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>