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    • 700kHz Multibeam Backscatter Mosaics of select Rock Outcrops of the St. Croix River, May 2021

    Metadata Updated: October 29, 2025

    This dataset is a digital image mosaic of the backscatter for five (of six) sites where known rock structures exist in the St. Croix River. Backscatter is the strength of the returned signal, or reflectivity, of the riverbed and provides information about bed composition. This data can be used to investigate properties of the riverbed, such as hardness, sediment characteristics and even sediment grain size. Backscatter information will be used for investigating the use of hydroacoustic technologies for quantifying habitat for imperiled mussels Spectaclecase (Margaritifera monodonta) and Salamander (Simpsonaias ambigua) typically associated with rock structures (e.g., wing dams, revetment) in rivers. MBES bathymetry and backscatter data are collected at the same time; and were collected using a Norbit integrated wide band multibeam system compact (iWBMSc) sonar unit. All hydroacoustic data were collected in early May of 2021, and the backscatter mosaics are provided in GeoTiff format.

    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 October 29, 2025

    Metadata Source

    Harvested from DOI USGS DCAT-US

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date September 12, 2025
    Metadata Updated Date October 29, 2025
    Publisher U.S. Geological Survey
    Maintainer
    Identifier http://datainventory.doi.gov/id/dataset/usgs-6359a287d34ebe442503eb96
    Data Last Modified 2025-02-27T00:00:00Z
    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 2cc50017-9bd1-4cdd-8836-09cc6fa4aa31
    Harvest Source Id 2b80d118-ab3a-48ba-bd93-996bbacefac2
    Harvest Source Title DOI USGS DCAT-US
    Metadata Type geospatial
    Old Spatial -92.7636, 45.2165, -92.6848, 45.3712
    Source Datajson Identifier True
    Source Hash c2831d5d7bddede530e4fa7601d73e483951db5c0afb32573cc69d0d8d6784da
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -92.7636, 45.2165, -92.7636, 45.3712, -92.6848, 45.3712, -92.6848, 45.2165, -92.7636, 45.2165}

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