USGS WBD standards version 5 now available
The 5th Edition of the Federal Standards and Procedures for the National Watershed Boundary Dataset (WBD) has been released.
The USGS is pleased to announce the release of the 5th Edition of the Federal Standards and Procedures for the National Watershed Boundary Dataset (WBD). The WBD is a seamless, national hydrologic unit dataset for the Nation.
Hydrologic unit boundaries in the WBD are determined on the basis of topographic, hydrologic, and other relevant landscape characteristics. This comprehensive document provides guidance and specifications for delineation and attribution of the hydrologic units in the WBD.
The 5th edition represents a complete revision of the 4th edition report contents and includes a number of significant changes including, but not limited to, revisions to figures, the addition of new guidance on development of 14- and 16-digit hydrologic units, updated Line Source and Hydrologic Unit modification domains, and retirement of outdated material. While this document is a revision to the existing standards for the WBD, it does not include explicit guidance to address emerging technologies, such as deriving data from high resolution elevation data. The 5th Edition, and all previous versions of the Federal Standards and Procedures for the National Watershed Boundary Dataset (WBD), can be accessed here. Please relay any questions to the WBD Points of Contact Kimberly Jones (kjones@usgs.gov), Lily Niknami (lniknami@usgs.gov), and Drew Decker (ddecker@usgs.gov).
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The National Hydrography Dataset (NHD)
The National Hydrography Dataset (NHD) represents surface waters of the United States including, rivers, streams, lakes, and coastal features. The Watershed Boundary Dataset (WBD) is comprised of hierarchical polygons called hydrologic units that represent surface area over which water drains to a point. Both datasets are updated by stewards and are available by subsets of the United States.Added to the National Map: Web Services for the National Hydrography Dataset, National Elevation Dataset and National Land Cover Dataset
As one of the cornerstones of the U.S. Geological Survey's (USGS) National Geospatial Program, The National Map is a collaborative effort among the USGS and other Federal, State, and local partners to improve and deliver topographic information for the Nation. It has many uses ranging from recreation to scientific analysis to emergency response. The National Map is easily accessible for display on - News
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