Correct, but the metadata would still show a detection of a 60’ decline followed by a 40’ incline resulting in an elevation change of 20’. The maths still need to be math’ed in the back end of the fitness app. It wouldn’t just magically detect a 20’ elevation change. It would detect those changes over time. However, I am not a forensic scientist, this is just my understanding of how these apps work, as I’ve dealt with GPS tracking apps in my line of work, which admittedly may be different than fitness apps. MOOIt’s a fitness app - it’s detecting elevation gain/stairs climbed. It’s not going to say “you walked down stairs and back up stairs, so that cancels out”, it’s going to count the stairs you walked up even though it might be a net 0. Similarly, they started out on the same level as the bridge. They went down the hill, then up 20 feet. The 20 feet gets logged.
JMO