The GPX 1.0 format had a <course> tag, but it was removed from GPX 1.1: GPX: the GPS Exchange Format. You could try adding
to each <trkpt> record on the chance that LR might recognize it. I think LR uses GPX 1.1, not 1.0, but I'm not positive.
However, note that the GPS Direction field is intended to represent the direction the camera was facing, whereas the GPX 1.0 <course> tag represents the direction along the track the GPS device is headed, which is not necessarily the same thing. The <course> you're obtaining from your database is probably the direction the GPS device was headed, not the direction the camera was pointed (unless you've got a camera that's always forward-facing).
Given the difference in intended use between GPS Direction and <course>, I'm skeptical that LR would fill in Direction from <course>. But worth a try.
Thanks for your reply.
I've already tried the tag. It doesn't work in LR with GPX1.1. I'll try to say that the GPX file is GPX1.0 and see if that works.
Thanks again for the info.
I tried to specify GPX 1.0 in the GPX file, but Lightroom still didn't recognize the tag.
It may come down to taking a duplicate picture with my iPhone and then copying the direction tag data to the raw files that point in the same direction.
Again, thanks for your input.
Thanks. I'll look into them.