What is the positional accuracy of the National Hydrography Dataset (NHD)?

Original hydrographic data were compiled to meet National Map Accuracy standards. These standards have been maintained in the process of creating the NHD. At 1:100,000 scale, ninety percent of well-defined features are within 167 feet (0.02 inches at map scale) of their true geographic position. When higher resolution data are created and submitted, the positional accuracy may vary due to processing procedures of the contributing sources. USGS Map Accuracy standards for 1:24,000 scale require ninety percent of well-defined features to lie within 40 feet of their true geographic position.

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How should I cite datasets and services from The National Map?

The USGS does not require a specific format when citing data obtained through The National Map ; you should follow the citation guidelines provided by instructors or publication editors as appropriate. The following should help you find the information that you need: Citation for Datasets Author: U.S. Geological Survey Release date: the first four...

What sources were used to produce the National Hydrography Dataset (NHD)?

The National Hydrography Dataset (NHD) is a combination of USGS hydrologic digital line graph (DLG) files and Environmental Protection Agency (EPA) reach files, version 3.0 (RF3). U.S. Forest Service Cartographic Feature Files (CFF) and USGS Tagged Vector Hydro (TVH) captured from 7.5-minute printed maps were also used. Some states also...

What is the National Hydrography Dataset (NHD)?

The National Hydrography Dataset (NHD) is a digital vector dataset used by Geographic Information Systems (GIS) to define the spatial locations of surface waters and is designed to provide comprehensive coverage of surface water data for the U.S. The NHD contains features such as lakes, ponds, streams, rivers, canals, dams, and stream gages in a...

What formats are available for hydrography data products in The National Map?

Hydrography data are offered in Esri File Geodatabase 10.1 or Shapefile formats. National Hydrography Dataset (NHD) data is available as state extracts, 4-digit sub-regions, 8-digit sub-basins, or in a specified extent from The National Map Downloader . A national extent of medium and high resolution NHD data in File Geodatabase format is also...

How do I download hydrography data products?

Download USGS hydrography data (datasets representing U.S. surface water for mapping and modeling applications) using The National Map Downloader or using download links that are listed at Access National Hydrography Products . Learn more: The National Map Training Videos National Hydrography Dataset User Guide For streamflow data, see: Where can...
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Date published: October 21, 2019

National Hydrography September 2019 Newsletter released

The USGS National Hydrography Dataset Newsletter, Vol. 18, No. 9, September 2019 has been released and posted for viewing.

Date published: November 7, 2017

NHD and WBD Map Services Moving to the Cloud

As part of an ongoing effort to improve performance and reliability for the suite of USGS Hydrography web-based map services, the USGS is migrating the National Hydrography Dataset and Watershed Boundary Dataset services to a Cloud location.

Date published: July 27, 2017

Exploring the Nation's waterways through the National Hydrography Dataset Plus

Interested in finding a good river to float down this hot summer? Or a favorite fishing hole? Ever wonder where those blue lines mapping the rivers, streams and lakes on the US Topo and other maps come from?

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NHDPlus, WBD,  and Catchments
May 4, 2019

NHDPlus, WBD, and Catchments

Hydrography map showing National Hydrography Data Set Plus High Resolution (NHD Plus HR) , Watershed Boundary Data Set (WBD) catchments and Digital Elevation Model (DEM) data.

February 5, 2019

Lesson 15b: NHDPlus HR

This lesson will provide a brief overview of the National Hydrography Dataset, Watershed Boundary Dataset and 3D Elevation program. This lesson will also discuss NHDPlus and introduce NHDPlus high resolution and tell you how to get the data.

Alask Mat-su Watershed Relief and Hydrography
May 24, 2018

Alaska Mat-Su Watershed

This graphic shows the extent of the Mat-Su Watershed and displays the terrain and hydrography of the basin.

May 23, 2017

Hydrography Seminar Series - Session 9 (NHDPlus HR)

The USGS Hydrography Seminar Series shares success stories from users, provides information on the National Hydrography Dataset (NHD), Watershed Boundary Dataset (WBD), NHDPlus High Resolution (NHDPlus HR), and other related products, and provides a forum for users to learn more about hydrography-related topics. Seminar 9 is an overview of the NHDPlus HR.