{
    "tag": 20837,
    "title": "Coastal Single-beam Bathymetry Data Collected in 2024 From Breton Island, Louisiana",
    "pubdate": "20260423",
    "sername": null,
    "series_name": null,
    "issue": null,
    "publish": null,
    "publisher_name": null,
    "onlink": "https:\/\/cmgds.marine.usgs.gov\/catalog\/spcmsc\/Breton_Island_2024_SBES_WGS84_UTM16N_xyz_metadata.faq.html",
    "format": null,
    "email": null,
    "descript": "As part of the restoration monitoring component of the Deepwater Horizon early restoration project, scientists from the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center (USGS SPCMSC) conducted single-beam and multibeam bathymetry surveys around Breton Island, Louisiana (LA), from August 5-10, 2024, for Field Activity Number (FAN) 2024-320-FA. The purpose of data collection was to measure submerged elevations and develop a digital elevation model of the seafloor around Breton Island. These data were collected as part of the Louisiana Outer Coast Restoration Construction Monitoring project supported by funding from the Natural Resource Damage Assessment - Deepwater Horizon Restoration Activities and, in combination with both previous and planned future surveys, can be used to evaluate elevation change following island restoration. The survey area covered approximately 77 square kilometers (km^2) of nearshore environment surrounding Breton Island and extended into the adjacent portion of the former Mississippi River to Gulf Outlet (MRGO). The single-beam bathymetry was acquired using two 12-foot personal watercraft (PWC) and one 20-foot power catamaran. All vessels were outfitted with high precision Global Navigation Satellite System (GNSS) receivers, motion reference units, and survey grade single-beam echosounders (SBES). For additional information on post-processing steps, please refer to DeWitt and others (2016) and Hansen and others (2017). Multibeam echosounder (MBES) data including the backscatter component and chirp seismic sub-bottom data were collected concurrently as part of FAN 2024-320-FA; those data are available as separate data releases: Bemelmans and others (2025); Forde and others (2025), respectively.",
    "lang": null,
    "journal": null,
    "pwid": null,
    "originator": [
        {
            "name": "DeWitt, Nancy T.",
            "role": "Author"
        },
        {
            "name": "Flocks, James G.",
            "role": "Author"
        },
        {
            "name": "Bernier, Julie C.",
            "role": "Author"
        }
    ],
    "index_term": [
        {
            "thcode": 2,
            "code": "80",
            "name": "bathymetry",
            "scope": "The elevation of the earth's surface beneath a body of water, especially the ocean, typically determined by measurements of depth from the water surface."
        },
        {
            "thcode": 2,
            "code": "470",
            "name": "geophysics",
            "scope": "Branch of geology studying the physical characteristics and phenomena of the earth and its atmosphere."
        },
        {
            "thcode": 2,
            "code": "474",
            "name": "geospatial datasets",
            "scope": "Collections of related digital information that are geographically referenced."
        },
        {
            "thcode": 2,
            "code": "706",
            "name": "marine geology",
            "scope": "Branch of geology concerned with the composition, geologic history, and earth processes of the ocean floor and the continental margin."
        },
        {
            "thcode": 2,
            "code": "810",
            "name": "ocean characteristics",
            "scope": "The attributes and process of seas and oceans."
        },
        {
            "thcode": 2,
            "code": "816",
            "name": "ocean processes",
            "scope": "Recurrent natural changes that are physical, biological, or chemical, actively affecting the seas and oceans."
        },
        {
            "thcode": 2,
            "code": "2035",
            "name": "single-beam echo sounder",
            "scope": "Acoustic technique for determining seafloor or lakebed depth directly below the instrument platform."
        },
        {
            "thcode": 15,
            "code": "006",
            "name": "elevation",
            "scope": "Height above or below sea level, for example altitude, bathymetry, digital elevation models, slope, derived products, DEMs, TINs"
        },
        {
            "thcode": 15,
            "code": "008",
            "name": "geoscientificInformation",
            "scope": "Information pertaining to earth sciences, for example geophysical features and processes, geology, minerals, sciences dealing with the composition, structure and origin of the earth's rocks, risks of earthquakes, volcanic activity, landslides, gravity information, soils, permafrost, hydrogeology, groundwater, erosion"
        },
        {
            "thcode": 15,
            "code": "010",
            "name": "imageryBaseMapsEarthCover",
            "scope": "Base maps, for example land\/earth cover, topographic maps, imagery, unclassified images, annotations, digital ortho imagery"
        },
        {
            "thcode": 15,
            "code": "013",
            "name": "location",
            "scope": "Positional information and services, for example addresses, geodetic networks, geodetic control points, postal zones and services, place names, geographic names"
        },
        {
            "thcode": 15,
            "code": "014",
            "name": "oceans",
            "scope": "Features and characteristics of salt water bodies (excluding inland waters), for example tides, tidal waves, coastal information, reefs, maritime, outer continental shelf submerged lands, shoreline"
        }
    ],
    "place_term": [
        {
            "thcode": 1,
            "code": "fUS",
            "name": "United States",
            "scope": "country",
            "pname": "North America"
        },
        {
            "thcode": 1,
            "code": "q30090",
            "name": "Breton Sound",
            "scope": "map quadrangle, 1x2 degree",
            "pname": ""
        },
        {
            "thcode": 1,
            "code": "q30090SWG1",
            "name": "Breton Islands",
            "scope": "map quadrangle, 7.5 minute",
            "pname": "Mississippi River Delta"
        },
        {
            "thcode": 1,
            "code": "fUS22",
            "name": "Louisiana",
            "scope": "state",
            "pname": "United States"
        }
    ],
    "image": [],
    "fan": []
}