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    • This is a Non-Federal dataset covered by different Terms of Use than Data.gov.

    Wetlands - National Wetlands Inventory

    Metadata Updated: April 5, 2026

    This data set represents the extent, approximate location and type of wetlands and deepwater habitats in the conterminous United States. These data delineate the areal extent of wetlands and surface waters as defined by Cowardin et al. (1979). Certain wetland habitats are excluded from the National mapping program because of the limitations of aerial imagery as the primary data source used to detect wetlands. These habitats include seagrasses or submerged aquatic vegetation that are found in the intertidal and subtidal zones of estuaries and near shore coastal waters. Some deepwater reef communities (coral or tuberficid worm reefs) have also been excluded from the inventory. These habitats, because of their depth, go undetected by aerial imagery. By policy, the Service also excludes certain types of "farmed wetlands" as may be defined by the Food Security Act or that do not coincide with the Cowardin et al. definition. Contact the Service's Regional Wetland Coordinator for additional information on what types of farmed wetlands are included on wetland maps. Last Updated: 1992

    Access & Use Information

    Public: This dataset is intended for public access and use. Non-Federal: This dataset is covered by different Terms of Use than Data.gov. License: No license information was provided.

    Downloads & Resources

    Dates

    Metadata Created Date July 26, 2025
    Metadata Updated Date April 5, 2026

    Metadata Source

    Harvested from md json

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date July 26, 2025
    Metadata Updated Date April 5, 2026
    Publisher opendata.maryland.gov
    Maintainer
    Identifier https://opendata.maryland.gov/api/views/6ayq-shsb
    Data First Published 2025-07-22
    Data Last Modified 2026-04-01
    Public Access Level public
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://opendata.maryland.gov/data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id 508d95b4-b949-4fbd-923d-cf09c5b8ac65
    Harvest Source Id ee165ef5-7b35-41a7-b3a5-5479c71b0e58
    Harvest Source Title md json
    Homepage URL https://opendata.maryland.gov/d/6ayq-shsb
    Source Datajson Identifier True
    Source Hash 7791b8b714ce989ccb5acebb175bf13bdcd0113ada74c1065530b1467c468ce2
    Source Schema Version 1.1

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