nwilpd

Citation:

Citation Information:

Originator: U.S. Fish and Wildlife Service (USFW) National Wetlands Inventory (NWI), Maine Office of Geographic Information Systems (MEGIS) (ed.)
Publication Date: 1998
Publication Time: Unknown
Title: nwilpd
Geospatial Data Presentation Form: vector digital data
Series Information:

Series Name: Maine GIS
Issue Identification: SDE server; Internet Data Catalog

Publication Information:

Publication Place: Augusta ME
Publisher: Maine Office of Geographic Information Systems (MEGIS)

Other Citation Details: 1:24000
Online Linkage: http://megis.maine.gov/catalog/

Description:

Abstract:
NWILPD contains USFW National Wetland Inventory point data for Maine at 1:24,000 scale, classified using the Cowardin system. This dataset contains ground planimetric coordinates of wetland point features (features too limited to represent as an NWI polygon at 1:24000 scale) in Maine classified using the Cowardin System. For more information on the Cowardin System see L.M.Cowardin, et al, 1979 "Classification of Wetland and Deepwater Habitats of the United States". U.S. Department of the Interior, Fish and Wildlife Service FWS/OBS-79/31. NWILPD data are compiled from color infrared aerial photography and are digitized onto 1:24000 scale base maps by the U.S. Fish and Wildlife Service in St. Petersburg, FL.
Purpose:
NWILPD 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. Users must assume responsibility in determining the usability of this data for their purpose. Data at this scale is suitable for detailed studies and local planning. Not for use in scales greater than 1:24000.
Time Period of Content:

Time Period Information:

Range of Dates/Times:

Beginning Date: 1/1/1948
Beginning Time: Unknown
Ending Date: 12/31/1997
Ending Time: Unknown

Currentness Reference: source publication dates

Status:

Progress: Complete
Maintenance and Update Frequency: None planned

Spatial Domain:

Bounding Coordinates:

West Bounding Coordinate: -70.9901
East Bounding Coordinate: -66.86832
North Bounding Coordinate: 47.32782
South Bounding Coordinate: 43.01631

Keywords:

Theme:

Theme Keyword Thesaurus: Maine GIS Thesaurus-Theme
Theme Keyword: wetlands
Theme Keyword: hydrography
Theme Keyword: land cover
Theme Keyword: water management
Theme Keyword: habitat

Theme:

Theme Keyword Thesaurus: ISO Keyword Thesaurus
Theme Keyword: inlandWaters
Theme Keyword: environment
Theme Keyword: biota
Theme Keyword: imageryBaseMapsEarthCover

Place:

Place Keyword Thesaurus: Maine GIS Thesaurus-Place
Place Keyword: Maine
Place Keyword: United States

Stratum:

Stratum Keyword Thesaurus: GCMD Parameter Keyword
Stratum Keyword: land surface
Stratum Keyword: biosphere
Stratum Keyword: hydrosphere

Access Constraints:
Secondary distribution by permission only. Please see Maine Office of Geographic Information Systems (MEGIS) License Agreement at http://megis.maine.gov/ . Any secondary distribution must have this documentation appended.
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. Users must assume responsibility in determining the usability of this data for their purposes. Digital maps retain the accuracy of their source materials. The best use of data mapped at scales of 1:500,000 and 1:250,000 is in statewide planning and studies; at 1:100,000 in regional planning and studies; at 1:62,500 and 1:24,000 in detailed studies and local planning; and at 1:12,000 and 1:5,000 or larger scales in parcel level studies and detailed local planning. In the use of Maine GIS data, please check sources, scale, accuracy, currentness and other available information. Please confirm that you are using the correct copy of both data and metadata from the Maine GIS Data Catalog. The Maine Office of Geographic Information Systems (MEGIS) provides notice of updates and corrections directly to the Maine GIS Technical Group and Maine GIS Users, through the MEGISTECH and MEGISUSER list servers. To subscribe please contact MeGIS through the Maine Office of Information Technology (OIT) Customer Support Center (CSC) at (207) 624-7700. To request data correction in, or provide updates to Maine GIS data, please use the contact information contained in the metadata. Updates, corrections, and feedback, incorporated in the Maine GIS data

Point of Contact:

Contact Information:

Contact Organization Primary:

Contact Organization: (MEGIS) Maine Office of Geographic Information Systems

Contact Position: GIS Coordinator
Contact Address:

