EXIF refers to exchangeable image file format, a standard for storing data in images.
This can be considered as metadata about the image, annotating the location, timestamp, type of device used to capture the image, and more. Typical cameras (including smartphones) save EXIF data automatically, but the specifics depend on the device—for instance, the device needs to have GPS in order to write geolocation information into the EXIF data upon capture. There are programs that enable to add information to EXIF post-capture (e.g. add geotags to images).
To upload an image to Mapillary, the minimal information required in the EXIF data is the GPS position and the capture time of the images.
- GPS position—both GPS GPSLongitude and GPS GPSLongitude are required.
- Capture time—one of the following fields is required: EXIF DateTimeOriginal, EXIF DateTimeDigitized, EXIF DateTime, or GPS GPSDate.