Reader-added tags include "No, that's not the point", "Awww, what a dejecting response", and the slight variant "A person for whom it's written 'manga artist' but pronounced 'jack of all trades'".

Sanae said:

Is the altitude correct?

Kogasa responded:

That's not the point...

No, that is exactly the point...

It's completely useless if those numbers are garbage.

It's probably using just accelerometer data to estimate position, which means it's probably falling prey to integration drift.

Etnaz said:

No, that is exactly the point...

It's completely useless if those numbers are garbage.

If it hasn't been calibrated, it can register an accurate change in altitude without actually knowing the altitude where it started.