Address Type: mailing address
Address: State House Station 145
City: Augusta
State or Province: ME
Postal Code: 04333-0145
Country: USA

Contact Voice Telephone: (207) 624-7700
Contact Facsimile Telephone: (207) 287-3842
Hours of Service: Monday through Friday 0800 - 1700 EST

Data Set Credit: Credit should always be given to the data source and/or originator when the data is transferred or printed.
Native Data Set Environment:
Maine Office of Information Technology (OIT) Oracle 9i, Maine Office of Geographic Information Systems (MEGIS), Maine GIS SDE, SDEUSER, SDE.DEFAULT, Maine GIS Internet Data Catalog http://megis.maine.gov/catalog/

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:
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). Point topology exists. Data set meets Data Standards for Maine Geographic Information Systems (1990). All points have a single unique user-id number.
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: Data at this scale is suitable for detailed studies and local planning. Not for use in scales greater than 1:24000.
Quantitative Horizontal Positional Accuracy Assessment:

Horizontal Positional Accuracy Value: 12
Horizontal Positional Accuracy Explanation: Horizontal positional accuracy for the digital data is tested by visual comparison of the source with hard copy plots.

Vertical Positional Accuracy:

Vertical Positional Accuracy Report: Not applicable

Lineage:

Source Information:

Source Citation:

Citation Information:

Originator: U.S. Geological Survey (USGS)
Publication Date: 19870101
Publication Time: Unknown
Title: (NAPP) National Aerial Photography Program
Geospatial Data Presentation Form: aerial photograph
Series Information:

Series Name: National Aerial Photography Program
Issue Identification: 1987, 1992, 1997

Publication Information:

Publication Place: Reston VA
Publisher: U.S. Geological Survey

Other Citation Details:
NAPP photography is acquired at 20,000 feet above mean terrain with a 6 inch focal length lens. The flight lines are quarter quad-centered on the 1:24,000-scale USGS maps. NAPP photographs have an approximate scale of 1:40,000, and are flown in black-and-white or color infrared, depending on state or federal requirements. NAPP photography is indexed on 1:100,000-scale USGS maps.
Online Linkage: http://edc.usgs.gov/glis/hyper/guide/napp

Source Scale Denominator: 40000
Type of Source Media: paper and online
Source Time Period of Content:

Time Period Information:

Range of Dates/Times:

Beginning Date: 1/1/1987
Beginning Time: Unknown
Ending Date: Present
Ending Time: Unknown

Source Currentness Reference: publication date

Source Citation Abbreviation: napp
Source Contribution:
In the development of the National Wetlands Inventory (NWI and NWILPD), analysis of National Aerial Photography Program (NAPP) aerial photography and remote sensing data provided wetlands spatial and attribute information.
Source Information:

Source Citation:

Citation Information:

Originator: U.S. Geological Survey (USGS)
Publication Date: 19800101
Publication Time: Unknown
Title: (NHAP) National High Altitude Photography Program
Geospatial Data Presentation Form: aerial photograph
Series Information:

Series Name: National High Altitude Photography Program
Issue Identification: 1980

Publication Information:

Publication Place: Reston VA
Publisher: U.S. Geological Survey

Other Citation Details:
The National High Altitude Photography (NHAP) program was initiated in 1980 and coordinated by the U.S. Geological Survey (USGS) to acquire aerial photography of the 48 conterminous states every five years. This interagency program was designed to eliminate duplicate efforts in various government programs and to maximize the use of government funds to build a uniform archive for multiple uses. In 1987 the program name was changed to the National Aerial Photography Program (NAPP) in recognition of modifications in the user requirements and flight specifications. NHAP photography was acquired at 40,000 feet above mean terrain and flight lines were centered on the 1:24,000-scale USGS map series. Two different camera systems were used; a 6 inch focal length lens was used to acquire black-and-white film at an approximate scale of 1:80,000 and an 8.25 inch lens was used to acquire color-infrared film at an approximate scale of 1:58,000. A duel port camera system was used to acquire simultaneous coverage. NHAP frames are indexed on 1:250,000-scale USGS map sheets.
Online Linkage: http://edc.usgs.gov/glis/hyper/guide/napp

Source Scale Denominator: 60000
Type of Source Media: paper and online
Source Time Period of Content:

Time Period Information:

Range of Dates/Times:

Beginning Date: 1/1/1980
Beginning Time: Unknown
Ending Date: 12/31/1986
Ending Time: Unknown

