The images acquired with the camera were geotagged and processed to add additional information required by the USGS to the EXIF headers using ExifTools (https://exiftool.org/
, version: 12.06), and the files were renamed to a unique identifier using Namexif (http://www.digicamsoft.com/softnamexif.html
, version 2.1) to avoid any possibility of duplicate names. These steps are described here.
1. Using the GNSS navigation from the previous step, ExifTools was used to tag each photo with the following tags: Credit, Copyright, UsageTerms, ImageDescription, Artist, GPSAreaInfo, GPSMapDatum, GPSLatitude, GPSLongitude, and GPSAltitude stored in a csv file with the command:' -exiftool -csv="C:\directory\name\Geotags_EXIF.csv" C:\directory\name\of\photos *.jpg
The first row of the CSV are the tag names; the first column is SourceName (unique image names). Keywords were added with the following command in the directory with all the photographs: exiftool -keywords="aerial imagery" -keywords="Head of the Meadow Beach" -keywords=Massachusetts -keywords="2022-015-FA" -keywords=USGS -overwrite_original *.jpg
To read out the photo information to a csv when in the directory with the photos, the command is: exiftool -csv *.JPG > directory/name/allheaders_out.csv
2. All the JPEG images were renamed with Namexif (https://us.digicamsoft.com/softnamexif.html
v 2.2 accessed April 2020) to ensure unique filenames and compliance with the USGS Coastal and Marine Hazards and Resources Program's best practices for image naming convention. Images were renamed with the field survey ID prefix; flight number, and ID that distinguishes USGS cameras by make/camera number, the image acquisition date, coordinated universal time (UTC) in ISO8601 format, and a suffix with the original image name. For example, image name '2022015FA_f01s6000_20220310T165822Z_image####.jpg', 2022015FA is the survey ID, f01 is the flight number, s6000 is the camera make (SONY) and model (6000), and 20220310 is the UTC date in the format YYYYMMDD. A 'T' is used to separate UTC date from UTC time in format HHMMSS followed by a Z, and image####.jpg is the original raw photo name appended to the end of the new filename. Because the camera time was collected in EST the time in Namexif was shifted +4:00:00 to be in UTC.