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River-channel topography on the Elwha River, Washington, 2006 to 2022 (ver. 2.0, July 2025)

Metadata Updated: September 23, 2025

This portion of the data release presents topographic data collected at 5 study sites along Elwha River, Washington between 2006 and 2022. Elevations along channel-perpendicular transects were surveyed using a total station and prism rod. Initial geodetic control was established using static global positioning system (GPS) occupations. A total station was subsequently used to expand and maintain the survey control network at each site. All survey data were referenced to the NAD83 datum, using the UTM, zone 10, coordinate reference system. All elevations were referenced to the NAVD88 vertical datum. Based on repeat measurements of points with known positions, we estimated the horizontal and vertical accuracy of the topographic measurements to be within 2 to 3 cm. Topographic data were collected using a total station using survey layout routines to locate data along the same transects during each survey. Wetted portions of the channel were measured primarily by wading with the survey rod. In several locations where wading was not feasible due to water depth, measurements were not taken or they were made by swimming with the survey rod or by deploying the survey rod from an inflatable kayak (necessary in the thalweg of reach 3 between 2006 and 2011). Although the focus of the surveys was to make repeated measurements of elevations along a transect, some additional topographic measurements were within the reaches off of the transects. Additionally, a small side channel within reach 2 was surveyed from 2006 to 2008 along transects perpendicular to that channel and along the channel's thalweg.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources

Dates

Metadata Created Date September 12, 2025
Metadata Updated Date September 23, 2025

Metadata Source

Harvested from DOI USGS DCAT-US

Additional Metadata

Resource Type Dataset
Metadata Created Date September 12, 2025
Metadata Updated Date September 23, 2025
Publisher U.S. Geological Survey
Maintainer
Identifier http://datainventory.doi.gov/id/dataset/usgs-5a989288e4b06990606de04b
Data Last Modified 2025-07-03T00:00:00Z
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://ddi.doi.gov/usgs-data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Harvest Object Id e288a002-91c2-4052-9450-2e0f3fdb3b7f
Harvest Source Id 2b80d118-ab3a-48ba-bd93-996bbacefac2
Harvest Source Title DOI USGS DCAT-US
Metadata Type geospatial
Old Spatial -123.625, 47.954370, -123.54, 48.151755
Source Datajson Identifier True
Source Hash 26adbfd485337b73f66846cea6aa8f16f1ac647e9863f61cfb69e9ae97e9b2e9
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -123.625, 47.954370, -123.625, 48.151755, -123.54, 48.151755, -123.54, 47.954370, -123.625, 47.954370}

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