Not sure about accuracy. Check this post:
https://community.pix4d.com/t/5310-DJI-FW-update-1-07-0060-changes-EXIF-altitude-data-again-
Not sure about accuracy. Check this post:
https://community.pix4d.com/t/5310-DJI-FW-update-1-07-0060-changes-EXIF-altitude-data-again-