GPSAltitude value addition

[BMR_Rogers]

Hi there,

I am trying to add extra height to my GPSAltitude tag - due to an inaccurate GPSAltitude data collection

I have reset successfully the GPSAltitude tag to reflect what is held in the Xmp:RelativeAltitude field (70.00 m)

I am now trying to add the take off height of the drone 210.004 m to this value.

I have tried the following command with out any success  via the 'ExifTool direct' option in ExifToolGUI

-n -tagsFromFile @ -GPSAltitude+=210.004 *.*


Is it possible to add sums this way? 

Thanks for any help.

[Phil Harvey]

Try this:

-gpsaltitude+=210.004

I don't think you are supposed to include the file names when using the "ExifTool Direct" feature of ExifToolGUI.

- Phil

[BMR_Rogers]

Oohh - that did the trick.

Thanks very much Phil.