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Hydrography - Major Areas [Washington (State)]

Earth Science Information Center, U.S. Geological Survey Full Details

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Title
Hydrography - Major Areas [Washington (State)]
Description
NHD_MajorAreas are a subset of the largest double banked stream/river polygon features selected from the High Resolution NHD dataset for Washington State. This subset includes only NHDAreas that have an associated NHD_MajorStream. NHD_MajorStreams are classified as those that have GNIS Names that include "River", or have a Stream Order > 7, or have a GNIS Name that includes "Creek" and is longer than 24 km. NHD_MajorAreas have an NHD_MajorStream flowing through it.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. This high-resolution NHD, generally developed at 1:12,000/1:24,000 scale, adds detail to the original 1:100,000-scale NHD. Local resolution NHD is being developed where partners and data exist. The NHD contains reach codes for networked features, flow direction, names, and centerline representations for areal water bodies. Reaches are also defined on 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 established by the Federal Geographic Data Committee.
Creator
Earth Science Information Center, U.S. Geological Survey
Temporal Coverage
Last modified 2024-08-20
Date Issued
2023-04-11
Rights
None. Acknowledgment of the originating agencies would be appreciated in products derived from these data.
Access Rights
Public
Format
Shapefile
Language
English
Date Added
March 07, 2025

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Cite and Reference

  • Citation
    Earth Science Information Center, U.S. Geological Survey (2023). Hydrography - Major Areas [Washington (State)]. . https://geo.wa.gov/datasets/waecy::hydrography-major-areas (dataset)
  • BTAA Geoportal Link

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