National Hydrography Dataset (NHD)
The NHD is a GIS Dataset used to portray surface water and represents the drainage network with features such as rivers, streams, canals, lakes, ponds, coastline, dams, and stream gages. The NHD is the surface water hydrography layer of The National Map.
For more information on the NHD, please visit the USGS NHD website and the NHD Feature Catalog.
Watershed Boundary Dataset (WBD)
IDWR and Natural Resource Conservation Service (NRCS), in cooperation with various state and local agencies, produced the statewide WBD for 5th and 6th field watersheds for the State of Idaho. Idaho received a Full Certification status for the WBD effort in Idaho on December 2, 2008. Thank you to all cooperators, data stewards and interested parties who helped in this endeavor!
For more information on the WBD, please visit the USGS WBD website or the NRCS Watershed website.
The NHD & WBD are integrated into a common data model, and the new WBD boundaries are packaged with the NHD Subbasins as they are checked out and downloaded.
The NHD can be downloaded by Hydrologic Unit using the NHD Viewer, by Pre-Staged Subregion, by State Extract, or with a National Snapshot.
The WBD can be download a standalone dataset by areas of interest.
Do you have edits to the NHD or WBD?
- NHD - If you have edits for the NHD, there are two methods for submitting edits for review:
- WBD - Updates to the WBD are now in the maintenance phase. Revisions may be required to incorporate corrections within the state or along the international border in order to further harmonize the data and create a seamless dataset across boundaries. Work is underway to develop standards for incorporating 14 and 16-digit delineations into the WBD. If you have edits to the WBD, please send an email to the NHD/WBD team.
If you have questions about what data is currently being updated and the projects occurring around the state, please visit the Projects page or contact the NHD/WBD team.