{
    "tag": 12790,
    "title": "NORCAL2002 - Vectorized Shoreline of Northern California Derived from 2002 Lidar Source Data",
    "pubdate": "2006",
    "sername": null,
    "series_name": null,
    "issue": "2006-1251",
    "publish": null,
    "publisher_name": null,
    "onlink": "https:\/\/cmgds.marine.usgs.gov\/catalog\/pcmsc\/SeriesReports\/OFR\/OFR_2016-1251\/norcal2002.shp.faq.html",
    "format": null,
    "email": null,
    "descript": "There are critical needs for a nationwide compilation of reliable shoreline data.  To meet these needs, the U.S. Geological Survey (USGS) has produced a comprehensive database of digital vector shorelines by compiling shoreline positions from pre-existing historical shoreline databases and by generating historical and modern shoreline data.  Shorelines are compiled by state and generally correspond to one of four time periods: 1800s, 1920s-1930s, 1970s, and 1998-2002.  Each shoreline may represent a compilation of data from one or more sources for one or more dates provided by one or more agencies.  Details regarding source are provided in the 'Data Quality Information' section of this metadata report.  Shoreline vectors derived from historic sources (first three time periods) represent the high water line at the time of the survey, whereas modern shorelines (final time period) represent the mean high water line.",
    "lang": null,
    "journal": null,
    "pwid": null,
    "originator": [
        {
            "name": "Hapke, Cheryl J.",
            "role": "Author"
        },
        {
            "name": "Reid, David",
            "role": "Author"
        }
    ],
    "index_term": [
        {
            "thcode": 2,
            "code": "2047",
            "name": "beach nourishment",
            "scope": "Transfer of sand from offshore areas to resupply beach areas that have been eroded."
        },
        {
            "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": "353",
            "name": "erosion",
            "scope": "The process whereby materials of the earth's crust are loosened, dissolved, or worn away and simultaneously moved from one place to another."
        },
        {
            "thcode": 2,
            "code": "648",
            "name": "lidar",
            "scope": "Light detection and ranging, an airborne, spaceborne or ground-based laser-ranging technique commonly used for acquiring high-resolution topographic data."
        },
        {
            "thcode": 2,
            "code": "2072",
            "name": "shoreline accretion",
            "scope": "Seaward migration of the shoreline resulting from the addition of earth materials."
        },
        {
            "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": 61,
            "code": "14",
            "name": "coastal processes",
            "scope": "oceanographic and geologic processes that cause changes to the shoreline and coastal zone."
        },
        {
            "thcode": 61,
            "code": "57",
            "name": "effects of coastal change",
            "scope": "changes in coastal processes, landscapes, and ecosystems."
        },
        {
            "thcode": 61,
            "code": "68",
            "name": "shoreline accretion",
            "scope": "seaward migration of the shoreline resulting from the addition of earth materials."
        },
        {
            "thcode": 61,
            "code": "69",
            "name": "shoreline erosion",
            "scope": "landward migration of the shoreline resulting from the removal of earth materials."
        },
        {
            "thcode": 62,
            "code": "GC-045",
            "name": "Continental\/Island Shore Complex",
            "scope": "Physiographic Setting: This feature includes the land-water interface zone and contains geoforms across a diversity of scales. ..."
        }
    ],
    "place_term": [],
    "image": [],
    "fan": []
}