Update GPS information

[LayneSeely]

Hi Gang:

Newbie here trying to find a solution to changing the GPS information from my drone (DMS) to UTM (Northings & Eastings).  I have a Python script that I have written that creates a CSV file reporting the DMS values.  I have run this CSV file through another program that converts these values into UTM coordinates.  Now what I want to do is update the actual photograph's coordinates with my UTM coordinates - can I do this in batch (i.e., for a complete folder) with this tool?  If this is possible, how would I do this?  Is it possible through Python?

I have attached output from this tool and what I want it to go to for reference for the same photo.

Layne

[Phil Harvey]

Hi Layne,

This ExifTool config file allows you to convert GPS coordinates to UTM when reading from file.

...but where do you plan on storing them if you want to write them back to the file?  EXIF doesn't support UTM coordinates.  (MIE format does but there's not much support for that.)

- Phil

[LayneSeely]

Thank you for your reply.  I did not know if I could simply over-write the data in the image.  If I could add new data(i.e., new attributes) then maybe it would work.

At this point, at least now I know that EXIF V. 0230 doesn't support UTM coordinates.  One option down - many more to go.

[LayneSeely]

hey Phil:

With a change to my software, I now have output coordinates in the right format.  I think I should now be able to update the Lat, Long and Elev attributes for each photo in my folder.  I'd rather not do this one-by-one as often there are hundreds to thousands of photos per drone flight; thus, I'm thinking of doing this programmatically - likely with Python.  Feeding into a python script the necessary variables by reading in a single row at a time is straight forward, but what would the ExifTool command be?

[Phil Harvey]

I don't know enough about what you want to do to be able to give you a command.

Generally, the commands to do similar things are:

1. Extract GPS from video to GPX file:

exiftool -p gpx.fmt -ee VIDEOFILE > out.gpx

2. Geotag photos based on extracted GPX:

exiftool -geotag out.gpx -ext jpg DIR

- Phil