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National Wetlands Inventory (Polygons)

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Abstract: This data set represents the extent, approximate location and type of wetlands and deepwater habitats in the Commonwealth of Massachusetts. These data delineate the areal extent of wetlands and surface waters as defined by Cowardin et al. (1979). The dataset was created by the National Wetlands Inventory program ( within the U.S. Fish & Wildlife Service. Certain wetland ... View entire text

Purpose: The present goal of the Service is to provide the citizens of the United States and its Trust Territories with current geospatially referenced information on the status, extent, characteristics and functions of wetlands, riparian, deepwater and related aquatic habitats in priority areas to promote the understanding and conservation of these resources.

SUPPLEMENTAL INFORMATION: The wetland maps ... View entire text
Geographic Coverage
Spatial coordinates   
  N: 42.96   S: 41.22   E: -69.88   W: -73.58

Data Set Citation
Dataset Originator/Creator: U.S. Fish and Wildlife Service
Dataset Title: National Wetlands Inventory (Polygons)
Dataset Series Name: Classification of Wetlands and Deepwater Habitats of the United States. U.S. DOI, Fish and Wildlife Service, Washington, DC. FWS/OBS-79/31.
Dataset Release Date: 2006-10-01
Dataset Release Place: Washington, D.C.
Dataset Publisher: U.S. Fish and Wildlife Service, Division of Habitat and Resouce Conservation
Data Presentation Form: vector digital data
Online Resource:
Temporal Coverage
Start Date: 1977-01-01
Data Resolution
Vertical Resolution: 1.000000
ISO Topic Category
Quality ATTRIBUTE ACCURACY REPORT: The source data was checked using standard review procedures. Attributes were checked by using visual inspection as well as automated verification routines. Quality of the attribute information varies with age and mapping protocols used when individual maps were prepared

LOGICAL CONSISTENCY REPORT: Polygon and chain-node topology are present. Every polygon ... View entire text
Access Constraints ACCESS CONSTRAINTS: None

DISTRIBUTION LIABILITY: Although these data have been processed successfully on a computer system at the U.S. Fish and Wildlife Service, no warranty expressed or implied is made by the U.S. Fish and Wildlife Service regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. No responsibility is assumed by the U.S. Fish and Wildlife Service in the use of these data.
Use Constraints USE CONSTRAINTS: None. Acknowledgement of the U.S. Fish and Wildlife Service and (or) the National Wetlands Inventory would be appreciated in products derived from these data

FEES: There is no charge for the online option. Requests for large amounts of data are handled on a cost reimbursable basis.
Data Set Progress
Data Center
Massachusetts Office of Geographic and Environmental Information Supplemental Info
Data Center URL:
Dataset ID: Downloadable Data

Data Center Personnel
Phone: (617) 626-1195
Fax: (617) 626-1249
Email: at
Contact Address:
251 Causeway Street
Suite 500
City: Boston
Province or State: MA
Postal Code: 02114
Country: USA
Distribution Size: 142.822
Distribution Format: ESRI Shapefile or Personal Geodatabase
Fees: See Use Constraints.
Phone: 608 783 8425
Email: tom_dahl at
Contact Address:
National Wetlands Inventory
U.S. Fish and Wildlife Service
505 Science Drive
City: Madison
Province or State: WI
Postal Code: 53711-1060
Country: USA
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2007-11-01
Last DIF Revision Date: 2017-08-24