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    • NCRN Hemlock Inventory Data

    Metadata Updated: January 25, 2026

    ​Data associated with the 2015 hemlock inventory project in NCR.

    Eastern hemlock (Tsuga canadensis) is a coniferous tree native to the NE and Appalachian regions of the US, with some disjunct populations in the SE US. Eastern hemlock is shade tolerant, long-lived, and slow-growing. It is usually restricted to steep terrain on north facing slopes adjacent to streams, but is also frequently planted in urban and suburban areas, where it grows well outside its natural habitat. Eastern Hemlock has become increasingly uncommon due to impacts from exotic insects: Hemlock Woolly Adelgid (Adelges tsugae) and Elongate Hemlock Scale (Fiorinia externa). As a result of impacts from these insects, as well as impacts from a changing climate, Eastern hemlock is one of the most threatened species of conifers in the Mid-Atlantic.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Created Date January 14, 2026
    Metadata Updated Date January 25, 2026

    Metadata Source

    Harvested from DOI NPS DCAT-US

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date January 14, 2026
    Metadata Updated Date January 25, 2026
    Publisher National Park Service
    Maintainer
    Identifier http://datainventory.doi.gov/id/dataset/NPS_DataStore_2225011
    Data First Published 2015-11-01T00:00:00Z
    Data Last Modified 2015-11-01T00:00:00Z
    Category Generic Dataset
    Public Access Level public
    Bureau Code 010:24
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://ddi.doi.gov/nps-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 3fae7b69-5c17-4e9c-a4e6-b11301b33415
    Harvest Source Id d917c1a9-26b7-43ea-b8c5-c77ec750a850
    Harvest Source Title DOI NPS DCAT-US
    Homepage URL https://irma.nps.gov/DataStore/Reference/Profile/2225011
    Old Spatial -80,38.25,-76.2,40
    Program Code 010:118, 010:119
    Source Datajson Identifier True
    Source Hash 19143172d1b5bab50293637791ae56debf94f0142ae0499e724557a1f193a06b
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -80, 38.25, -80, 40, -76.2, 40, -76.2, 38.25, -80, 38.25}
    Temporal 2015-06-01/2015-08-01

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