Watershed Boundary Dataset (WBD) - USGS National Map Downloadable Data Collection

Metadata Updated: December 1, 2020

The Watershed Boundary Dataset (WBD) from The National Map (TNM) is a seamless, national hydrologic unit (HU) dataset. A HU defines the areal extent of surface water drainage to an outlet point on a dendritic stream network or to multiple outlet points where the stream network is not dendritic. A HU may represent all or only part of the total drainage area to an outlet point so that multiple HU may be required to define the entire drainage area at a given outlet. Hydrologic unit boundaries in the WBD are determined based on topographic, hydrologic, and other relevant landscape characteristics without regard for administrative, political, or jurisdictional boundaries. The WBD seamlessly represents hydrologic units at six required and two optional hierarchical levels. The HU in the WBD are arranged in a nested, hierarchical system with each HU in the system identified using a unique code. Hydrologic unit codes (HUC) are developed using a progressive two-digit system where each successively smaller areal unit is identified by adding two digits to the identifying code the smaller unit is nested within. WBD contains eight levels of progressive hydrologic units identified by unique 2- to 16-digit codes. The dataset is complete for the United States to the 12-digit hydrologic unit. The 14- and 16-digit hydrologic units are optional and are not complete for the nation. For additional information on NHD, go to https://www.usgs.gov/core-science-systems/ngp/national-hydrography.

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Metadata Date November 13, 2020
Metadata Created Date December 18, 2014
Metadata Updated Date December 1, 2020
Reference Date(s) January 1, 2020 (publication)
Frequency Of Update irregular

Metadata Source

Harvested from USGS National Watershed Boundary Dataset (WBD) Downloadable Data Collection

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Additional Metadata

Resource Type Dataset
Metadata Date November 13, 2020
Metadata Created Date December 18, 2014
Metadata Updated Date December 1, 2020
Reference Date(s) January 1, 2020 (publication)
Responsible Party U.S. Geological Survey, National Geospatial Technical Operations Center (Point of Contact)
Contact Email
Access Constraints Use Constraints: None. However, users should be aware that temporal changes may have occurred since this dataset was collected and that some parts of this data may no longer represent actual conditions. Users should not use this data for critical applications without a full awareness of its limitations. Acknowledgment of the U.S. Geological Survey would be appreciated for products derived from these data., Access Constraints: None
Bbox East Long 179.856674735386
Bbox North Lat 71.4395725901531
Bbox South Lat -14.4246950942767
Bbox West Long -179.229655487448
Collection Metadata true
Coupled Resource
Frequency Of Update irregular
Graphic Preview Description Thumbnail JPG image
Graphic Preview File https://thor-f5.er.usgs.gov/ngtoc/metadata/waf/collections/browse/wbd.jpg
Graphic Preview Type JPEG
Harvest Object Id 08582fd8-6584-4d5b-8c05-414ba9075d12
Harvest Source Id 0cf556d1-7c2d-4dd2-b0f2-51b7a25a2680
Harvest Source Title USGS National Watershed Boundary Dataset (WBD) Downloadable Data Collection
Licence Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty.
Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 2014-01-01

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