{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Frank L. Engel", "hasEmail": "mailto:fengel@usgs.gov"}, "description": "A series of field measurements of surface water velocity derived from video and Doppler velocity radar collected by small unoccupied aircraft systems (sUAS) and portable sensors were collected at seven locations in Colorado, USA, during the summer of 2023. The measurements were utilized to compute surface velocity and discharge using the Probability Concept, Large-Scale Particle Image Velocimetry (LSPIV), and Space-Time Image Velocimetry (STIV) methods. This data release includes the original videos, radar spectra, and ancillary data necessary to produce the surface water velocity and streamflow results. Data are grouped into sections (child items) based on the data type and purpose:\n<ul>\n<li><strong>Ancillary Scripts: </strong> this child item contains Microsoft Windows batch and Python script files that reproduce the processing steps used for specific files associated with image calibration, collating video metadata, and extraction of velocity data from associated hydroacoustic discharge measurements.</li>\n<li><strong>Calibration Images: </strong> this child item contains images with labeled ground control points and associated pixel coordinate locations for each dataset. The images are used to calibrate image velocimetry results into real-world units (meters, for example). The images also indicate the pixel positions corresponding to the location of the streamflow measurement cross-section used for each dataset.</li>\n<li><strong>Cross Section Geometry: </strong> this child item contains the bathymetry cross-sectional survey information for each dataset.</li>\n<li><strong>Discharge Measurements: </strong> this child item contains the raw acoustic Doppler velocity profiler (ADCP) and acoustic Doppler velocimeter (ADV) measurements collected by U.S. Geological Survey hydrographers at each site to validate image and Doppler radar velocimetry results.</li>\n<li><strong>Ground Control: </strong> this child item contains point correspondence information for each field site. The point real-world coordinates and their respective pixel locations are included.</li>\n<li><strong>Radar Spectra: </strong> this child item contains Doppler velocity radar spectra values for selected field sites.</li>\n<li><strong>Videos: </strong> this child item contains the raw videos captured by sUAS for selected field sites.</li>\n</ul>\nEach field site is abbreviated in various files in this data release. File and folder names quickly identify which site a particular file or dataset represents. The following abbreviations are used:\n<ul>\n<li>ACS: Anthracite Creek at Somerset, Colorado, USA</li>\n<li>BRA: Blue River below Dillon, Colorado, USA (collected in August 2023)</li>\n<li>BRJ: Blue River below Dillon, Colorado, USA (collected in June 2023)</li>\n<li>CRG: Colorado River below Glenwood Springs, Colorado, USA</li>\n<li>CRR: Colorado River above Roaring Fork River at Glenwood Springs, Colorado, USA</li>\n<li>ERW: Eagle River below Milk Creek near Wolcott, Colorado, USA</li>\n<li>MCA: Maroon Creek near Aspen, Colorado, USA</li>\n<li>RFG: Roaring Fork at Glenwood Springs, Colorado, USA</li>\n</ul>\nThe ERW and RFG sites contain radar spectra but not associated image velocimetry data, and the CRG site contains image velocimetry data but no associated radar spectra.", "distribution": [{"@type": "dcat:Distribution", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.656609ebd34e3aa43a43f6cb.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}, {"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9DOXMW3", "description": "Landing page for access to the data", "format": "XML", "mediaType": "application/http", "title": "Digital Data"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_656609ebd34e3aa43a43f6cb", "keyword": ["inlandWaters", "drone", "unoccupied aircraft system", "sUAS", "Doppler radar velocimetry", "Glenwood Springs, Garfield County, Colorado, United States of America", "Aspen, Pitkin County, Colorado, United States of America", "Colorado River, Garfield County, Colorado, United States of America", "aerial video", "stream-gage measurement", "Roaring Fork River, Garfield County, Colorado, United States of America", "unmanned aircraft system", "Water Resources", "Eagle River, Eagle County, Colorado, United States of America", "Maroon Creek, Pitkin County, Colorado, United States of America", "remote sensing", "Remote Sensing", "hydrographic datasets", "space-time image velocimetry", "probability concept", "USGS:656609ebd34e3aa43a43f6cb", "Dillon, Summit County, Colorado, United States of America", "image velocimetry", "Blue River, Summit County, Colorado, United States of America", "Wolcott, Eagle County, Colorado, United States of America", "videography", "large-scale particle image velocimetry", "streamflow", "USGS Science Data Catalog (SDC)", "Somerset, Gunnison County, Colorado, United States of America", "acoustic doppler current profiling", "stream discharge", "Anthracite Creek, Gunnison County, Colorado, United States of America"], "modified": "2025-12-12T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-107.3367, 38.9543, -106.0666, 39.6255", "theme": ["geospatial"], "title": "Unoccupied Aerial System-mounted image velocimetry and Doppler velocity radar data for computation of river velocity and discharge collected at seven locations in Colorado in 2023"}