U.S. Fish & Wildlife ServiceThis dataset represents salt marsh communities in the Northeast Atlantic coast. The classification was produced using a combination of Digital Elevation Model (DEM) and National Agriculture Imagery Program (NAIP) multispectral imagery. This dataset is a simplified version of " Tidal Marsh Vegetation Classification, DEM, 3m, Northeast U.S. " This simplified version includes four of the original eight distinct cover/community types (High marsh, Low marsh, Salt pools/pannes, Terrestrial border, Phragmites, Mudflat, Open water, and Upland). The four classes included in this dataset are 1. High marsh: Area flooded during spring tides related to the lunar cycle and dominated by Spartina patens, Distichlis spicata, Juncus gerardii, and short form Spartina alterniflora. Other species include Juncus roemerianus, Scirpus pungens, Scirpus robustus, Limonium nashii, Aster tenuifolius, and Triglochin maritima 2. Low marsh: Area flooded regularly by daily tides and dominated by tall form Spartina alterniflora 3. Mudflat: Exposed muddy areas free of vegetation and 4. Phragmites australis: A species of considerable management interest due to the invasive nature of an introduced form, especially in marshes with freshwater input, upland development, and/or increased nutrients. Detailed zone descriptions, accuracy estimates for each cover type, and data limitation details are provided in this white paper . For more information about the development of the data please contact Mo Correll at maureen_correll@fws.gov. The complete original set of data are as follows: "Tidal Marsh Vegetation Classification, DEM, 3m, Northeast U.S.", "Tidal Marsh Vegetation Classification, no DEM, 3m, Northeast U.S.", and "DEM Difference in Tidal Marsh Vegetation Classification, 3m, Northeast U.S." and are products of the Saltmarsh Habitat and Avian Research Program (www.tidalmarshbirds.org) and can all be downloaded here .ArcGIS ImageMapLayerhttps://hub.arcgis.com/datasets/20c9ecd72283468091a02c031aab216bengU.S. Fish and Wildlife Service Open DataPublicTidal Marsh Vegetation Classification, Simplified Four Classes, DEM 3m, Northeast U.S. [United States]Web servicesUnited StatesLast Modified: 2025-08-18