U.S. Geological Survey 20220707 Release 1 vector and raster digital data https://doi.org/10.5066/P9WFOBQI Reston, Virginia U.S. Geological Survey The High Resolution National Hydrography Dataset Plus (NHDPlus HR) is an integrated set of geospatial data layers, including the National Hydrography Dataset (NHD), National Watershed Boundary Dataset (WBD), and 3D Elevation Program Digital Elevation Model (3DEP DEM). The NHDPlus HR combines the NHD, 3DEP DEMs, and WBD to a data suite that includes the NHD stream network with linear referencing functionality, the WBD hydrologic units, elevation-derived catchment areas for each stream segment, "value added attributes" (VAAs), and other features that enhance hydrologic data analysis and routing. These data create a scalable geospatial hydrography framework for general purpose use in geospatial analysis, visualization, modeling, and cartography. 20171215 20210414 20211208 Complete Irregular -170.844538 145.830505 69.80858 -14.374101 ISO Topic Categories from ISO 19115 elevation environment geoscientificInformation base maps inlandWaters USGS Thesaurus geospatial analysis streamflow hydrographic datasets hydrology water resources river reaches land surface characteristics topography cartography earth sciences geographic information systems digital elevation models surface water quality none streams rivers lakes reservoirs FileGDB hydrographic features channels waterbodies watersheds drainage basins catchment streamflow data NHDPlus High Resolution (NHDPlus HR) Geographic Names Information System US United States None All data are open and non-proprietary. Users should be aware that temporal changes may have occurred since this data set was collected and that some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations. Acknowledgment of the U.S. Geological Survey would be appreciated for products derived from these data U.S. Geological Survey mailing and physical address

12201 Sunrise Valley Drive

Reston VA 20192 1-888-ASK-USGS (1-888-275-8747) https://answers.usgs.gov/ Monday through Friday 8:00 AM to 4:00 PM Eastern Time Zone USA Metadata information can also be obtained through online services using The National Map Viewer, at https://www.usgs.gov/core-science-systems/national-geospatial-program/national-map or Ask USGS at https://answers.usgs.gov/ https://prd-tnm.s3.amazonaws.com/StagedProducts/Hydrography/NHDPlusHR/National/GDB/NHDPlus_H_National_Release_1_GDB.jpg Thumbnail JPG image JPEG U.S. Geological Survey None Unclassified None Microsoft Windows Server 2019 Datacenter Version 10.0.17763 Build 17763; Esri ArcGIS 10.8.1 Attributes are not systematically verified. Attribute errors may be present. Data is not expected to contain any topological errors. Network connectivity was verified by tracing upstream from outlets. Topology between drainage area lines and polygons, streams, waterbodies, coastlines, and gages was checked for vertical integration in the national data sets. Not all hydrologic features on the ground (e.g. stream/river, lake/pond, etc.) may be mapped, and changes may have occurred since originally mapped. The level of mapping detail varies by geographic area. The USGS jointly manages these data with local and regional data stewards, usually at the State level, and some variations in content occur based on differences in local/regional stewardship. Horizontal accuracy for source data may be available in the original source product metadata file where available. Vertical accuracy for elevation data may be available in the original source product metadata file where available. U.S. Geological Survey Unknown https://www.usgs.gov/core-science-systems/ngp/national-hydrography 24000 Geospatial dataset 20160630 20210414 publication date NHD The most current NHD available at the time of production was used in conjunction with the most current WBD, and 3DEP DEMs available to create a hydro-enforced DEM for generation of the catchment raster and feature class, and flow direction/accumulation rasters, and used to compute and assign NHDFlowline Value Added Attributes (VAAs). U.S. Geological Survey Unknown https://www.usgs.gov/core-science-systems/ngp/3dep Geospatial dataset 19850630 20210414 publication date 3DEP DEM The most current 3DEP DEM available at time of production was used in combination with the most current NHD and WBD availble at the time of production to create a hydro-enforced DEM, NHDPlus HR Catchments, and surface flow direction and accumulation rasters. Stream elevations from 3DEP DEMs were used to help derive stream slope and stream velocity. U.S. Geological Survey Unkown 24000 Geospatial dataset 20160630 20210414 publication date WBD The most current 12-digit Hydrologic Unit (HU12) boundaries from the Watershed Boundary Dataset (WBD) available at the time of production were used as ridgeline enforcement input in a process called "walling" in the production of hydro-enforced DEMs. Closed basin designations, from the HU12 polygon data were used to impose "sinks" in the hydro-enforced DEMs. NHDPlus HR Build/Refresh Process Initial production set-up:,Create NHDPlus HR Workspace, Create CatMask and Raster Catalog, Prep Elevation Data A. NHD Prep. 1. Run NHDPlus NHDQAQC. 2. Set up GlobalData fgdb, populate VPUSeqNo B. Create NHDPlus HR (VPUID) fgdb, populate with NHD/WBD data. Assign NHDPlusIDs, VPUIDs. Update NHD data, if necessary, update NHDPlusConnect.C. Populate NHDFlowline-based attribute tbls/FCs and compute VAAs (part 1). D. Edit DivFracMP E. QAQC DivFracMP F. Compute VAAs (part 2) G. Trim BurnLineEvent H. Create Raster Workspace, create elev_cm.tif shdrelief.jp2 and elev_source.gdb. I. Create and edit burn components, as needed J. Create Sinks. Examine and Fix sinks, as needed. K. Deprecated L.Create FDR, Catchments and other rasters. M. Review Step L results. N. Deprecated O. Calculate HW Node Areas and Raw Elevations. P. Create Flow Accumulation Raster. Q. Smooth Raw Elevations. R. Accumulate Catchment areas propagate VAAs to upstream VPUs. S Allocate Runoff, Temp, Precip and other EROM Inputs. T. Populate EROM Mean Annual Stream Flow Estimates, QAQC and Velocity. U. Populate NHDPlusProcessingParameter Table. NHDPlusHR National aggregates all NHDPlus HR VPU datasets into one seamless file geodatabase. Process date below is when the NHDPlus HR data was aggregated 20211210 0.00001 0.00001 Decimal degrees North American Datum of 1983 Geodetic Reference System 80 6378137 298.2572221 North American Vertical Datum of 1988 0.001 meters Implicit coordinate U.S. Geological Survey - National Geospatial Program mailing and physical address

12201 Sunrise Valley Drive

Reston VA 20192 USA 1-888-ASK-USGS (1-888-275-8747) Monday through Friday 8:00 AM to 4:00 PM Eastern Time Zone USA Please visit https://answers.usgs.gov/ to contact us. Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. FileGDB Zip 26837.31 https://prd-tnm.s3.amazonaws.com/StagedProducts/Hydrography/NHDPlusHR/National/GDB/NHDPlus_H_National_Release_1_GDB.zip Go to The National Map Viewer - Download page at https://viewer.nationalmap.gov/basic click "How to" and follow instructions. None 20220707 U.S. Geological Survey - National Geospatial Program mailing and physical address

12201 Sunrise Valley Drive

Reston VA 20192 USA 1-888-ASK-USGS (1-888-275-8747) Monday through Friday 8:00 AM to 4:00 PM Eastern Time Zone USA Please visit https://answers.usgs.gov/ to contact us. FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time None None None Unclassified None