Skip to main content

NHD 20200616 for Ohio State or Territory FileGDB 10.1 Model Version 2.2.1


Publication Date
Start Date
End Date
File Modification Date
2021-03-26 09:48:18


U.S. Geological Survey, National Geospatial Program, 20200616, NHD 20200616 for Ohio State or Territory FileGDB 10.1 Model Version 2.2.1: U.S. Geological Survey.


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 bodies. Reaches [...]


Attached Files


The NHD is a national framework for assigning reach addresses to water-related entities, such as industrial discharges, drinking water supplies, fish habitat areas, wild and scenic rivers. Reach addresses establish the locations of these entities relative to one another within the NHD surface water drainage network, much like addresses on streets. Once linked to the NHD by their reach addresses, the upstream/downstream relationships of these water-related entities--and any associated information about them--can be analyzed using software tools ranging from spreadsheets to geographic information systems (GIS). GIS can also be used to combine NHD-based network analysis with other data layers, such as soils, land use and population, to help understand and display their respective effects upon one another. Furthermore, because the NHD provides a nationally consistent framework for addressing and analysis, water-related information linked to reach addresses by one organization (national, state, local) can be shared with other organizations and easily integrated into many different types of applications to the benefit of all.
Thumbnail JPG image
Thumbnail JPG image



  • National Geospatial Program
  • National Hydrography Dataset (NHD)
  • The National Map




Data source
NGP Product Inventory System

Additional Information


Type Scheme Key
uuid inventory b47591a5-c09f-1982-b573-3726fbb664d2

Item Actions

View Item as ...

Save Item as ...

View Item...