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mohnid
Hi,

I am geotagging my pics from a trip to Jordan back at home.

When I load the pictures from my Aperture Library HoudahGeo asked for the timezone and shows the correct timezone of jordan/amman for the pictures. When I import the pictures the time will be +1h compared to the correct time (I'am on European Summer Time) and Amman ist one hour in front of me.

When I set my mac to Jordan/Amman timezone the the times are correct and geotagging whit my Garmin gpx files will work fine.

Is this as bug or a feature ?

Regards
Daniel
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houdah
Hi!

I am not quite sure what the problem is.

What did you set the display time zone in HoudahGeo to?
This is set using the menu in the top right corner of the HoudahGeo window.

If you set the display time zone to Amman, you should see times local to Amman.
E.g. a clock tower photographed at noon, should show 12PM in HoudahGeo.

Best,
Pierre Bernard
Houdah Software s.à r.l.
Houdah Software s. à r. l.
https://www.houdah.com

HoudahGeo: One-stop photo geocoding
HoudahSpot: Advanced file search utility
Tembo: Easy and effective file search
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mohnid
Hi

After starting HoudahGeo timezone in the upper right corner is MESZ (German)

after importing the pics and leaving the proposed timezone Asia/Amman the timezone in the upper right corner changes to OESZ and all pictures times are +1 Hour.

Cheanging upper right back to MESZ shows the correct time.

I make pictures of the Garmin display showing the gps time from time to time to control time offset with the camera time.

I think the upper timezone switch is a little confusing...

And I also think the mappings are done on the displayed time, but maybe I am wrong.
But I think this was the case, and thats why i changed the timezone on the mac to get correct mappings.

Anyway, just some more comments on the case

Daniel
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houdah
Hi!

The menu in the top right corner is a "display time zone".
This ensures that all times - images and track logs - are displayed using the same time zone.
It has no influence whatsoever on the geocoding process.

Basically the menu has the same behavior as the one in the iCal / Calendar application.

When switching to a different display time zone, only the display changes, not the timestamps.
E.g. noon in London might show was 12PM using GMT time zone, but as 1PM using GMT+1.
Same time. Different display.

Best,
Pierre Bernard
Houdah Software s.à r.l.
Houdah Software s. à r. l.
https://www.houdah.com

HoudahGeo: One-stop photo geocoding
HoudahSpot: Advanced file search utility
Tembo: Easy and effective file search
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mohnid
Okay,

Now I made my pictures in the Asia/Amman (OESZ) timezone. When I look at the pictures and the display time should be the same as on my garmin, if OESZ is selected on the upper right corner and not +1 hour.

If I change upper right to MESZ  1 Hour correctly removed, but now it shows the correct picture time from OESZ...

I still think that there is something wrong in the processing of timezone

Daniel
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houdah
Hi!

I am sorry, I do not understand what you are trying to do.

- Your camera uses a certain time zone to record time stamps. E.g. OESZ
- In Camera Setup you need to tell HoudahGeo which time zone was used

After that you have several options for displaying time zone

- E.g. OESZ. The times should be the same as on your camera display
- CET. The times should be offset by the difference between OESZ and CET. I believe that is an hour

Anyways the display time zone makes no difference to the process.
It is just there so you can compare photo timestamps with track log begin and end times.

Your Garmin should record GMT time stamps. It may display time using a different time zone, but that should make no difference.
Do you remember what time zone the Garmin display was set to?

Do you have a photo of which you remember the exact time it was taken: clock tower, railway station arrival board, … ?

Best,
Pierre Bernard
Houdah Software s.à r.l.

Houdah Software s. à r. l.
https://www.houdah.com

HoudahGeo: One-stop photo geocoding
HoudahSpot: Advanced file search utility
Tembo: Easy and effective file search
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mohnid
I added some screenshots to visualize my problem.

First my reference picture

 

Here we see what Aperture tells me about the picture

 

and now what I see in HoudahGeo



T
he timezone on the Garmin was set accordingly to the current local time.

Doing all this again I found the problem, as I didn't look at the time on the Camera Setup screen....

 

I was assuming that only the timezone was important, but why is the photo time not the exif time without taking into account that the selected timezone is not the processing timezone.

Maybe this helps explaining my confusion...

Cheers
Daniel




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houdah
Hi!

I believe I now understand where the problems and misunderstandings were.

HoudahGeo offers 3 options for specifying camera time zone:
- camera clock settings
- clock-photo
- gps4cam

I was assuming you were using option #1.
You are however using option #2.

With this option (Uhr-Foto) you should tell HoudahGeo when the selected photo was taken.
This was taken 9:43 OESZ.
You need to give HoudahGeo both bits of information to have a complete / valid timestamp:
- a time
- the time zone it is expressed in

With "Asia/Amman" selected, you need to input 9:43:47
Your screenshot shows that you have the value off by one hour.

The way the Clock-Photo/Uhr-Foto option works is that you tell HoudahGeo: this photo was taken at 9:43 OESZ.
It then configures the project so that with a display time zone of OESZ you will see 9:43 as timestamp for that photo.

Best,
Pierre Bernard
Houdah Software s.à r.l.
Houdah Software s. à r. l.
https://www.houdah.com

HoudahGeo: One-stop photo geocoding
HoudahSpot: Advanced file search utility
Tembo: Easy and effective file search
0 0
mohnid
Hi

I agree with everything you are saying in the last post.
The only thing I would suggest is to use the actual exif time in the clock-photo option screen, without taking in account any of the timezones (computer or clock-photo 'photo-timezone' option)

Currently if you change the timezone also the clock time will change, this is confusing.

My suggestion to avoid confusion:
The clock-photo time setting should be set to the actual photo time, and will only be modified by user input on the photo-time option.

Kind regards
Daniel
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