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National Hydrography Dataset (NHD) - USGS National Map Downloadable Data Collection 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... Boundaries, Boundary, Bridge, Canal/Ditch, Coastline, Connector, Dam/Weir, Drainage area for surface water, Estuary, FileGDB, Flow direction network, Flume, ForeShore, Gaging Station, Gate, GeoPackage, HU10, HU12, HU14, HU16, HU2, HU4, HU6, HU8, HUC, Hazard Zone, Hydrographic, Hydrography, Hydrologic Unit, Hydrologic Unit Code, Hydrologic Units, Ice mass, Inundation Area, Lake, Levee, Line, Lock Chamber, Marsh, NGDA, NGDAID159, National Geospatial Data Asset, Nonearthen Shore, Playa, Point, PointEvent, Pond, Rapids, Reach, Reach code, Reef, Region, Reservoir, River, Rock, Sea/Ocean, Sink/Rise, Sounding Datum Line, Special Use Zone, Special Use Zone Limit, Spillway, Stream, Stream/River, Submerged Stream, Swamp, Topographic, Tunnel, US, USGS:ecd2ad5e-faa2-4291-bcdb-441b7113ea41, Underground Conduit, United States, WBD, Wall, Wash, Water Inland Theme, Water Intake Outflow, Waterfall, Watershed, Watershed Boundaries, Watershed Boundary Dataset, Well, artificial path, boundaries, dams, drainage systems and characteristics, inlandWaters, surface water, surface water systems, Fewer tags National Hydrography Dataset Plus High Resolution (NHDPlus HR) - USGS National Map Downloadable Data Collection The High Resolution National Hydrography Dataset Plus (NHDPlus HR) is an integrated datset of geospatial data layers, including the most current National Hydrography Dataset (NHD), the 10-meter 3D Elevation Program Digital Elevation Model (3DEP DEM), and the National Watershed Boundary Dataset (WBD). The NHDPlus HR combines the NHD, 3DEP DEMs, and WBD to create a stream network with linear referencing, feature naming, "value added attributes" (VAAs), elevation-derived catchments, and other features for hydrologic data analysis. The stream network with linear referencing is a system of data relationships applied to hydrographic systems so that one stream reach "flows" into another and "events" can be tied to and... Types: Citation; Tags: Administrative watershed units, Area of Complex Channels, Area to be submerged, Basin, Bay/Inlet, All tags... Boundaries, Boundary, Bridge, Canal/Ditch, Coastline, Connector, Dam/Weir, Drainage area for surface water, Estuary, FileGDB, Flow direction network, Flume, ForeShore, Gaging Station, Gate, GeoPackage, HU10, HU12, HU14, HU16, HU2, HU4, HU6, HU8, HUC, Hazard Zone, Hydrographic, Hydrography, Hydrologic Unit, Hydrologic Unit Code, Hydrologic Units, Ice mass, Inundation Area, Lake, Levee, Line, Lock Chamber, Marsh, NHDPlus High Resolution (NHDPlus HR), Nonearthen Shore, Playa, Point, PointEvent, Pond, Rapids, Reach, Reach code, Reef, Region, Reservoir, River, Rock, Sea/Ocean, Sink/Rise, Sounding Datum Line, Special Use Zone, Special Use Zone Limit, Spillway, Stream, Stream/River, Submerged Stream, Swamp, Topographic, Tunnel, US, USGS:0826ab39-e5bd-47e6-ba8f-56f340094f81, Underground Conduit, United States, WBD, Wall, Wash, Water Intake Outflow, Waterfall, Watershed, Watershed Boundaries, Watershed Boundary Dataset, Well, artificial path, boundaries, cartography, catchment, dams, digital elevation models, drainage basins, drainage systems and characteristics, earth sciences, elevation, environment, geographic information systems, geoscientificInformation, geospatial analysis, hydrographic datasets, hydrology, imageryBaseMapsEarthCover, inlandWaters, land surface characteristics, river reaches, streamflow, streamflow data, surface water, surface water quality, surface water systems, topography, water resources, watersheds, Fewer tags