Quoting from https://github.com/mapillary/mapillary_tools/blob/master/README.md, the section
Derive image direction and Upload
-
Derive image direction (image heading or camera angle) based on image latitude and longitude. If images are missing direction*, the direction is derived automatically, if direction is present, it will be derived and overwritten only if the flag
--interpolate directionsis specified. -
As with the GoPro9, where the GPS Img Direction entry is lacking in the EXIF-section
Please refer to my sequence of 9 June, where the ways were captured in both directions, yet the fans all point due north.
As an aside, the lacking parts of sequence issue - posted as Page not found - is also present here, and on this occasion the pics were uploaded several days ago - hence well after the previous issue was solved, and don’t appear in the OSM iD editor either.