Frank L. Engel Ammon Cadogan Jennifer G. Duan 20220214 publication https://doi.org/10.5066/P9H2MM1M This child item contains images associated with each field site annotated with labeled calibration marks and associated pixel locations for each dataset. The images can be used to calibrate image velocimetry results into real world units (meters, for example). <br> Each Field Site is abbreviated in various files in this data release. File and folder names are used to quickly identify which site a particular file or dataset represents. The following abbreviations are used: <ul> <li>ACR: Androscoggin River, Auburn, Maine, USA</li> <li>AFR: Agua Fria River, near Rock Springs, Arizona, USA</li> <li>CCC: Coachella Canal above All-American Canal Diversion, California, USA</li> <li>CMC: Cochiti East Side Main Channel, near Cochiti, New Mexico, USA</li> <li>GLR: Gila River near Dome, Arizona, USA</li> <li>RMC: Reservation Main Canal near Yuma, Arizona, USA</li> <li>SMC: Sile Main Canal (at head) at Cochiti, New Mexico, USA</li> <li>WMD: Wellton-Mohawk Main Outlet Drain near Yuma, Arizona, USA</li> </ul> These data were collected as part of a series of field experiments to test the validity of using small unoccupied aircraft systems (sUAS) to collect stream surface velocity and discharge measurements. The images here enable calibration of image processing results into real world units. 20210920 Date Created Complete None planned -114.94343 -70.2241 44.0947 32.71551 None USGS Science Data Catalog (SDC) inlandWaters remote sensing stream-gage measurement streamflow stream discharge hydrographic datasets acoustic doppler current profiling videography aerial video sUAS unmanned aircraft system unoccupied aircraft system drone Remote Sensing Water Resources USGS Metadata Identifier USGS:61eb316fd34e8b818ada9144 Geographic Names Information System Auburn, Androscoggin County, Maine, USA Androscoggin River, Androscoggin County, Maine, USA Great Falls, Androscoggin County, Maine, USA Coachella Canal, Imperial County, California, USA Imperial Valley, Imperial County, California, USA Cochiti Lake, Reservoir, Sandoval County, New Mexico, USA Cochiti Main Canal, Cochiti Lake, Sandoval County, New Mexico, USA Gila River, Yuma County, Arizona, USA Kinter, Yuma County, Arizona, USA Reservation Main Canal, Imperial County, California, USA Agua Fria River, Maricopa County, Arizona, USA None. Please see 'Distribution Info' for details. None. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations. Frank L. Engel U.S. Geological Survey, WATER Geographer mailing address

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San Antonio TX 78249 US 210-691-9213 210-691-9270 fengel@usgs.gov No accuracy tests performed on the videos or images other than to ensure videos were recorded in view of measurable calibration points in the field. Data are logically consistent The data are complete Accuracy of the measurements of distance between calibration marks was checked using a rod and survey measuring tape. No vertical accuracy tests performed. William Thielicke 20211025 2.55 application/service https://github.com/Shrediquette/PIVlab Digital and/or Hardcopy 20211025 publication date PIVLab Software Software used to process videos During data collection at each field site, a tape measure was stretched between two marked points in view of the sUAS camera. The measurements of this distance were noted.For the Androscoggin River (ACR file prefix), a True Pulse 800 laser range finder was used to measure the distance between points. 20190518 The video was used to extract a calibration image for each field site. The real-world distance between the two calibration points was annotated onto each calibration image. 20220120 Using the PIVLab software, the pixel coordinates of the two calibration marks was digitized for each calibration image. PIVLab Software 20220120 Frank Engel U.S. Geological Survey, WATER Geographer mailing address

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San Antonio TX 78249 US 210-691-9213 210-691-9270 fengel@usgs.gov The calibration image for each field site was exported from the PIVLab results and saved as a file. 20220120 Frank Engel U.S. Geological Survey, WATER Geographer mailing address

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San Antonio TX 78249 US 210-691-9213 210-691-9270 fengel@usgs.gov See the Process Steps section for information about how calibration images were constructed. The following image files are included: ACR_Calibration_Image.png AFR_Calibration_Image.png CCC_Calibration_Image.png CMC_Calibration_Image.png GLR_Calibration_Image.png RMC_Calibration_Image.png SMC_Calibration_Image.png WMD_Calibration_Image.png PNG (Portable Network Graphics) Specification, Version 1.2, available at: http://www.libpng.org/pub/png/spec/1.2/PNG-Contents.html U.S. Geological Survey GS ScienceBase mailing address

Denver Federal Center, Building 810, Mail Stop 302

Denver CO 80225 United States 1-888-275-8747 sciencebase@usgs.gov Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Digital Data https://doi.org/10.5066/P9H2MM1M None 20220214 Frank L. Engel U.S. Geological Survey, WATER Geographer mailing address

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San Antonio TX 78249 US 210-691-9213 210-691-9270 fengel@usgs.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-012-2002