Waypoints from photos: different EXIF tag

[thomas-mc-work]

When I import some photos then I get the error saying that no location data was found in them. My exif viewer shows me they have tags like GPS Longitude, while in your source code I saw it's only looking for GPSLongitude. Is that an issue on my side? I've exported them from Darktable. I hope that this software is complying with the standards.

[Flomp]

GPS Longitude does not seem like a valid EXIF tag:
https://exiftool.org/TagNames/GPS.html

[thomas-mc-work]

Yeah, I think it was my fault. Exiftool formats the tag names with spaces on CLI ouput. Actually it is valid by the standard, which leaves the question open. Is there anything else that is expected by wanderer?

[Flomp]

Is there anything else that is expected by wanderer?

What do you mean by that?

[thomas-mc-work]

Expected in order to recognize the GPS records embedded in the picture.

[Flomp]

This is the relevant function:
https://github.com/Flomp/wanderer/blob/8e3eea6216fe8ff8355789e34a429dce338c1571/web/src/lib/components/waypoint/waypoint_modal.svelte#L79

So these four tags need to be present:
"GPSLatitude", "GPSLatitudeRef", "GPSLongitude", "GPSLongitudeRef"

[thomas-mc-work]

Here is an example output of an image:

$ exiftool -j DSC09820.jpg | grep GPS
  "GPSVersionID": "2.2.0.0",
  "GPSLongitude": "15 deg 57' 12.87\" E",
  "GPSLatitude": "45 deg 47' 57.43\" N",
  "GPSLatitudeRef": "North",
  "GPSLongitudeRef": "East",
  "GPSPosition": "45 deg 47' 57.43\" N, 15 deg 57' 12.87\" E",

When I try to import it then I get the notification DSC09820.jpg: no-gps-data-in-image (using version 0.17.0 now).

[thomas-mc-work]

Another image example for debugging:

$ exiftool -j bratislava.jpg | grep GPS
  "GPSVersionID": "2.2.0.0",
  "GPSLongitude": "17 deg 6' 3.88\" E",
  "GPSLatitude": "48 deg 9' 5.14\" N",
  "GPSLatitudeRef": "North",
  "GPSLongitudeRef": "East",
  "GPSPosition": "48 deg 9' 5.14\" N, 17 deg 6' 3.88\" E"

[Flomp]

This seems to be an upstream problem of the exif library we use:
https://stackblitz.com/edit/js-63co72k4?file=index.html

The library does not seem to be maintained anymore, and I can't see a simple fix from briefly looking through the source code.

https://github.com/exif-js/exif-js/blob/51a8f7d2f3aa71cb03463c84088067c9a4ebe8cb/exif.js#L821

[Vertux]

Since I just ran into the same issue in version 0.19.1 (fresh Docker installation), I did some research and came across the JavaScript library ExifReader, which is actively maintained and being further developed. Perhaps this could be a way to resolve the problem described.