Source Data
The 3DHP is comprised of data from the National Hydrography Dataset (NHD) and hydrography derived from elevation, stored in a common data model. More information about NHD and Elevation Derived Hydrography specifications can be found at National Geospatial Program Hydrography Standards and Specifications website.
Products
3DHP_all Service
3DHP_all 2023 Specification
Crosswalk Tables
Crosswalk tables for the National Hydrography Dataset (NHD) and Elevation-Derived Hydrography (datasets) to the 3D Hydrography Program (3DHP) programs.
References
Blodgett, David L., 2017, The Network Linked Data Index and geoconnex.us, accessed at https://waterdata.usgs.gov/blog/nldi-geoconnex/.
National Oceanic and Atmospheric Administration, 2018, North American Datum of 1983: accessed August 2, 2023, at https://geodesy.noaa.gov/datums/horizontal/north-american-datum-1983.sh….
National Oceanic and Atmospheric Administration, 2018, North American Vertical Datum of 1988: accessed August 2, 2023, at https://geodesy.noaa.gov/datums/vertical/north-american-vertical-datum-….
Open Geospatial Consortium, 2018, OGC® WaterML 2: Part 3 - Surface Hydrology Features (HY_Features) - Conceptual Model: accessed September 15, 2023 at https://docs.ogc.org/is/14-111r6/14-111r6.html.
U.S. Geological Survey, 2022, Elevation-Derived Hydrography Acquisition Specifications: accessed February 2, 2023, at https://www.usgs.gov/ngp-standards-and-specifications/elevation-derived….
U.S. Geological Survey, 2022, Geographic Names Information System (GNIS): accessed September 15, 2023, at https://www.usgs.gov/tools/geographic-names-information-system-gnis.
U.S. Geological Survey, 2023, Hydrography Standards and Specifications: accessed August 2, 2023, at https://www.usgs.gov/ngp-standards-and-specifications/hydrography-stand….
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