Source Currentness Reference: publication date

Source Citation Abbreviation: nhap
Source Contribution:
In the development of the National Wetlands Inventory (NWI and NWILPD), analysis of National High Aerial Photography Program (NHAP) aerial photography and remote sensing data provided wetlands spatial and attribute information.
Source Information:

Source Citation:

Citation Information:

Originator: U.S. Department of Agriculture (USDA) Farm Service Agency (FSA)
Publication Date: 1955
Publication Time: Unknown
Title: (APFO) USDA Farm Service Agency Aerial Photography
Geospatial Data Presentation Form: aerial photograph
Series Information:

Series Name: USDA Aerial Photography
Issue Identification: FSA and NRCS

Publication Information:

Publication Place: Salt Lake City UT
Publisher: U.S. Department of Agriculture Farm Service Agency Aerial Photography Field Office

Other Citation Details:
Aerial photography dating from 1955 to the present is currently available through the APFO. The aerial photography libraried at the APFO is primarily in a 9x9" film negative format and covers much of the conterminous United States. Scale of photography 1955-1970 1:20000, 1970 to present 1:40000. Actual flying and photographing of land is done by private companies on a contractual basis. The camera is mounted so that it points straight down from the aircraft. Since the aircraft is constantly affected by wind currents, changing ground elevation, and the motion of the aircraft during flight, the camera is often at an angle off the true vertical. The resulting photo is tilted. This distortion must be compensated for in order to obtain rectified (accurate/true-to-scale) photographs. Correction is accomplished by a system of analytical aerotriangulation which measures known points on a photo and mathematically computes scale and tilt data necessary for scale-accurate photos. The final rectified aerial photograph is, in effect, a photographic map accurately representing ground features. The APFO also retains photographic imagery secured for the Forest Service and Natural Resource and Conservation Service in addition to the Farm Service Agency. Scale of photography varies from 1:6,000 to 1:80,000, all film products are available in black and white contact prints or transparencies. Natural color and color infra-red products are available for some areas.
Online Linkage: http://www.apfo.usda.gov/

Source Scale Denominator: 40000
Type of Source Media: paper
Source Time Period of Content:

Time Period Information:

Range of Dates/Times:

Beginning Date: 1/1/1955
Beginning Time: Unknown
Ending Date: Present
Ending Time: Unknown

Source Currentness Reference: publication date

Source Citation Abbreviation: apfo
Source Contribution:
In the development of the National Wetlands Inventory (NWI and NWILPD), analysis of (APFO) USDA Farm Service Aerial Photography Field Office photos and remote sensing data provided wetlands spatial and attribute information.
Source Information:

Source Citation:

Citation Information:

Originator: U.S. Geological Survey (USGS) EROS Data Center (EDC)
Publication Date: 19820716
Publication Time: Unknown
Title: (LANDSATTM) Landsat Thematic Mapper Imagery
Geospatial Data Presentation Form: remote sensing image
Series Information:

Series Name: National Satellite Land Remote Sensing Data Archive
Issue Identification: LANDSAT

Publication Information:

Publication Place: Sioux Falls SD
Publisher: U.S. Geological Survey EROS Data Center

Other Citation Details:
On July 23, 1972, NASA launched the first in a series of satellites designed to provide repetitive global coverage of the Earth's land masses. When operational orbit was achieved, it was designated ERTS-1(later rename Landsat 1). The satellite ceased to operate on January 6, 1978, more than 5 years after its launch date. The second in this series of Earth resources satellites (designated ERTS-B renamed Landsat 2) was launched January 22, 1975. Three additional Landsats were launched in 1978, 1982, and 1984 (Landsats 3, 4, and 5 respectively). Each successive satellite system had improved sensor and communications capabilities. Landsat data have been used by government, commercial, industrial, civilian, and educational communities in the U.S. and worldwide. They are being used to support a wide range of applications in such areas as global change research, agriculture, forestry, geology, resources management, geography, mapping, water quality, and oceanography. Landsat data have potential applications for monitoring the conditions of the Earth's land surface. The images can be used to map anthropogenic and natural changes on the Earth over periods of several months to more than 15 years. The types of changes that can be identified include agricultural development, deforestation, natural disasters, urbanization, and the development and degradation of water resources. Landsats 4 and 5 carry both the multispectral (MSS) and the thematic mapper (TM) sensors; however, routine collection of MSS data was terminated in late 1992. The MSS and TM sensors primarily detect reflected radiation from the Earth surface in the visible and near-infrared (IR) wavelengths, but the TM sensor provides more radiometric information than the MSS sensor. The TM sensor has a spatial resolution of 30 meters for the visible, near-IR, and mid-IR wavelengths and a spatial resolution of 120 meters for the thermal-IR band. Paths 10 through 13 and Rows 27 through 30 cover Maine.
Online Linkage: http://edc.usgs.gov/Webglis/glisbin/guide.pl/glis/hyper/guide/landsat_tm

