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GIS Resources

When describing the baseline conditions of an action area in a consultation, it is important to use site-specific data wherever possible. In addition to the resources found on our website, the following table is a compilation of resources that are free and available to the general public. General categories of the layers are listed below; the variety of specific GIS layers and their level of detail differ by state. Please visit the websites or contact the referenced agencies for the most up-to-date and detailed information. These agencies are responsible for the accuracy and quality of the data they provide. When referencing information from these maps during a consultation, please include an appropriate citation.

 

Categories of available data may include, but are not limited to:

Physical Structures: presence of dams, shoreline structures, and/or permitted or proposed aquaculture sites

Biological Features: shellfish beds, SAV, and/or wetland/marshes

Physical Features: benthic habitat, sediment, dissolved oxygen, and/or salinity/head of tide

Discharge: storm water discharge, general permit holders, Total Maximum Daily Loads (TMDL), and/or Combined Sewer Overflows (CSO)

State Agency Providing Data Categories of Layers Available Location
Maine Maine Office of GIS Biological Features http://www.maine.gov/megis/maps/
New Hampshire New Hampshire Statewide Geographic Information System Physical Structures
Biological Features
http://www.granit.unh.edu/
Massachusetts Massachusetts Office of Geographic Information Biological Features
Discharge
http://maps.massgis.state.ma.us/map_ol/oliver.php
Rhode Island Rhode Island Department of Environmental Management Physical Structures
Biological Features
Discharge
http://www.dem.ri.gov/maps/
Connecticut Connecticut Department of Energy and Environmental Protection Physical Structures
Biological Features
Physical Features
http://www.ct.gov/deep/cwp/view.asp?a=2701&q=323444&deepNav_GID=1636
New York New York State Department of Environmental Conservation Physical Structures
Biological Features
Discharge
http://gis.ny.gov/gisdata/
New Jersey State of New Jersey Department of Environmental Protection Biological Features
Discharge
http://www.state.nj.us/dep/gis/stateshp.html
Pennsylvania Pennsylvania Spatial Data Access Physical Structures
Biological Features
Discharge
http://www.pasda.psu.edu/
Delaware State of Delaware Biological Features
Physical Structures
http://opendata.firstmap.delaware.gov/
Maryland State of Maryland Geographic Information Office Physical Structures
Biological Features
Physical Features
Discharge
http://imap.maryland.gov/Pages/data.aspx
Chesapeake Bay Chesapeake Bay Program Biological Features http://www.chesapeakebay.net/maps
Washington, D.C. District of Columbia Open Data Biological Features http://opendata.dc.gov/
Virginia Virginia Institute of Marine Science at the College of William and Mary Biological Features
Physical Features
Discharge
https://data.virginia.gov/

 

Updated February 1, 2017