NHDPLUS Version 2 IS COMING!!
NHDPlus Version 2 (NHDPlusV2) will soon begin its public debut on this website. The data will be released by hydrologic region beginning in late April/early May.
An announcement will be sent to those who have signed up for the NHDPlus email list. To sign up for the email list, please send an email with your contact information to NHDPlus@hscnet.com
The NHDPlus Team can be reached at NHDPlus@hscnet.com.
Horizon Systems and NHD Plus
As a member of the NHDPlus team, Horizon Systems is pleased to host the NHDPlus WEB site.
NHDPlus is a project envisioned by the US Environmental Protection Agency.
The EPA Office of Water, assisted by the US Geological Survey, has supported the development of NHDPlus to enhance the
EPA WATERS application. NHDPlus is an integrated
suite of application-ready geospatial data sets that incorporate many
of the best features of the National Hydrography Dataset (NHD), the
National Elevation Dataset (NED), the National Land Cover Dataset (NLCD),
and the Watershed Boundary Dataset (WBD).
First released in 2006, the NHDPlus consists of nine components:
- Greatly improved 1:100K National Hydrography Dataset (NHD)
- A set of value added attributes to enhance stream network navigation, analysis and display
- An elevation-based catchment for each flowline in the stream network
- Catchment characteristics
- Headwater node areas
- Cumulative drainage area characteristics
- Flow direction, flow accumulation and elevation grids
- Flowline min/max elevations and slopes
- Flow volume & velocity estimates for each flowline in the stream network
In addition to working on the construction of the NHDPlus, Horizon Systems
conducts NHDPlus training and technical support and develops tools for use with the NHDPlus data.
Additional information
NHDPlus data was developed by hydrologic region within the U.S.
The completed data is served from the Horizon Systems FTP site and may be
freely downloaded.
The NHDPlus Elevation, Flow Accumulation and Flow Direction
grids are distributed by sub-parts of hydrologic regions. These
sub-parts are referred to as "production units". A national
shapefile of the production
units is available.
Additional information about NHDPlus components is available:
News & Updates
For the latest information on the development of NHDPlus, go to NHDPlus News.
If you would like to receive occasional emails about the
availability of NHDPlus data, tools and updates, send your
name, phone number, organization, and email address to
NHDPlus Support.
|
