NHD Program Documentation
- Geographic Names Information System (GNIS)
Access GNIS to check, submit new, or make changes to names in GNIS.
- NHD Standards
Defines features, feature attributes, attribute values, delineation, representation rules, and data extraction for the National Hydrography Dataset-High Resolution (NHD-HR) at scales at 1:100,000 or larger.
- WBD Standards
This document contains standards and specifications for WBD data. It also includes discussion of objectives, communications required for revising the data resolution in the United States and the Caribbean, as well as final review and data-quality criteria.
- NHDinARC
- Concepts and Contents
Concepts and Contents describes the concepts and information content of the NHD, including features, metadata, geographic names, coordinate systems and related measures, and data quality. The information is generally independent of any implementation.
NHD Model (v2.1)
Diagram of the tables, the table items, the item definitions, and the relationships between the tables in the NHDinGEO data model.
NHD Fact Sheet
A brief summary of the history and characteristics of the NHD, with additional information concerning obtaining, and maintaining the NHD.
Linear Referencing Fact Sheet
An informative description of how scientists store and link information to the NHD using a relational data design.