Diver-Based Structure-from-Motion imagery from coral reef restoration surveys in the Lower Florida Keys: July 2022 and July 2023

IMAGE ACQUISITION At each site, except for Summerland Ledges, 10-12 approximately 10 x 2 m photographic transects were surveyed by Self-Contained Underwater Breathing Apparatus (SCUBA) divers using a downward facing Canon® PowerShot S120 camera in an underwater housing set to collect RAW image format in continuous shoot mode. Summerland Ledges was designated as an experimental restoration site consisting of two 10 x 10 m restored plots and one 10 x 10 m control plot. The two restored plots at Summerland Ledges were surveyed 2m from the reef base using a dual Nikon® D7000 digital single-lens (DSLR) camera system, and the control plot was surveyed using a Canon® EOS R at the surface. The number of transects varied per site depending on the availability of restored or control reef. All images were collected 1-2m from the reef base using a double-lawnmower swim pattern ensuring 70-80% forward and lateral overlap between images. Prior to image acquisition, a diver used a metric field tape to delineate the sampling area and then placed 3-4 coded 25-centimeter (cm) scalebar targets evenly throughout the transect areas to provide accurate scale for models.

IMAGE CONVERSION After acquisition, the RAW images were converted to Tagged Image File Format (.tif) files using Adobe Photoshop's (version 25) Image Processor tool which can be accessed by navigating to File>Scripts>Image Processor>Select Location>Save as TIFF with LZW compression.

IMAGE HEADERS Exchangeable image file format (EXIF) image headers were added to each image using Phil Harvey’s ExifTool (version 12.5.10). All information in the headers are the same among all images, aside from the EXIF:ImageDescription, EXIF:GPSLatitude and EXIF:GPSLongtitude, EXIF:Make, EXIF:Model, and EXIF:DateTimeOriginal, as that information varies per site. An example script used to populate the images is as follows: exiftool -IPTC:Credit="U.S. Geological Survey, Mote Marine Laboratory" -IPTC:Contact="gs-g-spcmsc_data_inquiries@usgs.gov" -EXIF:Copyright="Public Domain" -XMP:AttributionURL="https://doi.org/10.5066/P1WHKTRD" -XMP:ExternalMetadataLink="https://www1.usgs.gov/pir/api/identifiers/USGS:0cb09b6b-7c38-4c6f-a1dc-afc4033ab4be" -EXIF:GPSAreaInformation="station coordinates obtained from handheld GPS; individual images are not georeferenced" -EXIF:GPSMapDatum="EPSG:4326 (WGS 84)" -XMP:UsageTerms="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 for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty." -EXIF:ImageDescription="https://cmgds.marine.usgs.gov/fan_info.php?fan=2022-324-FA; Diver-based Structure-from-Motion image data from USGS field activity 2022-324-FA" EXIF:Artist="USGS St. Petersburg Coastal and Marine Science Center"-EXIF:GPSLatitude=24.53055 -EXIF:GPSLatitudeRef="N" -EXIF:GPSLongitude=-81.48781 -EXIF:GPSLongitudeRef="W" -XMP:PreservedFileName<Filename -XMP-photoshop:Credit<IPTC:Credit -XMP-iptcCore:CreatorWorkEmail<IPTC:Contact -XMP-dc:Rights<EXIF:Copyright -XMP-dc:Description<EXIF:ImageDescription -XMP-exif:all<GPS:all -XMP-exif:GPSLatitude<Composite:GPSLatitude -XMP-exif:GPSLongitude<Composite:GPSLongitude -XMP-exif:GPSDateTime<Composite:GPSDateTime -XMP-photoshop:DateCreated<EXIF:DateTimeOriginal -XMP-xmp:ModifyDate<EXIF:ModifyDate -XMP-dc:Creator<EXIF:Artist -XMP-tiff:Make<EXIF:Make -XMP-tiff:Model<EXIF:Model -m -P -progress -overwrite_original *.tif Additional headers were added to preserve image filenames and duplicate tags: exiftool "-XMP:PreservedFilename<Filename" -overwrite_original -P *.TIF exiftool "-XMP-photoshop:Credit<IPTC:Credit" "-XMP-iptcCore:CreatorWorkEmail<IPTC:Contact" "-XMP-dc:Rights<EXIF:Copyright" "-XMP-dc:Description<EXIF:ImageDescription" -overwrite_original -P *.TIF To read out the imagery header information to a comma-delimited text file the command is: 'exiftool -csv *.tif > allheaders.csv'. Specific tags can also be specified with this command.