{
    "tag": 14763,
    "title": "Multibeam acoustic-backscatter data collected offshore of south-central California in support of the Bureau of Ocean Energy Management Cal DIG I offshore alternative energy project",
    "pubdate": "20220108",
    "sername": null,
    "series_name": null,
    "issue": "DOI:10.5066\/P9QQZ27U",
    "publish": null,
    "publisher_name": null,
    "onlink": "https:\/\/cmgds.marine.usgs.gov\/catalog\/pcmsc\/DataReleases\/CMGDS_DR_tool\/DR_P9QQZ27U\/Cal_DIG_I_Backscatter_10m_Metadata.faq.html",
    "format": null,
    "email": null,
    "descript": "Multibeam acoustic-backscatter data were collected offshore of Morro Bay, California, from 2016 to 2019. The data were collected during five separate multi-agency surveys for the U.S. Geological Survey (USGS)\/Bureau of Ocean Energy Management (BOEM) California Deepwater Investigations and Groundtruthing I (Cal DIG I) project, under a collaboration with the National Oceanic and Atmospheric Administration (NOAA), using Simrad 700 series hull-mounted multibeam echosounders. Data in 2017 and 2018 were acquired by the NOAA Hydrographic Vessel Rainier (surveys H1309, H13151, and H13152). The 2018 data acquired by the Ranier were collected during USGS field activity 2018-641-FA. Additional data were collected in 2019 by the NOAA Hydrographic Survey Vessel Fairweather (survey W00479). Data from the Scripps Institution of Oceanography R\/V Sally Ride collected in 2016 (survey SR1604) were used to fill in a small gap in the NOAA data. The acoustic-backscatter data from the five surveys were combined into a single raster and are provided as a 10-meter resolution GeoTIFF.",
    "lang": null,
    "journal": null,
    "pwid": null,
    "originator": [
        {
            "name": "Cochrane, Guy R.",
            "role": "Author"
        },
        {
            "name": "Dartnell, Peter",
            "role": "Author"
        },
        {
            "name": "Kuhnz, Linda A.",
            "role": "Author"
        },
        {
            "name": "Gilbane, Lisa",
            "role": "Author"
        },
        {
            "name": "Walton, Maureen A. L.",
            "role": "Author"
        }
    ],
    "index_term": [
        {
            "thcode": 2,
            "code": "474",
            "name": "geospatial datasets",
            "scope": "Collections of related digital information that are geographically referenced."
        },
        {
            "thcode": 2,
            "code": "2046",
            "name": "image mosaics",
            "scope": "Composite images formed by overlapping existing images, typically arranged to achieve greater spatial coverage."
        },
        {
            "thcode": 2,
            "code": "707",
            "name": "marine geophysics",
            "scope": "Branch of earth sciences concerned with the physical processes of the oceans and continental margins.  We include here studies of large bodies of brackish and fresh water, such as lakes and rivers."
        },
        {
            "thcode": 2,
            "code": "2036",
            "name": "multibeam sonar",
            "scope": "Acoustic technique for determining depths or creating backscatter imagery in a wide swath of seafloor or lakebed centered below the instrument platform."
        },
        {
            "thcode": 2,
            "code": "2053",
            "name": "sea-floor acoustic reflectivity",
            "scope": "Acoustic energy received by a sonar system, providing a measure of the roughness of the sea floor."
        },
        {
            "thcode": 2,
            "code": "1025",
            "name": "sea-floor characteristics",
            "scope": "Geomorphic features and geographic, compositional, and textural variation in the materials composing the ocean floor. Includes both large-scale structures (such as seamounts and rises) and fine-scale variations in rocks and deposits on the sea floor."
        },
        {
            "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": 23,
            "code": "3",
            "name": "Distributions",
            "scope": "Locations or patterns of a feature of interest across space and (or) time. These data can include point data, lines, polygons, and temporal data at any scale relevant to CMSP and can be produced by observation, interpolation, or modeling. Distributions can also include maps or statistics of climatology, the environmental values that are expected to be observed at the present time."
        },
        {
            "thcode": 61,
            "code": "400",
            "name": "field observation",
            "scope": "scientific investigation of physical or biological features and processes in a natural setting."
        },
        {
            "thcode": 61,
            "code": "173",
            "name": "seabed",
            "scope": "the floor of a sea or ocean."
        }
    ],
    "place_term": [],
    "image": [],
    "fan": []
}