Re: [Gpsbabel-misc] How do you sync GPS-data with photos?

[Al B. <gps...@ml...>]

Hi,


>  >> What does already exist for syncing the GPS-data with photos? <<
>
> google time... there are at least a few gps/photo sync tools out there
> already, but it's been a year since I looked, so, can't quote names.

I am looking for a tool which works with Linux and can be called from a 
bash-script.


I only found one, gpsphoto - 
http://www.carto.net/projects/photoTools/gpsPhoto/  but I didn't understand 
how to compile the cvs-version. It is not ./configure-make-make install, but 
I see makefiles.

The options look interesting. See 
http://sourceforge.net/docman/display_doc.php?docid=37063&group_id=180378

e.g.:
--gpsfile gpx      GPX track file. Multiple options are allowed.
--maxtimediff seconds    maximum difference time. Default: 120.
--maxdistance metres     maximum interpolation distance. Default: 20.
--timeoffset seconds     Camera time + seconds = GMT. Default: 0.

>  From a practical standpoint, (as I assume you know) if the clock in the
> camera is set to gmt, preferably with the gps time error factored in,
> there is a direct relationship between the gps track info and the image
> exif data.

Yes, but I don't want to correct the time in the pictures. I could do this 
easily with something like

exiftool "-alldates+=:: 2"

I think the tool should recognize the timezone because of the positon 
including daylight saving time.


> don't know about exiftools,

I "love" exiftool, it can nearly do everything and has great support by the 
author.

> but exifer has the ability to mass replace 
> exif time/date data using an offset value, so, it's possible to correct
> old image data if the time offset is known... for example, the camera
> time was local, but otherwise accurate, or, you compare an accurate
> clock to the camera's current setting.

Ok, but I wouldn't like to do this. At least gpsphoto can handle the time 
difference. It is rarely, that I leave my timezone, so maybe a manual 
correction would be ok for me.

> One other important aspect to accuracy would be how the gps track is
> generated and stored... i.e. the garmin issues.

I use a WBT-201 (G-Rays 2)

Any other programs than gpshoto you can recommend for me?

Can you tell me how to compile gpsphot from cvs or give me a link where it is 
described?

Can you recommend me a gpsphoto-syntax I should try? Gpsphoto  could be the 
right tool for me,  but I have to get it work.

Al