NWI digital data files are records of wetlands location and classification as developed by the U.S. Fish & Wildlife Service. The classification system was adopted as a national classification standard in 1996 by the Federal Geographic Data Committee.

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Download Seamless MS Statewide Wetlands Data shapefile:

Sept. 2011 Update – 1.17GB: MS_shapefile_wetlands.zip
Status Map – NWI_Status.gif

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For more information go to thw USFWS National Wetlands Inventory page:
USFWS NWI Webpage