National Hydrography Dataset
![]() |
![]() The NHD is based upon the content of USGS Digital Line Graph (DLG) hydrography data integrated with reach-related information from the EPA Reach File Version 3 (RF3). The NHD supersedes DLG and RF3 by incorporating them, not by replacing them. Users of DLG or RF3 will find the National Hydrography Dataset both familiar and greatly expanded and refined. While initially based on 1:100,000-scale data, the NHD is designed to incorporate and encourage the development of higher resolution data required by many users. |
![]() |
![]() |
![]() |
![]() NHDinGEO Information Interested in NHDPlus? June 2007 See the monthly NHD Newsletters indexed by subject or date. USFS Reprojection Tool Version 1.3.1 (updated). May 2007 To access the Geographic Names Information System (GNIS) to check, submit new, or make changes to names in GNIS, go to our GNIS Information page. Upcoming NHD Training, Workshops, and Conference Presentations |
![]() |
![]() |
![]() |