{
    "tag": 21119,
    "title": "Lidar point clouds (LPC), elevation models, GPS data, image mosaics, and aerial images from natural color (RGB) camera collected during UAS operations at Lower Darby Creek, Darby Township, Pennsylvania, March 2025",
    "pubdate": "20260602",
    "sername": null,
    "series_name": null,
    "issue": "DOI:10.5066\/P13TQ8E7",
    "publish": null,
    "publisher_name": null,
    "onlink": "https:\/\/cmgds.marine.usgs.gov\/catalog\/whcmsc\/SB_data_release\/DR_P13TQ8E7\/2025011FA_Clearview_Mar_Metadata.faq.html",
    "format": null,
    "email": null,
    "descript": "The U.S. Geological Survey deployed small uncrewed aircraft systems (sUAS) to collect aerial remote sensing data across sites within the Lower Darby Creek Superfund Site ~5 miles outside of Philadelphia, PA in March and August of 2025.  March datasets include aerial images from natural color (RGB) and raw lidar of the Clearview Landfill superfund site.  August datasets include aerial images from natural color (RGB), multispectral sensors, and raw lidar over the Clearview Landfill.  These datasets were processed to produce high resolution digital elevation models (DEM), image mosaics, and lidar point clouds (LPC).  Black and white cross-coded ground control points (GCPs) were surveyed using Real Time Kinematic (RTK) GPS and RTK-GPS enabled AeroPoints to georeference the model and orthomosaics during post-processing. The elevation and imagery products were produced to help partners at the Environmental Protection Agency (EPA) acquire accurate elevation data for target monitoring sites during the winter \"leaf-off\" period (March) and the peak growing season (August). Future data collections are planned to support long-term monitoring of landscape change resulting from remediation efforts and potential storm impacts.",
    "lang": null,
    "journal": null,
    "pwid": null,
    "originator": [
        {
            "name": "Millo, Amit",
            "role": "Author"
        },
        {
            "name": "Brosnahan, Sandra M.",
            "role": "Author"
        },
        {
            "name": "Ackerman, Seth D.",
            "role": "Author"
        },
        {
            "name": "Over, Jin-Si R.",
            "role": "Author"
        },
        {
            "name": "Cramer, Jennifer M.",
            "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": "474",
            "name": "geospatial datasets",
            "scope": "Collections of related digital information that are geographically referenced."
        },
        {
            "thcode": 2,
            "code": "492",
            "name": "GPS measurement",
            "scope": "Determination of distance and location using instruments receiving signals from the Global Positioning System, a system of satellites for identifying earth locations."
        },
        {
            "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": "2078",
            "name": "navigational data",
            "scope": "Geospatial data indicating the locations of instruments, vessels, aircraft, or other vehicles used to collect scientific observations.  These data include horizontal coordinates in sequence, and may include time or vertical position."
        },
        {
            "thcode": 2,
            "code": "981",
            "name": "remote sensing",
            "scope": "Acquiring information about a natural feature or phenomenon, such as the Earth's surface, without actually being in contact with it. USGS remote sensing is usually carried out with airborne or spaceborne sensors or cameras."
        },
        {
            "thcode": 2,
            "code": "2265",
            "name": "structure from motion",
            "scope": "Mathematical analysis, using photogrammetric principles, of multiple images that depict the same subject from different angles to derive geometrical information and relationships in three-dimensional space that are not inherent in any single image. Often used for deriving land elevation or large scale orthoimagery from a collection of aerial photographs."
        },
        {
            "thcode": 2,
            "code": "1281",
            "name": "visible light imaging",
            "scope": "Remote sensing methods using electromagnetic radiation which is visible to the human eye to react with the coating on a photographic plate or film."
        },
        {
            "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": "010",
            "name": "imageryBaseMapsEarthCover",
            "scope": "Base maps, for example land\/earth cover, topographic maps, imagery, unclassified images, annotations, digital ortho imagery"
        }
    ],
    "place_term": [],
    "image": [
        {
            "name": "https:\/\/www.sciencebase.gov\/catalog\/file\/get\/69839c8ab66b01367d7ecd96?name=2025MarchDarbyChildPage.jpg&allowOpen=true",
            "description": "Sample of data collected during March 2025 field session."
        }
    ],
    "fan": []
}