Source Time Period of Content:

Time Period Information:

Range of Dates/Times:

Beginning Date: 7/26/1982
Beginning Time: Unknown
Ending Date: Present
Ending Time: Unknown

Source Currentness Reference: publication date

Source Citation Abbreviation: landsattm
Source Contribution:
National Aeronautics and Space Administration (NASA) Landsat system remote sensing imagery was used in analysis of wetlands spatial extent and wetlands classification in the National Wetlands Inventory (NWI and NWILPD).
Source Information:

Source Citation:

Citation Information:

Originator: U.S. Fish & Wildlife Service (USFW)
Publication Date: multiple dates
Publication Time: Unknown
Title: (NWIHRDCPY) National Wetlands Inventory
Geospatial Data Presentation Form: atlas
Series Information:

Series Name: National Wetlands Inventory
Issue Identification: 1979 (hardcopy)

Publication Information:

Publication Place: St. Petersburg FL
Publisher: U.S. Fish & Wildlife Service

Other Citation Details: hardcopy, 1979 to present.

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: 1/1/1979
Beginning Time: Unknown
Ending Date: Present
Ending Time: Unknown

Source Currentness Reference: publication date

Source Citation Abbreviation: nwi
Source Contribution:
U.S. Fish & Wildlife digital wetlands data (NWI and NWILPD) were either manually digitized or scanned from stable-base copies of the 1:24000 scale National Wetlands Inventory map overlays registered to the standard U.S. Geological Survey (USGS) 7.5 minute quadrangles.
Source Information:

Source Citation:

Citation Information:

Originator: U.S. Geological Survey (USGS)
Publication Date: multiple dates
Publication Time: Unknown
Title: (24k) USGS 1:24,000 scale quadrangles
Geospatial Data Presentation Form: map
Series Information:

Series Name: National Mapping Program Standard Series Topographic Maps
Issue Identification: USGS 7.5 Minute Map Series

Publication Information:

Publication Place: Reston VA
Publisher: U.S. Geological Survey

Other Citation Details: 24000 Publication date is unique to each quadrangle in the map series. Standard 7.5x7.5 minute quadrangles cover geographic areas of 49 to 71 square miles. 1 inch at map scale represents 2000 feet.
Online Linkage: http://mapping.usgs.gov/mac/maplists/howtoselectmaps.html

Source Scale Denominator: 24000
Type of Source Media: stable-base material (mylar)
Source Time Period of Content:

Time Period Information:

Range of Dates/Times:

Beginning Date: 1/1/1948
Beginning Time: Unknown
Ending Date: Present
Ending Time: Unknown

Source Currentness Reference: publication date

Source Citation Abbreviation: 24k
Source Contribution: In the development of the National Wetlands Inventory (NWI and NWILPD), U.S. Geological Survey 7.5 minute series was used for base cartographic data.

Source Information:

Source Citation:

Citation Information:

Originator: Cowardin, L.M., V. Carter, F. Golet, and E. LaRoe
Publication Date: 1979
Publication Time: Unknown
Title: (COWARDIN)Classification of Wetland and Deepwater Habitats of the United States
Geospatial Data Presentation Form: atlas
Series Information:

Series Name: US Fish & Wildlife Wetlands Classification
Issue Identification: Cowardin, 1979

Publication Information:

Publication Place: St. Petersburg FL
Publisher: U.S. Fish & Wildlife Service

Other Citation Details:
103 pp. 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).
Source Time Period of Content:

Time Period Information:

Single Date/Time:

Calendar Date: 1979
Time of Day: Unknown

Source Currentness Reference: publication date

Source Citation Abbreviation: cowardin
Source Contribution: NWI and NWILPD digital wetlands data contains polygon, point and line data on wetland features classified using the Cowardin system.

