December 2024 USGS Hydrography Community Call: Delivering and Using 3D Hydrography Program (3DHP) Data
linkThe 3D Hydrography Program (3DHP) database will initially be populated with the National Hydrography Dataset (NHD) features, mapped to the new data model. The NHD-source features will be replaced with hydrography derived from the 3D Elevation Program (3DEP) lidar and IfSAR data as it becomes available.