Print Page - What is the time tolerance when geotagging

Title: What is the time tolerance when geotagging
Post by: MtnBiker on October 15, 2024, 01:45:02 AM

How near to the photo time does the gpx log information need to be.

And can that tolerance be changed?

I ask because I have a 20 minute gap in one log (phone shut off?) and I didn't move much during that time and just wanted to open up the tolerance for one batch.

I can think of other work arounds, but this one would work for this case.

Thank you

Title: Re: What is the time tolerance when geotagging
Post by: Phil Harvey on October 15, 2024, 08:05:50 AM

The GeoMaxIntSecs and GeoMaxExtSecs API options control how far ExifTool will interpolate/extrapolate in a GPX file. Read here (https://exiftool.org/geotag.html#Options) for a description of the options.

By default, GeoMaxIntSecs is set to 1800, which is 30 minutes, so ExifTool should treat your GPX track with a 20-minute gap as one continuous track.

- Phil

Title: Re: What is the time tolerance when geotagging
Post by: MtnBiker on October 16, 2024, 08:07:24 PM

Thank you Phil

I looked at another file and maybe the wrong time is being used. OM has these fields exiftool -a -u -g1 -s .../2024.09.17-14.52.53-35.gs.O.orf:

Code Select

TimeZoneOffset                  : 7
DateTimeOriginal                : 2024:09:17 14:52:53
CreateDate                      : 2024:09:17 14:52:53
OffsetTime                      : +07:00
OffsetTimeOriginal              : +07:00
OffsetTimeDigitized             : +07:00
DateTimeUTC                     : 2024:09:17 07:52:53
SubSecCreateDate                : 2024:09:17 14:52:53+07:00
SubSecDateTimeOriginal          : 2024:09:17 14:52:53+07:00
SubSecModifyDate                : 2024:09:17 14:52:53+07:00

I have this track point in the log

Code Select

 
 <trkpt lat="48.294398" lon="89.599159">
    <ele>2115.0</ele>
    <time>2024-09-17T07:53:23Z</time>
</trkpt>

The error I'm getting is this

Code Select

 
Task Terminated with exit code 1
Warning: Time is too far from nearest GPS fix 9299 1800 in File:Geotime (ValueConvInv) - /.../2024.09.17-14.52.53-35.gs.O.orf
Warning: No writable tags set from /.../2024.09.17-14.52.53-35.gs.O.orf

Is something else going wrong? I'm on macOS Sequoia and I have been having an issue with path to files in iCloud, so maybe a problem there.

I name the files based on the local time.

Title: Re: What is the time tolerance when geotagging
Post by: StarGeek on October 16, 2024, 08:20:26 PM

From the docs on geotime (https://exiftool.org/geotag.html#geotime)

QuoteIf a value for Geotime is not given, it is taken from unformatted value of DateTimeOriginal for each image (as if "-Geotime<DateTimeOriginal#" had been specified)...

So, the track as a time of 2024-09-17T07:53:23Z, but exiftool is using the DateTimeOriginal of 2024:09:17 14:52:53, which does not include the time zone.

Try adding
"-Geotime<SubSecDateTimeOriginal"
as the SubSecDateTimeOriginal does include the time zone, which allows exiftool to adjust to the UTC time of the track.

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ExifTool => The "exiftool" Application => Topic started by: MtnBiker on October 15, 2024, 01:45:02 AM