Hi everybody, i would like to ask some advice on how to change some specific data (GPS altitude and altitude reference) in a set of pictures took with my dji drone, if it's possible I would prefer to offset all those values to obtain a quite precise elevation instead of setting the same altitude for all images to prevent the flattening of the entire dataset.
For example, to subtract 20.5 meters:
exiftool -gpsaltitude+=-20.5 DIR
- Phil
The relevant part of the documentation under the
-TAG[+-^]=[VALUE] option (https://exiftool.org/exiftool_pod.html#TAG---VALUE)
Quote+= may also be used to increment numerical values (or decrement if VALUE is negative),
Note that to subtract, you have to "add" a negative number as in Phil's example. That's because
-= is a different operation. Directly after the above documentation is
Quoteand -= may be used to conditionally delete or replace a tag
Thank you!