[Webkit-unassigned] [Bug 257534] New: Uploading photos on iOS strips Exif GPS location data

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=257534

            Bug ID: 257534
           Summary: Uploading photos on iOS strips Exif GPS location data
           Product: WebKit
           Version: Safari 16
          Hardware: iPhone / iPad
                OS: iOS 16
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Images
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sam.webb at quiet-storm.net
                CC: sabouhallawa at apple.com

When uploading a photo via a file input on iOS 16.4, the GPS location data is being stripped from the Exif data.

Before iOS 16.4, this was preserved as long as the photo had been taken with the camera format set to Most Compatible. Since iOS 16.4, the GPS location data is removed regardless of whether the camera format is set to Most Compatible or High Efficiency.

I have also tested this on iOS 16.5, which shows the same behaviour as 16.4

There was a similar bug report earlier about Exif data being stripped more generally (https://bugs.webkit.org/show_bug.cgi?id=207088). However, the other Exif data is now kept intact - it is just the GPS location data that is now being removed.

Our use case is that we need to preserve this GPS location data in photos uploaded as part of evidence capture for UK Part L building regulations, but there would be other scenarios in which a user would want this data to remain intact.

If it has been removed for privacy reasons, perhaps it could check the existing per-website setting to allow access to location services and not strip the GPS location data if that has been allowed by the user.

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