{
    "tag": 15671,
    "title": "Slope Values Across Marsh-Forest Boundary in Chesapeake Bay Region, USA",
    "pubdate": "20200602",
    "sername": null,
    "series_name": null,
    "issue": "DOI:10.5066\/P9EJ6PGT",
    "publish": null,
    "publisher_name": null,
    "onlink": "https:\/\/cmgds.marine.usgs.gov\/catalog\/whcmsc\/SB_data_release\/DR_P9EJ6PGT\/SlopeTransectsandPoints.faq.html",
    "format": null,
    "email": null,
    "descript": "The marsh-forest boundary in the Chesapeake Bay was determined by geoprocessing high-resolution (1 square meter) land use and land cover data sets. Perpendicular transects were cast at standard intervals (30 meters) along the boundary within a GIS by repurposing the Digital Shoreline Analysis System (DSAS) Version 5.0, an ArcGIS extension developed by the U.S. Geological Survey. Average and maximum slope values were assigned to each transect from surface elevation data. The same values were also provided as points at the center of the transect where it crossed over the boundary. The slope values across the marsh-forest transition zone and at the boundary itself provide comprehensive data layers for local, state, and Federal managers to improve understanding of salt marsh migration. This additionally aids the U.S. Geological Survey in its effort to assess the coastal vulnerability and response of salt marsh ecosystems, including the Chesapeake Bay region.",
    "lang": null,
    "journal": null,
    "pwid": null,
    "originator": [
        {
            "name": "Molino, Grace D.",
            "role": "Author"
        },
        {
            "name": "Defne, Zafer",
            "role": "Author"
        },
        {
            "name": "Ganju, Neil K.",
            "role": "Author"
        },
        {
            "name": "Carr, Joel A.",
            "role": "Author"
        },
        {
            "name": "Guntenspergen, Glenn R.",
            "role": "Author"
        },
        {
            "name": "Walters, David C.",
            "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": "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": "474",
            "name": "geospatial datasets",
            "scope": "Collections of related digital information that are geographically referenced."
        },
        {
            "thcode": 2,
            "code": "1326",
            "name": "wetland ecosystems",
            "scope": "Ecosystems whose soil is saturated for long periods seasonally or continuously, including marshes, swamps, and ephemeral ponds.  More detailed terms for wetlands can be selected from the FGDC Wetland Classification <http:\/\/fgdc.gov\/standards\/status\/sub3_4.html>."
        },
        {
            "thcode": 2,
            "code": "1327",
            "name": "wetland functions",
            "scope": "Processes related to wetlands such as support of ecosystems, evaporation effects on weather, nutrient cycles, etc."
        },
        {
            "thcode": 15,
            "code": "002",
            "name": "biota",
            "scope": "Flora or fauna in natural environment, for example wildlife, vegetation, biological sciences, ecology, wilderness, sea life, wetlands, habitat, biological resources"
        },
        {
            "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"
        }
    ],
    "place_term": [],
    "image": [
        {
            "name": "https:\/\/www.sciencebase.gov\/catalog\/file\/get\/5e95cbd082ce172707f2528c?name=SlopeTransectsandPoints.png",
            "description": "Graphic shows slope transects and points overlaying Esri basemap."
        }
    ],
    "fan": []
}