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The USGS National Hydrography Dataset (NHD) service from The National Map (TNM) 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...
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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. This high-resolution NHD, generally developed at 1:24,000/1:12,000 scale, 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.) 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...
Categories: Data; Types: Citation; Tags: Administrative watershed units, Area of Complex Channels, Area to be submerged, Basin, Bay/Inlet, All tags...
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U.S. Geological Survey, Department of the Interior - The annual National Hydrography Dataset (NHD) stewardship plan is to maintain hydrography data in the NHD over the United States and its territories. NHD for the nation has been collected and is now in maintenance mode. Interested parties who wish to become a NHD stewardship partner with the USGS in FY17 or in future years should contact a USGS Geospatial Liaison - http://liaisons.usgs.gov/geospatial/documents/TNM_Partnership_User_ContactList.pdf. To find out more about hydrography stewardship go to http://nhd.usgs.gov/stewardship.html or for exact project status information on areas currently in work go to http://nhd.usgs.gov/project_status.html


    map background search result map search result map National Hydrography Dataset (NHD) - USGS National Map Downloadable Data Collection USGS National Hydrography Dataset (NHD) Stewardship Plan Objectives for FY17 from the The National Map - National Geospatial Data Asset (NGDA) National Hydrography Dataset (NHD) USGS Hydrography (NHD) Overlay Map Service from The National Map - National Geospatial Data Asset (NGDA) National Hydrography Dataset (NHD) USGS Hydrography (NHD) Overlay Map Service from The National Map - National Geospatial Data Asset (NGDA) National Hydrography Dataset (NHD) National Hydrography Dataset (NHD) - USGS National Map Downloadable Data Collection USGS National Hydrography Dataset (NHD) Stewardship Plan Objectives for FY17 from the The National Map - National Geospatial Data Asset (NGDA) National Hydrography Dataset (NHD)