I modestly (on occasion) set tracktype=* based on imagery, but only using higher-quality imagery where I have high confidence I can quite accurately do so. On those few occasions where I later visit the site / track and am able to glean how accurate my tagging was, I've either never had to change it to a different value or it was such a long time between setting and visiting that it was one value different (higher based on increased use, lower based on decreased use and falling into reverting to the landscape). So, done with skill, this sort of armchair mapping can be and is done accurately quite frequently, in my experience of both doing this and observing others doing this (and reading the confirmation of that here and now).
That is me, your mileage may vary, though as others have said similar (that they do this), I, too, would refrain from performing a revert. If, on the other hand, you are certain that _individual_ tracks are clearly wrong, I'd say go ahead and change those one-at-a-time, but a wholesale revert, no, that seems like overkill. SteveA _______________________________________________ talk mailing list talk@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk