USGS National Hydrography Dataset from The National Map

Metadata Updated: June 8, 2018

USGS The National Map - National Hydrography Dataset (NHD) is a comprehensive set of digital spatial data that encodes information about naturally occurring and constructed bodies of surface water (lakes, ponds, and reservoirs), paths through which water flows (canals, ditches, streams, and rivers), and related entities such as point features (springs, wells, stream gages, and dams). The information encoded about these features includes classification and other characteristics, delineation, geographic name, position and related measures, a "reach code" through which other information can be related to the NHD, and the direction of water flow. The network of reach codes delineating water and transported material flow allows users to trace movement in upstream and downstream directions. In addition to this geographic information, the dataset contains metadata that supports the exchange of future updates and improvements to the data. The NHD is available nationwide in two seamless datasets, one based on 1:24,000-scale maps and referred to as high resolution NHD, and the other based on 1:100,000-scale maps and referred to as medium resolution NHD. Additional selected areas in the United States are available based on larger scales, such as 1:5,000-scale or greater, and referred to as local resolution NHD. The NHD supports many applications, such as making maps, geocoding observations, flow modeling, data maintenance and stewardship. For additional information on NHD, go to http://nhd.usgs.gov/. The Watershed Boundary Dataset (WBD) is a companion dataset to the NHD. It defines the perimeter of drainage areas formed by the terrain and other landscape characteristics. The drainage areas are nested within each other so that a large drainage area, such as the Upper Mississippi River, will be composed of multiple smaller drainage areas, such as the Wisconsin River. Each of these smaller areas can further be subdivided into smaller and smaller drainage areas. The WBD uses six different levels in this hierarchy, with the smallest averaging about 30,000 acres. The WBD is made up of polygons nested into six levels of data respectively defined by Regions, Subregions, Basins, Subbasins, Watersheds, and Subwatersheds. For additional information on WBD, go to http://nhd.usgs.gov/wbd.html.

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Dates

Metadata Date January 1, 2013
Metadata Created Date June 8, 2018
Metadata Updated Date June 8, 2018
Reference Date(s) January 1, 2013 (publication)
Frequency Of Update asNeeded

Metadata Source

Harvested from USGS Cached Base Map Services from The National Map

Graphic Preview

Browse graphic showing US representation at small scale.

Additional Metadata

Resource Type Dataset
Metadata Date January 1, 2013
Metadata Created Date June 8, 2018
Metadata Updated Date June 8, 2018
Reference Date(s) January 1, 2013 (publication)
Responsible Party U.S. Geological Survey, National Geospatial Technical Operations Center (Point of Contact)
Contact Email
Access Constraints Use Constraints: None. Acknowledgement of the originating agencies would be appreciated in products derived from these data., Access Constraints: None
Bbox East Long 180
Bbox North Lat 71.5
Bbox South Lat 17.625
Bbox West Long -179.1666667
Coupled Resource
Frequency Of Update asNeeded
Graphic Preview Description Browse graphic showing US representation at small scale.
Graphic Preview File http://thor-f5.er.usgs.gov/ngtoc/metadata/waf/services/base_maps/browse/basemap-hydro.jpg
Graphic Preview Type JPG
Guid
Harvest Object Id 226bd31f-e8ec-40d0-8607-ea444081bcd3
Harvest Source Id c361474f-cff4-48e6-a21a-c2017bfea84b
Harvest Source Title USGS Cached Base Map Services from The National Map
Licence Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. It is strongly recommended that these data are directly acquired from a U.S. Geological Survey server, and not indirectly through other sources which may have changed the data in some way. It is also strongly recommended that careful attention be paid to the contents of the metadata file associated with these data. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein.
Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True

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