You might be interested in some code I wrote to write the image meta data for Facebook/Flickr etc. directly via JavaScript when you save the image instead of using something external like exiftool.

I capture scenes from Second Life and let you view them using three.js - I added an option to export an equirectangular image that has the embedded meta-data I mentioned so you can upload it directly to Facebook etc. and it;ll work.

Example here: http://callumprentice.github.io/apps/360_snapshot_viewer/ind... - click on the "twirly arrow" icon at the top :)

Code is here: https://github.com/callumprentice/callumprentice.github.io/t...