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

    National Hydrography Dataset

    Metadata Updated: January 31, 2025

    The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface water drainage system. NHD data was originally developed at 1:100,000 scale and exists at that scale for the whole country. High resolution NHD adds detail to the original 1:100,000-scale NHD. (Data for Alaska, Puerto Rico and the Virgin Islands was developed at high-resolution, not 1:100,000 scale.) Like the 1:100,000-scale NHD, high resolution NHD contains reach codes for networked features and isolated lakes, flow direction, names, stream level, and centerline representations for areal water bodies. Reaches are also defined to represent waterbodies and the approximate shorelines of the Great Lakes, the Atlantic and Pacific Oceans and the Gulf of Mexico. The NHD also incorporates the National Spatial Data Infrastructure framework criteria set out by the Federal Geographic Data Committee.

    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 January 19, 2024
    Metadata Updated Date January 31, 2025

    Metadata Source

    Harvested from oregon json

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date January 19, 2024
    Metadata Updated Date January 31, 2025
    Publisher U.S. Geological Survey
    Maintainer
    Identifier https://www.arcgis.com/home/item.html?id=ee639dd78b50480c988788f66cd82b9f
    Data First Published 2024-01-18
    Data Last Modified 2024-01-18
    Category geospatial
    Public Access Level public
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://data.oregon.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 27c10be9-8ce9-4150-b884-8d619c914b60
    Harvest Source Id d747cd8f-d1d6-49a3-ab0b-ea17684f1121
    Harvest Source Title oregon json
    Homepage URL https://geohub.oregon.gov/maps/oregon-geo::national-hydrography-dataset
    Metadata Type geospatial
    Old Spatial -179.2297,-14.4247,179.8567,71.4996
    Source Datajson Identifier True
    Source Hash 7bd009c518ae9f6e1334e15ad4aecefec45ed5d669f7d7bfbc1aee947eacda8a
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -179.2297, -14.4247, -179.2297, 71.4996, 179.8567, 71.4996, 179.8567, -14.4247, -179.2297, -14.4247}

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