{
    "tag": 6061,
    "title": "Digital elevation models (DEMs) of the lower Elwha River, Washington, water year 2013 to 2016",
    "pubdate": "2018",
    "sername": null,
    "series_name": null,
    "issue": "doi:10.5066\/F7PG1QWC",
    "publish": null,
    "publisher_name": null,
    "onlink": "https:\/\/cmgds.marine.usgs.gov\/catalog\/pcmsc\/DataReleases\/ScienceBase\/DR_F7PG1QWC\/Elwha_PlaneCamLidarDEMs.faq.html",
    "format": null,
    "email": null,
    "descript": "Digital elevation models (DEMs) of the lower Elwha River, Washington, were created by synthesizing lidar and PlaneCam Structure-from-Motion (SfM) data. Lidar and still digital photographs were collected by airplane during surveys from 2012 to 2016. The digital photographs were used to create a SfM digital surface model. Each DEM represents the ending conditions for that water year (for example, the 2013 DEM represents conditions at approximately September 30, 2013). The final DEMs, presented here, were created from the most recent lidar before September 30 of a given year, supplemented with an error-corrected SfM model from a low-flow summer Elwha PlaneCam flight as close to 30 September as possible. This synthetic data product was created because the aerial lidar data had gaps near the river, which the SfM data were able to close. The georeferenced DEMs were used to assess the river's responses to the removal of the Elwha and the Glines Canyon dams upstream from the study area.",
    "lang": null,
    "journal": null,
    "pwid": null,
    "originator": [
        {
            "name": "Ritchie, Andrew C.",
            "role": "Author"
        },
        {
            "name": "Curran, Christopher A.",
            "role": "Author"
        },
        {
            "name": "Magirl, Christopher S.",
            "role": "Author"
        },
        {
            "name": "Bountry, Jennifer A.",
            "role": "Author"
        },
        {
            "name": "Hilldale, Robert C.",
            "role": "Author"
        },
        {
            "name": "Randle, Timothy J.",
            "role": "Author"
        },
        {
            "name": "Duda, Jeffrey J.",
            "role": "Author"
        }
    ],
    "index_term": [
        {
            "thcode": 2,
            "code": "2041",
            "name": "digital elevation models",
            "scope": "Gridded elevation, geographically referenced to the surface of the earth, as digital data"
        },
        {
            "thcode": 2,
            "code": "375",
            "name": "field inventory and monitoring",
            "scope": "Repeated observation or sampling at a site, on a scheduled or event basis, for study and analysis.  In general, this category excludes sampling programs in which materials are obtained in the field and brought back to a laboratory for study and analysis."
        },
        {
            "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": "2046",
            "name": "image mosaics",
            "scope": "Composite images formed by overlapping existing images, typically arranged to achieve greater spatial coverage."
        },
        {
            "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": "1001",
            "name": "river reaches",
            "scope": "Continuous parts of streams between two specified points."
        },
        {
            "thcode": 2,
            "code": "1002",
            "name": "river systems",
            "scope": "Long water courses including main streams and tributaries."
        },
        {
            "thcode": 2,
            "code": "1172",
            "name": "time series datasets",
            "scope": "Digital information describing observations taken at specified time intervals.  The time interval may be regular or variable; the type of observed phenomena and the location are typically constant."
        },
        {
            "thcode": 2,
            "code": "1749",
            "name": "topographic maps",
            "scope": "Maps depicting the elevation and relief of the land surface or depth of a water body (bathymetry) in an area, usually shown using contour lines.  Typically these maps include manmade features and administrative boundaries as well as vegetation and hydrographic features."
        },
        {
            "thcode": 15,
            "code": "012",
            "name": "inlandWaters",
            "scope": "Inland water features, drainage systems and characteristics, for example rivers and glaciers, salt lakes, water utilization plans, dams, currents, floods and flood hazards, water quality, hydrographic charts, watersheds, wetlands, hydrography"
        },
        {
            "thcode": 23,
            "code": "23",
            "name": "Substrate",
            "scope": "Represents the character and composition of the surface and near surface of the sea floor in subtidal or intertidal areas, as defined in the Substrate Component of CMECS or in similar classification systems. Distributions are records of substrate characteristics based on visual or photographic inspection or on analysis of samples and cores, and they also include interpretive maps classifying areas on the basis of combinations of observations, hydrodynamic models, or geological models. Assessments include evaluations of present ecological or economic values of substrate distributions, drivers of substrate change, and functions of substrates. Predictions are the results of models or projections of future substrate distributions, values, or ecological impacts, including predicted substrate changes due to natural and human forces including erosion, accretion, sea-level change, extraction, trawling, or other factors; and they are the results of scenario-based models of substrate changes on ecological or economic values under different management strategies or other human alterations."
        },
        {
            "thcode": 61,
            "code": "165",
            "name": "river bank",
            "scope": "the land adjacent to a river."
        },
        {
            "thcode": 61,
            "code": "167",
            "name": "river channel",
            "scope": "the area between the banks of a river, where flow is generally confined except during flood stage."
        },
        {
            "thcode": 61,
            "code": "314",
            "name": "sediment deposition",
            "scope": "the effects of deposition on natural sedimentary environments."
        }
    ],
    "place_term": [],
    "image": [
        {
            "name": "https:\/\/www.sciencebase.gov\/catalog\/file\/get\/5a035e8be4b0036f58f947c7?name=2016DEM.png&allowOpen=true",
            "description": "Low-resolution sample of 2016 DEM."
        }
    ],
    "fan": []
}