Process Step:

Process Description:
From 1979 to 1994, NWI and NWILPD maps were compiled through manual photointerpretation of NHAP or NAPP aerial photography supplemented by Soil Surveys and field checking of wetland photo signatures. Delineated wetland boundaries were manually transferred from interpreted photos to USGS 7.5 minute topographic quadrangle maps and then manually labeled. Quality control steps occurred throughout the photointerpretation, map compilation, and map reproduction processes.
Source Used Citation Abbreviation: napp
Source Used Citation Abbreviation: 24k
Process Date: 1994
Source Produced Citation Abbreviation: nwi
Process Contact:

Contact Information:

Contact Organization Primary:

Contact Organization: (USFWNWI) US 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: FL
Postal Code: 33702
Country: USA

Process Step:

Process Description:
Digital wetlands data (NWI and NWILPD) are either manually digitized or scanned from stable-base copies of the 1:24,000 scale wetlands overlay 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: nwi
Source Used Citation Abbreviation: cowardin
Process Date: 198110
Process Contact:

Contact Information:

Contact Organization Primary:

Contact Organization: (USFWNWI) US 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: FL
Postal Code: 33702
Country: USA

Process Step:

Process Description:
The Maine Office of GIS completed the conversion of all final data layers from NAD27 to NAD83 in July 1999. All the data layers were converted using the ArcInfo (version 7.2.1) NADCON conversion and the "project" command. All data was copied to double precision, projected to NAD83, and then copied back to single precision. It was decided to keep the NAD27 quad structure instead of generating new quad boundaries from NAD83 coordinates - all indexes (quads) were projected to NAD83 by using the same process previously described. All MEGIS data libraries in ArcInfo Librarian were repopulated using the NAD83 indexes and data.
Process Date: 19990701
Process Contact:

Contact Information:

Contact Organization Primary:

Contact Organization: (MEGIS) Maine Office of Geographic Information Systems

Contact Position: GIS Coordinator
Contact Address:

Address Type: mailing address
Address: State House Station 145
City: Augusta
State or Province: ME
Postal Code: 04333-0145
Country: USA

Contact Voice Telephone: (207) 624-7700
Contact Facsimile Telephone: (207) 287-3842
Hours of Service: Monday through Friday 0800 - 1700 EST

Cloud Cover: 0

Direct Spatial Reference Method: Vector
Point and Vector Object Information:

SDTS Terms Description:

SDTS Point and Vector Object Type: Entity point
Point and Vector Object Count: 7840

Horizontal Coordinate System Definition:

Planar:

Grid Coordinate System:

Grid Coordinate System Name: Universal Transverse Mercator 1983
Universal Transverse Mercator:

UTM Zone Number: 19
Transverse Mercator:

Scale Factor at Central Meridian: 0.9996
Longitude of Central Meridian: -69
Latitude of Projection Origin: 0
False Easting: 500000
False Northing: 0

Planar Coordinate Information:

Planar Coordinate Encoding Method: Coordinate Pair
Coordinate Representation:

Abscissa Resolution: 1
Ordinate Resolution: 1

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: 298.257

Detailed Description:

Entity Type:

Entity Type Label: NWILPD
Entity Type Definition: point feature class
Entity Type Definition Source: Environmental Systems Research Institute, Inc. (ESRI)

Attribute:

Attribute Label: ATTRIBUTE
Attribute Definition: classification of the wetland (All codes for SYSTEM and SUBSYSTEM, CLASS and SUBCLASS, along with any applicable modifiers are concatenated here.)
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:

Attribute Label: CLASS and SUBCLASS
Attribute Definition: secondary classification of wetland types (upper case only)
Attribute Domain Values:

Enumerated Domain:

