Milton,Highgate Center,Georgia Plains,Essex Center, Richmond,Huntington,Essex Junction,South Mountain,Mount Philo,Vergennes East,Middlebury,Hinesburg, Juniper Island,Charlotte,Vergennes West,Snake Mountain,Bristol,Port Henry,Burlington. Formerly missing quads MORGAN CENTER OE N, NORTON POND OE N, AVERILL LAKE OE were also downloaded. Quads were reprojected to VCS NAD83, and a neatline attribute was added to aid cartographic display.

Process_Date: 20040330

Process_Time: Unknown

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Tom Williams

Contact_Organization: VCGI

Contact_Position: GIS Technician

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Point_and_Vector_Object_Information

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: State Plane Coordinate System

State_Plane_Coordinate_System:

SPCS_Zone_Identifier: 4400

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.999964

Longitude_of_Central_Meridian: -72.500000

False_Easting: 500000.000000

False_Northing: 0.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 0.001

Ordinate_Resolution: 0.001

Planar_Distance_Units: Meters

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983

Ellipsoid_Name: Geodetic Reference System 80

Semi-major_Axis: 6378137

Denominator_of_Flattening_Ratio: 1 / 298.25722210

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Wetland

Entity_Type_Definition:

Wetlands are 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. For purposes of this classification wetlands must have one or more of the following three attributes: 1) at least periodically, the land supports predominantly hydrophytes; 2) the substrate is predominantly undrained hydric soil; and 3) the substrate is non-soil and is saturated with water or covered by shallow water at some time during the growing season of each year.

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: ATTRIBUTE

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. Generalized Lookup Table - <http://www.vcgi.org/pub/dataware/gisdata/layers_vcgi/WaterWetlands_NWI/nwi_attribute.zip>

Attribute_Domain_Values:

Codeset_Domain:

Codeset_Name: Valid wetland

Codeset_Source:

Photointerpretation Conventions for the National Wetlands Inventory, January 1995

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: VT Center for Geographic Information

Contact_Address:

Address_Type: Mailing and Physical Address

Address: 58 South Main Street, Suite 2

City: Waterbury

State_or_Province: VT

Postal_Code: 05676

Country: USA

Contact_Voice_Telephone: 802/882-3000

Contact_TDD/TTY_Telephone: None

Contact_Facsimile_Telephone: 802/882-3001

Contact_Electronic_Mail_Address: info@vcgi.uvm.edu

Hours_of_Service: 9am - 5pm, M-F

Resource_Description: WaterWetlands_NWI

Distribution_Liability:

VCGI and the State of Vermont make no representations of any kind, including but not limited to the warranties of merchantability or fitness for a particular use, nor are any such warranties to be implied with respect to the data.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: SHP

Format_Specification: ESRI Shapefile format (compressed to ZIP format)

Format_Information_Content: geospatial data

File_Decompression_Technique: ZIP decompression software

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

<http://www.vcgi.org/dataware/default.cfm?layer=WaterWetlands_NWI>

Access_Instructions: Download from web site.

Offline_Option:

Offline_Media: CD-ROM

Offline_Option:

Offline_Media: 3-1/2 inch floppy disk

Offline_Option:

Offline_Media: 4 mm cartridge tape

Offline_Option:

Offline_Media: 8 mm cartridge tape

Fees:

No charge when downloading from the internet, and when no custom processing is required.

Ordering_Instructions:

Download from web site or mail-fax a copy of the VCGI 'Data Request Form' which is available from the VGIS web site <http://www.vcgi.org/dataware/order_forms>

Turnaround: About 5 days.

Custom_Order_Process:

Mail or Fax a copy of the VCGI 'Data Request Form' which is available from <http://www.vcgi.org/dataware/order_forms>

Technical_Prerequisites: ESRI Arc/Info, ArcView, or ArcExplorer software.

Available_Time_Period:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 20020923

Time_of_Day: Unknown

Metadata_Reference_Information:

Metadata_Date: 20020924

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: VT Center for Geographic Information

Contact_Person: GIS Database Administrator

Contact_Address:

Address_Type: Mailing and Physical Address

Address: 58 South Main Street, Suite 2

City: Waterbury

State_or_Province: VT

Postal_Code: 05676

Country: USA

Contact_Voice_Telephone: 802/882-3000

Contact_TDD/TTY_Telephone: None

Contact_Facsimile_Telephone: 802/882-3001

Metadata_Standard_Name: FGDC Content Standards for Digital Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: Local time

Metadata_Access_Constraints: None

Metadata_Use_Constraints: None

Metadata_Security_Information:

Metadata_Security_Classification_System: N/A

Metadata_Security_Classification: Unclassified

Metadata_Security_Handling_Description: No security considerations