{
    "tag": 17428,
    "title": "Marsh Shorelines of the Massachusetts Coast from 2013-14 Topographic Lidar Data",
    "pubdate": "2018",
    "sername": null,
    "series_name": null,
    "issue": "DOI:10.5066\/F72R3QXR",
    "publish": null,
    "publisher_name": null,
    "onlink": "https:\/\/cmgds.marine.usgs.gov\/catalog\/whcmsc\/SB_data_release\/DR_F72R3QXR\/MA_marsh_edge_2013_2014.faq.html",
    "format": null,
    "email": null,
    "descript": "The Massachusetts Office of Coastal Zone Management (CZM) launched the Shoreline Change Project in 1989 to identify erosion-prone areas of the  Massachusetts coast. Seventy-six maps were produced in 1997 depicting a statistical analysis of shoreline change on ocean-facing shorelines from the mid-1800s to 1978 using multiple data sources.  In 2001, a 1994 shoreline was added.  More recently, in cooperation with CZM, the U.S. Geological Survey (USGS) delineated a new shoreline for Massachusetts using color aerial ortho-imagery from 2008 to 2009 and topographic lidar data collected in 2007. This update included a marsh shoreline, which was defined to be the tonal difference between low- and high-marsh seen in ortho-photos.  Further cooperation between CZM and the U.S. Geological Survey (USGS) has resulted in another update in 2018, which includes beach shorelines, marsh shorelines and dune parameters, all of which were calculated from 2013-14 topographic lidar data. This metadata file describes the marsh shoreline that is part of the 2018 update.  The marsh shoreline was defined to be the steep slope found at the seaward edge of the marsh vegetation.  This definition was used because the marsh edge is the preferred shoreline indicator for computing rates of change and making position forecasts.",
    "lang": null,
    "journal": null,
    "pwid": null,
    "originator": [
        {
            "name": "Farris, Amy S.",
            "role": "Author"
        }
    ],
    "index_term": [
        {
            "thcode": 2,
            "code": "1799",
            "name": "coastal processes",
            "scope": "Processes unique to coastal areas including longshore transport, beach erosion, storm surge, shoreline change, delta formation, barrier island migration, beach stabilization by vegetation"
        },
        {
            "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": "472",
            "name": "geospatial analysis",
            "scope": "Detailed study of information such as measurements, counts, and computations as a function of geographical location."
        },
        {
            "thcode": 2,
            "code": "474",
            "name": "geospatial datasets",
            "scope": "Collections of related digital information that are geographically referenced."
        },
        {
            "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": "007",
            "name": "environment",
            "scope": "Environmental resources, protection and conservation, for example environmental pollution, waste storage and treatment, environmental impact assessment, monitoring environmental risk, nature reserves, landscape, water quality, air quality, environmental modeling"
        },
        {
            "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": "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"
        },
        {
            "thcode": 61,
            "code": "148",
            "name": "marsh",
            "scope": "a wetland characterized by herbaceous plants."
        },
        {
            "thcode": 61,
            "code": "177",
            "name": "shore",
            "scope": "the boundary between an ocean, sea, or lake and the adjacent dry land."
        },
        {
            "thcode": 62,
            "code": "GC-120",
            "name": "Marsh Platform",
            "scope": "Geoform: The flat, often thick, accumulation of peat that supports emergent marsh vegetation. It is commonly dissected by tidal creeks, and it is occasionally buried and re-exposed through the action of beach erosion and new inlet development."
        }
    ],
    "place_term": [],
    "image": [
        {
            "name": "https:\/\/www.sciencebase.gov\/catalog\/file\/get\/5aabdfafe4b081f61aaf00d5?name=MA_marsh_edge_browseGraphic.png",
            "description": "Image showing the mean tide level contour, calculated marsh edge, and a profile example of calculating the marsh edge."
        }
    ],
    "fan": []
}