Enumerated Domain Value: US
Enumerated Domain Value Definition: Unconsolidated Shore-1 cobble-gravel, 2 sand, 3 mud, 4 organic, 5 vegetated
Enumerated Domain Value: UB
Enumerated Domain Value Definition: Unconsolidated Bottom-1 cobble-gravel, 2 sand, 3 mud, 4 organic
Enumerated Domain Value: SS
Enumerated Domain Value Definition: Scrub Shrub-1 broad leaved deciduous, 2 needle leaved deciduous, 3 broad leaved evergreen, 4 needle leaved evergreen, 5 dead, 6 deciduous, 7 evergreen
Enumerated Domain Value: SB
Enumerated Domain Value Definition: Streambed-1 bedrock, 2 rubble, 3 cobble-gravel, 4 sand, 5 mud, 6 organic, 7 vegetated
Enumerated Domain Value: RS
Enumerated Domain Value Definition: Rocky Shore-1 bedrock, 2 rubble
Enumerated Domain Value: RF
Enumerated Domain Value Definition: Reef-1 coral, 2 mollusc, 3 worm
Enumerated Domain Value: RB
Enumerated Domain Value Definition: Rock Bottom-1 bedrock, 2 rubble
Enumerated Domain Value: OW
Enumerated Domain Value Definition: Open Water-no modifiers
Enumerated Domain Value: ML
Enumerated Domain Value Definition: Moss Lichen-1 moss, 2 lichen
Enumerated Domain Value: FO
Enumerated Domain Value Definition: Forested Wetland-1 broad leaved deciduous, 2 needle leaved deciduous, 3 broad leaved evergreen, 4 needle leaved evergreen 5 dead, 6 deciduous, 7 evergreen
Enumerated Domain Value: EM
Enumerated Domain Value Definition: Emergent Wetland-1 persistent, 2 nonpersistent
Enumerated Domain Value: AB
Enumerated Domain Value Definition: Aquatic Bed-1 algal, 2 aquatic moss, 3 rooted vascular, 4 floating vascular, 5 unknown submergent, 6 unknown surface

Attribute:

Attribute Label: COASTAL HALINITY
Attribute Definition: coastal water chemistry modifiers
Attribute Domain Values:

Enumerated Domain:

Enumerated Domain Value: 0
Enumerated Domain Value Definition: fresh
Enumerated Domain Value: 1
Enumerated Domain Value Definition: hyperhaline
Enumerated Domain Value: 2
Enumerated Domain Value Definition: euhaline
Enumerated Domain Value: 3
Enumerated Domain Value Definition: mixohaline
Enumerated Domain Value: 4
Enumerated Domain Value Definition: polyhaline
Enumerated Domain Value: 5
Enumerated Domain Value Definition: mesohaline
Enumerated Domain Value: 6
Enumerated Domain Value Definition: oligohaline

Attribute:

Attribute Label: INLAND SALINITY
Attribute Definition: inland water chemistry modifiers
Attribute Domain Values:

Enumerated Domain:

Enumerated Domain Value: 0
Enumerated Domain Value Definition: fresh
Enumerated Domain Value: 7
Enumerated Domain Value Definition: hypersaline
Enumerated Domain Value: 8
Enumerated Domain Value Definition: eusaline
Enumerated Domain Value: 9
Enumerated Domain Value Definition: mixosaline

Attribute:

Attribute Label: NONTIDAL
Attribute Definition: nontidal water regime modifiers (upper case only)
Attribute Domain Values:

Enumerated Domain:

Enumerated Domain Value: A
Enumerated Domain Value Definition: temporarily flooded
Enumerated Domain Value: B
Enumerated Domain Value Definition: saturated
Enumerated Domain Value: C
Enumerated Domain Value Definition: seasonally flooded
Enumerated Domain Value: D
Enumerated Domain Value Definition: seasonally flooded well drained
Enumerated Domain Value: E
Enumerated Domain Value Definition: seasonally flooded saturated
Enumerated Domain Value: F
Enumerated Domain Value Definition: semipermanently flooded
Enumerated Domain Value: G
Enumerated Domain Value Definition: intermittently exposed
Enumerated Domain Value: H
Enumerated Domain Value Definition: permanently flooded
Enumerated Domain Value: J
Enumerated Domain Value Definition: intermittently flooded
Enumerated Domain Value: K
Enumerated Domain Value Definition: artificially flooded
Enumerated Domain Value: U
Enumerated Domain Value Definition: unknown tidal
Enumerated Domain Value: W
Enumerated Domain Value Definition: intermittently flooded
Enumerated Domain Value: Y
Enumerated Domain Value Definition: saturated semipermanent seasonal
Enumerated Domain Value: Z
Enumerated Domain Value Definition: intermittently exposed permanent

Attribute:

Attribute Label: PH
Attribute Definition: fresh water pH modifiers (lower case only)
Attribute Domain Values:

Enumerated Domain:

Enumerated Domain Value: t
Enumerated Domain Value Definition: circumneutral
Enumerated Domain Value: i
Enumerated Domain Value Definition: alkaline
Enumerated Domain Value: a
Enumerated Domain Value Definition: acid

Attribute:

Attribute Label: SOIL
Attribute Definition: soil modifiers (lower case only)
Attribute Domain Values:

Enumerated Domain:

Enumerated Domain Value: n
Enumerated Domain Value Definition: mineral
Enumerated Domain Value: g
Enumerated Domain Value Definition: organic

