{
    "tag": 19500,
    "title": "Coastal Features Extracted from Landsat Satellite Imagery, Sabine Pass to Bay Coquette, Louisiana, 2013-2024",
    "pubdate": "20251203",
    "sername": null,
    "series_name": null,
    "issue": null,
    "publish": null,
    "publisher_name": null,
    "onlink": "https:\/\/cmgds.marine.usgs.gov\/catalog\/spcmsc\/la_features_metadata.faq.html",
    "format": null,
    "email": null,
    "descript": "This data release serves as an archive of coastal land-cover and feature datasets derived from Landsat satellite imagery from Sabine Pass to Bay Coquette, Louisiana (LA). A total of 179 images acquired between 2013 and 2024 were analyzed. Water, bare earth (sand), and vegetated land-cover classes were mapped using (1) successive thresholding and masking of the modified normalized difference water index (mNDWI), the normalized difference bare land index (NBLI), and the normalized difference vegetation index (NDVI) and (2) applying a rule-based classification modified from the workflow described by Bernier and others (2021). Vector shoreline and sand feature extents were extracted for each image by contouring the spectral indices using the calculated threshold values. Funded by the Extending Government Funding and Delivering Emergency Assistance Act (Public Law 117-43) enacted on September 30, 2021, these data support assessments of changes that occurred along the Louisiana coast following the passage of Hurricanes Laura, Delta, and Zeta in 2020 and Hurricane Ida in 2021.",
    "lang": null,
    "journal": null,
    "pwid": null,
    "originator": [
        {
            "name": "Bernier, Julie C.",
            "role": "Author"
        },
        {
            "name": "Nick, Sydney K.",
            "role": "Author"
        },
        {
            "name": "Williams, Breanna N.",
            "role": "Author"
        },
        {
            "name": "Miselis, Jennifer L.",
            "role": "Author"
        }
    ],
    "index_term": [
        {
            "thcode": 2,
            "code": "174",
            "name": "coastal ecosystems",
            "scope": "Biological communities and habitats within the narrow zones of land between the margin of oceans or seas and large landmasses."
        },
        {
            "thcode": 2,
            "code": "2092",
            "name": "contouring",
            "scope": "Derivation of contours, or other lines of constant value, that visually summarize the spatial variation of some characteristic over an area, for example elevation."
        },
        {
            "thcode": 2,
            "code": "468",
            "name": "geomorphology",
            "scope": "Branch of geology dealing with surface land features and the processes that create and change them."
        },
        {
            "thcode": 2,
            "code": "474",
            "name": "geospatial datasets",
            "scope": "Collections of related digital information that are geographically referenced."
        },
        {
            "thcode": 2,
            "code": "575",
            "name": "image collections",
            "scope": "Visible representations of objects or earth properties produced by cameras, spectral instruments, or as graphical representations of measurements."
        },
        {
            "thcode": 2,
            "code": "628",
            "name": "land use and land cover",
            "scope": "The vegetation, water, natural surface, and cultural features on the land surface."
        },
        {
            "thcode": 2,
            "code": "765",
            "name": "multispectral imaging",
            "scope": "A method of remote sensing that obtains optical representations in two or more ranges of frequencies or wave lengths."
        },
        {
            "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"
        }
    ],
    "place_term": [],
    "image": [],
    "fan": []
}