Attribute:

Attribute Label: SPECIAL
Attribute Definition: special modifiers (lower case only)
Attribute Domain Values:

Enumerated Domain:

Enumerated Domain Value: x
Enumerated Domain Value Definition: excavated
Enumerated Domain Value: s
Enumerated Domain Value Definition: spoil
Enumerated Domain Value: r
Enumerated Domain Value Definition: artificial substrate
Enumerated Domain Value: h
Enumerated Domain Value Definition: diked impounded
Enumerated Domain Value: f
Enumerated Domain Value Definition: farmed
Enumerated Domain Value: d
Enumerated Domain Value Definition: partially drained ditched
Enumerated Domain Value: b
Enumerated Domain Value Definition: beaver

Attribute:

Attribute Label: SYSTEM and SUBSYSTEM
Attribute Definition: primary classification of wetland types (upper case only)
Attribute Domain Values:

Enumerated Domain:

Enumerated Domain Value: R
Enumerated Domain Value Definition: Riverine-1 tidal, 2 lower-perennial, 3 upper-perennial, 4 intermittent, 5 unknown perennial
Enumerated Domain Value: P
Enumerated Domain Value Definition: Palustrine-no modifiers
Enumerated Domain Value: M
Enumerated Domain Value Definition: Marine-1 subtidal, 2 intertidal
Enumerated Domain Value: L
Enumerated Domain Value Definition: Lacustrine-1 limnetic, 2 littoral
Enumerated Domain Value: E
Enumerated Domain Value Definition: Estuarine-1 subtidal, 2 intertidal

Attribute:

Attribute Label: TIDAL
Attribute Definition: tidal water regime modifiers (upper case only)
Attribute Domain Values:

Enumerated Domain:

Enumerated Domain Value: V
Enumerated Domain Value Definition: permanent tidal
Enumerated Domain Value: U
Enumerated Domain Value Definition: unknown
Enumerated Domain Value: T
Enumerated Domain Value Definition: semipermanent tidal
Enumerated Domain Value: S
Enumerated Domain Value Definition: temporary tidal
Enumerated Domain Value: R
Enumerated Domain Value Definition: seasonal tidal
Enumerated Domain Value: P
Enumerated Domain Value Definition: irregularly flooded
Enumerated Domain Value: N
Enumerated Domain Value Definition: regularly flooded
Enumerated Domain Value: M
Enumerated Domain Value Definition: irregularly exposed
Enumerated Domain Value: L
Enumerated Domain Value Definition: subtidal
Enumerated Domain Value: K
Enumerated Domain Value Definition: artificially flooded

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).
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. For more information on the Cowardin System see L.M.Cowardin, et al, 1979 "Classification of Wetland and Deepwater Habitats of the United States". U.S. Department of the Interior, Fish and Wildlife Service FWS/OBS-79/31 <http://www.nwi.fws.gov/Pubs_Reports/Class_Manual/class_titlepg.htm>
The ArcView shapefile and ArcGIS geodatabase formats, commonly used for Maine GIS data, carry default identifiers and attributes that are software generated and/or important for internal recordkeeping. These are listed here to avoid repetition for every layer, and may not be repeated in the attribute descriptions and definitions of each layer. Common software generated identifiers and attributes in Maine GIS data include: FID (feature identifier), Shape (feature geometry), OBJECTID and SHAPE_lengt. In addition, most GIS formats will carry fields for PERIMETER, AREA and/or LENGTH according to feature geometry. These fields are typically available by default, with the units based on coordinate system or projection units of GIS data. Most GIS software packages also provide a means to calculate these values. It is important to test any columns containing PERIMETER, AREA or LENGTH values before using them for analysis purposes. These important values can be carried from format to format and become out-dated. Verify that the values are correct. Also, in your GIS software, please view the properties of data layers for the map units used to calculate these fields, and for the units set for display purposes.

Overview Description:

Entity and Attribute Detail Citation: U.S. Fish & Wildlife Service, Photointerpretation Conventions for the Nationa Wetlands Inventory, March 1990.

Distributor:

Contact Information:

Contact Organization Primary:

Contact Organization: (MEGIS) Maine Office of Geographic Information Systems

Contact Position: GIS Coordinator
Contact Address:

Address Type: mailing address
Address: State House Station 145
City: Augusta
State or Province: ME
Postal Code: 04333-0145
Country: USA

Contact Voice Telephone: (207) 624-7700
Contact Facsimile Telephone: (207) 287-3842
Hours of Service: Monday through Friday 0800 - 1700 EST

Distribution Liability:
Users must assume responsibility to determine the usability of this data for their purposes. Although these data have been processed successfully on a computer system at the Maine Office of Geographic Information Systems, no warranty expressed or implied is made by MEGIS regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. Neither the Maine Office of Geographic Information Systems, nor any of its contributors, is liable for misuse of the data, for damage, for transmission of viruses, or for computer contamination through the distribution of these data sets.
Standard Order Process:

Digital Form:

Digital Transfer Information:

Format Name: ESRI Shapefile
Format Version Number: ARC Version 9.x
Format Specification: ArcView Shapefile Format
Format Information Content:
MEGIS has made all vector layers, in the Maine GIS Internet Data Catalog, available in ESRI's ArcView shapefile format. A shapefile is a simple non-topological format that stores the geometry and attribute information for a set of geographic features as a set of vector (point, line, polygon) coordinates. Shapefiles draw quickly and directly in ArcView, ArcGIS, ArcExplorer. Shapefiles are a compatible data type for many other types of GIS software. Three files are fundamental to each shapefile: .shp stores the feature geometry (shape and location information); .shx stores the index of the feature geometry; .dbf a dBASE (TM) file stores the attribute information for the features. Other index files may be created to help speed analysis and query: these file formats are .sbn .sbx .ain .aix .fbn and .fbx. In addition you may find projection .prj, and metadata .xml, files associated with shapefiles.
File Decompression Technique:
Data available from this website is in .zip compressed format. WinZip is a Windows based, PKZip-compatible compression utility. You will need a program like this to extract the data. A link to a trial copy WinZip software is available at http://megis.maine.gov/links/.
Digital Transfer Option:

Online Option:

Computer Contact Information:

Network Address:

Network Resource Name: http://megis.maine.gov/catalog/

Access Instructions:
These data are available to Internet browsers for download from the Maine GIS Internet Data Catalog. Data available from this website is in .zip compressed format. WinZip is a Windows based, PKZip-compatible compression utility. You will need a program like this to extract the data. A link to a trial copy WinZip software is available at http://megis.maine.gov/links/. If you are not already a GIS user, free software for viewing these files is available from Environmental Systems Research Institute, Inc. (ESRI). See http://megis.maine.gov/links/ for a link to ArcExplorer 9.x .
Digital Transfer Option:

Online Option:

Access Instructions: Where file size and Internet access permit, data requests can be made available via File Transfer Protocol (FTP).

Fees: Data may be downloaded from Maine GIS Internet Data Catalog at no charge.
Turnaround: Data is available for immediate download from the Maine GIS Internet Data Catalog.

Standard Order Process:

Distributor:

Contact Information:

Contact Organization Primary:

Contact Organization: (MEGIS) Maine Office of Geographic Information Systems

Contact Position: GIS Coordinator
Contact Address:

Address Type: mailing address
Address: State House Station 145
City: Augusta
State or Province: ME
Postal Code: 04333-0145
Country: USA

Contact Voice Telephone: (207) 624-7700
Contact Facsimile Telephone: (207) 287-3842
Hours of Service: Monday through Friday 0800 - 1700 EST

Distribution Liability: Users must assume responsibility to determine the usability of this data for their purposes.
Standard Order Process:

Digital Form:

Digital Transfer Information:

Format Name: ARCSDE
Format Version Number: ArcSDE 9.x
Format Information Content: Oracle 9i

Digital Transfer Option:

Online Option:

Access Instructions: Please contact the Maine Office of GIS (MEGIS) for access instructions.

Fees: Access is available through Maine's wide area network; WAN users may contact the Maine Office of Information Technology, Maine Office of Geographic Information Systems (MEGIS) for a login.

Metadata Date: 7/11/1995
Metadata Review Date: 9/25/2007
Metadata Future Review Date:
Metadata Contact:

Contact Information:

Contact Organization Primary:

Contact Organization: Maine Office of Geographic Information Systems

Contact Position: GIS Coordinator
Contact Address:

Address Type: mailing address
Address: State House Station 145
City: Augusta
State or Province: ME
Postal Code: 04333-0145
Country: USA

Contact Voice Telephone: 207 624-7700
Contact Facsimile Telephone: 207 287-4563
Hours of Service: Monday through Friday 0800 - 1700 EST

Metadata Standard Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata Standard Version: FGDC-STD-001-1998